Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
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| comparative transcriptome and itraq proteome analyses of citrus root responses to candidatus liberibacter asiaticus infection. | root samples of 'sanhu' red tangerine trees infected with and without candidatus liberibacter asiaticus (clas) were collected at 50 days post inoculation and subjected to rna-sequencing and isobaric tags for relative and absolute quantification (itraq) to profile the differentially expressed genes (degs) and proteins (deps), respectively. quantitative real-time pcr was subsequently used to confirm the expression of 16 selected degs. results showed that a total of 3956 genes and 78 proteins were ... | 2015 | 26046530 |
| phylogenomics of xanthomonas field strains infecting pepper and tomato reveals diversity in effector repertoires and identifies determinants of host specificity. | bacterial spot disease of pepper and tomato is caused by four distinct xanthomonas species and is a severely limiting factor on fruit yield in these crops. the genetic diversity and the type iii effector repertoires of a large sampling of field strains for this disease have yet to be explored on a genomic scale, limiting our understanding of pathogen evolution in an agricultural setting. genomes of 67 xanthomonas euvesicatoria (xe), xanthomonas perforans (xp), and xanthomonas gardneri (xg) strai ... | 2015 | 26089818 |
| induced autoprocessing of the cytopathic makes caterpillars floppy-like effector domain of the vibrio vulnificus martx toxin. | the multifunctional-autoprocessing repeats-in-toxin (martx(vv)) toxin that harbours a varied repertoire of effector domains is the primary virulence factor of vibrio vulnificus. although ubiquitously present among biotype i toxin variants, the 'makes caterpillars floppy-like' effector domain (mcf(vv)) is previously unstudied. using transient expression and protein delivery, mcf(vv) and mcf(ah) from the aeromonas hydrophila martx(ah)) toxin are shown for the first time to induce cell rounding. al ... | 2015 | 25912102 |
| parp2 is the predominant poly(adp-ribose) polymerase in arabidopsis dna damage and immune responses. | poly (adp-ribose) polymerases (parps) catalyze the transfer of multiple poly(adp-ribose) units onto target proteins. poly(adp-ribosyl)ation plays a crucial role in a variety of cellular processes including, most prominently, auto-activation of parp at sites of dna breaks to activate dna repair processes. in humans, parp1 (the founding and most characterized member of the parp family) accounts for more than 90% of overall cellular parp activity in response to dna damage. we have found that, in co ... | 2015 | 25950582 |
| shigella manipulates host immune responses by delivering effector proteins with specific roles. | the intestinal epithelium deploys multiple defense systems against microbial infection to sense bacterial components and danger alarms, as well as to induce intracellular signal transduction cascades that trigger both the innate and the adaptive immune systems, which are pivotal for bacterial elimination. however, many enteric bacterial pathogens, including shigella, deliver a subset of virulence proteins (effectors) via the type iii secretion system (t3ss) that enable bacterial evasion from hos ... | 2015 | 25999954 |
| identification and distribution of the nbs-lrr gene family in the cassava genome. | plant resistance genes (r genes) exist in large families and usually contain both a nucleotide-binding site domain and a leucine-rich repeat domain, denoted nbs-lrr. the genome sequence of cassava (manihot esculenta) is a valuable resource for analysing the genomic organization of resistance genes in this crop. | 2015 | 25948536 |
| an overdose of the arabidopsis coreceptor brassinosteroid insensitive1-associated receptor kinase1 or its ectodomain causes autoimmunity in a suppressor of bir1-1-dependent manner. | the membrane-bound brassinosteroid insensitive1-associated receptor kinase1 (bak1) is a common coreceptor in plants and regulates distinct cellular programs ranging from growth and development to defense against pathogens. bak1 functions through binding to ligand-stimulated transmembrane receptors and activating their kinase domains via transphosphorylation. in the absence of microbes, bak1 activity may be suppressed by different mechanisms, like interaction with the regulatory bir (for bak1-int ... | 2015 | 25944825 |
| cyclic nucleotide gated channel gene family in tomato: genome-wide identification and functional analyses in disease resistance. | the cyclic nucleotide gated channel (cngc) is suggested to be one of the important calcium conducting channels. nevertheless, genome-wide identification and systemic functional analysis of cngc gene family in crop plant species have not yet been conducted. in this study, we performed genome-wide identification of cngc gene family in the economically important crop tomato (solanum lycopersicum l.) and analyzed function of the group ivb slcngc genes in disease resistance. eighteen cngc genes were ... | 2015 | 25999969 |
| production of the non-protein amino acid β-tyrosine in rice. | 2015 | 25901086 | |
| bacteriophages and phage-derived proteins--application approaches. | currently, the bacterial resistance, especially to most commonly used antibiotics has proved to be a severe therapeutic problem. nosocomial and community-acquired infections are usually caused by multidrug resistant strains. therefore, we are forced to develop an alternative or supportive treatment for successful cure of life-threatening infections. the idea of using natural bacterial pathogens such as bacteriophages is already well known. many papers have been published proving the high antibac ... | 2015 | 25666799 |
| identification of arabidopsis candidate genes in response to biotic and abiotic stresses using comparative microarrays. | plants have evolved with intricate mechanisms to cope with multiple environmental stresses. to adapt with biotic and abiotic stresses, plant responses involve changes at the cellular and molecular levels. the current study was designed to investigate the effects of combinations of different environmental stresses on the transcriptome level of arabidopsis genome using public microarray databases. we investigated the role of cyclopentenones in mediating plant responses to environmental stress thro ... | 2015 | 25933420 |
| guard cell slac1-type anion channels mediate flagellin-induced stomatal closure. | during infection plants recognize microbe-associated molecular patterns (mamps), and this leads to stomatal closure. this study analyzes the molecular mechanisms underlying this mamp response and its interrelation with aba signaling. stomata in intact arabidopsis thaliana plants were stimulated with the bacterial mamp flg22, or the stress hormone aba, by using the noninvasive nanoinfusion technique. intracellular double-barreled microelectrodes were applied to measure the activity of plasma memb ... | 2015 | 25932909 |
| growth and stress response in arabidopsis thaliana, nicotiana benthamiana, glycine max, solanum tuberosum and brassica napus cultivated under polychromatic leds. | the use of light emitting diodes (leds) brings several key advantages over existing illumination technologies for indoor plant cultivation. among these are that leds have predicted lifetimes from 50-100.000 hours without significant drops in efficiency and energy consumption is much lower compared to traditional fluorescent tubes. recent advances allow leds to be used with customized wavelengths for plant growth. however, most of these led growth systems use mixtures of chips emitting in several ... | 2015 | 27408615 |
