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glutathione s-transferase slgste1 in spodoptera litura may be associated with feeding adaptation of host plants.spodoptera litura is polyphagous pest insect and feeds on plants of more than 90 families. in this study the role of glutathione s-transferase epilson 1 (slgste1) in s. litura in detoxification was examined. this gene was up-regulated in the midgut of s. litura at the transcriptional and protein levels when the insect fed on brassica juncea or diet containing phytochemicals such as indole-3-carbinol and allyl-isothiocyanate that are metabolic products of sinigrin and glucobrassicin in b. juncea. ...201626631599
ipomoea batatas (convolvulaceae)-mediated synthesis of silver nanoparticles for controlling mosquito vectors of aedes albopictus, anopheles stephensi, and culex quinquefasciatus (diptera:culicidae).we proposed an effective and eco-friendly control of dengue, malaria, and filariasis-causing vectors. we tested ipomoea batatas leaves-mediated silver nanoparticles (agnps) against first to fourth instar larvae and adults of aedes albopictus, anopheles stephensi, and culex quinquefasciatus at different concentrations. the synthesized agnps showed broad spectrum of larvicidal and adulticidal effects after 48 h of exposure. the characterization of synthesized agnps was done using various spectral ...201627929364
the trade in african medicinal plants in matonge-ixelles, brussels (belgium).maintaining cultural identity and preference to treat cultural bound ailments with herbal medicine are motivations for migrants to continue using medicinal plants from their home country after moving to europe and the usa. as it is generally easier to import exotic food than herbal medicine, migrants often shift to using species that double as food and medicine. this paper focuses on the trade in african medicinal plants in a congolese neighborhood in brussels (belgium). what african medicinal p ...201628179733
dietary patterns and retinal vascular calibre in children and adolescents with type 1 diabetes.to examine the association between dietary patterns and retinal vascular calibre in children and adolescents with type 1 diabetes.201626749006
a genome-wide bac-end sequence survey provides first insights into sweetpotato (ipomoea batatas (l.) lam.) genome composition.sweetpotato, ipomoea batatas (l.) lam., is an important food crop widely grown in the world. however, little is known about the genome of this species because it is a highly heterozygous hexaploid. gaining a more in-depth knowledge of sweetpotato genome is therefore necessary and imperative. in this study, the first bacterial artificial chromosome (bac) library of sweetpotato was constructed. clones from the bac library were end-sequenced and analyzed to provide genome-wide information about thi ...201627871234
characterization of non-coding dna satellites associated with sweepoviruses (genus begomovirus, geminiviridae) - definition of a distinct class of begomovirus-associated satellites.begomoviruses (family geminiviridae) are whitefly-transmitted, plant-infecting single-stranded dna viruses that cause crop losses throughout the warmer parts of the world. sweepoviruses are a phylogenetically distinct group of begomoviruses that infect plants of the family convolvulaceae, including sweet potato (ipomoea batatas). two classes of subviral molecules are often associated with begomoviruses, particularly in the old world; the betasatellites and the alphasatellites. an analysis of swe ...201626925037
complete genome sequences of the potyvirus sweet potato virus 2 from east timor and australia.we present here the first complete genome sequences of sweet potato virus 2 (spv2) from sweet potato in australia and east timor, and compare these with five complete spv2 genome sequences from south korea and one each from spain and the united states. both were closely related to spv2 genomes from south korea, spain, and the united states.201627257208
deep sequencing reveals the complete genome sequence of sweet potato virus g from east timor.we present the first complete sweet potato virus g (spvg) genome from sweet potato in east timor and compare it with seven complete spvg genomes from south korea (three), taiwan (two), argentina (one), and the united states (one). it most resembles the genomes from the united states and south korea.201627609925
the modulatory effect of anthocyanins from purple sweet potato on human intestinal microbiota in vitro.in order to investigate the modulatory effect of purple sweet potato anthocyanins (pspas) on human intestinal microbiota, pspas were prepared by column chromatography and their influence on intestinal microbiota was analyzed by monitoring the bacterial populations and analyzing short-chain fatty acid (scfa) concentrations at different time points. the numbers (log10 cell/ml) of bifidobacterium and lactobacillus/enterococcus spp., bacteroides-prevotella, clostridium histolyticum, and total bacter ...201626975278
complete genome sequence of klebsiella pneumoniae yh43.we report here the complete genome sequence ofklebsiella pneumoniaestrain yh43, isolated from sweet potato. the genome consists of a single circular chromosome of 5,520,319 bp in length. it carries 8 copies of rrna operons, 86 trna genes, 5,154 protein-coding genes, and thenifgene cluster for nitrogen fixation.201627081127
carotenoid analysis of sweetpotato ipomoea batatas and functional identification of its lycopene β- and ε-cyclase genes.sweetpotato ipomoea batatas is known as a hexaploid species. here, we analyzed carotenoids contained in the leaves and tubers of sweetpotato cultivars 'white star' (ws) and w71. these cultivars were found to contain several carotenoids unique to sweetpotato tubers such as β-carotene-5,6,5',8'-diepoxide and β-carotene-5,8-epoxide. next, we isolated two kinds of carotene cyclase genes that encode lycopene β- and ε-cyclases from the ws and w71 leaves, by rt-pcr and subsequent race. two and three ly ...201627564699
characterization and development of est-ssr markers in sweet potato (ipomoea batatas (l.) lam).in this study, a cdna library was constructed from the total rna of sweet potato leaves. a total of 789 copies of the cdna were cloned in escherichia coli by employing the pgem-t easy vector. sequencing was carried out by solgent co. (korea). as many as 579 expressed sequence tag-simple sequence repeat (est-ssr) markers were designed (73.38%) from the known cdna nucleotide base sequences. the lengths of the developed est-ssr markers ranged from 100 to 499 bp (average length 238 bp). their motif ...201628330315
isolation and characterization of cdnas and genomic dnas encoding adp-glucose pyrophosphorylase large and small subunits from sweet potato.sweet potato [ipomoea batatas (l.) lam.], the world's seventh most important food crop, is also a major industrial raw material for starch and ethanol production. in the plant starch biosynthesis pathway, adp-glucose pyrophosphorylase (agpase) catalyzes the first, rate-limiting step and plays a pivotal role in regulating this process. in spite of the importance of sweet potato as a starch source, only a few studies have focused on the molecular aspects of starch biosynthesis in sweet potato and ...201626499957
preparation of slowly digestible sweet potato daeyumi starch by dual enzyme modification.sweet potato daeyumi starch was dually modified using glycogen branching enzyme (be) from streptococcus mutans and amylosucrase (as) from neisseria polysaccharea to prepare slowly digestible starch (sds). dually modified starches had higher sds and resistant starch (rs) contents than control starch. the branched chain length distributions of the be-modified starches indicated an increase in short side-chains [degree of polymerization (dp)≤12] compared with native starch. as treatment of the be-m ...201627083356
