Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| malate oxidation, rotenone-resistance, and alternative path activity in plant mitochondria. | the effect of cyanide and rotenone on malate (ph 6.8), malate plus glutamate (ph 7.8), citrate, alpha-ketoglutarate, and succinate oxidation by cauliflower (brassica oleracea l.) bud, sweet potato (ipomoea batatis l.) tuber, and spinach (spinacia oleracea and kalanchoë daigremontiana leaf mitochondria was investigated. cyanide inhibited all substrates equally with the exception of malate plus glutamate; in this case, inhibition of o(2) uptake was more severe due to an effect of cyanide on aspart ... | 1982 | 16662651 |
| carbon dioxide effects on ethanol production, pyruvate decarboxylase, and alcohol dehydrogenase activities in anaerobic sweet potato roots. | the effect of varied anaerobic atmospheres on the metabolism of sweet potato (ipomoea batatas [l.] lam.) roots was studied. the internal gas atmospheres of storage roots changed rapidly when the roots were submerged under water. o(2) and n(2) gases disappeared quickly and were replaced by co(2). there were no appreciable differences in gas composition among the four cultivars that were studied. under different anaerobic conditions, ethanol concentration in the roots was highest in a co(2) enviro ... | 1983 | 16662798 |
| starch phosphorylase inhibitor from sweet potato. | a protein, starch phosphorylase inhibitor, was purified from the root of sweet potato (ipomoea batatas [l.] lam. cv tainon 65). it had a molecular weight of 250,000 and could be composed of five identical subunits. the isoelectric point of the inhibitor was 4.63. it was a noncompetitive inhibitor toward the sweet potato enzyme with a k(i) value of 1.3 x 10(-6) molar when glucose-1-p was the variable substrate. because cross-reacting materials of rabbit antiphosphorylase inhibitor of sweet potato ... | 1986 | 16664657 |
| phase transitions in liposomes formed from the polar lipids of mitochondria from chilling-sensitive plants. | the thermal response of mitochondrial polar lipids from a variety of chilling-sensitive and chilling-insensitive plants was determined by differential scanning calorimetry. a phase transition was observed at 15 degrees c for mitochondria from soybeam (glycine max. cv davis) hypocotyl, at 16 degrees c for tomato (lycopersicon esculentum cv flora-dade and cv grosse lisse) fruit, at 15 degrees c for cucumber (cucumus sativus l.) fruit, at 14 degrees c for mung bean (vigna radiata var berken) hypoco ... | 1986 | 16664907 |
| starch phosphorylase inhibitor is beta-amylase. | the proteinaceous noncompetitive inhibitor of starch phosphorylase isolated from the root of sweet potato (ipomoea batatas [l.] lam.) (tc chang, jc su 1986 plant physiol 80: 534-538) has been identified as a beta-amylase. the starch phosphorylase inhibitor and beta-amylase activities copurified to give a protein indistinguishable from commercial beta-amylase by electrophoretic and immunological methods, and the two activities showed parallel responses in ph, temperature, and inhibitor sensitivit ... | 1988 | 16666436 |
| structure and characterization of a cdna clone for phenylalanine ammonia-lyase from cut-injured roots of sweet potato. | a cdna clone for phenylalanine ammonia-lyase (pal) induced in wounded sweet potato (ipomoea batatas lam.) root was obtained by immunoscreening a cdna library. the protein produced in escherichia coli cells containing the plasmid ppal02 was indistinguishable from sweet potato pal as judged by ouchterlony double diffusion assays. the m(r) of its subunit was 77,000. the cells converted [(14)c]-l-phenylalanine into [(14)c]-t-cinnamic acid and pal activity was detected in the homogenate of the cells. ... | 1989 | 16666943 |
| primary structure of sweet potato starch phosphorylase deduced from its cdna sequence. | sweet potato (ipomoea batatas) starch phosphorylase cdna clones were isolated by screening an expression library prepared from the young root poly(a)(+) rna successively with an antiserum, a monoclonal antibody, and a specific oligonucleotide probe. one cdna clone had 3292 nucleotide residues in which was contained an open reading frame coding for 955 amino acids. this sequence was compared with those of potato (916 residues plus 50-residue putative transit peptide) and rabbit muscle (841 residu ... | 1991 | 16668119 |
| sucrose-induced accumulation of beta-amylase occurs concomitant with the accumulation of starch and sporamin in leaf-petiole cuttings of sweet potato. | beta-amylase of sweet potato (ipomoea batatas l.), which constitutes about 5% of the total soluble protein of the tuberous root, is absent or is present in only small amounts in organs other than the tuberous roots of the normal, field-grown plants. however, when leaf-petiole cuttings from such plants were supplied with a solution that contained sucrose, the accumulation of beta-amylase was induced in both leaf and petiole portions of the explants. the sucrose-induced accumulation of beta-amylas ... | 1991 | 16668273 |
| sugar-dependent expression of the chs-a gene for chalcone synthase from petunia in transgenic arabidopsis. | transgenic arabidopsis thaliana plants were constructed by introduction of a fusion of the gene for beta-glucuronidase (gus) to the chs-a gene, which is one of the two genes for chalcone synthase that are actively expressed in the floral organs of petunia. the expression of the fusion gene chs-a::gus was low in transgenic arabidopsis plantlets, but it was enhanced when plantlets or detached leaves were transferred to a medium that contained 0.3 molar sucrose, glucose, or fructose. no enhancement ... | 1991 | 16668565 |
| phenylalanine ammonia-lyase from loblolly pine : purification of the enzyme and isolation of complementary dna clones. | phenylalanine ammonia-lyase (ec 4.3.1.5) has been purified from differentiating secondary xylem of loblolly pine (pinus taeda l.). native molecular weight of the enzyme was estimated to be 280,000, with a subunit molecular weight of 74,000; isoelectric point, 5.8; and michaelis constant for i-phenylalanine, 27 micromolar. no evidence was obtained for the existence of isoforms of the enzyme, nor for negative cooperativity of substrate binding. polyclonal antibodies were raised against the phenyla ... | 1992 | 16668639 |
| high performance liquid chromatography analysis of carbohydrates of cotton-phloem sap and of honeydew produced by bemisia tabaci feeding on cotton. | phloem sap from cotton (gossypium hirsutum l.) was collected from young and mature leaves by the aphid-stylet technique. exudate was analyzed for carbohydrates by hplc using sensitive pulsed amperometric detection. the predominant carbohydrate present (>90%) was identified as sucrose. a second, unidentified compound that was not one of the more commonly translocated sugars was detected in mature leaves. carbohydrates in honeydew produced by the sweet-potato whitefly (bemisia tabaci [genn.]) feed ... | 1992 | 16668706 |
| induction of expression of genes coding for sporamin and beta-amylase by polygalacturonic acid in leaf-petiole cuttings of sweet potato. | sporamin and beta-amylase are two major proteins of tuberous storage root of sweet potato (ipomoea batatas) and their accumulation can be induced concomitantly with the accumulation of starch in leaves and petioles by sucrose (k nakamura, m ohto, n yoshida, k nakamura [1991] plant physiol 96: 902-909). although mechanical wounding of leaves of sweet potato only occasionally induced the expression of sporamin and beta-amylase genes, their expression could be reproducibly induced in leaf-petiole c ... | 1992 | 16668901 |