| whole-genome sequencing of 10 pseudomonas syringae strains representing different host range spectra. | pseudomonas syringae is a ubiquitous bacterium that readily persists in environmental habitats as a saprophyte and also is responsible for numerous diseases of crops. here, we report the whole-genome sequences of 10 strains isolated from both woody and herbaceous plants that will contribute to the elucidation of the determinants of their host ranges. | 2015 | 25931602 |
| novptmenzy: a database for enzymes involved in novel post-translational modifications. | with the recent discoveries of novel post-translational modifications (ptms) which play important roles in signaling and biosynthetic pathways, identification of such ptm catalyzing enzymes by genome mining has been an area of major interest. unlike well-known ptms like phosphorylation, glycosylation, sumoylation, no bioinformatics resources are available for enzymes associated with novel and unusual ptms. therefore, we have developed the novptmenzy database which catalogs information on the seq ... | 2015 | 25931459 |
| elongator and its epigenetic role in plant development and responses to abiotic and biotic stresses. | elongator, a six-subunit protein complex, was initially isolated as an interactor of hyperphosphorylated rna polymerase ii in yeast, and was subsequently identified in animals and plants. elongator has been implicated in multiple cellular activities or biological processes including trna modification, histone modification, dna demethylation or methylation, tubulin acetylation, and exocytosis. studies in the model plant arabidopsis thaliana suggest that the structure of elongator and its function ... | 2015 | 25972888 |
| polyamine metabolism in flax in response to treatment with pathogenic and non-pathogenic fusarium strains. | flax crop yield is limited by various environmental stress factors, but the largest crop losses worldwide are caused by fusarium infection. polyamines are one of the many plant metabolites possibly involved in the plant response to infection. however, in flax plants the polyamine composition, genes involved in polyamine synthesis, and in particular their regulation, were previously unknown. the aim of this study was to investigate the polyamine synthesis pathway in flax and its involvement in re ... | 2015 | 25972886 |
| beyond glycolysis: gapdhs are multi-functional enzymes involved in regulation of ros, autophagy, and plant immune responses. | glyceraldehyde-3-phosphate dehydrogenase (gapdh) is an important enzyme in energy metabolism with diverse cellular regulatory roles in vertebrates, but few reports have investigated the importance of plant gapdh isoforms outside of their role in glycolysis. while animals possess one gapdh isoform, plants possess multiple isoforms. in this study, cell biological and genetic approaches were used to investigate the role of gapdhs during plant immune responses. individual arabidopsis gapdh knockouts ... | 2015 | 25918875 |
| cyanobacteria as cell factories to produce plant secondary metabolites. | cyanobacteria represent a promising platform for the production of plant secondary metabolites. their capacity to express plant p450 proteins, which have essential functions in the biosynthesis of many plant secondary metabolites, makes cyanobacteria ideal for this purpose, and their photosynthetic capability allows cyanobacteria to grow with simple nutrient inputs. this review summarizes the advantages of using cyanobacteria to transgenically produce plant secondary metabolites. some techniques ... | 2015 | 25973419 |
| the cost of phage resistance in a plant pathogenic bacterium is context-dependent. | parasites are ubiquitous features of living systems and many parasites severely reduce the fecundity or longevity of their hosts. this parasite-imposed selection on host populations should strongly favor the evolution of host resistance, but hosts typically face a trade-off between investment in reproductive fitness and investment in defense against parasites. the magnitude of such a trade-off is likely to be context-dependent, and accordingly costs that are key in shaping evolution in nature ma ... | 2015 | 25809535 |
| the udp-glucose: glycoprotein glucosyltransferase (uggt), a key enzyme in er quality control, plays a significant role in plant growth as well as biotic and abiotic stress in arabidopsis thaliana. | udp-glucose: glycoprotein glucosyltransferase (uggt) is a key player in the quality control mechanism (er-qc) that newly synthesized glycoproteins undergo in the er. it has been shown that the uggt arabidopsis orthologue is involved in er-qc; however, its role in plant physiology remains unclear. | 2015 | 26017403 |
| capping protein integrates multiple mamp signalling pathways to modulate actin dynamics during plant innate immunity. | plants and animals perceive diverse microbe-associated molecular patterns (mamps) via pattern recognition receptors and activate innate immune signalling. the actin cytoskeleton has been suggested as a target for innate immune signalling and a key transducer of cellular responses. however, the molecular mechanisms underlying actin remodelling and the precise functions of these rearrangements during innate immunity remain largely unknown. here we demonstrate rapid actin remodelling in response to ... | 2015 | 26018794 |
| a geminivirus betasatellite damages the structural and functional integrity of chloroplasts leading to symptom formation and inhibition of photosynthesis. | geminivirus infection often causes severe vein clearing symptoms in hosts. recently a betasatellite has emerged as a key regulator of symptom induction. to understand the host-betasatellite interactions in the process of symptom development, a systematic study was carried out involving symptoms induced by a betasatellite associated with radish leaf curl disease (ralcb) in nicotiana benthamiana. it has been found that βc1 protein localized to chloroplasts of host cells, and ralcb lacking βc1, whi ... | 2015 | 26113193 |
| deficient plastidic fatty acid synthesis triggers cell death by modulating mitochondrial reactive oxygen species. | programmed cell death (pcd) is of fundamental importance to development and defense in animals and plants. in plants, a well-recognized form of pcd is hypersensitive response (hr) triggered by pathogens, which involves the generation of reactive oxygen species (ros) and other signaling molecules. while the mitochondrion is a master regulator of pcd in animals, the chloroplast is known to regulate pcd in plants. arabidopsis mosaic death 1 (mod1), an enoyl-acyl carrier protein (acp) reductase esse ... | 2015 | 25906995 |
| early response to nanoparticles in the arabidopsis transcriptome compromises plant defence and root-hair development through salicylic acid signalling. | the impact of nano-scaled materials on photosynthetic organisms needs to be evaluated. plants represent the largest interface between the environment and biosphere, so understanding how nanoparticles affect them is especially relevant for environmental assessments. nanotoxicology studies in plants allude to quantum size effects and other properties specific of the nano-stage to explain increased toxicity respect to bulk compounds. however, gene expression profiles after exposure to nanoparticles ... | 2015 | 25903678 |
| small molecule fluoride toxicity agonists. | fluoride is a ubiquitous anion that inhibits a wide variety of metabolic processes. here, we report the identification of a series of compounds that enhance fluoride toxicity in escherichia coli and streptococcus mutans. these molecules were isolated by using a high-throughput screen (hts) for compounds that increase intracellular fluoride levels as determined via a fluoride riboswitch reporter fusion construct. a series of derivatives were synthesized to examine structure-activity relationships ... | 2015 | 25910244 |