effects of lactobacillus formosensis s215(t) and lactobacillus buchneri on quality and in vitro ruminal biological activity of condensed tannins in sweet potato vines silage.this study investigated the influence of two microbial inoculants; lactobacillus formosensis and lactobacillus buchneri on fermentation quality, chemical composition, aerobic stability and in vitro ruminal biological activity of condensed tannins in sweet potato vines silage.201627541959
sweet potato nac transcription factor, ibnac1, upregulates sporamin gene expression by binding the swre motif against mechanical wounding and herbivore attack.sporamin is a tuberous storage protein with trypsin inhibitory activity in sweet potato (ipomoea batatas lam.), which accounts for 85% of the soluble protein in tubers. it is constitutively expressed in tuberous roots but is expressed in leaves only after wounding. thus far, its wound-inducible signal transduction mechanisms remain unclear. in the present work, a 53-bp dna region, sporamin wound-response cis-element (swre), was identified in the sporamin promoter and was determined to be respons ...201626996980
a novel cys2/his2 zinc finger protein gene from sweetpotato, ibzfp1, is involved in salt and drought tolerance in transgenic arabidopsis.ibzfp1, encoding a cys 2/his 2 zinc finger protein gene from sweetpotato, enhances salt and drought tolerance in transgenic arabidopsis by regulating aba signaling pathway, proline biosynthesis, stress responses and ros scavenging. in plants, cys2/his2 zinc finger proteins play important roles in regulating the growth and development or responses to abiotic stresses. in this study, a novel cys2/his2 zinc finger protein gene, named ibzfp1, was isolated from drought-tolerant sweetpotato [ipomoea b ...201626691387
viral rnase3 co-localizes and interacts with the antiviral defense protein sgs3 in plant cells.sweet potato chlorotic stunt virus (spcsv; family closteroviridae) encodes a class 1 rnase iii endoribonuclease (rnase3) that suppresses post-transcriptional rna interference (rnai) and eliminates antiviral defense in sweetpotato plants (ipomoea batatas). for rnai suppression, rnase3 cleaves double-stranded small interfering rnas (ds-sirna) and long dsrna to fragments that are too short to be utilized in rnai. however, rnase3 can suppress only rnai induced by sense rna. sense-mediated rnai invol ...201627391019
natural antifungal compounds from the peels of ipomoea batatas lam.three antifungal compounds have been isolated for the first time from the peels of ipomoea batatas lam. their structures were established on the basis of 1d and 2d nmr spectra data as well as esi-ms and ir analysis. urs-13(18)-ene-3β-yl acetate was found to possess a weak activity against sporothrix schenckii and trichophyton metagrophytes fungi with an mic value of 50 μg/ml each. stigmasterol and 3-friedelanol were equally active against t. metagrophytes.201626595108
mixed infections of four viruses, the incidence and phylogenetic relationships of sweet potato chlorotic fleck virus (betaflexiviridae) isolates in wild species and sweetpotatoes in uganda and evidence of distinct isolates in east africa.viruses infecting wild flora may have a significant negative impact on nearby crops, and vice-versa. only limited information is available on wild species able to host economically important viruses that infect sweetpotatoes (ipomoea batatas). in this study, sweet potato chlorotic fleck virus (spcfv; carlavirus, betaflexiviridae) and sweet potato chlorotic stunt virus (spcsv; crinivirus, closteroviridae) were surveyed in wild plants of family convolvulaceae (genera astripomoea, ipomoea, hewittia ...201628005969
complete genome sequences of the carlavirus sweet potato chlorotic fleck virus from east timor and australia.we present here the first complete genome sequences of sweet potato chlorotic fleck virus (spcfv) from sweet potato in australia and east timor, and we compare these with four complete spcfv genomes from south korea and one from uganda. the australian, east timorese, south korean, and ugandan genomes differed considerably from each other.201627231359
the p1n-pispo trans-frame gene of sweet potato feathery mottle potyvirus is produced during virus infection and functions as an rna silencing suppressor.the positive-sense rna genome of sweet potato feathery mottle virus (spfmv) (genus potyvirus, family potyviridae) contains a large open reading frame (orf) of 3,494 codons translatable as a polyprotein and two embedded shorter orfs in the -1 frame: pispo, of 230 codons, and pipo, of 66 codons, located in the p1 and p3 regions, respectively. pispo is specific to some sweet potato-infecting potyviruses, while pipo is present in all potyvirids. in spfmv these two extra orfs are preceded by conserve ...201626792740
infectivity, effects on helper viruses and whitefly transmission of the deltasatellites associated with sweepoviruses (genus begomovirus, family geminiviridae).begomoviruses (family geminiviridae) are whitefly-transmitted viruses with single-stranded dna genomes that are frequently associated with dna satellites. these satellites include non-coding satellites, for which the name deltasatellites has been proposed. although the first deltasatellite was identified in the late 1990s, little is known about the effects they have on infections of their helper begomoviruses. recently a group of deltasatellites were identified associated with sweepoviruses, a g ...201627453359
chemical composition, nitrogen degradability and in vitro ruminal biological activity of tannins in vines harvested from four tropical sweet potato (ipomoea batatas l.) varieties.this study investigated the potential of vines from four sweet potato varieties (tia nong 57, tia nong 66, ligwalagwala and kenya) as alternative feed resources for ruminant livestock. the chemical composition [neutral detergent fibre (ndf), acid detergent fibre (adf), crude protein (cp) and acid detergent insoluble nitrogen (adin)], in vitro ruminal nitrogen (n) degradability and in vitro ruminal biological activity of tannins in the vines, harvested at 70 and 110 days after planting (dap), wer ...201625882673
biotransformation of anthocyanins from two purple-fleshed sweet potato accessions in a dynamic gastrointestinal system.cooked, milled purple-fleshed sweet potato (pfsp) accessions, pm09.812 and pm09.960, underwent digestion in a dynamic human gastrointestinal (gi) model that simulates gut digestive conditions to study the bioaccessibility and biotransformation of anthocyanins. matrix-assisted laser desorption ionization time-of-flight mass spectrometry showed accession-dependent variations in anthocyanin release and degradation. after 24h, more anthocyanin species were detected in the small intestinal vessel rel ...201626304335
orange protein has a role in phytoene synthase stabilization in sweetpotato.carotenoids have essential roles in light-harvesting processes and protecting the photosynthetic machinery from photo-oxidative damage. phytoene synthase (psy) and orange (or) are key plant proteins for carotenoid biosynthesis and accumulation. we previously isolated the sweetpotato (ipomoea batatas) or gene (ibor), which is involved in carotenoid accumulation and salt stress tolerance. the molecular mechanism underlying ibor regulation of carotenoid accumulation was unknown. here, we show that ...201627633588
