Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| molecular cloning and expression characteristics of alternative oxidase gene of cotton (gossypium hirsutum). | a novel alternative oxidase (aox) gene derived from cotton (gossypium hirsutum), designated as ghaox1, was cloned with race-pcr. the full-length cdna of ghaox1was 1,298 bp in size, containing a 996 bp open reading frame (orf) which corresponds to a precursor protein of 332 amino acid residues with a calculated molecular mass of 37.5 kda. the predicted amino acid sequence exhibited 68.4%, 68.1%, 59.4%, and 69.8% homology to the alternative oxidases of arabidopsis thaliana, nicotiana tabacum, sola ... | 2008 | 17351819 |
| common subtropical and tropical nonpollen food sources of the boll weevil (coleoptera: curculionidae). | it is known that substantial boll weevil, anthonomus grandis grandis boheman, individuals can survive mild subtropical winters in some habitats, such as citrus orchards. our study shows that endocarp of the fruit from prickly pear cactus, opuntia engelmannii salm-dyck ex. engel.; orange, citrus sinensis l. osbeck.; and grapefruit, citrus paradisi macfad., can sustain newly emerged adult boll weevils for >5 mo, which is the duration of the cotton-free season in the subtropical lower rio grande va ... | 2007 | 17349122 |
| detection and identification of rhamnogalacturonan lyase activity in intercellular spaces of expanding cotton cotyledons. | rhamnogalacturonan lyase (rg lyase) activity has been detected and its relative activity measured in vivo during the expansion of cotton (gossypium hirsutum l.) cotyledons. rhamnogalacturonan (rg) oligomers labeled with a fluorescent tag were injected into the intercellular spaces of cotton cotyledons and, after incubation, the digested substrate was rinsed out. enzyme digestion products were detected and identified by capillary zone electrophoresis. rhamnogalacturonan lyase products were identi ... | 2007 | 17346264 |
| cloning and characterization of cotton ghbg gene encoding beta-glucosidase. | beta-1,4-glucosidase (bg, ec3.2.1.21), one of three cellulases, is a widespread family of enzymes involved in the metabolism of cell wall polysaccharides in both prokaryocytes and eukaryotes. here, we report the isolation of a full-length cdna encoding beta-1,4-glucosidase protein (designated as ghbg) and its putative function in the process of fiber development and in yeast. through random sequencing of the cotton fiber cdna library from 7235 germplasm line, with elite fiber quality in gossypiu ... | 2006 | 17343209 |
| a quantitative method for the determination of cyclopropenoid fatty acids in cottonseed, cottonseed meal, and cottonseed oil (gossypium hirsutum) by high-performance liquid chromatography. | cyclopropenoid fatty acids (cpfas), found in cottonseed, have been shown to have detrimental health effects to susceptible livestock. previous quantitative analytical methods for the determination of cpfas expressed these acids in terms of their relative abundance with respect to other fatty acids in the oil, necessitating the concurrent analysis of other fatty acids. the proposed analytical method describes the quantitation of three relevant cpfas for cotton (malvalic acid, sterculic acid, and ... | 2007 | 17323967 |
| characterization and expression of a putative retinoblastoma protein binding gene from gossypium hirsutum. | a genomic clone representing a putative retinoblastoma binding (rbb) protein was isolated from a gossypium hirsutum bac library. alignment of the gene sequence with the cdna sequence indicated the gene consists of six exons that have standard eukaryotic splice junctions. the conceptual spliced transcript was 98% identical to tc37171 in the tigr gene index, however it encoded an orf 107 amino acids longer than best deduced protein from tc37171. the conceptual translation of the genomic clone was ... | 2006 | 17312951 |
| expression of cp4 epsps in microspores and tapetum cells of cotton (gossypium hirsutum) is critical for male reproductive development in response to late-stage glyphosate applications. | plants expressing agrobacterium sp. strain cp4 5-enolpyruvylshikimate-3-phosphate synthase (cp4 epsps) are known to be resistant to glyphosate, a potent herbicide that inhibits the activity of the endogenous plant epsps. the rr1445 transgenic cotton line (current commercial line for roundup ready cotton) was generated using the figwort mosaic virus (fmv) 35s promoter to drive the expression of the cp4 epsps gene, and has excellent vegetative tolerance to glyphosate. however, with high glyphosate ... | 2006 | 17309724 |
| transgenic cotton over-producing spinach sucrose phosphate synthase showed enhanced leaf sucrose synthesis and improved fiber quality under controlled environmental conditions. | prior data indicated that enhanced availability of sucrose, a major product of photosynthesis in source leaves and the carbon source for secondary wall cellulose synthesis in fiber sinks, might improve fiber quality under abiotic stress conditions. to test this hypothesis, a family of transgenic cotton plants (gossypium hirsutum cv. coker 312 elite) was produced that over-expressed spinach sucrose-phosphate synthase (sps) because of its role in regulation of sucrose synthesis in photosynthetic a ... | 2007 | 17287885 |
| rapid development of enhanced atrazine degradation in a dundee silt loam soil under continuous corn and in rotation with cotton. | mississippi delta cotton (gossypium hirsutum l.) production in rotation with corn (zea mays l.) was evaluated in field experiments from 2000 to 2005 at stoneville, mississippi. plots maintained under minimum tillage were established in 2000 on a dundee silt loam with treatments including continuous cotton or corn and alternate cotton-corn rotations. mineralization and dissipation of 14c [ring]-labeled atrazine were evaluated in the laboratory on soils collected prior to herbicide application in ... | 2007 | 17263485 |