| two n-terminal acetyltransferases antagonistically regulate the stability of a nod-like receptor in arabidopsis. | nod-like receptors (nlrs) serve as immune receptors in plants and animals. the stability of nlrs is tightly regulated, though its mechanism is not well understood. here, we show the crucial impact of n-terminal acetylation on the turnover of one plant nlr, suppressor of npr1, constitutive 1 (snc1), in arabidopsis thaliana. genetic and biochemical analyses of snc1 uncovered its multilayered regulation by different n-terminal acetyltransferase (nat) complexes. snc1 exhibits a few distinct n-termin ... | 2015 | 25966763 |
| phosphatidic acid produced by phospholipase d promotes rna replication of a plant rna virus. | eukaryotic positive-strand rna [(+)rna] viruses are intracellular obligate parasites replicate using the membrane-bound replicase complexes that contain multiple viral and host components. to replicate, (+)rna viruses exploit host resources and modify host metabolism and membrane organization. phospholipase d (pld) is a phosphatidylcholine- and phosphatidylethanolamine-hydrolyzing enzyme that catalyzes the production of phosphatidic acid (pa), a lipid second messenger that modulates diverse intr ... | 2015 | 26020241 |
| alginate-modifying enzymes: biological roles and biotechnological uses. | alginate denotes a group of industrially important 1-4-linked biopolymers composed of the c-5-epimers β-d-mannuronic acid (m) and α-l-guluronic acid (g). the polysaccharide is manufactured from brown algae where it constitutes the main structural cell wall polymer. the physical properties of a given alginate molecule, e.g., gel-strength, water-binding capacity, viscosity and biocompatibility, are determined by polymer length, the relative amount and distribution of g residues and the acetyl cont ... | 2015 | 26074905 |
| phytohormone involvement in the ustilago maydis- zea mays pathosystem: relationships between abscisic acid and cytokinin levels and strain virulence in infected cob tissue. | ustilago maydis is the causative agent of common smut of corn. early studies noted its ability to synthesize phytohormones and, more recently these growth promoting substances were confirmed as cytokinins (cks). cytokinins comprise a group of phytohormones commonly associated with actively dividing tissues. lab analyses identified variation in virulence between u. maydis dikaryon and solopathogen infections of corn cob tissue. samples from infected cob tissue were taken at sequential time points ... | 2015 | 26107181 |
| two serine residues in pseudomonas syringae effector hopz1a are required for acetyltransferase activity and association with the host co-factor. | gram-negative bacteria inject type iii secreted effectors (t3ses) into host cells to manipulate the immune response. the yopj family effector hopz1a produced by the plant pathogen pseudomonas syringae possesses acetyltransferase activity and acetylates plant proteins to facilitate infection. using mass spectrometry, we identified a threonine residue, t346, as the main autoacetylation site of hopz1a. two neighboring serine residues, s349 and s351, are required for the acetyltransferase activity o ... | 2015 | 26103463 |
| tomato slrbohb, a member of the nadph oxidase family, is required for disease resistance against botrytis cinerea and tolerance to drought stress. | nadph oxidases (also known as respiratory burst oxidase homologs, rbohs) are key enzymes that catalyze the generation of reactive oxygen species (ros) in plants. in the present study, eight slrboh genes were identified in tomato and their possible involvement in resistance to botrytis cinerea and drought tolerance was examined. expression of slrbohs was induced by b. cinerea and pseudomonas syringae pv. tomato but displayed distinct patterns. virus-induced gene silencing based silencing of slrbo ... | 2015 | 26157450 |
| manipulation of the xanthophyll cycle increases plant susceptibility to sclerotinia sclerotiorum. | the xanthophyll cycle is involved in dissipating excess light energy to protect the photosynthetic apparatus in a process commonly assessed from non-photochemical quenching (npq) of chlorophyll fluorescence. here, it is shown that the xanthophyll cycle is modulated by the necrotrophic pathogen sclerotinia sclerotiorum at the early stage of infection. incubation of sclerotinia led to a localized increase in npq even at low light intensity. further studies showed that this abnormal change in npq w ... | 2015 | 25993128 |
| plant immunity triggered by engineered in vivo release of oligogalacturonides, damage-associated molecular patterns. | oligogalacturonides (ogs) are fragments of pectin that activate plant innate immunity by functioning as damage-associated molecular patterns (damps). we set out to test the hypothesis that ogs are generated in planta by partial inhibition of pathogen-encoded polygalacturonases (pgs). a gene encoding a fungal pg was fused with a gene encoding a plant polygalacturonase-inhibiting protein (pgip) and expressed in transgenic arabidopsis plants. we show that expression of the pgip-pg chimera results i ... | 2015 | 25870275 |
| de novo assembly and transcriptomic profiling of the grazing response in stipa grandis. | stipa grandis (poaceae) is one of the dominant species in a typical steppe of the inner mongolian plateau. however, primarily due to heavy grazing, the grasslands have become seriously degraded, and s. grandis has developed a special growth-inhibition phenotype against the stressful habitat. because of the lack of transcriptomic and genomic information, the understanding of the molecular mechanisms underlying the grazing response of s. grandis has been prohibited. | 2015 | 25875617 |
| t346hunter: a novel web-based tool for the prediction of type iii, type iv and type vi secretion systems in bacterial genomes. | t346hunter (type three, four and six secretion system hunter) is a web-based tool for the identification and localisation of type iii, type iv and type vi secretion systems (t3ss, t4ss and t6ss, respectively) clusters in bacterial genomes. non-flagellar t3ss (nf-t3ss) and t6ss are complex molecular machines that deliver effector proteins from bacterial cells into the environment or into other eukaryotic or prokaryotic cells, with significant implications for pathogenesis of the strains encoding ... | 2015 | 25867189 |
| signal regulators of systemic acquired resistance. | salicylic acid (sa) is an important phytohormone that plays a vital role in a number of physiological responses, including plant defense. the last two decades have witnessed a number of breakthroughs related to biosynthesis, transport, perception and signaling mediated by sa. these findings demonstrate that sa plays a crictical role in both local and systemic defense responses. systemic acquired resistance (sar) is one such sa-dependent response. sar is a long distance signaling mechanism that p ... | 2015 | 25918514 |
| transcriptional profile of sweet orange in response to chitosan and salicylic acid. | resistance inducers have been used in annual crops as an alternative for disease control. wood perennial fruit trees, such as those of the citrus species, are candidates for treatment with resistance inducers, such as salicylic acid (sa) and chitosan (chi). however, the involved mechanisms in resistance induced by elicitors in citrus are currently few known. | 2015 | 25887907 |