breeding erect plant type sweetpotato lines using cross breeding and gamma-ray irradiation.few sweetpotato (ipomoea batatas lam.) cultivars with erect plant type are available despite their advantages over spreading type, such as simplicity of cultivation and ability to adapt to limited space. one of the reasons is insufficiency of their agronomic characteristics for table use. so, it is important to overcome these drawbacks of er-type lines. we attempted to breed new erect plant type sweetpotato lines having good agronomic traits using cross breeding and mutation breeding with gamma- ...201627436957
an analytical pipeline to compare and characterise the anthocyanin antioxidant activities of purple sweet potato cultivars.purple sweet potato (ipomoea batatas l.) is rich in anthocyanin pigments, which are valuable constituents of the human diet. techniques to identify and quantify anthocyanins and their antioxidant potential are desirable for cultivar selection and breeding. in this study, we performed a quantitative and qualitative chemical analysis of 30 purple sweet potato (psp) cultivars, using various assays to measure reducing power radical-scavenging activities, and linoleic acid autoxidation inhibition act ...201626471525
de novo sequencing and comprehensive analysis of the mutant transcriptome from purple sweet potato (ipomoea batatas l.).purple sweet potatoes, rich in anthocyanin, have been widely favored in light of increasing awareness of health and food safety. in this study, a mutant of purple sweet potato (white peel and flesh) was used to study anthocyanin metabolism by high-throughput rna sequencing and comparative analysis of the mutant and wild type transcriptomes. a total of 88,509 unigenes ranging from 200nt to 14,986nt with an average length of 849nt were obtained. unigenes were assigned to gene ontology (go), cluste ...201626410411
metabolite profiling of dioscorea (yam) species reveals underutilised biodiversity and renewable sources for high-value compounds.yams (dioscorea spp.) are a multispecies crop with production in over 50 countries generating ~50 mt of edible tubers annually. the long-term storage potential of these tubers is vital for food security in developing countries. furthermore, many species are important sources of pharmaceutical precursors. despite these attributes as staple food crops and sources of high-value chemicals, dioscorea spp. remain largely neglected in comparison to other staple tuber crops of tropical agricultural syst ...201627385275
the effect of partial substitution of roasted soybean seed with graded levels of sweet potato (ipomoea batatas) leaf meal on growth performances and carcass characteristics of broiler chickens.this study was designed to assess the effects of partial substitution of roasted soybean seed with sweet potato (ipomoea batatas) leaf meal (splm) on growth performances and carcass components of broiler chickens. the experiment was a completely randomized design consisting of five dietary treatments replicated four times with ten chicks each. the control diet (treatment 1, t1) contained roasted soybean seed as the major protein source without splm and treatment diets containing splm at the leve ...201627383801
characterization of secondary metabolites from purple ipomoea batatas leaves and their effects on glucose uptake.ipomoea batatas has long been used in folk medicine for the treatment of hyperglycemia or as a food additive for the prevention of type 2 diabetes. however, neither the plant extract nor its active components have been evaluated systematically. in this work four crude extracts, including n-hexane- (ibh), 95% meoh- (ibm), n-buoh- (ibb), and h₂o-soluble (ibw) fractions, were prepared by fractionation of a methanolic extract of purple i. batatas leaves. twenty-four pure compounds 1-24 were then iso ...201627338312
suppression of reproductive characteristics of the invasive plant mikania micrantha by sweet potato competition.as a means of biologically controlling mikania micrantha h.b.k. in yunnan, china, the influence of sweet potato [ipomoea batatas (l.) lam.] on its reproductive characteristics was studied. the trial utilized a de wit replacement series incorporating six ratios of sweet potato and m. micrantha plants in 25 m(2) plots over 2 years.201627323798
plant-growth regulators alter phytochemical constituents and pharmaceutical quality in sweet potato (ipomoea batatas l.).sweet potato (ipomoea batatas l.) is one of the most important consumed crops in many parts of the world because of its economic importance and content of health-promoting phytochemicals.201627234523
antioxidants and α-glucosidase inhibitors from ipomoea batatas leaves identified by bioassay-guided approach and structure-activity relationships.sweet potato (ipomoea batatas) leaf (spl) is an underused commercial vegetable with considerable bio-activities. by means of dpph scavenging ability and α-glucosidase inhibitory oriented isolation, 9 and 7 compounds were isolated and identified, respectively. among them, trans-n-(p-coumaroyl)tyramine (1), trans-n-feruloyltyramine (2), cis-n-feruloyltyramine (3), 4,5-feruloylcourmaoylquinic acid (8), caffeic acid ethyl ester (10), 7-hydroxy-5-methoxycoumarin (11), 7,3'-dimethylquercetin (13) and ...201627132824
comparison of proteomic and metabolomic profiles of two contrasting ecotypes of sweetpotato (ipomoea batata l.).sweetpotato has long been acknowledged as a significant contributor of global caloric needs, which continues to be of remarkable economic value. it is an important staple and emergency food in many countries and its annual world production hovers to about 130 million tons. the tubers act as sink and compete for the available photoassimilates eventually leading to the acquisition of nutrients and phytochemicals. differential display of genes or gene-products, and metabolites causes differences in ...201626996463
development and identification of ssr markers associated with starch properties and β-carotene content in the storage root of sweet potato (ipomoea batatas l.).sweet potato (ipomoea batatas l.) is a nutritious food crop and, based on the high starch content of its storage root, a potential bioethanol feedstock. enhancing the nutritional value and starch quantity of storage roots are important goals of sweet potato breeding programs aimed at developing improved varieties for direct consumption, processing, and industrial uses. however, developing improved lines of sweet potato is challenging due to the genetic complexity of this plant and the lack of ge ...201626973669
signal transduction and regulation of ibpreprohypsys in sweet potato.hydroxyproline-rich glycopeptides (hypsys) are small signalling peptides containing 18-20 amino acids. the expression of ibpreprohypsys, encoding the precursor of ibhypsys, was induced in sweet potato (ipomoea batatas cv. tainung 57) through wounding and ibhypsys treatments by using jasmonate and h2 o2 . transgenic sweet potatoes overexpressing (oe) and silencing [rna interference (rnai)] ibpreprohypsys were created. the expression of the wound-inducible gene for ipomoelin (ipo) in the local and ...201626924170
effect of including sweet potato (ipomoea batatas lam) meal in finishing pig diets on growth performance, carcass traits and pork quality.the partial replacement of a commercial concentrate at 10-20% and 15-30% (the first percentage of each dietary treatment corresponded to weeks 1-3 and the second to weeks 4-7 of the experiment, respectively) by sweet potato meal (spm; 70% foliage: 30% roots) was evaluated for growth performance, carcass yield, instrumental and sensory pork quality using 36 commercial crossbred pigs (56.8 ± 1.3 kg initial body weight). three dietary treatments were compared in a randomized complete block design. ...201626786836
