| effect of three nematicides on the growth of some phytopathogenic bacteria and fungi. | the effect of three nematicides, aldicarb, fensulfothion, and phenamiphos at four concentrations (1, 5, 25, and 125 ppm) was tested on the growth of five bacteria, agrobacterium tumefaciens, corynebacterium fascians, erwinia carotovora, pseudomonas solanacearum, and streptomyces scabies and four fungi, fusarium oxysporum f. sp. vasinfectum, fusarium solani, rhizoctonia solani, and sclerotium bataticola. of the bacteria, p. solanacearum was most affected by the chemicals at all concentrations, wh ... | 1977 | 143857 |
| production of 3-acetoxyscirpene-4,15-diol from anguidine (4,15-diacetoxyscirpene-3-ol) by fusarium oxysporum f.sp. vasinfectum. | growing cells of fusarium oxysporum f.sp. vasinfectum (atcc 7808) formed 3-acetoxyscirpene-4,15-diol from anguidine (4,15-diacetoxyscirpene-3-ol) by way of the intermediates triacetoxyscirpene, 3,4-diacetoxyscirpene-15-ol and 3,15-diacetoxyscirpene-4-ol. the new 3-acetoxy analog was found to be less active than anguidine and the other monoacetoxy derivatives when tested against a series of fungal strains and against hela cells in vitro. | 1979 | 453837 |
| vitamin requirements of fusarium oxysporum f. sp. vasinfectum. | the effect of eight water-soluble vitamins on germination, germ-tube extension, growth, and sporulation of fusarium oxysporum schl. f.sp. vasinfectum (atk.) snyder and hansen, was studied. each vitamin was utilized in eight different concentrations. the fungus responded favourably to all of the utilized vitamins in almost all the concentrations where germination, growth, and sporulation were substantially greater than the controls. among the vitamins used, the fungus appeared to be highly sensit ... | 1979 | 543346 |
| [hybrid forms of malate dehydrogenas from fusarium oxysporum f. sp. vasinfectum and from cotton]. | | 1975 | 1149608 |
| detection of fusaric acid in the mycelium and conidia of fusarium oxysporum f. vasinfectum. | | 1968 | 4970752 |
| purification and pattern of action of pectinesterase from fusarium oxysporum f. sp. vasinfectum. | | 1971 | 5544651 |
| molecular characterization of races and vegetative compatibility groups in fusarium oxysporum f. sp. vasinfectum. | restriction fragment length polymorphism (rflp) and vegetative compatibility analyses were undertaken to assess genetic relationships among 52 isolates of fusarium oxysporum f. sp. vasinfectum of worldwide origin and representing race a, 3, or 4 on cotton plants. ten distinct vegetative compatibility groups (vcgs) were obtained, and isolates belonging to distinct races were never in the same vcg. race a isolates were separated into eight vcgs, whereas isolates of race 3 were classified into a si ... | 1994 | 7993090 |
| cell wall synthesis in cotton roots after infection with fusarium oxysporum. the deposition of callose, arabinogalactans, xyloglucans, and pectic components into walls, wall appositions, cell plates and plasmodesmata. | fusarium oxysporum f. sp. vasinfectum penetration hyphae infect living cells in the meristematic zone of cotton (gossypium barbadense l.) roots. we characterized wall modifications induced by the fungus during infection of the protodermis using antibodies against callose, arabinogalactan-proteins, xyloglucan, pectin, polygalacturonic acid and rhamnogalacturonan i in high-pressure frozen, freeze-substituted root tissue. using quantitative immunogold labelling we compared the cell walls before and ... | 1995 | 8580765 |
| united states department of agriculture-agricultural research service studies on polyketide toxins of fusarium oxysporum f sp vasinfectum: potential targets for disease control. | a group of 133 isolates of the cotton wilt pathogen fusarium oxysporum schlecht f sp vasinfectum (atk) sny & hans, representing five races and 20 vegetative compatibility groups within race 1 were used to determine the identity, biosynthetic regulation and taxonomic distribution of polyketide toxins produced by this pathogen. all isolates of f oxysporum f sp vasinfectum produced and secreted the nonaketide naphthazarin quinones, bikaverin and norbikaverin. most isolates of race 1 (previously den ... | 2003 | 12846324 |
| gene expression profile changes in cotton root and hypocotyl tissues in response to infection with fusarium oxysporum f. sp. vasinfectum. | microarray analysis of large-scale temporal and tissue-specific plant gene expression changes occurring during a susceptible plant-pathogen interaction revealed different gene expression profile changes in cotton root and hypocotyl tissues. in hypocotyl tissues infected with fusarium oxysporum f. sp. vasinfectum, increased expression of defense-related genes was observed, whereas few changes in the expression levels of defense-related genes were found in infected root tissues. in infected roots, ... | 2004 | 15195948 |