| genetic lengths and break points in twelve chromosomes of gossypium hirsutum involved in ten reciprocal translocations. | chromosome configurations were recorded in about 5500 pollen mother cells (pmc's) in 2n and 2n-1 (missing the intact a-genome chromosome) heterozygotes of ten reciprocal translocations involving six a-genome chromosomes (h1, h2, h3, h4, h6 and h7) and six d-genome chromosomes (h14, h15, h16, h19, h20 and h21) of gossypium hirsutum. from these records, chiasma frequencies at each of six positions were determined for nine translocations and at two positions for one. these frequencies were used to ... | 1978 | 17248811 |
| alternate-1 and alternate-2 disjunctions in heterozygous reciprocal translocations. | alternate-1 and alternate-2 orientation of chromosomes, as well as the two types of adjacent orientation, were observed cytologically in the ring configurations of three reciprocal translocation heterozygotes of gossypium hirsutum l. the observations indicate that the two types of alternate orientation should be characteristic of ring-forming translocations. | 1974 | 17248653 |
| genetical studies concerning the distribution of trichomes on the leaves of gossypium hirsutum l. | 1968 | 17248422 | |
| the inheritance of gossypol level in gossypium i. additive, dominance, epistatic, and maternal effects associated with seed gossypol in two varieties of gossypium hirsutum l. | 1968 | 17248408 | |
| the anomalous behavior of the ghost spot of gossypium anomalum in amphidiploid gossypium hirsutum. | 1965 | 17248255 | |
| tests for the association of marker loci with chromosomes in gossypium hirsutum by the use of aneuploids. | 1965 | 17248254 | |
| the genetics of flowering response in cotton. v. fruiting behavior of gossypium hirsutum and gossypium barbadense in interspecific hybrids. | 1965 | 17248253 | |
| genetic analysis of six primary monosomes and one tertiary monosome in gossypium hirsutum. | 1963 | 17248191 | |
| the genetics of flowering response in cotton. iv. quantitative analysis of photoperiodism of texas 86, gossypium hirsutum race latifolium, in a cross with an inbred line of cultivated american upland cotton. | 1962 | 17248135 | |
| the genetics of flowering response in cotton. iii. fruiting behavior of gossypium hirsutum race latifolium in a cross with a variety of cultivated american upland cotton. | 1961 | 17248048 | |
| the genetics of flowering response in cotton. i. fruiting behavior of gossypium hirsutum var. marie-galante in a cross with a variety of cultivated american upland cotton. | 1957 | 17247711 | |
| viable deficiency-duplications from a translocation in gossypium hirsutum. | 1952 | 17247415 | |
| the transmission of marker genes in intraspecific backcrosses of gossypium hirsutum l. | 1952 | 17247397 | |
| transmission of duplication-deficiencies from cotton translocations is unrelated to map lengths of the unbalanced segments. | adjacent-1 duplication-deficiencies (dp-dfs) are readily recovered from most heterozygous translocations in gossypium hirsutum l., but frequencies of specific cytotypes differ widely in progenies from heterozygote (female symbol) x standard crosses. surprisingly, these frequencies seem to be unrelated to the primary (postmeiotic) frequencies predicted by metaphase i configurations or to the proportion of the chromosome arm that is duplicate or deficient. deficiencies and duplications from differ ... | 1987 | 17246386 |
| centromere orientation of quadrivalents of heterozygous translocations and an autoploid of gossypium hirsutum l. | cytological observations of quadrivalents of heterozygous translocations in gossypium hirsutum l. demonstrate that, in addition to alternate-1 and alternate-2 orientations, a third alternate orientation (alternate-3), which occurs as a three-dimensional, v-type configuration, can be identified.-two additional types of disjunctions, the centromere orientations of which are rotational modifications of either adjacent or alternate configurations, were also observed in quadrivalents of a translocati ... | 1983 | 17246172 |
| identification and characterization of the novel gene ghdbp2 encoding a dre-binding protein from cotton (gossypium hirsutum). | a cdna encoding one novel dre-binding protein, ghdbp2, was isolated from cotton seedlings. it is classified into the a-6 group of dreb subfamily based on multiple sequence alignment and phylogenetic characterization. using semi-quantitative rt-pcr, we found that the ghdbp2 transcripts were greatly induced by drought, nacl, low temperature and aba treatments in cotton cotyledons. the dna-binding properties of ghdbp2 were analyzed by electrophoretic mobility shift assay (emsa), showing that ghdbp2 ... | 2008 | 17224201 |
| molecular cloning and expression analysis of a ranbp2 zinc finger protein gene in upland cotton (gossypium hirsutum l.). | gossypol is an important resistant substance of gossypium, and its storage organ is pigment gland. although, the relationship between gossypol and pigment gland has been studied for a long time, the development mechanism of pigment gland has not been revealed up to now in molecular perspective. on the basis of differentially expressed cdnas fragments at the stage of the cotton gland development using suppression subtractive hybridization (ssh), the complete cdna sequence of a novel ranbp2 zinc f ... | 2007 | 17223018 |