a novel sweet potato potyvirus open reading frame (orf) is expressed via polymerase slippage and suppresses rna silencing.the single-stranded, positive-sense rna genome of viruses in the genus potyvirus encodes a large polyprotein that is cleaved to yield 10 mature proteins. the first three cleavage products are p1, hcpro and p3. an additional short open reading frame (orf), called pipo, overlaps the p3 region of the polyprotein orf. four related potyviruses infecting sweet potato (ipomoea batatas) are predicted to contain a third orf, called pispo, which overlaps the 3' third of the p1 region. recently, pipo has b ...201626757490
altered phenylpropanoid metabolism in the maize lc-expressed sweet potato (ipomoea batatas) affects storage root development.there is no direct evidence of the effect of lignin metabolism on early storage root development in sweet potato. in this study, we found that heterologous expression of the maize leaf color (lc) gene in sweet potato increased anthocyanin pigment accumulation in the whole plant and resulted in reduced size with an increased length/width ratio, low yield and less starch content in the early storage roots. rt-pcr analysis revealed dramatic up-regulation of the genes involved in the lignin biosynth ...201626727353
effect of drying conditions on properties, pigments and antioxidant activity retentions of pretreated orange and purple-fleshed sweet potato flours.pigmented sweet potatoes (sps) are outstanding sources of anthocyanin, β-carotene and other color-related phytonutrients. however, fresh sp roots are highly perishable and difficult to store. to reduce losses and extend their uses, fresh sp could be converted into flour. sp cultivars with deep purple (phichit 65-3) and orange-fleshed (t101) colors newly developed in thailand were studied. the influence of drying methods on physico-chemical properties, anthocyanin, β-carotene and antioxidant acti ...201627413208
proteomic approach reveals that starch degradation contributes to anthocyanin accumulation in tuberous root of purple sweet potato.a comparative proteomic approach was carried out to investigate anthocyanin biosynthesis in the tuberous roots of yellow sweet potato (ysp) and purple sweet potato (psp) cultivars. more than 800 proteins were reproducibly detected through two-dimensional electrophoresis (2-de), of which 50 proteins with 39 more and 11 less accumulated in psp were identified through matrix-assisted laser desorption ionization-time of flight/time of flight mass spectrometry (maldi-tof/tof-ms). most of the analyzed ...201626957144
carotenoids and β-carotene in orange fleshed sweet potato: a possible solution to vitamin a deficiency.the present study, in line with a plant-food-based approach to address vitamin a deficiency, reports the analysis of total carotenoids, and trans- and cis-β-carotenes, in different varieties of raw and boiled orange-fleshed sweet potatoes (ofsp). carotenoids were isolated using acetone-petroleum ether extraction followed by spectrophotometric determination. trans- and cis-β-carotenes were analyzed by reversed-phase hplc method using a mobile phase containing acetonitrile:methanol:2-propanol in t ...201626776017
a leaf-inhabiting endophytic bacterium, rhodococcus sp. kb6, enhances sweet potato resistance to black rot disease caused by ceratocystis fimbriata.rhodococcus species have become increasingly important owing to their ability to degrade a wide range of toxic chemicals and produce bioactive compounds. here, we report isolation of the rhodococcus sp. kb6, which is a new leaf-inhabiting endophytic bacterium that suppresses black rot disease in sweet potato leaves. we determined the 7.0 mb draft genome sequence of kb6 and have predicted 19 biosynthetic gene clusters for secondary metabolites, including heterobactins, which are a new class of si ...201626767576
partial life history of chrysodeixis includens (lepidoptera: noctuidae) on summer hosts.the soybean looper, chrysodeixis includens (walker) (lepidoptera: noctuidae), is a major defoliating pest of soybeans, glycine max (l.) merrill, in louisiana. however, other alternate host crops in the agroecosystem have the potential to impact c. includens populations. life table statistics of c. includens on four host plants were evaluated. c. includens larvae were fed leaves of three cotton gossypium hirsutum l. cultivars 'dp 143 b2rf,' 'dp 174 rf,' and 'phy 485 wrf'; cowpea vigna unguiculata ...201627375294
purple sweet potato anthocyanin attenuates fat-induced mortality in drosophila melanogaster.a high fat diet induces the accumulation of lipid hydroperoxides (lpo), accelerates the ageing process and causes a greater mortality in drosophila melanogaster. purple sweet potato is rich in antioxidant anthocyanin. the purpose of the present study was to examine if supplementation of purple sweet potato anthocyanin (pspa) could reduce the mortality of fruit flies fed a high-fat diet. results showed that the mean lifespan of fruit flies was shortened from 56 to 35days in a dose-dependent manne ...201627329928
analytical optimization of a phenolic-rich herbal extract and supplementation in fermented milk containing sweet potato pulp.the aims of the present study were to optimize and characterize the phenolic composition of a herbal extract composed of green mate (ilex paraguariensis), clove (syzygium aromaticum), and lemongrass (cymbopogon citratus) and to propose the addition of this polyphenol-rich extract to fermented milks (fm) with/without sweet potato pulp (ipomoea batatas). proximate composition, ph, acidity, instrumental texture profile, total phenolic content (tpc), antioxidant activity (aa) of all formulations wer ...201727979299
sweet potato (ipomoea batatas) attenuates diet-induced aortic stiffening independent of changes in body composition.we hypothesized a sweet potato intervention would prevent high fat diet-induced aortic stiffness, which would be associated with decreased arterial oxidative stress and increased mitochondrial uncoupling. young (8-week old) c57bl/6j mice were randomly divided into 4 groups: low fat (lf, 10% fat), high fat (hf, 60% fat), low fat sweet potato (lfsp, 10% fat containing 260.3 ug/kcal sp), or high fat sweet potato diet (hfsp, 60% fat containing 260.3 ug/kcal sp) for 16 weeks. compared to lf and lfsp, ...201728288284
purple sweet potato attenuate weight gain in high fat diet induced obese mice.purple sweet potato (psp) is widely grown in asia and considered as a healthy vegetable. the objective of the current study was to determine the anti-obesity effect of the psp on high fat diet induced obese c57bl/6j mice. the mice were administrated with high fat diet supplemented with the sweet potato (sp) or psp at the concentration of 15% and 30% for 12 wk, respectively. the results showed that the supplementation of sp or psp at 30% significantly ameliorated high fat diet induced obesity and ...201728135399
degradation of distillery lees (shochu kasu) by cellulase-producing thraustochytrids.single cell oils produced by oleaginous microorganisms have attracted increasing interests as a petroleum alternative energy. marine eukaryotes, thraustochytrids were heterotrophic, and can grow rapidly and accumulate large amount of lipids containing functional fatty acids, such as docosahexaenoic acid (dha) in their cells body. in this investigation, thraustochytrids isolated from marine environment were cultured in the medium containing an industrial waste and an unused resource, distillery l ...201727928143