| colonization and persistence of a plant growth-promoting bacterium pseudomonas fluorescens strain cs85, on roots of cotton seedlings. | pseudomonas fluorescens cs85, which was previously isolated from the rhizosphere of cotton seedlings, acts as both a plant growth-promoting bacterium and a biocontrol agent against cotton pathogens, including rhizoctonia solani, colletotrichum gossypii, fusarium oxysporum f sp. vasinfectum, and verticillium dahliae. strain cs85 was labeled separately with luxab and gusa. the labeled strains were stably maintained and had high levels of expression of the marker genes, luxab and gusa, after succes ... | 2004 | 15381971 |
| [transcriptional differences between a heterokaryon and its segregants of fusarium oxysporum f. sp. vasinfectum]. | in order to elucidate the mechanism of fungal heterokayosis, a wild type strain of fusarium oxysporum f. sp. vasinfectum was isolated from the cotton field in anyang, henan province. through single hyphal-tip isolation, a heterokaryon, ag149, was obtained, and its two different phenotypic segregants, ag149-i and ag149-iii, were separated from the mutated sectors on colony of the heterokaryon. they have remarkable differences on color of colony, morphology of hypha and pathogenicity. after analyz ... | 2004 | 15473307 |
| the use of natural bio-agents for the control of cotton phytopathogens. | the use of natural antagonists as means of pre-sowing seed treatment showed high biological efficacy by improving seed germination, growth and productivity of cotton plants, and by decreasing infection by major cotton pathogens: xanthomonas malvacearum, rhizoctonia solani, fusarium oxysporum f. sp. vasinfectum, verticillium dahliae. studies of anti-microbial properties of antagonists revealed significant inhibitory activity of bacillus subtilis strains and their metabolites against cotton pathog ... | 2001 | 15954583 |
| the effect of gossypium c-genome chromosomes on resistance to fusarium wilt in allotetraploid cotton. | fusarium oxysporum f. sp. vasinfectum (fov) has the potential to become the most economically significant pathogen of cotton in australia. although the levels of resistance present in the new commercial cultivars have improved significantly, they are still not immune and cotton breeders continue to look for additional sources of resistance. the native australian gossypium species represent an alternative source of resistance because they could have co-evolved with the indigenous fov pathogens. f ... | 2007 | 17632700 |
| the in vitro effect of gossypol and its interaction with salts on conidial germination and viability of fusarium oxysporum sp. vasinfectum isolates. | to assess the effect of different concentrations of gossypol (0, 2, 4, 10 and 20 mg l(-1)) in combination with nacl and na(2)so(4) (20 ms cm(-1)) on the conidial germination and viability of fusarium oxysporum f.sp. vasinfectum (fov). | 2007 | 18045422 |
| antifungal activity of some diaryl ethers. | several diaryl ethers were synthesized and tested in vitro against seven phytopathogenic fungi, namely fusarium graminearum, alternaria alternate, helminthosporium sorokinianum, pyricularia oryzae, fusarium oxysporum f. sp. vasinfectum, fusarium oxysporum f. sp. cucumarinum and alternaria brassicae. compared to a commercial agricultural fungicide, hymexazol, especially compounds a, b, e, g and k were found to be more effective at 50 mug/ml against f. graminearum, f. oxysporum f. sp. vasinfectum ... | 2007 | 18057754 |
| synthesis of acyl thiourea derivatives of chitosan and their antimicrobial activities in vitro. | three different acyl thiourea derivatives of chitosan (cs) were synthesized and their structures were characterized by ft-ir spectroscopy and elemental analysis. the antimicrobial behaviors of cs and its derivatives against four species of bacteria (escherichia coli, pseudomonas aeruginosa, staphylococcus aureus, and sarcina) and four crop-threatening pathogenic fungi (alternaria solani, fusarium oxysporum f. sp. vasinfectum, colletotrichum gloeosporioides (penz.) saec, and phyllisticta zingiber ... | 2008 | 18083151 |