| role of acsr in expression of the acetyl-coa synthetase gene in vibrio vulnificus. | vars/vara is one of the global factors regulating diverse aspects of the metabolism and virulence of bacteria including pathogenic vibrio spp. an experiment to identify the vars/vara-regulon in v. vulnificus revealed that a putative luxr-type transcriptional regulator was down-regulated in δvara mutant. to investigate the roles of this regulatory cascade, the target gene regulated by a luxr-regulator was identified and its expression was characterized. | 2015 | 25887971 |
| characterization of arabidopsis transcriptional responses to different aphid species reveals genes that contribute to host susceptibility and non-host resistance. | aphids are economically important pests that display exceptional variation in host range. the determinants of diverse aphid host ranges are not well understood, but it is likely that molecular interactions are involved. with significant progress being made towards understanding host responses upon aphid attack, the mechanisms underlying non-host resistance remain to be elucidated. here, we investigated and compared arabidopsis thaliana host and non-host responses to aphids at the transcriptional ... | 2015 | 25993686 |
| a terpenoid phytoalexin plays a role in basal defense of nicotiana benthamiana against potato virus x. | terpenoid phytoalexins function as defense compound against a broad spectrum of pathogens and pests in the plant kingdom. however, the role of phytoalexin in antiviral defense is still elusive. in this study, we identified the biosynthesis pathway of a sesquiterpenoid phytoalexin, capsidiol 3-acetate as an antiviral response against rna virus potato virus x (pvx) in nicotiana benthamiana. nbtps1 and nbeah genes were found strongly induced by pvx-infection. enzymatic activity and genetic evidence ... | 2015 | 25993114 |
| involvement of nitric oxide in the jasmonate-dependent basal defense against root-knot nematode in tomato plants. | jasmonic acid (ja) and nitric oxide (no) are well-characterized signaling molecules in plant defense responses. however, their roles in plant defense against root-knot nematode (rkn, meloidogyne incognita) infection are largely unknown. in this study, we found that the transcript levels of the ja- and no-related biosynthetic and signaling component genes were induced after rkn infection. application of exogenous ja and sodium nitroprusside (snp; a no donor) significantly decreased the number of ... | 2015 | 25914698 |
| integrating data on the arabidopsis npr1/npr3/npr4 salicylic acid receptors; a differentiating argument. | salicylic acid (sa) is a mandatory plant metabolite in the deployment of systemic acquired resistance (sar), a broad-spectrum systemic immune response induced by local inoculation with avirulent pathogens. the npr1 transcription co-activator is the central node positively regulating sar. sa was the last of the major hormones to be without a known receptor. recently, npr1 was shown to be the direct link between sa and gene activation. this discovery seems to be controversial. npr1 being an sa-rec ... | 2015 | 25914712 |
| genome sequence of a pseudomonas syringae pv. tabaci strain, yuexi-1, causing wildfire disease in tobacco. | we determined the draft genome sequence of the pseudomonas syringae pv. tabaci strain yuexi-1. it was isolated from tobacco sample of yuexi-1, sichuan province, china, by our laboratory. the genome contains 6,232,497 bp and has a g+c content of 58.2 mol%. | 2015 | 25858831 |
| identification and functional analysis of genome mutations in a fluoride-resistant streptococcus mutans strain. | it is known that fluoride-resistant microorganisms are different from fluoride-sensitive ones in growth, adherence and metabolic activity. it was hypothesized that these phenotypic differences were due to stable genotypic changes in the fluoride-resistant strains. however, until now, no studies have reported these genotypic changes. the aim of this study is to identify such changes in a fluoride-resistant streptococcus mutans strain (c180-2fr) using whole-genome shotgun (wgs) sequencing and to e ... | 2015 | 25856576 |
| a taxonomic framework for emerging groups of ecologically important marine gammaproteobacteria based on the reconstruction of evolutionary relationships using genome-scale data. | in recent years a large number of isolates were obtained from saline environments that are phylogenetically related to distinct clades of oligotrophic marine gammaproteobacteria, which were originally identified in seawater samples using cultivation independent methods and are characterized by high seasonal abundances in coastal environments. to date a sound taxonomic framework for the classification of these ecologically important isolates and related species in accordance with their evolutiona ... | 2015 | 25914684 |
| cysteine-rich receptor-like kinase crk5 as a regulator of growth, development, and ultraviolet radiation responses in arabidopsis thaliana. | in plants, receptor-like protein kinases play essential roles in signal transduction by recognizing extracellular stimuli and activating the downstream signalling pathways. cysteine-rich receptor-like kinases (crks) constitute a large subfamily of receptor-like protein kinases, with 44 members in arabidopsis thaliana. they are distinguished by the novel c-x8-c-x2-c motif (duf26) in the extracellular domains. one of them, crk5, is an important component of the biochemical machinery involved in th ... | 2015 | 25969551 |
| design and construction of an inexpensive homemade plant growth chamber. | plant growth chambers produce controlled environments, which are crucial in making reproducible observations in experimental plant biology research. commercial plant growth chambers can provide precise controls of environmental parameters, such as temperature, humidity, and light cycle, and the capability via complex programming to regulate these environmental parameters. but they are expensive. the high cost of maintaining a controlled growth environment is often a limiting factor when determin ... | 2015 | 25965420 |
| experimental correlation of substrate position with reaction outcome in the aliphatic halogenase, syrb2. | the iron(ii)- and 2-(oxo)glutarate-dependent (fe/2og) oxygenases catalyze an array of challenging transformations, but how individual members of the enzyme family direct different outcomes is poorly understood. the fe/2og halogenase, syrb2, chlorinates c4 of its native substrate, l-threonine appended to the carrier protein, syrb1, but hydroxylates c5 of l-norvaline and, to a lesser extent, c4 of l-aminobutyric acid when syrb1 presents these non-native amino acids. to test the hypothesis that pos ... | 2015 | 25965587 |
| fine mapping and characterization of candidate genes that control resistance to cercospora sojina k. hara in two soybean germplasm accessions. | frogeye leaf spot (fls), caused by the fungus cercospora sojina k. hara, may cause a significant yield loss to soybean growers in regions with a warm and humid climate. two soybean accessions, pi 594891 and pi 594774, were identified to carry a high level of resistance similar to that conditioned by the rcs3 gene in 'davis'. previously, we reported that the resistance to fls in these two plant introductions (pis) was controlled by a novel gene (s) on chromosome 13 that is different from rcs3. to ... | 2015 | 25993056 |
| the guard cell metabolome: functions in stomatal movement and global food security. | guard cells represent a unique single cell-type system for the study of cellular responses to abiotic and biotic perturbations that affect stomatal movement. decades of effort through both classical physiological and functional genomics approaches have generated an enormous amount of information on the roles of individual metabolites in stomatal guard cell function and physiology. recent application of metabolomics methods has produced a substantial amount of new information on metabolome contro ... | 2015 | 26042131 |