| a rapid single-step multiplex method for discriminating between trichogramma (hymenoptera: trichogrammatidae) species in australia. | inaccurate species identification confounds insect ecological studies. examining aspects of trichogramma ecology pertinent to the novel insect resistance management strategy for future transgenic cotton, gossypium hirsutum l., production in the ord river irrigation area (oria) of western australia required accurate differentiation between morphologically similar trichogramma species. established molecular diagnostic methods for trichogramma identification use species-specific sequence difference ... | 2006 | 17195685 |
| high-level resistance to bacillus thuringiensis toxin crylac and cadherin genotype in pink bollworm. | resistance to transgenic cotton, gossypium hirsutum l., producing bacillus thuringiensis (bt) toxin cry1ac is linked with three recessive alleles of a cadherin gene in laboratory-selected strains of pink bollworm, pectinophora gossypiella (saunders), a major cotton pest. here, we analyzed a strain (mov97-r) with a high frequency of cadherin resistance alleles, a high frequency of resistance to 10 microg of cry1ac per milliliter of diet, and an intermediate frequency of resistance to 1000 microg ... | 2006 | 17195682 |
| modeling the impact of alternative hosts on helicoverpa zea adaptation to bollgard cotton. | for highly polyphagous cotton, gossypium hirsutum l., pests such as helicoverpa zea (boddie), a substantial portion of the larval population develops on noncotton alternative hosts. these noncotton hosts potentially provide a natural refuge for h. zea, thereby slowing the evolution of resistance to the bacillus thuringiensis berliner (bt)-derived cry1ac protein present in bollgard cotton. here, we demonstrate how the measured contribution of such alternative hosts can be included in estimating t ... | 2006 | 17195681 |
| cadherin-based resistance to bacillus thuringiensis cotton in hybrid strains of pink bollworm: fitness costs and incomplete resistance. | recessive resistance to bacillus thuringiensis (bt) cotton, gossypium hirsutum l., in laboratory-selected strains of pink bollworm, pectinophora gossypiella (saunders), is associated with three resistance alleles (r1, r2, and r3) of a cadherin gene. previous experiments based on measurement of fitness components in bt-resistant and bt-susceptible strains revealed that fitness costs and incomplete resistance are associated with resistance. here, we used two hybrid strains of pink bollworm, each c ... | 2006 | 17195656 |
| role of pantoea agglomerans in opportunistic bacterial seed and boll rot of cotton (gossypium hirsutum) grown in the field. | to investigate the aetiology of seed and boll rot of cotton grown in south carolina (sc). | 2007 | 17184328 |
| genetics of resistance to cotton leaf curl disease in gossypium hirsutum l. under field conditions. | one hundred and forty two cotton germplasm lines were screened for cotton leaf curl virus symptoms in field evaluations during 2003, 2004, and 2005. fifty cross combinations involving 30 of these lines classified resistant or susceptible were used for inheritance study of the disease. all the f(1) plants of crosses involving resistant x resistant, resistant x susceptible, and susceptible x resistant parents were resistant, indicating dominant expression of the disease resistance and there were n ... | 2007 | 17159229 |
| disease resistance conferred by the expression of a gene encoding a synthetic peptide in transgenic cotton (gossypium hirsutum l.) plants. | fertile, transgenic cotton plants expressing the synthetic antimicrobial peptide, d4e1, were produced through agrobacterium-mediated transformation. pcr products and southern blots confirmed integration of the d4e1 gene, while rt-pcr of cotton rna confirmed the presence of d4e1 transcripts. in vitro assays with crude leaf protein extracts from t0 and t1 plants confirmed that d4e1 was expressed at sufficient levels to inhibit the growth of fusarium verticillioides and verticillium dahliae compare ... | 2005 | 17147626 |
| xenia effect on seed and embryo size in cotton (gossypium hirsutum l.). | the term xenia was coined to describe the effect of foreign pollen on the development and characters of the seed. to study its importance and consequences for various seed traits in cotton (gossypium hirsutum l.), the effect of pollen genotype on seed and embryo weight was studied with seeds from 15 f1 hybrids. cross-fertilization changed seed weight by up to 7.0% in relation to self-fertilization. xenia effect significantly increased embryo weight of cross-fertilized seeds, by up to 14.4% in co ... | 2006 | 17132897 |
| enhanced degradation of atrazine under field conditions correlates with a loss of weed control in the glasshouse. | enhanced degradation of atrazine has been reported in the literature, indicating the potential for reduced residual weed control with this herbicide. experiments were conducted to determine the field dissipation of atrazine in three cropping systems: continuous zea mays l. (cc) receiving atrazine applications each year, gossypium hirsutum l.-z. mays rotation (ccr) receiving applications of atrazine once every 2 years and a no atrazine history soil (nah). subsequent laboratory and greenhouse expe ... | 2007 | 17115404 |
| molecular characterization and expression analysis of nine cotton ghef1a genes encoding translation elongation factor 1a. | the translation elongation factor 1a, eef1a, plays an important role in protein synthesis, catalyzing the binding of aminoacyl-trna to the a-site of the ribosome by a gtp-dependent mechanism. to investigate the role of eef1a for protein synthesis in cotton fiber development, nine different cdna clones encoding eukaryotic translation elongation factor 1a were isolated from cotton (gossypium hirsutum) fiber cdna libraries. the isolated genes (cdnas) were designated cotton elongation factor 1a gene ... | 2007 | 17107762 |