| the plant defensin, nad1, enters the cytoplasm of fusarium oxysporum hyphae. | the plant defensin, nad1, from the flowers of nicotiana alata displays potent antifungal activity against a variety of agronomically important filamentous fungi including fusarium oxysporum f. sp. vasinfectum (fov). to understand the mechanism of this antifungal activity, the effect of nad1 on fov fungal membranes and the location of nad1 in treated hyphae was examined using various fluorescence techniques. nad1 permeabilized fungal plasma membranes via the formation of an aperture with an inter ... | 2008 | 18339623 |
| a fusarium wilt resistance gene in gossypium barbadense and its effect on root-knot nematode-wilt disease complex. | abstract fusarium wilt, caused by the soilborne pathogen fusarium oxysporum f. sp. vasinfectum race 1, is a vascular disease in cotton (gossypium spp.), and is a component of a disease complex with root-knot nematodes (meloidogyne incognita). genetic analysis of two interspecific crosses (g. barbadense pima s-7 x g. hirsutum acala nemx and pima s-7 x acala sj-2) showed that one major gene (designated fov1) with allele dosage effect conferred resistance to f. oxysporum f. sp. vasinfectum race 1 i ... | 2006 | 18943146 |
| evolution of fusarium oxysporum f. sp. vasinfectum races inferred from multigene genealogies. | abstract fusarium wilt of cotton is a serious fungal disease responsible for significant yield losses throughout the world. evolution of the causal organism fusarium oxysporum f. sp. vasinfectum, including the eight races described for this specialized form, was studied using multigene genealogies. partial sequences of translation elongation factor (ef-1alpha), nitrate reductase (nir), phosphate permase (pho), and the mitochondrial small subunit (mtssu) rdna were sequenced in 28 isolates of f. o ... | 2001 | 18943339 |
| high genetic diversity among strains of fusarium oxysporum f. sp. vasinfectum from cotton in ivory coast. | abstract seventeen isolates of fusarium oxysporum f. sp. vasinfectum from the ivory coast were characterized using vegetative compatibility group (vcg), restriction fragment length polymorphism of the ribosomal inter-genic spacer region (igs), and mating type (mat) idiomorph, and compared with a worldwide collection of the pathogen containing all available reference strains. some of the isolates were identical to known reference strains for all three traits, whereas others had previously unknown ... | 2005 | 18943549 |
| evolution of virulence in fusarium oxysporum f. sp. vasinfectum using serial passage assays through susceptible cotton. | fifty strains of fusarium oxysporum, recovered from rhizosphere soil around native gossypium species and found to be mildly virulent on cotton (gossypium hirsutum), were used to assay the propensity for evolution of virulence using serial passage assays through cotton. only one lineage a strain, 2613, successfully completed 10 successive passages, while all others lost the ability to cause foliar disease symptoms at various stages during this process. based on 46 amplified fragment length polymo ... | 2008 | 18944080 |
| inoculum densities of fusarium oxysporum f. sp. vasinfectum and meloidogyne incognita in relation to the development of fusarium wilt and the phenology of cotton plants (gossypium hirsutum). | abstract development of fusarium wilt in upland cotton (gossypium hirsutum) usually requires infections of plants by both meloidogyne incognita and fusarium oxysporum f. sp. vasinfectum. in this study, the soil densities of m. incognita and f. oxysporum f. sp. vasinfectum and the incidence of fusarium wilt in three field sites were determined in 1982-1984. multiple regression analysis of percent incidence of fusarium wilt symptoms on population densities of m. incognita and f. oxysporum f. sp. v ... | 1997 | 18945178 |
| interaction of rotylenchulus reniformis with seedling disease pathogens of cotton. | the impact of 10 fusarium species in concomitant association with rotylenchulus reniformis on cotton seedling disease was examined under greenhouse conditions. in experiment 1, fungal treatments consisted of fusarium chlamydosporum, f. equiseti, f. lateritium, f. moniliforme, f. oxysporum, f. oxysporum f.sp. vasinfectum, f. proliferatum, f. semitectum, f. solani, and f. sporotrichioides; rhizoctonia solani; and thielaviopsis basicola. the experimental design was a 2 x 14 factorial consisting of ... | 2004 | 19262802 |