| identification and localization of a rickettsia sp. in bemisia tabaci (homoptera: aleyrodidae). | whiteflies (homoptera: aleyrodidae) are sap-sucking insects that harbor "candidatus portiera aleyrodidarum," an obligatory symbiotic bacterium which is housed in a special organ called the bacteriome. these insects are also home for a diverse facultative microbial community which may include hamiltonella, arsenophonus, fritchea, wolbachia, and cardinium spp. in this study, the bacteria associated with a b biotype of the sweet potato whitefly bemisia tabaci were characterized using molecular fing ... | 2006 | 16672513 |
| within-plant distribution and sampling of single and mixed infestations of bemisia tabaci and trialeurodes vaporariorum (homoptera: aleyrodidae) in winter tomato crops. | in several areas of spain, the greenhouse whitefly, trialeurodes vaporariorum (westwood), and the sweet potato whitefly, bemisia tabaci (gennadius), coexist in tomato, lycopersicon esculentum miller. for integrated pest management decision-making, it is important to know the abundance of each species, because they exhibit different abilities to transmit viruses, are susceptible to different biological control agents, and have different responses to insecticides. this study was conducted to provi ... | 2006 | 16686130 |
| the partial purification and properties of antibiotic substances from the sweet potato plant (ipomoea batatas). | 1949 | 16695758 | |
| in vitro availability of some essential minerals in commonly eaten processed and unprocessed caribbean tuber crops. | the levels of three essential minerals ca, fe and mg and the extent of their availability were assessed in four commonly eaten caribbean tuber crops [dasheen (xanthosoma spp.), irish potato (solanum tuberosum), sweet potato (ipomoea batatas) and yellow yam (dioscorea cayenensis)] in their processed and unprocessed states. calcium was highest in cooked dasheen (5150+/-50 mg/kg) while magnesium was highest in uncooked irish potato (3600+/-200 mg/kg). there was no significant loss of calcium from t ... | 2007 | 16758116 |
| molecular cloning and characterization of a granulin-containing cysteine protease spcp3 from sweet potato (ipomoea batatas) senescent leaves. | granulins are a family of evolutionarily ancient proteins that are involved in regulating cell growth and division in animals. in this report a full-length cdna, spcp3, was isolated from senescent leaves of sweet potato (ipomoea batatas). spcp3 contains 1389 nucleotides (462 amino acids) in its open reading frame, and exhibits high amino acid sequence homologies (ca. 64-73.6%) with several plant granulin-containing cysteine proteases, including potato, tomato, soybean, kidney bean, pea, maize, r ... | 2006 | 16777534 |
| starch-branching enzyme i gene (ibsbei) from sweet potato (ipomoea batatas); molecular cloning and expression analysis. | the cdna of the starch-branching enzyme i gene (ibsbei) in the sweet potato (ipomoea batatas) has been cloned and sequenced. the ibsbei amino acid sequence was 81% identical to that of potato stsbei. dna gel-blot analyses demonstrated that at least two copies of ibsbei are present in the sweet potato genome. ibsbei was strongly expressed in tuberous roots. transcript levels in the roots of single leaf cuttings were extremely low during the first 15-40 d after planting and continuously increased ... | 2006 | 16802100 |
| prehistoric agricultural depletion of soil nutrients in hawai'i. | we investigated the fate of soil nutrients after centuries of indigenous dryland agriculture in hawai'i using a coupled geochemical and archaeological approach. beginning approximately 500 years ago, farmers began growing dryland taro and sweet potato on the leeward slopes of east maui. their digging sticks pierced a subsurface layer of cinders, enhancing crop access to the soil water stored below the intact cinders. cultivation also catalyzed nutrient losses, directly by facilitating leaching o ... | 2006 | 16832047 |
| effectiveness of two insect growth regulators against bemisia tabaci (gennadius) (homoptera: aleyrodidae) and helicoverpa armigera (hübner) (lepidoptera: noctuidae) and their impact on population densities of arthropod predators in cotton in pakistan. | field efficacies of two insect growth regulators (igrs) at two recommended application rates, buprofezin at 370 and 555 g ai ha(-1) and lufenuron at 37 and 49 g ai ha(-1), were determined against the sweet potato whitefly, bemisia tabaci (gennadius), and the cotton bollworm, helicoverpa armigera (hübner), in experimental plots of cotton at the directorate of cotton research, faisalabad, pakistan. adverse effects of the igrs on populations of associated arthropod predators, namely geocorids, chry ... | 2006 | 16862616 |
| seven new aminoacyl sugars in ipomoea batatas. | an analysis of the polar extracts from sweet potato ipomoea batatas (convolvulaceae) led to the isolation of seven unknown aminoacyl sugars. on the basis of 1d, 2d nmr, and mass spectrometry data, the structures of the compounds were elucidated as: beta-d-fructofuranosyl-(2 --> 1)-alpha-d-[2-o-valyl]-glucopyranoside (1), beta-d-fructofuranosyl-(2 --> 1)-alpha-d-[2-o-tyrosyl]-glucopyranoside (2), beta-d-fructofuranosyl-(2 --> 1)-alpha-d-[2-o-threonyl]-glucopyranoside (3), beta-d-fructofuranosyl-( ... | 2006 | 16881721 |
| food processing methods influence the glycaemic indices of some commonly eaten west indian carbohydrate-rich foods. | glycaemic index (gi) values for fourteen commonly eaten carbohydrate-rich foods processed by various methods were determined using ten healthy subjects. the foods studied were round leaf yellow yam (dioscorea cayenensis), negro and lucea yams (dioscorea rotundata), white and sweet yams (dioscorea alata), sweet potato (solanum tuberosum), irish potato (ipomoea batatas), coco yam (xanthosoma spp.), dasheen (colocasia esculenta), pumpkin (cucurbita moschata), breadfruit (artocarpus altilis), green ... | 2006 | 16925852 |
| [drought tolerance of transgenic sweet potato expressing both cu/zn superoxide dismutase and ascorbate peroxidase]. | two strains, cu/zn sod and apx gene transferred sweet potato (ts) and non-transgenic sweet potato (ipomoea batatas l.) (nt), were used as experimental materials to study the drought tolerance under three different degrees of water stress: 0, -0.44 mpa, -0.78 mpa. the results showed that activities of cu/zn sod and apx increased under -0.44 mpa and decreased under -0.78 mpa (fig. 2), p(n), g(s) and leaf water content decreased, c(i) increased, then decreased under water stress (fig. 6), but under ... | 2006 | 16957397 |
| electrophysiological and behavioral responses of a cuban population of the sweet potato weevil to its sex pheromone. | the sex pheromone of feral sweet potato weevils cylas formicarius elegantulus from cuba was found, via solid-phase microextraction analysis, to be identical to (z)-3-dodecenyl (e)-2-butenoate, a previously reported compound. females emitted 20 pg pheromone d(-1). in scanning electron microscopy studies carried out on the male antenna, we identified several types of sensilla: sensilla trichoidea of type 1 (st1) as long hairs (100-150 microm), sensilla trichoidea of type 2 as short hairs (50-60 mi ... | 2006 | 16977491 |
| determination of acylated anthocyanin in human urine after ingesting a purple-fleshed sweet potato beverage with various contents of anthocyanin by lc-esi-ms/ms. | eighty-seven healthy volunteers ingested a purple-fleshed sweet potato beverage with various contents of anthocyanin (beverage a; 22.1 mg/250 ml, b; 107.8, c; 84.9). an acylated anthocyanin, peonidin 3-caffeoylsophoroside-5-glucoside, was detected in the urine 2 h after ingestion. the concentrations were 15.1+/-2.2 microg/l of urine (mean+/-sem), 46.6+/-5.3, and 53.3+/-2.2 for beverages a, b, and c respectively. | 2006 | 17031052 |