| identification and expression analysis of candidate genes associated with defense responses to phytophthora capsici in pepper line "pi 201234". | phytophthora capsici (leonian), classified as an oomycete, seriously threatens the production of pepper (capsicum annuum). current understanding of the defense responses in pepper to p. capsici is limited. in this study, rna-sequencing analysis was utilized to identify differentially expressed genes in the resistant line "pi 201234", with 1220 differentially expressed genes detected. of those genes, 480 were up-regulated and 740 were down-regulated, with 211 candidate genes found to be involved ... | 2015 | 25993303 |
| the arabidopsis kh-domain rna-binding protein esr1 functions in components of jasmonate signalling, unlinking growth restraint and resistance to stress. | glutathione s-transferases (gsts) play important roles in the protection of cells against toxins and oxidative damage where one arabidopsis member, gstf8, has become a commonly used marker gene for early stress and defense responses. a gstf8 promoter fragment fused to the luciferase reporter gene was used in a forward genetic screen for arabidopsis mutants with up-regulated gstf8 promoter activity. this identified the esr1-1 (enhanced stress response 1) mutant which also conferred increased resi ... | 2015 | 25985302 |
| overexpression of an ap2/erf type transcription factor oserebp1 confers biotic and abiotic stress tolerance in rice. | ap2/erf-type transcription factors regulate important functions of plant growth and development as well as responses to environmental stimuli. a rice ap2/erf transcription factor, oserebp1 is a downstream component of a signal transduction pathway in a specific interaction between rice (oryza sativa) and its bacterial pathogen, xoo (xanthomonas oryzae pv. oryzae). constitutive expression of oserebp1 in rice driven by maize ubiquitin promoter did not affect normal plant growth. microarray analysi ... | 2015 | 26035591 |
| involvement of the caleosin/peroxygenase rd20 in the control of cell death during arabidopsis responses to pathogens. | caleosins, mostly found in lipid droplets of seeds and leaves, are believed to play physiological roles through their enzymatic capacities to produce oxylipins. we recently identified the caleosin rd20 as a peroxygenase reducing endogenous fatty acid hydroperoxides into their corresponding alcohols. such oxylipins confer tolerance to oxidative stress by decreasing reactive oxygen species accumulation and by minimizing cell death. rd20 expression being induced by pathogens, we have examined the m ... | 2015 | 25830533 |
| anti-toxoplasma activity of 2-(naphthalene-2-γlthiol)-1h indole. | this study was undertaken to evaluate the viability, infectivity and immunity of toxoplasma gondii tachyzoites exposed to 2-(naphthalene-2-ylthio)-1h-indole. | 2015 | 26246814 |
| wheat homologs of yeast atg6 function in autophagy and are implicated in powdery mildew immunity. | autophagy-related atg6 proteins are pleiotropic proteins functioning in autophagy and the phosphatidylinositol 3-phosphate-signaling pathways. arabidopsis atg6 regulates normal plant growth, pollen development and germination, and plant responses to biotic/abiotic stresses. however, the atg6 functions in wheat (triticum aestivum l.), an important food crop, are lacking. | 2015 | 25888209 |
| novel disease susceptibility factors for fungal necrotrophic pathogens in arabidopsis. | host cells use an intricate signaling system to respond to invasions by pathogenic microorganisms. although several signaling components of disease resistance against necrotrophic fungal pathogens have been identified, our understanding for how molecular components and host processes contribute to plant disease susceptibility is rather sparse. here, we identified four transcription factors (tfs) from arabidopsis that limit pathogen spread. arabidopsis mutants defective in any of these tfs displa ... | 2015 | 25830627 |
| investigating the association between flowering time and defense in the arabidopsis thaliana-fusarium oxysporum interaction. | plants respond to pathogens either by investing more resources into immunity which is costly to development, or by accelerating reproductive processes such as flowering time to ensure reproduction occurs before the plant succumbs to disease. in this study we explored the link between flowering time and pathogen defense using the interaction between arabidopsis thaliana and the root infecting fungal pathogen fusarium oxysporum. we report that f. oxysporum infection accelerates flowering time and ... | 2015 | 26034991 |
| minimal genomes of mycoplasma-related endobacteria are plastic and contain host-derived genes for sustained life within glomeromycota. | arbuscular mycorrhizal fungi (amf, glomeromycota) colonize roots of the majority of terrestrial plants. they provide essential minerals to their plant hosts and receive photosynthates in return. all major lineages of amf harbor endobacteria classified as mollicutes, and known as mycoplasma-related endobacteria (mre). except for their substantial intrahost genetic diversity and ability to transmit vertically, virtually nothing is known about the life history of these endobacteria. to understand m ... | 2015 | 25964324 |
| oshub1 and oshub2 interact with spin6 and form homo- and hetero-dimers in rice. | ubiquitin-mediated protein degradation is involved in various cellular processes including plant-microbe interactions and defense responses. although there are many e3 ubiquitin ligases in rice, the functions of their targets in defense responses are unclear. we recently found that spin6 (spl11-interacting protein 6) is a rho gtpase-activating protein and acts as the target of the e3 ligase spl11, a negative regulator of plant cell death and innate immunity. our results showed that spin6 serves ... | 2015 | 25955387 |
| regulation of coronafacoyl phytotoxin production by the pas-luxr family regulator cfar in the common scab pathogen streptomyces scabies. | potato common scab is an economically important crop disease that is characterized by the formation of superficial, raised or pitted lesions on the potato tuber surface. the most widely distributed causative agent of the disease is streptomyces scabies, which produces the phytotoxic secondary metabolite thaxtomin a that serves as a key virulence factor for the organism. recently, it was demonstrated that s. scabies can also produce the phytotoxic secondary metabolite coronafacoyl-l-isoleucine (c ... | 2015 | 25826255 |
| unmasking host and microbial strategies in the agrobacterium-plant defense tango. | coevolutionary forces drive adaptation of both plant-associated microbes and their hosts. eloquently captured in the red queen hypothesis, the complexity of each plant-pathogen relationship reflects escalating adversarial strategies, but also external biotic and abiotic pressures on both partners. innate immune responses are triggered by highly conserved pathogen-associated molecular patterns, or pamps, that are harbingers of microbial presence. upon cell surface receptor-mediated recognition of ... | 2015 | 25873923 |
| jasmonate signalling in arabidopsis involves sgt1b-hsp70-hsp90 chaperone complexes. | plant hormones play pivotal roles in growth, development and stress responses. although it is essential to our understanding of hormone signalling, how plants maintain a steady state level of hormone receptors is poorly understood. we show that mutation of the arabidopsis thaliana co-chaperone sgt1b impairs responses to the plant hormones jasmonate, auxin and gibberellic acid, but not brassinolide and abscisic acid, and that sgt1b and its homologue sgt1a are involved in maintaining the steady st ... | 2015 | 27054042 |