| interaction of population levels of fusarium oxysporum f. sp. vasinfectum and meloidogyne incognita on cotton. | in autoclaved greenhouse soil without fusarium oxysporum f. sp. vasinfectum, meloidogyne incognita did not cause leaf or vascular discoloration of 59-day-old cotton plants. plants had root galls with as few as 50 meloidogyne larvae per plant. root galling was directly proportional to the initial nematode population level. fusarium wilt symptoms occurred without nematodes with 77,000 fungus propagules or more per gram of soil. as few as 50 meloidogyne larvae accompanying 650 fungus propagules cau ... | 1979 | 19305546 |
| interactions of concomitant species of nematodes and fusarium oxysporum f. sp. vasinfectum on cotton. | meloidogyne incognita, hoplolaintus galeatus, and north carolina and georgia populations of belonolaimus longicaudatus were introduced singly and in various combinations with fusarium oxysporum f. sp. vasinfectum on wilt-susceptible 'rowden' cotton. of all the nematodes, the combination of the n. c. population of b. longicaudatus with fusarium promoted greatest wilt development. h. galeatus had no effect on wilt. with fusarium plus m. incognito or b. longicaudatus, high nematode levels promoted ... | 1976 | 19308201 |
| the influence of trichoderma harzianum on the root-knot fusarium wilt complex in cotton. | wilt-susceptible cultivar 'rowden' cotton was inoculated wilh meloidogyne incognita (n), trichoderma harzianum (t), and fusarium oxysporum f. sp. vasinfectum (f) alone and in all combinations in various time sequences. plants inoculated with f alone or in combination with t did not develop wilt, simultaneous inoculation of 7-day-old seedlings with all three organisms (ntf) produced earliest wilt. however, plants receiving nematodes at 7 days and fusarium and trichoderma at 2 or 4 weeks later (n- ... | 1976 | 19308202 |
| population dynamics and identification of endophytic bacteria antagonistic toward plant-pathogenic fungi in cotton root. | the antagonistic potentials of endophytic bacteria isolated from the roots of six cotton cultivars at different developmental stages were determined in vitro toward three pathogens: verticillium dahliae kleb v107 and v396 and fusarium oxysporum f.sp. vasinfectum (f108). the populations of antagonistic endophytic bacteria (aeb) toward v107, v396, and f108 at the flowering and maturation stages were significantly higher than those at the seedling stage were. more aeb were found to be antagonistic ... | 2010 | 19669227 |
| resistance against various fungal pathogens and reniform nematode in transgenic cotton plants expressing arabidopsis npr1. | cotton is an economically important crop worldwide that suffers severe losses due to a wide range of fungal/bacterial pathogens and nematodes. given its susceptibility to various pathogens, it is important to obtain a broad-spectrum resistance in cotton. resistance to several fungal and bacterial diseases has been obtained by overexpressing the non-expressor of pathogenesis-related genes-1 (npr1) in various plant species with apparently minimal or no pleiotropic effects. we examined the efficacy ... | 2010 | 20151323 |
| ghwrky3, a novel cotton (gossypium hirsutum l.) wrky gene, is involved in diverse stress responses. | wrky proteins play important roles in plant defense responses. in the present study, a novel wrky gene, nominated as ghwrky3, was isolated from cotton (gossypium hirsutum l.). the full-length cdna of ghwrky3 is 1,705 bp in length and encodes a protein with 507 amino acids containing two typical wrky domains and two zinc finger motifs. amino acid sequence alignment revealed that ghwrky3 shares a high degree of identity with other higher plant wrky proteins. the subcellular localization assay indi ... | 2011 | 20238169 |
| fusarium wilt (fusarium oxysporum f. sp. vasinfectum) genes expressed during infection of cotton (gossypium hirsutum)dagger. | summary we sought to identify fusarium oxysporum f. sp. vasinfectum (fov) genes that may be associated with pathogenicity. initially we utilized microarray and q-pcr technology to identify fov genes expressed in root and hypocotyl tissues during a compatible infection of cotton. we identified 218 fungal clones representing 174 fov non-redundant genes as expressed in planta. the majority of the expressed sequences were expressed in infected roots, with only six genes detected in hypocotyl tissue. ... | 2006 | 20507430 |
| synthesis and antifungal activities of some 2,6-bis-(un)substituted phenoxymethylpyridines. | several 2,6-bis-(un)substituted phenoxymethylpyridines were synthesized and evaluated in vitro against fusarium graminearum, helminthosporium sorokinianum, alternaria brassicae, alternaria alternata, and fusarium oxysporum f. sp. vasinfectum. among all derivatives, compound 3a exhibited a broad-spectrum antifungal activity against the five phytopathogenic fungi. | 2010 | 20737909 |