| sweet potato [ipomoea batatas (l.) lam]. | among the available transformation methods reported on sweet potato, agrobacterium tumefaciens-mediated transformation is more successful and desirable. stem explants have shown to be ideal for the transformation of sweet potato because of their ready availability as explants, the simple transformation process, and high-frequency-regeneration via somatic embryogenesis. under the two-step kanamycin-hygromycin selection method and using the appropriate explants type (stem explants), the efficiency ... | 2006 | 17033049 |
| improved dry-fleshed sweetpotato genotypes resistant to insect pests. | thirty-five mostly dry-fleshed sweetpotato, ipomoea batatas (l.) lam. (convolvulaceae), genotypes from the usda-ars/clemson university sweetpotato breeding program were evaluated in nine field experiments at the u.s. vegetable laboratory, charleston, sc, from 1998 to 2004. there were highly significant entry effects for percentage of uninjured roots; wireworm, diabrotica, and systena (wds) index; percentage of roots damaged by sweetpotato weevil, cylas formicarius elegantulus (summers); percenta ... | 2006 | 17066825 |
| luminol-hydrogen peroxide chemiluminescence produced by sweet potato peroxidase. | anionic sweet potato peroxidase (spp; ipomoea batatas) was shown to efficiently catalyse luminol oxidation by hydrogen peroxide, forming a long-term chemiluminescence (cl) signal. like other anionic plant peroxidases, spp is able to catalyse this enzymatic reaction efficiently in the absence of any enhancer. maximum intensity produced in spp-catalysed oxidation of luminol was detected at ph 7.8-7.9 to be lower than that characteristic of other peroxidases (8.4-8.6). varying the concentrations of ... | 2013 | 17089355 |
| new polyphenol derivative in ipomoea batatas tubers and its antioxidant activity. | four different polyphenolic compounds were isolated by chromatographic methods from methanolic and hydromethanolic extracts of ipomoea batatas tuber flour. on the basis of uv, mass, and nmr analysis procedures, the structure of the isolated compounds were determined as 4,5-di-o-caffeoyldaucic acid (1), 4-o-caffeoylquinic acid (2), 3,5-di-o-caffeoylquinic acid (3), and 1,3-di-o-caffeoylquinic acid (4). to the best of our knowledge, this is the first report of isolation and characterization of com ... | 2006 | 17090114 |
| analysis of sphingolipids in potatoes (solanum tuberosum l.) and sweet potatoes (ipomoea batatas (l.) lam.) by reversed phase high-performance liquid chromatography electrospray ionization tandem mass spectrometry (hplc-esi-ms/ms). | ceramides and glucocerebrosides of potatoes (solanum tuberosum l.) and sweet potatoes (ipomoea batatas (l.) lam.) were analyzed using rp-hplc-esi-ms/ms. ceramides and glucocerebrosides containing the three different long-chain bases 4,8-sphingadienine (d18:2(delta4,delta8)), 4-hydroxy-8-sphingenine (t18:1(delta8)), and 8-sphingenine (d18:1(delta8)) acylated to saturated and unsaturated hydroxy- and nonhydroxy fatty acids with 16-26 carbon atoms were detected. for ceramides and glucocerebrosides ... | 2006 | 17103377 |
| the broadly insecticidal photorhabdus luminescens toxin complex a (tca): activity against the colorado potato beetle, leptinotarsa decemlineata, and sweet potato whitefly, bemisia tabaci. | toxin complex a (tca), a high molecular weight insecticidal protein complex produced by the entomopathogenic bacterium photorhabdus luminescens, has been found to be orally toxic to both the colorado potato beetle, leptinotarsa decemlineata, and the sweet potato whitefly, bemisia tabaci biotype b. the 48 hour lc50 for tca against neonate l. decemlineata was found to be 2.7 ppm, and the growth of 2nd instar l. decemlineata exposed to tca for 72 hours was almost entirely inhibited at concentration ... | 2005 | 17119614 |
| host-parasitoid interactions relating to penetration of the whitefly, bemisia tabaci, by the parasitoid wasp, eretmocerus mundus. | it has been reported that the aphelinid wasp eertmocerus mundus parasitizes all four nymphal instars of the sweet potato whitefly, bemisia tabaci (biotype b), with 3rd instars being the preferred hosts. the parasitoid lays its egg on the leaf underneath the host nymph. first instars hatch and later penetrate the whitefly. previous studies have shown that the initiation of parasitoid penetration induces the host to form a cellular capsule around the parasitoid. as described here, females never ov ... | 2005 | 17119628 |
| biological and molecular variability among geographically diverse isolates of sweet potato virus 2. | sweet potato virus 2 (spv2) is a tentative member of the genus potyvirus, family potyviridae. in addition to the type isolate of spv2 recently characterised in greater detail, twelve additional isolates of this virus were obtained from sweet potato clones originating from china, portugal, south africa and zambia. sequences of the coat protein (cp) gene and 3' non-translated region (ntr) were determined. comparisons of the cp gene sequences of these isolates revealed nucleotide and amino acid seq ... | 2007 | 17136503 |
| [sweet potato in pre-columbian polynesia--an overview]. | an overview is presented on the reports available so far on sweet potato, ipomoea batatas, cultivated widely in polynesia in the pre-columbian era, with reference to possible ways and presumptive dates of transfer from the americas to polynesia, such as (1) polynesian navigators' travel to peru, (2) peruvian fishermen's drift westward, (3) vessel drift, (4) seed drift, (5) root-tuber drift, and (6) transport by birds. the author supports the case (1) as most plausible. ganshu or ganchu described ... | 2006 | 17139158 |
| analysis of transitive rna silencing after grafting in transgenic plants with the coat protein gene of sweet potato feathery mottle virus. | we have previously reported the graft transmission of target specificity for rna silencing using transgenic nicotiana benthamiana plants expressing the coat protein gene (cp, including the 3' non-translated region) of sweet potato feathery mottle virus. transgenic plants carrying the 5' 200 and 400 bp regions of cp were newly produced. from these plants, two silenced and two non-silenced lines were selected to investigate the manifestation of transitive rna silencing by graft experiments. non-si ... | 2007 | 17160454 |
| sequence analysis of the entire rna genome of a sweet potato chlorotic fleck virus isolate reveals that it belongs to a distinct carlavirus species. | since the paucity of information on sweet potato chlorotic fleck virus (spcfv) had precluded its classification, we have determined the complete nucleotide sequence of the single-stranded rna genome of a ugandan isolate of spcfv. the genome is 9104 nucleotides long (excluding the poly(a) tail) and potentially includes six open reading frames (orfs). based on genomic organisation and sequence similarity, spcfv appears to be a member of the genus carlavirus (family flexiviridae). however, spcfv is ... | 2007 | 17187295 |
| growth suppression of human cancer cells by polyphenolics from sweetpotato (ipomoea batatas l.) leaves. | sweetpotato leaves (ipomoea batatas l.) contain a high content of polyphenolics that consist of caffeic acid, chlorogenic acid, 3,4-di-o-caffeoylquinic acid, 3,5-di-o-caffeoylquinic acid, 4,5-di-o-caffeoylquinic acid, and 3,4,5-tri-o-caffeoylquinic acid. we investigated the suppression of the proliferation of selected human cancer cells by phenolic compounds isolated from sweetpotato leaf. the human cancer cells used in this research included a stomach cancer (kato iii), a colon cancer (dld-1), ... | 2007 | 17199331 |