| [structural-functional organization of chloroplasts in leaves of xantha-702 mutant of gossypium hirsutum l]. | for cotton mutant xantha (gossypium hirsutum l.), it has been established that synthesis of 5-aminolevulinic acid was blocked in the light. in the light this mutant accumulates chlorophyll by 30 times lower as compared to the parent type. in mutant xantha, a very few pigment-protein complexes of ps-i and ps-ii are formed in chloroplasts, and formation of membrane system in these is blocked at the early stages, in most cases, at the stage of bubbles and single short thylakoids. functional activit ... | 2006 | 17087145 |
| [isolation by suppression-subtractive hybridization of genes preferentially expressed during early and late fiber development stages in cotton]. | as a main natural fiber source, cotton plays an important role in human life. to identify genes preferentially expressed during early and late cotton fiber development, we constructed two fiber subtracted libraries on the basis of pcr-selected subtraction using a pool of nonfiber tissues as the same driver and 10 days postanthesis (dpa) and 20 dpa fiber cells as testers, respectively. through differential screening, 292 clones in both libraries were identified as being preferentially expressed d ... | 2006 | 17086983 |
| [cloning of ghaqp1 gene and its specific expression during ovule development in cotton]. | plant aquaporins, belonging to the mip superfamily, are a series of transmembrane proteins that facilitate water transport through cell membranes. in this study, a cdna clone encoding the pip1-like protein was isolated from cotton (gossypium hirsutum) cdna libraries, and designated as ghaqp1 (fig.1). we also isolated the ghaqp1 gene from cotton genome by pcr. the gene is 2,096 bp in length, including an open reading frame (orf) and 5'-/3'-untranslated regions (utr). it contains two introns in it ... | 2006 | 17075177 |
| evaluation of source leaf responses to water-deficit stresses in cotton using a novel stress bioassay. | water-deficit stresses preferentially reduce shoot growth, thereby disrupting the flow of carbohydrates from source leaves to the developing sinks. here, we use a novel stress bioassay to dissect responses of field and greenhouse-grown cotton (gossypium hirsutum) source leaves to water-deficit stresses. fifth main stem leaf samples were harvested at sunrise and subjected to a prolonged elevated respiratory demand in the dark. sucrose levels are lower in nonstressed cotton at sunrise compared to ... | 2007 | 17071650 |
| selecting for efficacy of bollgard cotton cultivars against various lepidoptera using forward breeding techniques. | studies during the past 5 yr have shown that the overall level of protein (cry1ac) produced from the cry1ac transgene (monsanto co., st. louis, mo) differ among commercial bollgard cotton, gossypium hirsutum l., cultivars. these differences between cultivars are under genetic control and have been correlated with efficacy of certain lepidopteran pests. previous studies have shown that the parental background (i.e., non-cry1ac conventional cultivar) has a significant influence on the amount of cr ... | 2006 | 17066820 |
| effect of cotton cultivar on performance of aphis gossypii (homoptera: aphididae) in iran. | cotton aphids, aphis gossypii glover (homoptera: aphididae), obtained from cotton, gossypium hirsutum l., fields in the gorgan region of northern iran, were colonized on 'varamin' cotton plants in a growth chamber. the development, survivorship, and life table parameters of the cotton aphid were evaluated at 27.5 +/- 1 degrees c, 65 +/- 10% rh, and aphotoperiod of 14:10 (l:d) h of artificial light on five commonly growing cotton cultivars: varamin, 'sealand' (relatively resistant cultivar), 'bak ... | 2006 | 17066818 |
| genetic variation for resistance to bacillus thuringiensis toxins in helicoverpa zea (lepidoptera: noctuidae) in eastern north carolina. | to evaluate resistance to bacillus thuringiensis berliner (bt) toxins, adult female bollworms, helicoverpa zea (boddie) (lepidoptera: noctuidae), were collected from four light trap locations in two eastern north carolina counties from august to october during 2001 and 2002. females were allowed to oviposit, and upon hatching, 24 neonates from each female (f1 lines) were screened for survival and growth rate on each of three diets: non-bt diet, diet containing 5.0 microg/ml cry1ac toxin, or diet ... | 2006 | 17066814 |
| dna screening reveals pink bollworm resistance to bt cotton remains rare after a decade of exposure. | transgenic crops producing toxins from the bacterium bacillus thuringiensis (bt) kill insect pests and can reduce reliance on insecticide sprays. although bt cotton (gossypium hirsutum l.) and bt corn (zea mays l.) covered 26 million ha worldwide in 2005, their success could be cut short by evolution of pest resistance. monitoring the early phases of pest resistance to bt crops is crucial, but it has been extremely difficult because bioassays usually cannot detect heterozygotes harboring one all ... | 2006 | 17066779 |
| designing and transgenic expression of melanin gene in tobacco trichome and cotton fiber. | in streptomyces antibioticus, there are two genes tyra and orf438 required for the melanin biogenesis. to investigate whether expression of these two genes in cotton can change cotton fiber colour, we modified the tyra and orf438 genes to make their codon usage closer to the codon preference of cotton fiber genes. the resulting versions of these two genes were referred to as dtyra and dorf438, respectively. vacuolar targeting signals were also added to their ends. under the cotton fiber specific ... | 2007 | 17006798 |