| antifungal activities of some indole derivatives. | nine indole derivatives were evaluated in vitro against fusarium graminearum, alternaria alternata, helminthosporium sorokinianum, pyricularia oryzae, fusarium oxysporum f. sp. vasinfectum, fusarium oxysporum f. sp. cucumarinum, and alternaria brassicae. most of the compounds were found to possess antifungal activities. especially compounds 2, 5, 8, and 9 exhibited broad-spectrum antifungal activities against the above-mentioned seven phytopathogenic fungi, and showed more potent activities than ... | 2010 | 20737910 |
| permeabilization of fungal hyphae by the plant defensin nad1 occurs through a cell wall-dependent process. | the antifungal activity of the plant defensin nad1 involves specific interaction with the fungal cell wall, followed by permeabilization of the plasma membrane and entry of nad1 into the cytoplasm. prior to this study, the role of membrane permeabilization in the activity of nad1, as well as the relevance of cell wall binding, had not been investigated. to address this, the permeabilization of fusarium oxysporum f. sp. vasinfectum hyphae by nad1 was investigated and compared with that by other a ... | 2010 | 20861017 |
| evaluation of antimicrobial activity of endophytic fungi from camptotheca acuminata (nyssaceae). | agricultural research of plant-derived endophytic fungi has grown in recent decades. we isolated 26 endophytic fungi from the leaves, stems and fruits of "the tree of life", camptotheca acuminata, and tested them for antimicrobial activities based on growth inhibition measurements in a modified agar diffusion method. fermentation broths from most of the isolates exhibited antifungal activity and 50% exhibited antibacterial activity; some of them also exhibited strong broad-spectrum antimicrobial ... | 2010 | 21038296 |
| functional characterization of the recombinant antimicrobial peptide trx-ace-amp1 and its application on the control of tomato early blight disease. | ace-amp1 is a potent antifungal peptide found in onion (allium cepa) seeds with sequence similarity to plant lipid transfer proteins. transgenic plants over-expressing ace-amp1 gene have enhanced disease resistance to some fungal pathogens. however, mass production in heterologous systems and in vitro application of this peptide have not been reported. in this study, ace-amp1 was highly expressed in a prokaryotic escherichia coli system as a fusion protein. the purified protein inhibited the gro ... | 2011 | 21380518 |
| nuclear magnetic resonance (nmr) studies on the biosynthesis of fusaric acid from fusarium oxysporum f. sp. vasinfectum. | fusarium oxysporum is a fungal pathogen that attacks many important plants. uniquely pathogenic strains of f. oxysporum f. sp. vasinfectum were inadvertently imported into the united states on live cottonseed for dairy cattle feed. these strains produce exceptionally high concentrations of the phytotoxin fusaric acid. thus, fusaric acid may be a critical component in the pathogenicity of these biotypes. this study investigated the biosynthesis of fusaric acid using (13)c-labeled substrates inclu ... | 2011 | 21495723 |
| mapping fusarium wilt race 1 resistance genes in cotton by inheritance, qtl and sequencing composition. | knowledge of the inheritance of disease resistance and genomic regions housing resistance (r) genes is essential to prevent expanding pathogen threats such as fusarium wilt [fusarium oxysporum f.sp. vasinfectum (fov) atk. sny & hans] in cotton (gossypium spp.). we conducted a comprehensive study combining conventional inheritance, genetic and quantitative trait loci (qtl) mapping, qtl marker-sequence composition, and genome sequencing to examine the distribution, structure and organization of di ... | 2011 | 21533837 |
| Enhancing plant disease suppression by Burkholderia vietnamiensis through chromosomal integration of Bacillus subtilis chitinase gene chi113. | Burkholderia vietnamiensis P418 is a plant growth-promoting rhizobacteria. A chitinase gene from Bacillus subtilis was cloned and stably integrated into the chromosome of using the transposon delivery vector, pUTkm1. Chitinase activity was detected in recombinant P418-37 but not in wild type P418. Recombinant P418-37 retained the in vitro growth rate, N(2)-fixation and phosphate and potassium-solubilizing characteristics of the wild type. P418-37 significantly (P < 0.05) inc ... | 2011 | 21972146 |