| isolation of a regulatory gene of anthocyanin biosynthesis in tuberous roots of purple-fleshed sweet potato. | many transcriptional factors harboring the r2r3-myb domain, basic helix-loop-helix domain, or wd40 repeats have been identified in various plant species as regulators of flavonoid biosynthesis in flowers, seeds, and fruits. however, the regulatory elements of flavonoid biosynthesis in underground organs have not yet been elucidated. we isolated the novel myb genes ibmyb1 and ibmyb2s from purple-fleshed sweet potato (ipomoea batatas l. lam. cv ayamurasaki). ibmyb1 was predominantly expressed in t ... | 2007 | 17208956 |
| molecular genetic studies of natives on easter island: evidence of an early european and amerindian contribution to the polynesian gene pool. | most archaeological and linguistic evidence suggest a polynesian origin of the population of easter island (rapanui), and this view has been supported by the identification of polynesian mitochondrial dna (mtdna) polymorphisms in prehistoric skeletal remains. however, some evidence of an early south american contact also exists (the sweet potato, bottle gourd etc.), but genetic studies have so far failed to show an early amerindian contribution to the gene pool on easter island. to address this ... | 2007 | 17212703 |
| tropical whitefly ipm project. | the tropical whitefly ipm project (twfp) is an initiative of the systemwide ipm programme of the consultative group on international agricultural research (cgiar), financed by the department for international development (dfid) of the united kingdom, the danish international development agency (danida), the united states department of agriculture (usda) and agency for international development (usaid), the australian centre for international agricultural research (aciar), and the new zealand age ... | 2007 | 17222696 |
| ecdysteroids and juvenile hormones of whiteflies, important insect vectors for plant viruses. | ecdysteroids and juvenile hormones (jhs) regulate many physiological events throughout the insect life cycle, including molting, metamorphosis, ecdysis, diapause, reproduction, and behavior. fluctuation of whitefly ecdysteroid levels and the identity of the whitefly molting hormone (20-hydroxyecdysone) have only been reported within the last few years. an ecdysteroid commitment peak that is associated with the reprogramming of tissues for a metamorphic molt in many holometabolous and some hemime ... | 2007 | 17258230 |
| toxicity and feeding deterrence of crude toxin extracts of lecanicillium (verticillium) lecanii (hyphomycetes) against sweet potato whitefly, bemisia tabaci (homoptera: aleyrodidae). | crude toxins [toxin(v3450) and toxin(vp28,) extracted from lecanicillium (verticillium) lecanii (zimmermann) gams & zare strain v3450 and vp28 respectively] were tested for contact toxicity, feeding deterrence and repellent activity against the sweet potato whitefly, bemisia tabaci (gennadius) (homoptera: aleyrodidae). both toxins showed ovicidal activity to eggs, with lc(50) values of 447 and 629 mg l(-1) respectively. nymphs of b. tabaci were the most susceptible stages (lc(50) values were cal ... | 2007 | 17315271 |
| molecular characterization of sweet potato leaf curl virus isolate from china (splcv-cn) and its phylogenetic relationship with other members of the geminiviridae. | a sweet potato-infecting sweet potato leaf curl virus (splcv) isolated in china was detected by polymerase chain reaction (pcr). pcr products amplified from dna-a were cloned and sequenced. the isolates of splcv from china(splcv-cn)has a genome organization similar to that of monopartite begomoviruses. the dna-a had two orfs (av1 and av2) in the virion sense and four orfs (ac1, ac2, ac3, and ac4) in the complementary sense, separated by an intergenic region (ir) containing a conserved stem-loop ... | 2007 | 17318425 |
| effects of purple sweet potato anthocyanins on development and intracellular redox status of bovine preimplantation embryos exposed to heat shock. | the development of cleavage stage preimplantation embryos is disrupted by exposure to heat shock, such as high temperatures in the summer season. in this study, we investigated whether addition of anthocyanins, which are strong scavengers of reactive oxygen species (ros), improves development and intracellular redox status of heat-exposed bovine preimplantation embryos by reduction of heat shock-derived oxidative stress. after in vitro fertilization (ivf), embryos were cultured at 38.5 c through ... | 2007 | 17325453 |
| growth inhibition and induction of apoptosis in nb4 promyelocytic leukemia cells by trypsin inhibitor from sweet potato storage roots. | the objective of this study was to investigate the antiproliferative effect and the mechanism of trypsin inhibitor (ti) from sweet potato [ipomoea batatas (l.) lam. 'tainong 57'] storage roots on nb4 promyelocytic leukemia cells. the results showed that ti inhibited cellular growth of nb4 promyelocytic leukemia cells in a time-dependent and dose-dependent manner, and treatment for 72 h induced a marked inhibition of cellular growth, showing an ic50 of 57.1 +/- 8.26 microg/ml. ti caused cell cycl ... | 2007 | 17328557 |
| the mi-1-mediated pest resistance requires hsp90 and sgt1. | the tomato (solanum lycopersicum) mi-1 gene encodes a protein with putative coiled-coil nucleotide-binding site and leucine-rich repeat motifs. mi-1 confers resistance to root-knot nematodes (meloidogyne spp.), potato aphids (macrosiphum euphorbiae), and sweet potato whitefly (bemisia tabaci). to identify genes required in the mi-1-mediated resistance to nematodes and aphids, we used tobacco rattle virus (trv)-based virus-induced gene silencing (vigs) to repress candidate genes and assay for nem ... | 2007 | 17351050 |
| triterpene saponin hemi-biosynthesis of a leaf beetle's (platyphora kollari) defensive secretion. | the adults of the leaf beetle platyphora kollari (chrysomelidae) are able to metabolise the oleanane triterpene beta-amyrin (1) into the glycoside 3-o-beta-d: -glucopyranosyl-(1-->4)-beta-d: -glucuronopyranosyl-hederagenin (2) that is stored in their defensive glands. the aim of this study was to test the hypothesis that oleanolic acid (3) is an intermediate in the conversion of 1 into 2 and to check whether the sequestration of pentacyclic triterpenes is selective in favour of beta-amyrin (1). ... | 2007 | 17354008 |
| [a new species of thrip, genus frankliniella (group cephalica; thysanoptera: thripidae) from costa rica]. | a new species of the frankliniella cephalica group, from central costa rica, is described under the name "frankliniella morerai n.sp.". it is closely related to frankliniella sandovalensis. both species have translucent bodies, but the new species can be distinguished by these characteristics: setae io ii in position 1/2, a complete comb on abdominal segment viii, antennal segments without coloration and setae po iv longer. it was found in low density in crops of chilli, tomato, lettuce, sweet p ... | 2007 | 17354432 |