| the pseudomonas aeruginosa pa14 abc transporter nppa1a2bcd is required for uptake of peptidyl nucleoside antibiotics. | analysis of the genome sequence of pseudomonas aeruginosa pa14 revealed the presence of an operon encoding an abc-type transporter (nppa1a2bcd) showing homology to the yej transporter of escherichia coli. the yej transporter is involved in the uptake of the peptide-nucleotide antibiotic microcin c, a translation inhibitor that targets the enzyme aspartyl-trna synthetase. furthermore, it was recently shown that the opp transporter from p. aeruginosa pao1, which is identical to npp, is required fo ... | 2015 | 25917903 |
| the divergent roles of staygreen (sgr) homologs in chlorophyll degradation. | degradation of chlorophyll (chl) by chl catabolic enzymes (cces) causes the loss of green color that typically occurs during senescence of leaves. in addition to cces, staygreen1 (sgr1) functions as a key regulator of chl degradation. although sgr1 mutants in many plant species exhibit a stay-green phenotype, the biochemical function of the sgr1 protein remains elusive. many recent studies have examined the physiological and molecular roles of sgr1 and its homologs (sgr2 and sgr-like) in chl met ... | 2015 | 25913011 |
| hyperspectral and thermal imaging of oilseed rape (brassica napus) response to fungal species of the genus alternaria. | in this paper, thermal (8-13 µm) and hyperspectral imaging in visible and near infrared (vnir) and short wavelength infrared (swir) ranges were used to elaborate a method of early detection of biotic stresses caused by fungal species belonging to the genus alternaria that were host (alternaria alternata, alternaria brassicae, and alternaria brassicicola) and non-host (alternaria dauci) pathogens to oilseed rape (brassica napus l.). the measurements of disease severity for chosen dates after inoc ... | 2015 | 25826369 |
| transcription activator-like effector nuclease-mediated generation and metabolic analysis of camalexin-deficient cyp71a12 cyp71a13 double knockout lines. | in arabidopsis (arabidopsis thaliana), a number of defense-related metabolites are synthesized via indole-3-acetonitrile (ian), including camalexin and indole-3-carboxylic acid (icooh) derivatives. cytochrome p450 71a13 (cyp71a13) is a key enzyme for camalexin biosynthesis and catalyzes the conversion of indole-3-acetaldoxime (iaox) to ian. the cyp71a13 gene is located in tandem with its close homolog cyp71a12, also encoding an iaox dehydratase. however, for cyp71a12, indole-3-carbaldehyde and c ... | 2015 | 25953104 |
| cytoplastic glyceraldehyde-3-phosphate dehydrogenases interact with atg3 to negatively regulate autophagy and immunity in nicotiana benthamiana. | autophagy as a conserved catabolic pathway can respond to reactive oxygen species (ros) and plays an important role in degrading oxidized proteins in plants under various stress conditions. however, how ros regulates autophagy in response to oxidative stresses is largely unknown. here, we show that autophagy-related protein 3 (atg3) interacts with the cytosolic glyceraldehyde-3-phosphate dehydrogenases (gapcs) to regulate autophagy in nicotiana benthamiana plants. we found that oxidative stress ... | 2015 | 25829441 |
| proteomic analysis of citrus sinensis roots and leaves in response to long-term magnesium-deficiency. | magnesium (mg)-deficiency is frequently observed in citrus plantations and is responsible for the loss of productivity and poor fruit quality. knowledge on the effects of mg-deficiency on upstream targets is scarce. seedlings of 'xuegan' [citrus sinensis (l.) osbeck] were irrigated with mg-deficient (0 mm mgso4) or mg-sufficient (1 mm mgso4) nutrient solution for 16 weeks. thereafter, we first investigated the proteomic responses of c. sinensis roots and leaves to mg-deficiency using two-dimensi ... | 2015 | 25887480 |
| genome-wide dna binding pattern of two-component system response regulator rhpr in pseudomonas syringae. | although pseudomonas syringae uses the two-component system rhprs to modulate the expression of type iii secretion system (t3ss) genes and pathogenicity, the molecular mechanisms and the regulon of rhprs have yet to be fully demonstrated. we have performed a genome-wide analysis of rhpr binding to dna prepared from p. syringae pv. phaseolicola in order to identify candidate direct targets of rhpr-mediated transcriptional regulation, as described in our recent article [1]. the data are available ... | 2015 | 26484202 |
| a secreted effector protein of ustilago maydis guides maize leaf cells to form tumors. | the biotrophic smut fungus ustilago maydis infects all aerial organs of maize (zea mays) and induces tumors in the plant tissues. u. maydis deploys many effector proteins to manipulate its host. previously, deletion analysis demonstrated that several effectors have important functions in inducing tumor expansion specifically in maize leaves. here, we present the functional characterization of the effector see1 (seedling efficient effector1). see1 is required for the reactivation of plant dna syn ... | 2015 | 25888589 |
| central role of gimap5 in maintaining peripheral tolerance and t cell homeostasis in the gut. | inflammatory bowel disease (ibd) including crohn's disease and ulcerative colitis is often precipitated by an abnormal immune response to microbiota due to host genetic aberrancies. recent studies highlight the importance of the host genome and microflora interactions in the pathogenesis of mucosal inflammation including ibd. specifically, genome-wide (gwas) and also next-generation sequencing (ngs)-including whole exome or genome sequencing-have uncovered a large number of susceptibility loci t ... | 2015 | 25944983 |
| cnl disease resistance genes in soybean and their evolutionary divergence. | disease resistance genes (r-genes) encode proteins involved in detecting pathogen attack and activating downstream defense molecules. recent availability of soybean genome sequences makes it possible to examine the diversity of gene families including disease-resistant genes. the objectives of this study were to identify coiled-coil nbs-lrr (= cnl) r-genes in soybean, infer their evolutionary relationships, and assess structural as well as functional divergence of the r-genes. profile hidden mar ... | 2015 | 25922568 |
| functional roles of three cutin biosynthetic acyltransferases in cytokinin responses and skotomorphogenesis. | cytokinins (cks) regulate plant development and growth via a two-component signaling pathway. by forward genetic screening, we isolated an arabidopsis mutant named grow fast on cytokinins 1 (gfc1), whose seedlings grew larger aerial parts on ms medium with ck. gfc1 is allelic to a previously reported cutin mutant defective in cuticular ridges (dcr). gfc1/dcr encodes a soluble bahd acyltransferase (a name based on the first four enzymes characterized in this family: benzylalcohol o-acetyltransfer ... | 2015 | 25803274 |
| phylogenetic spectrum and analysis of antibacterial activities of leaf extracts from plants of the genus rhododendron. | plants are traditionally used for medicinal treatment of numerous human disorders including infectious diseases caused by microorganisms. due to the increasing resistance of many pathogens to commonly used antimicrobial agents, there is an urgent need for novel antimicrobial compounds. plants of the genus rhododendron belong to the woody representatives of the family ericaceae, which are typically used in a range of ethno-medical applications. there are more than one thousand rhododendron specie ... | 2015 | 25879877 |