| cotton (gossypium hirsutum l.). | considering the economic importance of cotton in many developing and developed countries, there is an urgent need to accelerate the application of biotechnological tools to address the problems associated with the production of this crop and to improve the quality of fiber and seed. this requires a simple yet robust gene delivery/transformant recovery system. a protocol for the production of transgenic cotton plants was refined in our laboratory. it involves agrobacterium-mediated transformation ... | 2006 | 16988351 |
| infraspecific dna methylation polymorphism in cotton (gossypium hirsutum l.). | cytosine methylation is important in the epigenetic regulation of gene expression and development in plants and has been implicated in silencing duplicate genes after polyploid formation in several plant groups. relatively little information exists, however, on levels and patterns of methylation polymorphism (mp) at homologous loci within species. here we explored the levels and patterns of methylation-polymorphism diversity at ccgg sites within allotetraploid cotton, gossypium hirsutum, using a ... | 2006 | 16987937 |
| the american cotton rat: a novel model for pulmonary tuberculosis. | several animal models are used to study mycobacterium tuberculosis (mtb) infections, but none is a fully ideal model of human disease. the american cotton rat is an excellent model for the study of several human viral and bacterial respiratory infectious diseases, but until now has not been reported to be a model with mtb infection. preliminary experiments were designed in which two species of cotton rats (sigmodon hispidus and sigmodon fulviventer) received respiratory challenges with m. tuberc ... | 2007 | 16973421 |
| soil microbial activity is affected by roundup weathermax and pesticides applied to cotton (gossypium hirsutum). | adoption of glyphosate-based weed control systems has led to increased use of the herbicide with continued use of additional pesticides. combinations of pesticides may affect soil microbial activity differently than pesticides applied alone. research was conducted to evaluate the influence of glyphosate-based cotton pest management systems on soil microbial activity. soil was treated with commercial formulations of trifluralin, aldicarb, and mefenoxam + pentachloronitrobenzene (pcnb) with or wit ... | 2006 | 16968086 |
| qtl mapping for resistance to root-knot nematodes in the m-120 rnr upland cotton line (gossypium hirsutum l.) of the auburn 623 rnr source. | root-knot nematodes meloidogyne incognita (kofoid and white) can cause severe yield loss in cotton (gossypium hirsutum l.). the objectives of this study were to determine the inheritance and genomic location of genes conferring root-knot nematode resistance in m-120 rnr, a highly resistant g. hirsutum line with the auburn 623 rnr source of resistance. utilizing two interspecific f(2) populations developed from the same m-120 rnr by gossypium barbadense (cv. pima s-6) cross, genome-wide scanning ... | 2006 | 16960714 |
| short-range dispersal and overwintering habitats of boll weevils (coleoptera: curculionidae) during and after harvest in the subtropics. | field experiments in the subtropical lower rio grande valley of texas were conducted to determine the extent of adult boll weevil, anthonomus grandis grandis boheman (coleoptera: curculionidae), dispersal from cotton, gossypium hirsutum l., fields during harvest operations and the noncotton-growing ("overwinter") period between 1 september and 1 february. using unbaited large capacity boll weevil traps placed at intervals extending outward from commercial field edges, boll weevils did not move i ... | 2006 | 16937667 |
| cloning and functional analysis of the novel gene ghdbp3 encoding a dre-binding transcription factor from gossypium hirsutum. | a novel cdna encoding dre-binding transcription factor, designated ghdbp3, was cloned from gossypium hirsutum. this protein was classified into a-4 group of dreb subfamily based on multiple sequence alignment and phylogenetic characterization. semiquantitative rt-pcr showed that ghdbp3 was expressed in the leaves, cotyledons, roots and stems of 2-week-old cotton seedlings under non-stress conditions and was greatly induced in the cotton cotyledons by drought, nacl, low temperature and aba treatm ... | 2006 | 16935362 |
| [spectral characteristics and the structure of chloroplasts upon blocking the early stages of chlorophyll biosynthesis]. | the cotton mutant xantha (gossypium hirsutum l.) with the blocked synthesis of 5-aminolevulinic acid in the light has been shown to accumulate chlorophyll 30 times less than the parent type. in chloroplasts of the mutant xantha, the formation of the membrane system is blocked at the earliest stages, mainly at the stage of bubbles and single short thylakoids. only light-harvesting chlorophyll-a/b-protein complexes i and ii with chlorophyll fluorescence maxima at 728 and 681 nm, respectively, are ... | 2006 | 16909851 |
| the current status and environmental impacts of glyphosate-resistant crops: a review. | glyphosate [n-(phosphonomethyl) glycine]-resistant crops (grcs), canola (brassica napus l.), cotton (gossypium hirsutum l.), maize (zea mays l.), and soybean [glycine max (l.) merr.] have been commercialized and grown extensively in the western hemisphere and, to a lesser extent, elsewhere. glyphosate-resistant cotton and soybean have become dominant in those countries where their planting is permitted. effects of glyphosate on contamination of soil, water, and air are minimal, compared to some ... | 2006 | 16899736 |
| how do leaf hydraulics limit stomatal conductance at high water vapour pressure deficits? | a reduction in leaf stomatal conductance (g) with increasing leaf-to-air difference in water vapour pressure (d) is nearly ubiquitous. ecological comparisons of sensitivity have led to the hypothesis that the reduction in g with increasing d serves to maintain leaf water potentials above those that would cause loss of hydraulic conductance. a reduction in leaf water potential is commonly hypothesized to cause stomatal closure at high d. the importance of these particular hydraulic factors was te ... | 2006 | 16898024 |