| simultaneous overexpression of both cuzn superoxide dismutase and ascorbate peroxidase in transgenic tall fescue plants confers increased tolerance to a wide range of abiotic stresses. | to mitigate the oxidative damage inflicted by biotic or abiotic stresses, plants have evolved complex anti-oxidative defense mechanisms that involve induction of antioxidant and anti-oxidative enzymes, such as superoxide dismutase (sod) and ascorbate peroxidase (apx). to determine whether overexpression of the genes encoding copper-zinc sod (cuznsod) and apx in plants is capable of decreasing reactive oxygen species (ros) produced in response to abiotic stresses, we generated transgenic tall fes ... | 2007 | 17360071 |
| lactic acid fermentation of beta-carotene rich sweet potato (ipomoea batatas l.) into lacto-juice. | lacto-juices processed by lactic acid fermentation bring about a change in the beverage assortment for their high nutritive value, vitamins and minerals which are beneficial to human health when consumed. sweet potato roots (non-boiled/ fully-boiled) were fermented with lactobacillus plantarum mtcc 1407 at 28 +/- 2 degrees c for 48 h to make lacto- juice. during fermentation both analytical [ph, titratable acidity, lactic acid, starch, total sugar, reducing sugar (g/kg roots), total phenol and b ... | 2007 | 17370124 |
| sweet potato: a review of its past, present, and future role in human nutrition. | the overall objective of this chapter is to review the past, present, and future role of the sweet potato (ipomoea batatas [l.] lam) in human nutrition. specifically, the chapter describes the role of the sweet potato in human diets; outlines the biochemical and nutritional composition of the sweet potato with emphasis on its beta-carotene and anthocyanin contents; highlights sweet potato utilization, and its potential as value-added products in human food systems; and demonstrates the potential ... | 2007 | 17425943 |
| assessment of risk of introduction of cylas formicarius elegantulus (coleoptera: brentidae) into weevil-free areas in the southern united states. | we assessed the risk associated with introduction of sweet potato weevil, cylas formicarius elegantulus (summers) (coleoptera: brentidae), from infested areas to noninfested areas via shipment of sweet potato, ipomoea batatas (l.), roots within the southern united states. our study quantifies the effectiveness of risk mitigation procedures of sweet potatoes before shipment in relation to introduction of the weevil. the risk assessment relied on literature and expert information to determine appr ... | 2007 | 17461052 |
| resistance of sweetpotato genotypes to adult diabrotica beetles. | production of sweetpotatoes, ipomoea batatas (l.) lam. (convolvulaceae), is limited by several insect pests, including diabrotica spp. (coleoptera: chrysomelidae), and new integrated pest management (ipm) techniques for this crop are needed. host plant resistance is one attractive approach that fits well into ipm programs. a host plant resistance research program typically depends on reliable bioassay procedures to streamline evaluation of germplasm. thus, a bioassay technique was developed for ... | 2007 | 17461084 |
| carotenoids with a 5,6-dihydro-5,6-dihydroxy-beta-end group, from yellow sweet potato "benimasari", ipomoea batatas lam. | a series of carotenoids with a 5,6-dihydro-5,6-dihydroxy-beta-end group, named ipomoeaxanthins a (1), b (2), c1 (3) and c2 (4) were isolated from the flesh of yellow sweet potato "benimasari", ipomoea batatas lam. their structures were determined to be (5r,6s,3'r)-5,6-dihydro-beta,beta-carotene-5,6,3'-triol (1), (5r,6s,5'r,6's)-5,6,5',6'-tetrahydro-beta,beta-carotene-5,6,5'6'-tetrol (2), (5r,6s,5'r,8'r)-5',8'-epoxy-5,6,5',8'-tetrahydro-beta,beta-carotene-5,6-diol (3), and (5r,6s,5'r,8's)-5',8'-e ... | 2007 | 17466348 |
| effects of dietary administration of plant-derived anthocyanin-rich colors to spontaneously hypertensive rats. | anthocyanins have beneficial effects such as free radical scavenging activity. we investigated the effects of continuous administration of colors from purple corn (pcc), purple sweet potato (psc) and red radish (rrc) to spontaneously hypertensive rats (shr). these are rich in anthocyanins. animals were fed with diets containing pcc, psc or rrc (1 mass% of diets) for 15 wk. while the body weight and the daily food intake of administered rats were not different from those of the non-administered c ... | 2007 | 17484387 |
| batatins i and ii, ester-type dimers of acylated pentasaccharides from the resin glycosides of sweet potato. | batatins i (1) and ii (2), two ester-type dimers of acylated pentasaccharides, have been isolated by recycling hplc from the hexane-soluble extract of sweet potato (ipomoea batatas var. batatas). the structures were elucidated by a combination of high-resolution nmr spectroscopy and mass spectrometry. complete analysis and unambiguous assignments of the 1h and 13c nmr spectra of 1 and 2 were achieved by 2d shift correlation measurements. the glycosidic acid forming each branched pentasaccharide ... | 2007 | 17488129 |
| cytosine methylation is associated with rna silencing in silenced plants but not with systemic and transitive rna silencing through grafting. | rna silencing is often associated with methylation of the target gene. the dna methylation level of transgenes was investigated in post-transcriptionally silenced or non-silenced nicotiana benthamiana carrying either the 5' region (200 or 400 bp) or the entire region of the coat protein gene (cp, including the 3' non-translated region) of sweet potato feathery mottle virus. higher levels of transgene cytosine methylation were observed in both symmetrical (cpg, cpnpg) and non-symmetrical (cphph) ... | 2007 | 17521830 |
| effects of anthocyanin-rich purple potato flakes on antioxidant status in f344 rats fed a cholesterol-rich diet. | we examined the antioxidant effects of polyphenol/anthocyanin-rich potato (solanum tuberosum cv. shadow-queen) flakes in male rats fed a high-cholesterol diet. the rats were served either a high-cholesterol (0.5% cholesterol plus 0.125% sodium cholate) diet, or a high-cholesterol diet containing a mixture of 243 g alpha-maize starch/kg supplemented with one of the following (per kg diet): 300 g medium purple potato (shadow-queen), 300 g white potato (solanum tuberosum cv. toyoshiro) or 300 g dar ... | 2007 | 17559701 |
| bone and faecal minerals and scanning electron microscopic assessments of femur in rats fed phytic acid extract from sweet potato (ipomoea batatas). | phytic acid was extracted from sweet potato (ipomoea batatas) and fed to wistar rats with or without zinc for 3 weeks. animals were then sacrificed and bone and faecal minerals were assessed. the ultra-structure of the bones was examined via scanning electron microscopy. phytic acid extract or commercial phytic acid supplemented diets (d + zn + pe or d + pe) displayed reduced bone calcium levels (101.27 +/- 59.11 and 119.27 +/- 45.36 g/kg) compared to the other test groups. similarly, reduced ca ... | 2008 | 17562130 |
| inhibition of reactive nitrogen species in vitro and ex vivo by trypsin inhibitor from sweet potato 'tainong 57' storage roots. | peroxynitrite (onoo-), formed from a reaction of superoxide and nitric oxide, is one of the most potent cytotoxic species known to oxidize cellular constituents including essential proteins, lipids, and dna. onoo- induces cellular and tissue injury, resulting in several human diseases such as alzheimer's disease, atherosclerosis, and stroke. due to the lack of endogenous enzymes responsible for onoo- scavenging activity, finding a specific onoo- scavenger is of considerable importance. in this s ... | 2007 | 17602566 |