adding sweet potato vines improve the quality of rice straw silage.rice straw and sweet potato vines are the main by-products of agricultural crops, and their disposal creates problems for the environment in the south of china. in order to establish an easy method for making rice straw silage successfully, experiments were conduct to evaluate fermentation quality and nutritive value of rice straw silages ensiled with or without sweet potato vine. paddy rice straw (pr) and upland rice straw (up) were ensiled alone or with sweet potato vines (sp) by a ratio of 1: ...201727549923
rnai-based gene silencing through dsrna injection or ingestion against the african sweet potato weevil cylas puncticollis (coleoptera: brentidae).rna interference (rnai) technology can potentially serve as a suitable strategy to control the african sweet potato weevil cylas puncticollis (spw), which is a critical pest in sub-saharan africa. important prerequisites are required to use rnai in pest control, such as the presence of an efficient rnai response and the identification of suitable target genes.201727299308
high-throughput microarray mapping of cell wall polymers in roots and tubers during the viscosity-reducing process.viscosity reduction has a great impact on the efficiency of ethanol production when using roots and tubers as feedstock. plant cell wall-degrading enzymes have been successfully applied to overcome the challenges posed by high viscosity. however, the changes in cell wall polymers during the viscosity-reducing process are poorly characterized. comprehensive microarray polymer profiling, which is a high-throughput microarray, was used for the first time to map changes in the cell wall polymers of ...201725757626
effect of feeding sweet-potato condensed distillers solubles on intake and urinary excretion of minerals in japanese black steers.four japanese black steers (16 months of age) were assigned to a 4 × 4 latin square design to investigate the effect of graded levels of sweet-potato condensed distillers solubles (scds) in their diets on intake and urinary excretion of minerals. the four diets consisted of 0%, 10%, 20% and 30% (dry matter (dm) basis) scds, with scds replacing commercial concentrate (cc). intake of k, cl, s, p and mg increased linearly with increasing scds content. urinary ph increased linearly with increasing d ...201727071727
improvement for agronomically important traits by gene engineering in sweetpotato.sweetpotato is the seventh most important food crop in the world. it is mainly used for human food, animal feed, and for manufacturing starch and alcohol. this crop, a highly heterozygous, generally self-incompatible, outcrossing polyploidy, poses numerous challenges for the conventional breeding. its productivity and quality are often limited by abiotic and biotic stresses. gene engineering has been shown to have the great potential for improving the resistance to these stresses as well as the ...201728465664
isolation and abiotic stress resistance analyses of a catalase gene from ipomoea batatas (l.) lam.as an indicator of the antioxidant capability of plants, catalase can detoxify reactive oxygen species (ros) generated by environmental stresses. sweet potato is one of the top six most important crops in the world. however, its catalases remain largely unknown. in this study, a catalase encoding gene, ibcat2 (accession number: ky615708), was identified and cloned from sweet potato cv. xushu 18. it contained a 1479 nucleotides' open reading frame (orf). s-r-l, q-k-l, and a putative calmodulin bi ...201728638833
value-added probiotic development by high-solid fermentation of sweet potato with saccharomyces boulardii.controlled fermentation of sweet potato (ipomoea batatas) var. beauregard by yeast, saccharomyces boulardii (may 796) to enhance the nutritional value of sweet potato was investigated. an average 8.00 × 10(10) colony forming units (cfu)/g of viable cells were obtained over 5-day high-solid fermentation. yeast cell viability did not change significantly over time at 4°c whereas the number of viable yeast cells reduced significantly at room temperature (25°c), which was approximately 40% in 12 mon ...201728572951
assessment of the potential health risks associated with the aluminium, arsenic, cadmium and lead content in selected fruits and vegetables grown in jamaica.thirteen jamaican-grown food crops - ackee (blighia sapida), banana (musa acuminate), cabbage (brassica oleracea), carrot (daucus carota), cassava (manihot esculenta), coco (xanthosoma sagittifolium), dasheen (colocasia esculenta), irish potato (solanum tuberosum), pumpkin (cucurbita pepo), sweet pepper (capsicum annuum), sweet potato (ipomoea batatas), tomato (solanum lycopersicum) and turnip (brassica rapa) - were analysed for aluminium, arsenic, cadmium and lead by atomic absorption spectroph ...201728959639
glucose content and in vitro bioaccessibility in sweet potato and winter squash varieties during storage.glucose content and in vitro bioaccessibility were determined in raw and cooked pulp of arapey, cuabé, and beauregard sweet potato varieties, as well as maravilla del mercado and atlas winter squash, after zero, two, four, and six months of storage (14 °c, 80% relative humidity (rh)). the total glucose content in 100 g of raw pulp was, for arapey, 17.7 g; beauregard, 13.2 g; cuabé, 12.6 g; atlas, 4.0 g; and in maravilla del mercado, 4.1 g. these contents were reduced by cooking process and stora ...201728665302
effects of incorporating nonmodified sweet potato (ipomoea batatas) flour on wheat pasta functional characteristics.the effects of substituting wheat flour using fractions of blanched or nonblanched sweet potato flour on produced pasta functional characteristics were investigated. the use of sweet potato flour to replace fractions of wheat flour, regardless of blanching treatment, resulted in significant (p < .05) increase in water holding capacity (whc), cooked pasta water uptake and solid leaching out and freeze-thaw stability of produced pasta. for instance, treatment containing 40% of nonblanched sweet po ...201729283180
horizontal gene transfer contributes to plant evolution: the case of agrobacterium t-dnas.horizontal gene transfer (hgt) can be defined as the acquisition of genetic material from another organism without being its offspring. hgt is common in the microbial world including archaea and bacteria, where hgt mechanisms are widely understood and recognized as an important force in evolution. in eukaryotes, hgt now appears to occur more frequently than originally thought. many studies are currently detecting novel hgt events among distinct lineages using next-generation sequencing. most exa ...201729225610
viscoelastic properties of sweet potato complementary porridges as influenced by endogenous amylases.sweet potato (ipomoea batatas l.) roots contain amylolytic enzymes, which hydrolyze starch thus having the potential to affect the viscosity of sweet potato porridges provided the appropriate working conditions for the enzymes are attained. in this study, the effect of sweet potato variety, postharvest handling conditions, freshly harvested and room/ambient stored roots (3 weeks), and slurry solids content on the viscoelastic properties of complementary porridges prepared using amylase enzyme ac ...201729188034