| goodness-of-fit tests and model diagnostics for negative binomial regression of rna sequencing data. | this work is about assessing model adequacy for negative binomial (nb) regression, particularly (1) assessing the adequacy of the nb assumption, and (2) assessing the appropriateness of models for nb dispersion parameters. tools for the first are appropriate for nb regression generally; those for the second are primarily intended for rna sequencing (rna-seq) data analysis. the typically small number of biological samples and large number of genes in rna-seq analysis motivate us to address the tr ... | 2015 | 25787144 |
| transcriptomic profiling of arabidopsis thaliana mutant pad2.1 in response to combined cold and osmotic stress. | the contribution of glutathione (gsh) in stress tolerance, defense response and antioxidant signaling is an established fact. in this study transcriptome analysis of pad2.1, an arabidopsis thaliana mutant, after combined osmotic and cold stress treatment has been performed to explore the intricate position of gsh in the stress and defense signaling network in planta. microarray data revealed the differential regulation of about 1674 genes in pad2.1 amongst which 973 and 701 were significantly up ... | 2015 | 25822199 |
| molecular and functional characterization of recd, a novel member of the sf1 family of helicases, from mycobacterium tuberculosis. | the annotated whole-genome sequence of mycobacterium tuberculosis revealed the presence of a putative recd gene; however, the biochemical characteristics of its encoded protein product (mtrecd) remain largely unknown. here, we show that mtrecd exists in solution as a stable homodimer. protein-dna binding assays revealed that mtrecd binds efficiently to single-stranded dna and linear duplexes containing 5' overhangs relative to the 3' overhangs but not to blunt-ended duplex. furthermore, mtrecd b ... | 2015 | 25802334 |
| roles and programming of arabidopsis argonaute proteins during turnip mosaic virus infection. | in eukaryotes, argonaute proteins (agos) associate with micrornas (mirnas), short interfering rnas (sirnas), and other classes of small rnas to regulate target rna or target loci. viral infection in plants induces a potent and highly specific antiviral rna silencing response characterized by the formation of virus-derived sirnas. arabidopsis thaliana has ten ago genes of which ago1, ago2, and ago7 have been shown to play roles in antiviral defense. a genetic analysis was used to identify and cha ... | 2015 | 25806948 |
| how salicylic acid takes transcriptional control over jasmonic acid signaling. | transcriptional regulation is a central process in plant immunity. the induction or repression of defense genes is orchestrated by signaling networks that are directed by plant hormones of which salicylic acid (sa) and jasmonic acid (ja) are the major players. extensive cross-communication between the hormone signaling pathways allows for fine tuning of transcriptional programs, determining resistance to invaders and trade-offs with plant development. here, we give an overview of how sa can cont ... | 2015 | 25859250 |
| wrky proteins: signaling and regulation of expression during abiotic stress responses. | wrky proteins are emerging players in plant signaling and have been thoroughly reported to play important roles in plants under biotic stress like pathogen attack. however, recent advances in this field do reveal the enormous significance of these proteins in eliciting responses induced by abiotic stresses. wrky proteins act as major transcription factors, either as positive or negative regulators. specific wrky factors which help in the expression of a cluster of stress-responsive genes are bei ... | 2015 | 25879071 |
| cyp94-mediated jasmonoyl-isoleucine hormone oxidation shapes jasmonate profiles and attenuates defence responses to botrytis cinerea infection. | induced resistance to the necrotrophic pathogen botrytis cinerea depends on jasmonate metabolism and signalling in arabidopsis. we have presented here extensive jasmonate profiling in this pathosystem and investigated the impact of the recently reported jasmonoyl-isoleucine (ja-ile) catabolic pathway mediated by cytochrome p450 (cyp94) enzymes. using a series of mutant and overexpressing (oe) plant lines, we showed that cyp94b3 and cyp94c1 are integral components of the fungus-induced jasmonate ... | 2015 | 25903915 |
| a vamp-associated protein, pva31 is involved in leaf senescence in arabidopsis. | vamp-associated proteins (vaps) are highly conserved among eukaryotes. here, we report a functional analysis of one of the vaps, pva31, and demonstrate its novel function on leaf senescence in arabidopsis. the expression of pva31 is highly induced in senescence leaves, and localizes to the plasma membrane as well as the ara7-positive endosomes. yeast two-hybrid analysis demonstrates that pva31 is interacted with the plasma membrane localized-vamp proteins, vamp721/722/724 but not with the endoso ... | 2015 | 25897470 |
| structure and function of the bacterial root microbiota in wild and domesticated barley. | the microbial communities inhabiting the root interior of healthy plants, as well as the rhizosphere, which consists of soil particles firmly attached to roots, engage in symbiotic associations with their host. to investigate the structural and functional diversification among these communities, we employed a combination of 16s rrna gene profiling and shotgun metagenome analysis of the microbiota associated with wild and domesticated accessions of barley (hordeum vulgare). bacterial families com ... | 2015 | 25732064 |
| myconanoparticles: synthesis and their role in phytopathogens management. | nanotechnology can offer green and eco-friendly alternatives for plant disease management. apart from being eco-friendly, fungi are used as bio-manufacturing units, which will provide an added benefit in being easy to use, as compared to other microbes. the non-pathogenic nature of some fungal species in combination with the simplicity of production and handling will improve the mass production of silver nanoparticles. recently, a diverse range of fungi have been screened for their ability to cr ... | 2015 | 26019636 |
| the n-terminal domain of the tomato immune protein prf contains multiple homotypic and pto kinase interaction sites. | resistance to pseudomonas syringae bacteria in tomato (solanum lycopersicum) is conferred by the prf recognition complex, composed of the nucleotide-binding leucine-rich repeats protein prf and the protein kinase pto. the complex is activated by recognition of the p. syringae effectors avrpto and avrptob. the n-terminal domain is responsible for prf homodimerization, which brings two pto kinases into close proximity and holds them in inactive conformation in the absence of either effector. negat ... | 2015 | 25792750 |
| the upr branch ire1-bzip60 in plants plays an essential role in viral infection and is complementary to the only upr pathway in yeast. | the unfolded protein response (upr) signaling network encompasses two pathways in plants, one mediated by inositol-requiring protein-1 (ire1)-bzip60 mrna and the other by site-1/site-2 proteases (s1p/s2p)-bzip17/bzip28. as the major sensor of upr in eukaryotes, ire1, in response to endoplasmic reticulum (er) stress, catalyzes the unconventional splicing of hac1 in yeast, bzip60 in plants and xbp1 in metazoans. recent studies suggest that ire1p and hac1 mrna, the only upr pathway found in yeast, ... | 2015 | 25875739 |