| inhibition of the gene expression for granule-bound starch synthase i by rna interference in sweet potato plants. | granule-bound starch synthase i (gbssi) is one of the key enzymes catalyzing the formation of amylose, a linear alpha(1,4)d-glucan polymer, from adp-glucose. amylose-free transgenic sweet potato plants were produced by inhibiting sweet potato gbssi gene expression through rna interference. the gene construct consisting of an inverted repeat of the first exon separated by intron 1 of gbssi driven by the camv 35s promoter was integrated into the sweet potato genome by agrobacterium tumefaciens-med ... | 2007 | 17622537 |
| global relationships of bemisia tabaci (hemiptera: aleyrodidae) revealed using bayesian analysis of mitochondrial coi dna sequences. | bemisia tabaci (gennadius) (hemiptera: aleyrodidae) is a species complex that is one of the most devastating agricultural pests worldwide and affects a broad range of food, fiber and ornamental crops. unfortunately, using parsimony and neighbor joining methods, global phylogenetic relationships of the major races/biotypes of b. tabaci remain unresolved. aside from the limitations of these methods, phylogenetic analyses have been limited to only small subsets of the global collection of b. tabaci ... | 2007 | 17627853 |
| improved metabolic control by ipomoea batatas (caiapo) is associated with increased adiponectin and decreased fibrinogen levels in type 2 diabetic subjects. | the extract of the white-skinned sweet potato ipomoea batatas (caiapo) has been shown to ameliorate glucose control by improving insulin sensitivity in patients with type 2 diabetes mellitus (t2dm). the present study was designed to further evaluate its mode of action on insulin sensitivity over an extended period of time as well as the effects on fibrinogen and other markers of low-grade inflammation. | 2008 | 17645559 |
| biotype-dependent secondary symbiont communities in sympatric populations of bemisia tabaci. | the sweet potato whitefly, bemisia tabaci, harbors portiera aleyrodidarum, an obligatory symbiotic bacterium, as well as several secondary symbionts including rickettsia, hamiltonella, wolbachia, arsenophonus, cardinium and fritschea, the function of which is unknown. bemisia tabaci is a species complex composed of numerous biotypes, which may differ from each other both genetically and biologically. only the b and q biotypes have been reported from israel. secondary symbiont infection frequenci ... | 2007 | 17645822 |
| localization of sweet potato chlorotic stunt virus (spcsv) in synergic infection with potyviruses in sweet potato. | among diseases reported worldwidely for sweet potato (ipomoea batatas (l) lam) crop, one of the most frequent is the sweet potato virus disease (spvd), caused by sweet potato chlorotic stunt virus (spcsv) and sweet potato feathery mottle virus (spfmv) co-infection. in argentina, there exists the sweet potato chlorotic dwarf (spcd), a sweet potato disease caused by triple co-infection with spcsv, spfmv and sweet potato mild speckling virus (spmsv). both diseases cause a synergism between the poty ... | 2007 | 17665636 |
| [the effect of infection by fusarium solani f. sp. batatas on endogenous hormone levels in sweet potato seedling]. | the endogenous hormone aba concentrations increased in the leaves, shoots and roots of sweet potato plants infected with fusarium solani f. sp. batatas (fsb) or treated by its culture filtrate. the accumulation of aba occurred firstly in the roots, but the highest concentration was in the shoots. the endogenous ga(1/3) concentration of leaves, shoots and roots of infected sweet potato kept at markedly low levels during the period of experiments.the aba concentration of sweet potato seedlings inc ... | 2007 | 17675755 |
| co-producing lipopeptides and poly-gamma-glutamic acid by solid-state fermentation of bacillus subtilis using soybean and sweet potato residues and its biocontrol and fertilizer synergistic effects. | a bacillus subtilis strain b6-1, previously isolated from the rhizosphere of vegetable, selectively produced antibiotics or poly-gamma-glutamic acid (gamma-pga) in two kinds of liquid media and their co-productions were obtained when using soybean and sweet potato residues in solid-state fermentation. the antibiotics were purified and identified as fengycins. after these residue cultures were introduced, cucumber wilts were effectively suppressed. the introduction also significantly increased th ... | 2008 | 17681465 |
| effect of synthetic polylysine on fungi. | the synthetic, basic poly-alpha-amino acid, polylysine, had antifungal activity against plant pathogens (three strains of fusaria, three isolates of verticillia, and ceratocystis fimbriata) and against the human pathogens (trichophyton mentagrophytes, t. rubrum, and candida albicans) in vitro. it inhibited penetration of ceratocystis fimbriata on sweet potato slices. polylysine inhibited the infection of tomato cuttings by flsarium oxysporum f. lycopersici, but it was also toxic to the plants. | 1960 | 17747266 |
| monoclonal antibodies against the aster yellows agent. | hybridoma clones secreting specific monoclonal antibodies against the aster yellows agent, a mycoplasma-like organism, were produced by using partially purified salivary gland preparations from infected leafhopper vectors as the immunogen. after 3947 hybridomas from 20 independent fusions were screened for specific antibody against the aster yellows agent, two table clones were obtained. with these monoclonal antibodies the aster yellows agent in diseased lettuce, periwinkles, and inoculative in ... | 1985 | 17757867 |
| diversity and evolutionary relationship of nucleotide binding site-encoding disease-resistance gene analogues in sweet potato (ipomoea batatas lam.). | most plant disease-resistance genes (r-genes) isolated so far encode proteins with a nucleotide binding site (nbs) domain and belong to a superfamily. nbs domains related to r-genes show a highly conserved backbone of an amino acid motif, which makes it possible to isolate resistance gene analogues (rgas) by degenerate primers. degenerate primers based on the conserved motif (p-loop and glpl) of the nbs domain from r -genes were used to isolate rgas from the genomic dna of sweet potato cultivar ... | 2007 | 17762144 |
| transmission of internal cork of sweet potato by the cotton aphid, aphis gossypii glover. | 1958 | 17781179 | |
| melanesian prehistory: some recent advances. | human occupation of new guinea had begun 50,000 years ago, but islands further east were settled only in recent times. in part of the new guinea highlands, wet and dry horticultural systems began by 9000 years ago. local intensification is evident until the present, but only the most recent major crop (sweet potato, which has been grown in the region for less than 300 years) is documented. on the south coast, exchange systems and economies locally diversify over the last two millennia. in the me ... | 1980 | 17795991 |
| content and in-vitro accessibility of pro-vitamin a carotenoids from sri lankan cooked non-leafy vegetables and their estimated contribution to vitamin a requirement. | vitamin a deficiency is a public health problem in sri lanka, which affects especially pre-school children. carrots (daucus carota), pumpkins (cucurbita maxima), squashes (cucurbita moschata) and sweet potatoes (ipomoea batatas) of orange, yellow-fleshed varieties are good sources of provitamin a carotenoids, but have not been studied in sri lanka in terms of the food as eaten. the content of carotenoids in each preparation method and the in-vitro accessibility of beta-carotene and alpha-caroten ... | 2007 | 17852483 |