| effect of monosodium methanarsonate application on cuticle wax content of cocklebur and cotton plants. | leaf cuticle waxes were extracted from monosodium methanearsonate (msma)-resistant (r) and -susceptible (s) common cocklebur (xanthium strumarium l.) and cotton (gossypium hirsutum l.) plants at 0, 3, 5, and 7 days after treatment (dat) following 1x and 2x msma applications. wax constituents were analyzed by gas chromatography (gc) with flame ionization detection and compared to alkane and alcohol standards of carbon lengths varying from c21 to c30. differences in waxes were calculated and repor ... | 2006 | 16893783 |
| accumulation of genome-specific transcripts, transcription factors and phytohormonal regulators during early stages of fiber cell development in allotetraploid cotton. | gene expression during the early stages of fiber cell development and in allopolyploid crops is poorly understood. here we report computational and expression analyses of 32 789 high-quality ests derived from gossypium hirsutum l. texas marker-1 (tm-1) immature ovules (gh_tmo). the ests were assembled into 8540 unique sequences including 4036 tentative consensus sequences (tcs) and 4504 singletons, representing approximately 15% of the unique sequences in the cotton est collection. compared with ... | 2006 | 16889650 |
| molecular cloning of a peroxidase gene from poplar and its expression in response to stress. | to elucidate the precise functions of peroxidase in poplar (populus alba x p. tremula var. glandulosa), we cloned a peroxidase gene (popod1) from poplar suspension culture cells and examined its expression pattern in response to various stresses. popod1 showed the highest homology with a bacterial-induced peroxidase gene from cotton (gossypium hirsutum l.). the popod1 gene encodes a putative 316 amino acid protein with an n-terminal signal peptide of 23 residues. the dna blot analysis indicated ... | 2006 | 16877325 |
| the cotton fiber zinc-binding domain of cellulose synthase a1 from gossypium hirsutum displays rapid turnover in vitro and in vivo. | little is known about the assembly and turnover of cellulose synthase complexes commonly called rosettes. recent work indicates that rosette assembly could involve the dimerization of cesa (cellulose synthase catalytic subunit) proteins regulated by the redox state of the cesa zinc-binding domain (znbd). several studies in the 1980s led to the suggestion that synthase complexes may have very short half-lives in vivo, but no recent work has directly addressed this issue. in the present work, we s ... | 2006 | 16873546 |
| foliar washoff potential and simulated surface runoff losses of trifloxysulfuron in cotton. | the surface runoff potential of trifloxysulfuron {n-[(4,6-dimethoxy-2-pyrimidinyl)carbamoyl]-3-(2,2,2-trifluoroethoy)-pyridin-2-sulfonamide sodium salt} in cotton (gossypium hirsutum l.) production systems has not been evaluated. the objectives of this study were to (i) determine sorption/desorption coefficients for trifloxysulfuron; (ii) quantify foliar washoff of trifloxysulfuron when applied to cotton at the five-leaf stage; and (iii) determine the surface runoff potential of trifloxysulfuron ... | 2006 | 16848537 |
| carbon supply and storage in tilled and nontilled soils as influenced by cover crops and nitrogen fertilization. | soil carbon (c) sequestration in tilled and nontilled areas can be influenced by crop management practices due to differences in plant c inputs and their rate of mineralization. we examined the influence of four cover crops {legume [hairy vetch (vicia villosa roth)], nonlegume [rye (secale cereale l.)], biculture of legume and nonlegume (vetch and rye), and no cover crops (or winter weeds)} and three nitrogen (n) fertilization rates (0, 60 to 65, and 120 to 130 kg n ha(-1)) on c inputs from cove ... | 2006 | 16825471 |
| soil organic carbon sequestration in cotton production systems of the southeastern united states: a review. | past agricultural management practices have contributed to the loss of soil organic carbon (soc) and emission of greenhouse gases (e.g., carbon dioxide and nitrous oxide). fortunately, however, conservation-oriented agricultural management systems can be, and have been, developed to sequester soc, improve soil quality, and increase crop productivity. our objectives were to (i) review literature related to soc sequestration in cotton (gossypium hirsutum l.) production systems, (ii) recommend best ... | 2006 | 16825457 |
| effect of resistance to bacillus thuringiensis cotton on pink bollworm (lepidoptera: gelechiidae) response to sex pheromone. | fitness costs associated with resistance to transgenic crops producing toxins from bacillus thuringiensis (bt) could reduce male response to pheromone traps. such costs would cause underestimation of resistance frequency if monitoring was based on analysis of males caught in pheromone traps. to develop a dna-based resistance monitoring program for pink bollworm, pectinophora gossypiella (saunders) (lepidoptera: gelechiidae), we compared the response to pheromone traps of males with and without c ... | 2006 | 16813335 |
| captures of boll weevils (coleoptera: curculionidae) in traps associated with different habitats. | programs to eradicate the boll weevil, anthonomus grandis grandis boheman, from cotton, gossypium hirsutum l., in the united states rely heavily on pheromone traps for monitoring weevil populations in both active and posteradication maintenance programs. modifications to trapping protocols that increase trap effectiveness should contribute to this eradication effort. between october 1996 and may 1997 and between september 1997 and april 1998, we compared trap effectiveness, indicated by the numb ... | 2006 | 16813308 |