characterization and hepatoprotective activity of anthocyanins from purple sweet potato (ipomoea batatas l. cultivar eshu no. 8).the hepatoprotective activity of anthocyanin-rich purple sweet potato extract (apspe) was demonstrated. sixty mice were randomly divided into six groups: control group [without carbon tetrachloride (ccl4) or apspe]; model group (with ccl4 only); positive control group (50 mg/kg body weight silymarin); low-dose group (100 mg/kg body weight apspe); medium-dose group (200 mg/kg body weight apspe); and high-dose group (400 mg/kg body weight apspe). after 10 days intragastric administration of the re ...201728911647
water-deficit tolerance in sweet potato [ipomoea batatas (l.) lam.] by foliar application of paclobutrazol: role of soluble sugar and free proline.the objective of this study was to elevate water deficit tolerance by improving soluble sugar and free proline accumulation, photosynthetic pigment stabilization, photosynthetic abilities, growth performance and storage root yield in sweet potato cv. 'tainung 57' using a foliar application of paclobutrazol (pbz). the experiment followed a completely randomized block design with four concentrations of pbz: 0 (control), 17, 34, and 51 μm before exposure to 47.5% (well irrigation), 32.3% (mild wate ...201728848596
optimization of polysaccharide ultrasonic extraction conditions using purple sweet potato tubers based on free radical scavenging and glycosylation inhibitory bioactivities.the purple sweet potato, ipomoea batatas, belongs to the family convolvulaceae. it is one of the most widely consumed tubers in asia and is found in many dishes. many people with diabetes eat purple sweet potato tubers to help reduce blood glucose in china.201728839380
haplotype-resolved sweet potato genome traces back its hexaploidization history.here we present the 15 pseudochromosomes of sweet potato, ipomoea batatas, the seventh most important crop in the world and the fourth most significant in china. by using a novel haplotyping method based on genome assembly, we have produced a half haplotype-resolved genome from ~296 gb of paired-end sequence reads amounting to roughly 67-fold coverage. by phylogenetic tree analysis of homologous chromosomes, it was possible to estimate the time of two recent whole-genome duplication events as oc ...201728827752
overexpression of arabidopsis p3b increases heat and low temperature stress tolerance in transgenic sweetpotato.sweetpotato (ipomoea batatas [l.] lam) is suitable for growth on marginal lands due to its abiotic stress tolerance. however, severe environmental conditions including low temperature pose a serious threat to the productivity and expanded cultivation of this crop. in this study, we aimed to develop sweetpotato plants with enhanced tolerance to temperature stress.201728806972
use of [c4mim]cl for efficient extraction of caffeoylquinic acids from sweet potato leaves.sweet potato, ipomoea batatas, is a widely cultivated vegetable worldwide. the leaves contain polyphenolic natural products called caffeoylquinic acids (cqas), which possess biological activities including inhibition of aggregation of amyloid peptides. the present study describes an efficient extraction and isolation procedure for cqas from sweet potato leaves using a cellulose-dissolving ionic liquid. the results showed that, compared to methanol, use of 1-butyl-3-methylimidazolium chloride ([c ...201728761111
the potential of computer vision, optical backscattering parameters and artificial neural network modelling in monitoring the shrinkage of sweet potato (ipomoea batatas l.) during drying.drying is a method used to preserve agricultural crops. during the drying of products with high moisture content, structural changes in shape, volume, area, density and porosity occur. these changes could affect the final quality of dried product and also the effective design of drying equipment. therefore, this study investigated a novel approach in monitoring and predicting the shrinkage of sweet potato during drying. drying experiments were conducted at temperatures of 50-70 °c and samples th ...201728758207
a ζ-carotene desaturase gene, ibzds, increases β-carotene and lutein contents and enhances salt tolerance in transgenic sweetpotato.ζ-carotene desaturase (zds) is one of the key enzymes in carotenoid biosynthesis pathway. however, the zds gene has not been applied to carotenoid improvement of plants. its roles in tolerance to abiotic stresses have not been reported. in this study, the ibzds gene was isolated from storage roots of sweetpotato (ipomoea batatas (l.) lam.) cv. nongdafu 14. its overexpression significantly increased β-carotene and lutein contents and enhanced salt tolerance in transgenic sweetpotato (cv. kokei no ...201728716419
comparative transcriptome analysis reveals critical function of sucrose metabolism related-enzymes in starch accumulation in the storage root of sweet potato.the starch properties of the storage root (sr) affect the quality of sweet potato (ipomoea batatas (l.) lam.). although numerous studies have analyzed the accumulation and properties of starch in sweet potato srs, the transcriptomic variation associated with starch properties in sr has not been quantified. in this study, we measured the starch and sugar contents and analyzed the transcriptome profiles of srs harvested from sweet potatoes with high, medium, and extremely low starch contents, at f ...201728690616
segregation of hydroxycinnamic acid esters mediating sweetpotato weevil resistance in storage roots of sweetpotato.resistance to sweetpotato weevils (cylas spp.) has been identified in several sweetpotato (ipomoea batatas) landraces from east africa and shown to be conferred by hydroxycinnamic acids that occur on the surface of storage roots. the segregation of resistance in this crop is unknown and could be monitored using these chemical traits as markers for resistance in f1 offspring from breeding programs. for the first time in a segregating population, we quantified the plant chemicals that confer resis ...201728659954
zinc, copper, or cerium accumulation from metal oxide nanoparticles or ions in sweet potato: yield effects and projected dietary intake from consumption.the potential release of metal oxide engineered nanoparticles (enp) into agricultural systems has created the need to evaluate the impact of these materials on crop yield and food safety. the study here grew sweet potato (ipomoea batatas) to maturity in field microcosms using substrate amended with three concentrations (100, 500 or 1000 mg kg dw-1) of either nzno, ncuo, or nceo2 or equivalent amounts of zn2+, cu2+, or ce4+. adverse effects on tuber biomass were observed only for the highest conc ...201727102448
ibor regulates photosynthesis under heat stress by stabilizing ibpsbp in sweetpotato.the orange (or) protein regulates carotenoid biosynthesis and environmental stress in plants. previously, we reported that overexpression of the sweetpotato [ipomoea batatas (l.) lam] or gene (ibor) in transgenic arabidopsis (referred to as ibor-ox/at) increased the efficiency of photosystem ii (psii) and chlorophyll content after heat shock. however, little is known about the role of ibor in psii-mediated protection against abiotic stress. in this study, comparative proteomics revealed that exp ...201728642783
phylogenetic placement and morphological characterization of sclerotium rolfsii (teleomorph: athelia rolfsii) associated with blight disease of ipomoea batatas in korea.in this study, we aimed to characterize fungal samples from necrotic lesions on collar regions observed in different sweetpotato growing regions during 2015 and 2016 in korea. sclerotia appeared on the root zone soil surface, and white dense mycelia were observed. at the later stages of infection, mother roots quickly rotted, and large areas of the plants were destroyed. the disease occurrence was monitored at 45 and 84 farms, and 11.8% and 6.8% of the land areas were found to be infected in 201 ...201729138617