| differential expression of 10 sweetpotato peroxidases in response to sulfur dioxide, ozone, and ultraviolet radiation. | secretory class iii plant peroxidase (pod, ec 1.11.1.7) is believed to function in diverse physiological processes, including responses to various environmental stresses. to understand the function of each pod in terms of air pollutants and uv radiation, changes in pod activity and expression of 10 pod genes isolated from cell cultures of sweetpotato (ipomoea batatas) were investigated in the leaves of sweetpotato after treatment with sulfur dioxide (so(2) 500ppb, 8h/day for 5 days), ozone (o(3) ... | 2007 | 17870589 |
| total phenolics and antioxidant capacity of indigenous vegetables in the southeast united states: alabama collaboration for cardiovascular equality project. | collard greens, mustard greens, kale, okra, green onion, butter beans, butter peas, purple hull peas, rutabagas, and eggplant are frequently consumed by african americans in the southeast united states. sweet potato greens and purslane are two novel vegetables in this region. the objective of this study was to analyze total phenolics and antioxidant capacity in these indigenous vegetables. the total phenolic content was analyzed using the folin-ciocalteu method and ranged from 7.4 to 53.5 mg gal ... | 2007 | 17886092 |
| identification and sequence analysis of potyviruses infecting crops in vietnam. | fifty-two virus isolates from 13 distinct potyvirus species infecting crops in vietnam were identified and the 3' region of each genome was sequenced. the viruses were: bean common mosaic virus (bcmv), potato virus y (pvy), sugarcane mosaic virus (scmv), sorghum mosaic virus (srmv), chilli veinal mottle virus (chivmv), zucchini yellow mosaic virus (zymv), leek yellow stripe virus (lymv), shallot yellow stripe virus (sysv), onion yellow dwarf virus (oydv), turnip mosaic virus (tumv), dasheen mosa ... | 2008 | 17906829 |
| purification, cloning and characterization of a novel peroxidase isozyme from sweetpotatoes (ipomoea batatas). | an anionic peroxidase from sweetpotato tubers is purified and characterized. the isozyme ibprx15 is purified to homogeneity by affinity chromatography using a concanavalin a column. the isoelectric point was determined to pi 4.9. maldi-ms detected a singly charged molecule with a mass of 42029 da. absorption spectra of ibprx15 compounds i, ii and iii were obtained after treatment with h(2)o(2) at room temperature. comparative data of ibprx15 on substrate specificity to tobacco anionic peroxidase ... | 2007 | 17936696 |
| nutritional and safety assessments of foods and feeds nutritionally improved through biotechnology: lysine maize as a case study. | during the last decade, the area of biotech crops modified for agronomic input traits (e.g., herbicide tolerance and insect protection) has increased to 90 million halyear, grown by over 8 million farmers in a total of 17 countries. as adoption of these improved agronomic trait biotech crops has grown, so has interest in biotech crops that have improved nutritional characteristics for use as feed and food. a previous publication by the international life sciences institute (ilsi) reported on the ... | 2007 | 17955996 |
| calcium influxes and mitogen-activated protein kinase kinase activation mediate ethylene inducing ipomoelin gene expression in sweet potato. | the ipomoelin gene (ipo) was identified to be a wound-inducible gene from ipomoea batatas, and its expression was stimulated by methyl jasmonate (meja) and hydrogen peroxide. ipo protein was also characterized as a defence-related protein, and it is also a carbohydrate-binding protein. in this study, the expression of ipo was used as a molecular probe to study the effects of ca2+ on the signal transduction of ethylene. a confocal microscope monitored the ca2+ within cells, and northern blotting ... | 2008 | 17971062 |
| novel galactolipids from the leaves of ipomoea batatas l.: characterization by liquid chromatography coupled with electrospray ionization-quadrupole time-of-flight tandem mass spectrometry. | sixteen novel and ten known galactolipids have been isolated and characterized from the leaves of ipomoea batatas l. (sweet potato) using an analytical method based on high-performance liquid chromatography coupled with electrospray ionization-quadrupole time-of-flight tandem mass spectrometry. using this technique, the structures and regiochemistries of the fatty acyl groups and the positions of the double bonds on the acyl chains were determined. sugar moieties were identified by analysis of o ... | 2007 | 17988089 |
| methodology optimization for quantification of total phenolics and individual phenolic acids in sweetpotato (ipomoea batatas l.) roots. | phenolic acids are one of the several classes of naturally occurring antioxidant compounds found in sweetpotatoes. simplified, robust, and rapid methodologies were optimized to quantify total and individual phenolic acids in sweetpotato roots. total phenolic acid content was quantified spectrophotometrically using both folin-denis and folin-ciocalteu reagents. the folin-ciocalteu reagent gave an overestimation of total phenolic acids due to the absorbance of interfering compounds (that is, reduc ... | 2007 | 17995640 |
| molecular characterization of a cdna encoding dre-binding transcription factor from dehydration-treated fibrous roots of sweetpotato. | a new dehydration responsive element-binding (dreb) protein gene encoding for an ap2/erebp-type transcription factor was isolated by screening of the cdna library for dehydration-treated fibrous roots of sweetpotato (ipomoea batatas). its cdna (referred to as swdreb1) fragment of 1206bp was sequenced from, which a 257 amino acid residue protein was deduced with a predicted molecular weight of 28.17kda. a search of the protein blast database revealed that this protein can be classified as a typic ... | 2008 | 18006323 |
| changes in polyphenolic content and radical-scavenging activity of sweet potato (ipomoea batatas l.) during storage at optimal and low temperatures. | polyphenolic content and radical-scavenging activities (rsa) of four sweet potato (ipomoea batatas l.) cultivars were characterized after storage at optimal (15 degrees c) or low temperature (5 degrees c) for 0, 13, 26, and 37 days. the polyphenolic content increased during storage in three cultivars but not in 'murasakimasari'. the change in 1,1-diphenyl-2-picrylhydrazyl radical-scavenging activity (dpph-rsa) correlated very well with polyphenolic content. the increases in polyphenolics and the ... | 2007 | 18038989 |
| sweet potatoes (ipomoea batatas). | 1949 | 18132268 | |
| the partial purification and properties of antibiotic substances from the sweet potato plant (ipomoea batatas). | 1949 | 18138318 | |
| glycosylation of hesperetin by plant cell cultures. | the biotransformation of hesperetin by cultured cells of ipomoea batatas and eucalyptus perriniana was investigated. three glycosides, hesperetin 3'-o-beta-d-glucopyranoside (33 microg/g fr. wt of cells), hesperetin 3',7-o-beta-d-diglucopyranoside (217 microg/g fr. wt of cells), and hesperetin 7-o-[6-o-(beta-d-glucopyranosyl)]-beta-d-glucopyranoside (beta-gentiobioside, 22 microg/g fr. wt of cells), together with three hitherto known glycosides, hesperetin 5-o-beta-d-glucopyranoside (23 microg/g ... | 2008 | 18160083 |
| molecular variability of sweet potato feathery mottle virus and other potyviruses infecting sweet potato in peru. | several potyviruses are found infecting sweet potato (ipomoea batatas) in peru, of which sweet potato feathery mottle virus (spfmv, genus potyvirus) is the most common. however, sequence data for these viruses are not available from peru. in this study, the 3'-terminal approximately 1,800 nucleotide sequences of 17 potyvirus samples collected from the six main sweet potato-producing areas of peru over the past 20 years were determined and analyzed. results of sequence comparisons and phylogeneti ... | 2008 | 18172571 |