| the absolute configuration of (-)-3-hydroxy-alpha-calacorene. | 3-hydroxy-alpha-calacorene was identified in extracts from cold-shocked seedlings of cotton (gossypium hirsutum l.) and kenaf (hibiscus cannabinus l.), both of which are members of the malvaceae family. (-)-3-hydroxy-alpha-calacorene was isolated from heterotheca inuloides cass. (asteraceae). hplc on a chiral stationary phase column showed that the 3-hydroxy-alpha- calacorene from cotton and kenaf had the same relative configuration, while that from h. inuloides was of the opposite configuration ... | 2006 | 16806327 |
| agrobacterium-mediated transformation of cotton (gossypium hirsutum l. cv. zhongmian 35) using glyphosate as a selectable marker. | the most economically significant chinese cotton cultivar (gossypium hirsutum l. cv. zhongmian 35) was transformed via agrobacterium tumefaciens-mediated dna transfer. the aroa-m1 gene that confers resistance to the glyphosate was fused with a chloroplast-transit peptide of arabidopsis thaliana 5-enolpyruvyl-3-phosphoshikimate synthase (asp) and expressed in cotton plants under the control of a camv35s promoter. transgenic plants were directly selected on medium containing glyphosate. thirty-fou ... | 2006 | 16799756 |
| influence of cytokinins, auxins and polyamines on in vitro mass multiplication of cotton (gossypium hirsutum l. cv. svpr2). | in the present investigation, the influence of different forms of cytokinins, auxins and polyamines were tested for mass multiplication and regeneration of cotton. initially, for the identification of effective concentration for multiple shoot induction, various concentrations of bap, kin and 2ip along with iaa and naa were tested. among tested concentrations, media fortified with ms salts; b5 vitamins; 30 g/l, glucose; 2.0 mg/l, 2ip; 2.0 mg/l, iaa and 0.7 % agar showed best response for multipl ... | 2006 | 16784123 |
| glyphosate-induced anther indehiscence in cotton is partially temperature dependent and involves cytoskeleton and secondary wall modifications and auxin accumulation. | yield reduction caused by late application of glyphosate to glyphosate-resistant cotton (gossypium hirsutum; grc) expressing cp4 5-enol-pyruvylshikmate-3-p synthase under the cauliflower mosaic virus-35s promoter has been attributed to male sterility. this study was aimed to elucidate the factors and mechanisms involved in this phenomenon. western and tissue-print blots demonstrated a reduced expression of the transgene in anthers of grc compared to ovules of the same plants. glyphosate applicat ... | 2006 | 16766672 |
| the cloning and sequencing of a cdna encoding a wd repeat protein in cotton (gossypium hirsutum l.). | in this research, one 1156 bp cdna containing full open reading frame and encoding a novel 24-kda protein with four tandem wd repeat motifs was cloned from cotton, therefore was named ghwdr and the genbank accession number is ay870657. by search of ghwdr cdna and amino acid sequences in the database, we found that ghwdr and osjnba0003g23.2 from oryza sativa show 90% sequence identity and 84% identity to wd-repeat protein from arabidopsis thaliana, and also has high sequence identity to other wd ... | 2006 | 16753817 |
| effect of racemic and (+)- and (-)-gossypol on the survival and development of helicoverpa zea larvae. | gossypol is a sesquiterpene that occurs naturally in seed and other parts of the cotton plant. because of restricted rotation around the binaphthyl bond, it occurs naturally as enantiomeric mixtures with (+)-gossypol to (-)-gossypol ratios that vary between 97:3 and 31:69. commercial cotton varieties (gossypium hirsutum) normally exhibit an approximate 3:2 ratio. (+)-gossypol is significantly less toxic than (-)-gossypol to nonruminant animals; thus, cottonseed containing high levels of (+)-goss ... | 2006 | 16739016 |
| an experiment using neutron activation analysis and a rare earth element to mark cotton plants and two insects that feed on them. | studies on insect dispersal and other behaviors can benefit from using markers that will not alter flight and fitness. rare earth elements, such as samarium (sm), have been used as ingested markers of some insects and detected using neutron activation analysis (naa). in this study, samarium nitrate hexahydrate was mixed into artificial diet for boll weevils, anthonomus grandis grandis boheman (coleoptera: curculionidae), at different dosages and in water used to irrigate cotton, gossypium hirsut ... | 2006 | 16713273 |
| isolation of the promoter of a cotton beta-galactosidase gene (ghgal1) and its expression in transgenic tobacco plants. | beta-galactosidases (ec 3.2.1.23) constitute a widespread family of glycosyl hydrolases in plants and are thought to be involved in metabolism of cell wall polysaccharides. a cdna of the cotton (gossypium hirsutum) beta-galactosidase gene, designated ghgal1, has previously been identified and its transcripts are highly abundant at the elongation stage of the cotton fiber. to examine the temporal and spatial control of ghgal1 expression, a transcriptional fusion of the ghgal1 promoter region (177 ... | 2006 | 16704113 |
| analysis of ests from multiple gossypium hirsutum tissues and identification of ssrs. | in an effort to expand the gossypium hirsutum l. (cotton) expressed sequence tag (est) database, ests representing a variety of tissues and treatments were sequenced. assembly of these sequences with ests already in the est database (dbest, genbank) identified 9675 cotton sequences not present in genbank. statistical analysis of a subset of these ests identified genes likely differentially expressed in stems, cotyledons, and drought-stressed tissues. annotation of the differentially expressed cd ... | 2006 | 16699550 |