| how bacterial cells keep ribonucleases under control. | ribonucleases (rnases) play an essential role in essentially every aspect of rna metabolism, but they also can be destructive enzymes that need to be regulated to avoid unwanted degradation of rna molecules. as a consequence, cells have evolved multiple strategies to protect rnas against rnase action. they also utilize a variety of mechanisms to regulate the rnases themselves. these include post-transcriptional regulation, post-translational modification, trans-acting inhibitors, cellular locali ... | 2015 | 25878039 |
| phylogeny and evolution of plant macrophage migration inhibitory factor/d-dopachrome tautomerase-like proteins. | the human (homo sapiens) chemokine-like protein macrophage migration inhibitory factor (hsmif) is a pivotal mediator of inflammatory, infectious and immune diseases including septic shock, colitis, malaria, rheumatoid arthritis, and atherosclerosis, as well as tumorigenesis. hsmif has been found to exhibit several sequential and three-dimensional sequence motifs that in addition to its receptor binding sites include catalytic sites for oxidoreductase and tautomerase activity, which provide this ... | 2015 | 25888527 |
| identification of the linkage between a-polysaccharide and the core in the a-lipopolysaccharide of porphyromonas gingivalis w50. | porphyromonas gingivalis synthesizes two lipopolysaccharides (lpss), o-lps and a-lps. the structure of the core oligosaccharide (os) of o-lps and the attachment site of the o-polysaccharide (o-ps) repeating unit [ → 3)-α-d-galp-(1 → 6)-α-d-glcp-(1 → 4)-α-l-rhap-(1 → 3)-β-d-galnacp-(1 → ] to the core have been elucidated using the δpg1051 (waal, o-antigen ligase) and δpg1142 (wzy, o-antigen polymerase) mutant strains, respectively. the core os occurs as an "uncapped" glycoform devoid of o-ps and ... | 2015 | 25733619 |
| tanac1 acts as a negative regulator of stripe rust resistance in wheat, enhances susceptibility to pseudomonas syringae, and promotes lateral root development in transgenic arabidopsis thaliana. | plant-specific nac transcription factors (tfs) constitute a large family and play important roles in regulating plant developmental processes and responses to environmental stresses, but only some of them have been investigated for effects on disease reaction in cereal crops. virus-induced gene silencing (vigs) is an effective strategy for rapid functional analysis of genes in plant tissues. in this study, tanac1, encoding a new member of the nac1 subgroup, was cloned from bread wheat and charac ... | 2015 | 25774162 |
| proteomic identification of early salicylate- and flg22-responsive redox-sensitive proteins in arabidopsis. | accumulation of reactive oxygen species (ros) is one of the early defense responses against pathogen infection in plants. the mechanism about the initial and direct regulation of the defense signaling pathway by ros remains elusive. perturbation of cellular redox homeostasis by ros is believed to alter functions of redox-sensitive proteins through their oxidative modifications. here we report an oxitraq-based proteomic study in identifying proteins whose cysteines underwent oxidative modificatio ... | 2015 | 25720653 |
| an assessment of heavy ion irradiation mutagenesis for reverse genetics in wheat (triticum aestivum l.). | reverse genetic techniques harnessing mutational approaches are powerful tools that can provide substantial insight into gene function in plants. however, as compared to diploid species, reverse genetic analyses in polyploid plants such as bread wheat can present substantial challenges associated with high levels of sequence and functional similarity amongst homoeologous loci. we previously developed a high-throughput method to identify deletions of genes within a physically mutagenized wheat po ... | 2015 | 25719507 |
| the dominant negative arm domain uncovers multiple functions of pub13 in arabidopsis immunity, flowering, and senescence. | regulating the intensity and duration of immune responses is crucial to combat infections without deleterious side effects. arabidopsis fls2, the receptor for bacterial flagellin, activates immune signalling by association with its partner bak1. upon flagellin (flg22) perception, the plant u-box e3 ubiquitin ligases pub12 and pub13 complex with fls2 in a bak1-dependent manner, and ubiquitinate fls2 for protein degradation, thereby down-regulating flagellin signalling. domain deletion analysis in ... | 2015 | 25873653 |
| a novel function for arabidopsis cyclase1 in programmed cell death revealed by isobaric tags for relative and absolute quantitation (itraq) analysis of extracellular matrix proteins. | programmed cell death is essential for plant development and stress adaptation. a detailed understanding of the signal transduction pathways that regulate plant programmed cell death requires identification of the underpinning protein networks. here, we have used a protagonist and antagonist of programmed cell death triggered by fumonisin b1 as probes to identify key cell death regulatory proteins in arabidopsis. our hypothesis was that changes in the abundance of cell death-regulatory proteins ... | 2015 | 25862728 |
| vacuolar processing enzyme in plant programmed cell death. | vacuolar processing enzyme (vpe) is a cysteine proteinase originally identified as the proteinase responsible for the maturation and activation of vacuolar proteins in plants, and it is known to be an ortholog of animal asparaginyl endopeptidase (aep/vpe/legumain). vpe has been shown to exhibit enzymatic properties similar to that of caspase 1, which is a cysteine protease that mediates the programmed cell death (pcd) pathway in animals. although there is limited sequence identity between vpe an ... | 2015 | 25914711 |
| differential effects of lesion mimic mutants in barley on disease development by facultative pathogens. | lesion mimic mutants display spontaneous necrotic spots and chlorotic leaves as a result of mis-regulated cell death programmes. typically these mutants have increased resistance to biotrophic pathogens but their response to facultative fungi that cause necrotrophic diseases is less well studied. the effect of altered cell death regulation on the development of disease caused by ramularia collo-cygni, fusarium culmorum and oculimacula yallundae was explored using a collection of barley necrotic ... | 2015 | 25873675 |
| interconnection between flowering time control and activation of systemic acquired resistance. | the ability to avoid or neutralize pathogens is inherent to all higher organisms including plants. plants recognize pathogens through receptors, and mount resistance against the intruders, with the help of well-elaborated defense arsenal. in response to some localinfections, plants develop systemic acquired resistance (sar), which provides heightened resistance during subsequent infections. infected tissues generate mobile signaling molecules that travel to the systemic tissues, where they epige ... | 2015 | 25852723 |
| hijacking of the jasmonate pathway by the mycotoxin fumonisin b1 (fb1) to initiate programmed cell death in arabidopsis is modulated by rglg3 and rglg4. | the mycotoxin fumonisin b1 (fb1) is a strong inducer of programmed cell death (pcd) in plants, but its underlying mechanism remains unclear. here, we describe two ubiquitin ligases, ring domain ligase3 (rglg3) and rglg4, which control fb1-triggered pcd by modulating the jasmonate (ja) signalling pathway in arabidopsis thaliana. rglg3 and rglg4 transcription was sensitive to fb1. arabidopsis fb1 sensitivity was suppressed by loss of function of rglg3 and rglg4 and was increased by their overexpre ... | 2015 | 25788731 |