| suspected sweet potato poisoning in cattle in the uk. | 2008 | 18192661 | |
| analysis of gene content in sweet potato chlorotic stunt virus rna1 reveals the presence of the p22 rna silencing suppressor in only a few isolates: implications for viral evolution and synergism. | sweet potato chlorotic stunt virus (genus crinivirus) belongs to the family closteroviridae, members of which have a conserved overall genomic organization but are variable in gene content. in the bipartite criniviruses, heterogeneity is pronounced in the 3'-proximal region of rna1, which in sweet potato chlorotic stuat virus (spcsv) encodes two novel proteins, rnase3 (rnase iii endonuclease) and p22 (rna silencing suppressor). this study showed that two ugandan spcsv isolates contained the p22 ... | 2008 | 18198389 |
| historical evidence for a pre-columbian presence of datura in the old world and implications for a first millennium transfer from the new world. | datura (solanaceae)is a small genus of plants that,for long, was thought to occur naturally in both the new and old worlds. however, recent studies indicate that all species in the genus originated in the americas. this finding has prompted the conclusion that no species of datura could have been present in the old world prior to its introduction there by europeans in the early 16th century ce. further, the textual evidence traditionally cited in support of a pre-columbian old world presence of ... | 2007 | 18202447 |
| overexpression of sweetpotato swpa4 peroxidase results in increased hydrogen peroxide production and enhances stress tolerance in tobacco. | plant peroxidases (pod) reduce hydrogen peroxide (h(2)o(2)) in the presence of an electron donor. extracellular pod can also induce h(2)o(2) production and may perform a significant function in responses to environmental stresses via the regulation of h(2)o(2) in plants. we previously described the isolation of 10 pod cdna clones from cell cultures of sweetpotato (ipomoea batatas). among them, the expression of the swpa4 gene was profoundly induced by a variety of abiotic stresses and pathogenic ... | 2008 | 18224366 |
| expression of class i knotted1-like homeobox genes in the storage roots of sweetpotato (ipomoea batatas). | as a first step in clarifying the involvement of class i knotted1-like homeobox (knoxi) genes in the storage root development of sweetpotato (ipomoea batatas), we isolated three knoxi genes, named ibkn1, ibkn2 and ibkn3, expressed in the storage roots. phylogenetic analysis showed that ibkn1 was homologous to the shoot meristemless (stm) gene of arabidopsis, while ibkn2 and ibkn3 were homologous to the brevipedicellus (bp) gene. of these, expression of ibkn1 and ibkn2 were upregulated in develop ... | 2008 | 18242774 |
| effect of genotype, gelling agent, and auxin on the induction of somatic embryogenesis in sweet potato (ipomoea batatas lam.). | lateral buds of six cultivars of sweet potato were induced to form embryogenic callus in a culture medium solidified with two types of gelling agents, agar or gelrite, and supplemented with various concentrations of auxins, 2,4-d, 2,4,5-t and picloram. of the six cultivars screened, only three gave an embryogenic response. best results with an average of 3.53% embryogenic response were obtained with the medium solidified with agar, while in gelrite only 0.45% of lateral buds gave rise to embryog ... | 2008 | 18280985 |
| inherited intracellular ecosystem: symbiotic bacteria share bacteriocytes in whiteflies. | symbiotic relationships with bacteria are common within the arthropoda, with interactions that substantially influence the biology of both partners. the symbionts' spatial distribution is essential for understanding key aspects of this relationship, such as bacterial transmission, phenotype, and dynamics. in this study, fluorescence in situ hybridization was used to localize five secondary symbionts from various populations and biotypes of the sweet potato whitefly bemisia tabaci: hamiltonella, ... | 2008 | 18285399 |
| six peptide wound signals derived from a single precursor protein in ipomoea batatas leaves activate the expression of the defense gene sporamin. | a mixture of three homologous bioactive hydroxyproline-rich glycopeptides (hypsys peptides) of 18 amino acids in length, differing only at two residues, was isolated from leaves of ipomoea batatas, the common sweet potato. one of the peptides represented over 95% of the isolated isopeptides, which, at 2.5 nm concentration, induced the expression of sporamin, a major defense protein of i. batatas. the sequence of the major isoform was used to synthesize a primer that identified a cdna encoding a ... | 2008 | 18299332 |
| [study on content and intake status of vegetable fiber in rural residents in china]. | to study the distribution and intake of vegetable fiber of chinese rural residents. | 2007 | 18303630 |
| purple sweet potato color repairs d-galactose-induced spatial learning and memory impairment by regulating the expression of synaptic proteins. | purple sweet potato color (pspc), a class of naturally occurring anthocyanins used to color food (e163), has been reported to possess a variety of biological activities, including anti-oxidant, anti-tumor, and anti-inflammatory. the effect of pspc on the spatial learning and memory of mice treated with d-galactose (d-gal) was evaluated by the morris water maze; d-gal-treated mice had decreased performance compared with mice in the vehicle and pspc groups, while the pspc+d-gal group showed signif ... | 2008 | 18316211 |
| learning from others' mistakes in capuchin monkeys (cebus apella). | we investigated whether tufted capuchin monkeys (cebus apella) learn from others' mistakes. we prepared three kinds of transparent containers having the same appearance: one that could be opened by the lid, one that could be opened from the bottom, and one that could be opened either way. using each of the first two one-way-open type containers, the monkeys were trained to copy the human demonstrator's action to open the container and obtain a piece of sweet potato contained therein. after this ... | 2008 | 18320243 |
| expression of modified gene encoding functional human alpha-1-antitrypsin protein in transgenic tomato plants. | transgenic plants offer promising alternative for large scale, sustainable production of safe, functional, recombinant proteins of therapeutic and industrial importance. here, we report the expression of biologically active human alpha-1-antitrypsin in transgenic tomato plants. the 1,182 bp cdna sequence of human aat was strategically designed, modified and synthesized to adopt codon usage pattern of dicot plants, elimination of mrna destabilizing sequences and modifications around 5' and 3' fla ... | 2008 | 18320339 |
| ether-soluble resin glycosides from the roots of ipomoea batatas. | two new resin glycosides, batataosides i (1) and ii (2), and five known compounds, friedelin (3), scopoletin (4), octadecyl caffeate (5), beta-sistosterol (6) and daucosterol (7), were isolated from the roots of ipomoea batatas. their structures have been determined based on the chemical and spectral data. batataosides i and ii have novel structures because the core simonic acid b was esterised with cinnamic acid for the first time, and three different substituent esterification groups in one re ... | 2013 | 18335340 |