characterization of dietary constituents and antioxidant capacity of tropaeolum pentaphyllum lam.the aim of this study was to evaluate the nutritional content and antioxidant capacity of the tubers, leaves and, flowers of the species tropaeolum pentaphyllum lam. the three parts of the plant were analyzed by physicochemical methods, atomic absorption spectrometry, spectrophotometric and chromatographic techniques. the tubers, leaves, and flowers exhibited significant differences in all parameters evaluated. the leaves showed significantly higher values of protein (16.28 ± 0.02 g/100 g), tota ...201729051654
syk - gtp rac-1 mediated immune-stimulatory effect of cuscuta epithymum, ipomoea batata and euphorbia hirta plant extracts.polymorphonuclear neutrophils (pmnn) are the pivotal mediators of phagocytosis. in addition to neutropenia, impaired neutrophilic function is associated with pathological conditions and immuno-deficiencies. henceforth, immuno-stimulatory strategies targeting neutrophilic function are indeed powerful tools in combating obstinate infections. in appreciation towards the usefulness of herbal medicines in therapeutic scenario, the present study was carried out to analyse the immuno-stimulatory effect ...201729049977
construction of a genetic map using est-ssr markers and qtl analysis of major agronomic characters in hexaploid sweet potato (ipomoea batatas (l.) lam).the sweet potato, ipomoea batatas (l.) lam, is difficult to study in genetics and genomics because it is a hexaploid. the sweet potato study not have been performed domestically or internationally. in this study was performed to construct genetic map and quantitative trait loci (qtl) analysis. a total of 245 est-ssr markers were developed, and the map was constructed by using 210 of those markers. the total map length was 1508.1 cm, and the mean distance between markers was 7.2 cm. fifteen chara ...201729020092
genetic analysis and association of simple sequence repeat markers with storage root yield, dry matter, starch and β-carotene content in sweetpotato.molecular markers are needed for enhancing the development of elite sweetpotato (ipomoea batatas (l.) lam) cultivars with a wide range of commercially important traits in sub-saharan africa. this study was conducted to estimate the heritability and determine trait correlations of storage root yield, dry matter, starch and β-carotene content in a cross between 'new kawogo' × 'beauregard'. the study was also conducted to identify simple sequence repeat (ssr) markers associated with these traits. a ...201728588391
anthocyanins from purple sweet potato (ipomoea batatas (l.) lam.) and their color modulation by the addition of phenolic acids and food-grade phenolic plant extracts.anthocyanin profiles and contents of three purple sweet potato provenances were investigated by hplc-dad-msn. in contrast to widely uniform profiles, the contents of total (558-2477mg/100gdm) and individual anthocyanins varied widely. furthermore, quantitative and qualitative effects of intermolecular co-pigmentation were studied by adding chlorogenic and rosmarinic acids, and food-grade phenolic apple and rosemary extracts at various dosages to a diluted purple sweet potato concentrate at ph 0. ...201728554635
structure of sweet potato (ipomoea batatas) diversity in west africa covaries with a climatic gradient.sub-saharan agriculture has been identified as vulnerable to ongoing climate change. adaptation of agriculture has been suggested as a way to maintain productivity. better knowledge of intra-specific diversity of varieties is prerequisites for the successful management of such adaptation. among crops, root and tubers play important roles in food security and economic growth for the most vulnerable populations in africa. here, we focus on the sweet potato. the sweet potato (ipomoea batatas) was d ...201728552989
effect of high pressure on the saccharification of starch in the tuberous root of sweet potato (ipomoea batatas).we analyzed the effect of high hydrostatic pressure (hhp) treatment on reducing sugar production in the tuberous root of sweet potato (ipomoea batatas), based on pressure-gelatinization of starch and subsequent saccharification by internal amylases. hhp treatment at up to 600mpa at ambient temperature for 10min did not apparently affect the reducing sugar concentration in tuberous root. however, hhp treatment at 100 to 500mpa and 60°c or 70°c for 10min increased reducing sugar concentration as b ...201728506613
cloning and characterization of a novel gigantea gene in sweet potato.the transition from vegetative to reproductive growth, a key event in the lifecycle of a plant, is affected by environmental stresses. the flowering-time regulator gigantea (gi) may be contributing to susceptibility of the regulation of photoperiodic flowering, circadian rhythm control, and abiotic stress resistance in arabidopsis. however, the role of gi in sweet potato remains unknown. here, we isolated and characterized a gi gene (ibgi) from sweet potato (ipomoea batatas [l.] lam). the ibgi c ...201728486137
plastidial α-glucan phosphorylase 1 complexes with disproportionating enzyme 1 in ipomoea batatas storage roots for elevating malto-oligosaccharide metabolism.it has been proposed that malto-oligosaccharides (moss) are possibly recycled back into amylopectin biosynthesis via the sequential reactions catalyzed by plastidial α-glucan phosphorylase 1 (pho1) and disproportionating enzyme 1 (dpe1). in the present study, the reciprocal co-immunoprecipitation experiments using specific antibodies against pho1 and dpe1 demonstrated that these two enzymes can form a complex (the pd complex) in ipomoea batatas storage roots. the immunohistochemistry analyses al ...201728472155
carbohydrate components in sweetpotato storage roots: their diversities and genetic improvement.carbohydrates are important components in sweetpotatoes in terms of both their industrial use and eating quality. although there has been a narrow range of diversity in the properties of sweetpotato starch, unique varieties and experimental lines with different starch traits have been produced recently both by conventional breeding and genetic engineering. the diversity in maltose content, free sugar composition and textural properties in sweetpotato cultivars is also important for their eating ...201728465669
functional components in sweetpotato and their genetic improvement.in addition to the nutritionally important components such as starches, vitamins and minerals, storage roots and leaves of sweetpotato (ipomoea batatas) contains several components with health-promoting functions. of these, the functionalities of carotenoids, anthocyanins and caffeoylquinic acids have been well established by in vitro and in vivo experiments. several sweetpotato cultivars containing high levels of these components have been developed in japan; e.g., 'ayamurasaki', which has high ...201728465668
challenges to genome sequence dissection in sweetpotato.the development of next generation sequencing (ngs) technologies has enabled the determination of whole genome sequences in many non-model plant species. however, genome sequencing in sweetpotato (ipomoea batatas (l.) lam) is still difficult because of the hexaploid genome structure. previous studies suggested that a diploid wild relative, i. trifida (h.b.k.) don., is the most possible ancestor of sweetpotato. therefore, the genetic and genomic features of i. trifida have been studied as a poten ...201728465666
metabolic engineering of carotenoids in transgenic sweetpotato.sweetpotato [ipomoea batatas (l.) lam], which contains high levels of antioxidants such as ascorbate and carotenoids in its storage root, is one of the healthiest foods, as well as one of the best starch crops for growth on marginal lands. in plants, carotenoid pigments are involved in light harvesting for photosynthesis and are also essential for photo-protection against excess light. as dietary antioxidants in humans, these compounds benefit health by alleviating aging-related diseases. the st ...201728465665
recent progress in sweetpotato breeding and cultivars for diverse applications in japan.sweetpotato (ipomoea batatas (l.) lam.) is an outcrossing hexaploid that is cultivated in the tropics and warm-temperate regions of the world. sweetpotato has played an important role as a famine-relief crop during its long history and has recently been reevaluated as a health-promoting food. in japan, sweetpotato is used for a wide range of applications, such as table use, processed foods, and alcohol and starch production, and two groups at national agriculture research organization (naro) und ...201728465663
combined application of biofertilizers and inorganic nutrients improves sweet potato yields.sweet potato [ipomoea batatas (l) lam] yields currently stand at 4.5 t ha-1 on smallholder farms in uganda, despite the attainable yield (45-48 t ha-1) of naspot 11 cultivar comparable to the potential yield (45 t ha-1) in sub-saharan africa (ssa). on-farm field experiments were conducted for two seasons in the mt elgon high farmlands and lake victoria crescent agro-ecological zones in uganda to determine the potential of biofertilizers, specifically arbuscular mycorrhizal fungi (amf), to increa ...201728348569
rapid quantitative determination of maltose and total sugars in sweet potato (ipomoea batatas l. [lam.]) varieties using hptlc.when a raw sweet potato root is analysed, only sucrose, glucose and fructose are present but during cooking, starch is hydrolysed into maltose giving the sweet flavour to cooked roots. this study aimed at developing an hptlc protocol for the rapid quantitative determination of maltose and total sugars in four commercial varieties and to compare them to 243 hybrids grouped by flesh colour (white, orange, purple). in commercial varieties, mean maltose content varied from 10.26 to 15.60% and total ...201728298685
a root-preferential dfr-like gene encoding dihydrokaempferol reductase involved in anthocyanin biosynthesis of purple-fleshed sweet potato.purple-fleshed sweet potato is good for health due to rich anthocyanins in tubers. although the anthocyanin biosynthetic pathway is well understood in up-ground organs of plants, the knowledge on anthocyanin biosynthesis in underground tubers is limited. in the present study, we isolated and functionally characterized a root-preferential gene encoding dihydrokaempferol reductase (ibdhkr) from purple-fleshed sweet potato. ibdhkr showed highly similarity with the reported dihydroflavonol reductase ...201728293252
a high-density snp genetic map consisting of a complete set of homologous groups in autohexaploid sweetpotato (ipomoea batatas).sweetpotato (ipomoea batatas) is an autohexaploid species with 90 chromosomes (2n = 6x = 90) and a basic chromosome number of 15, and is therefore regarded as one of the most challenging species for high-density genetic map construction. here, we used single nucleotide polymorphisms (snps) identified by double-digest restriction site-associated dna sequencing based on next-generation sequencing technology to construct a map for sweetpotato. we then aligned the sequence reads onto the reference g ...201728281636
genome-wide assessment of population structure and genetic diversity and development of a core germplasm set for sweet potato based on specific length amplified fragment (slaf) sequencing.sweet potato, ipomoea batatas (l.) lam., is an important food crop that is cultivated worldwide. however, no genome-wide assessment of the genetic diversity of sweet potato has been reported to date. in the present study, the population structure and genetic diversity of 197 sweet potato accessions most of which were from china were assessed using 62,363 snps. a model-based structure analysis divided the accessions into three groups: group 1, group 2 and group 3. the genetic relationships among ...201728187178
comparative analysis of the root transcriptomes of cultivated sweetpotato (ipomoea batatas [l.] lam) and its wild ancestor (ipomoea trifida [kunth] g. don).the complex process of formation of storage roots (srs) from adventitious roots affects sweetpotato yield. identifying the genes that are uniquely expressed in the sr forming cultivated species, ipomoea batatas (ib), and its immediate ancestral species, ipomoea trifida (it), which does not form srs, may provide insights into the molecular mechanisms underlying sr formation in sweetpotato.201728086804
transcriptome profiling of sweetpotato tuberous roots during low temperature storage.sweetpotato [ipomoea batatas (l.) lam] is a globally important root crop with high industrial value. however, because sweetpotato tuberous roots undergo chilling injuries that negatively affect their quality at temperatures below 10 °c, postharvest damage during the winter season is a major constraint for industrialization. to understand chilling injury response during postharvest low temperature storage, we used next-generation sequencing technology to comprehensive analyze the transcriptome of ...201728056396
fractionation, enzyme inhibitory and cellular antioxidant activity of bioactives from purple sweet potato (ipomoea batatas).sweet potato (ipomoea batatas l.) is mainly cultivated in asia. the deep purple color of purple sweet potato (psp) is due to the high content of acylated anthocyanins. in the present study, psp-derived polyphenols were identified using hplc-pda and hplc-esi-msn analyses. after concentration of the polyphenols from psp, preparative separation into two fractions, designated anthocyanins (af) and copigments (cf), was carried out using adsorptive membrane chromatography. in enzyme inhibitory assays, ...201727979226
h+ -pyrophosphatase ibvp1 promotes efficient iron use in sweet potato [ipomoea batatas (l.) lam.].iron (fe) deficiency is one of the most common micronutrient deficiencies limiting crop production globally, especially in arid regions because of decreased availability of iron in alkaline soils. sweet potato [ipomoea batatas (l.) lam.] grows well in arid regions and is tolerant to fe deficiency. here, we report that the transcription of type i h+ -pyrophosphatase (h+ -ppase) gene ibvp1 in sweet potato plants was strongly induced by fe deficiency and auxin in hydroponics, improving fe acquisiti ...201727864852
sweet potato peels and cancer prevention.a bioassay-guided fractionation of an alcoholic extract from the peels of ipomoea batatas lam has been carried out. sulforhodamine b and 2,2-diphenyl-1-picrylhydrazyl (dpph) assays were used to evaluate the anticancer and antioxidant potential, respectively, while silica gel column chromatography (cc) was used to isolate compounds that were characterized using 1d- and 2d-nmr (nuclear magnetic resonance) and mass spectrometry. the alcoholic extract was fractionated into n-hexane, ethyl acetate, n ...201727673552
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