| sampling methods, dispersion patterns, and fixed precision sequential sampling plans for western flower thrips (thysanoptera: thripidae) and cotton fleahoppers (hemiptera: miridae) in cotton. | a 2-yr field study was conducted to examine the effectiveness of two sampling methods (visual and plant washing techniques) for western flower thrips, frankliniella occidentalis (pergande), and five sampling methods (visual, beat bucket, drop cloth, sweep net, and vacuum) for cotton fleahopper, pseudatomoscelis seriatus (reuter), in texas cotton, gossypium hirsutum (l.), and to develop sequential sampling plans for each pest. the plant washing technique gave similar results to the visual method ... | 2006 | 16686161 |
| molecular variability of spodoptera frugiperda (lepidoptera: noctuidae) populations associated to maize and cotton crops in brazil. | the molecular variability among 10 populations of spodoptera frugiperda (j.e. smith), collected from maize, zea mays l., or cotton gossypium hirsutum l. crops located at distinctive geographical regions in brazil, was assessed through random amplification of polymorphic dna (rapd)-polymerase chain reaction (pcr). in total, 208 rapd markers were evaluated, and 98% of them were polymorphic. the mean genetic similarity was 0.6621 and 0.2499 by the simple matching and jaccard matrices, respectively. ... | 2006 | 16686155 |
| regulation of photosynthesis by end-product accumulation in leaves of plants storing starch, sucrose, and hexose sugars. | in the present study, leaves of different plant species were girdled by the hot wax collar method to prevent export of assimilates. photosynthetic activity of girdled and control leaves was evaluated 3 to 7 days later by two methods: (a) carbon exchange rate (cer) of attached leaves was determined under ambient co(2) concentrations using a closed gas system, and (b) maximum photosynthetic capacity (a(max)) was determined under 3% co(2) with a leaf disc o(2) electrode. starch, hexoses, and sucros ... | 1992 | 16669056 |
| 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 |
| sequence of the gossypium hirsutum d-genome alloallele of legumin a and its mrna. | 1991 | 16668521 | |
| evidence for light-dependent recycling of respired carbon dioxide by the cotton fruit. | conservation of respired co(2) by an efficient recycling mechanism in fruit could provide a significant source of c for yield productivity. however, the extent to which such a mechanism operates in cotton (gossypium hirsutum l.) is unknown. therefore, a combination of co(2) exchange, stable c isotope, and chlorophyll (chl) fluorescence techniques were used to examine the recycling of respired co(2) in cotton fruit. respiratory co(2) losses of illuminated fruit were reduced 15 to 20% compared wit ... | 1991 | 16668437 |
| acclimation of co(2) assimilation in cotton leaves to water stress and salinity. | cotton (gossypium hirsutum l. cv acala sj2) plants were exposed to three levels of osmotic or matric potentials. the first was obtained by salt and the latter by withholding irrigation water. plants were acclimated to the two stress types by reducing the rate of stress development by a factor of 4 to 7. co(2) assimilation was then determined on acclimated and nonacclimated plants. the decrease of co(2) assimilation in salinity-exposed plants was significantly less in acclimated as compared with ... | 1991 | 16668429 |
| root restriction as a factor in photosynthetic acclimation of cotton seedlings grown in elevated carbon dioxide. | interactive effects of root restriction and atmospheric co(2) enrichment on plant growth, photosynthetic capacity, and carbohydrate partitioning were studied in cotton seedlings (gossypium hirsutum l.) grown for 28 days in three atmospheric co(2) partial pressures (270, 350, and 650 microbars) and two pot sizes (0.38 and 1.75 liters). some plants were transplanted from small pots into large pots after 20 days. reduction of root biomass resulting from growth in small pots was accompanied by decre ... | 1991 | 16668232 |
| acetolactate synthase inhibiting herbicides bind to the regulatory site. | acetolactate synthase from spontaneous mutants of tobacco (nicotiana tabacum; ks-43 and sk-53) and cotton (gossypium hirsutum; ps-3, psh-91, and do-2) selected in tissue culture for resistance to a triazolopyrimidine sulfonanilide showed varying degrees of insensitivity to feedback inhibitor(s) valine and/or leucine. a similar feature was evident in the enzyme isolated from chlorsulfuron-resistant weed biotypes, kochia scoparia and stellaria media. dual inhibition analyses of triazolopyrimidine ... | 1991 | 16668171 |
| effects of salinity on stomatal conductance, photosynthetic capacity, and carbon isotope discrimination of salt-tolerant (gossypium hirsutum l.) and salt-sensitive (phaseolus vulgaris l.) c(3) non-halophytes. | the effects of salinity on growth, stomatal conductance, photosynthetic capacity, and carbon isotope discrimination (delta) of gossypium hirsutum l. and phaseolus vulgaris l. were evaluated. plants were grown at different nacl concentrations from 10 days old until mature reproductive structures were formed. plant growth and leaf area development were strongly reduced by salinity, in both cotton and bean. stomatal conductance also was reduced by salinity. the delta always declined with increasing ... | 1991 | 16668029 |
| direct photolabeling with [p]udp-glucose for identification of a subunit of cotton fiber callose synthase. | we have identified a 52 kilodalton polypeptide as being a likely candidate for the catalytic subunit of the udp-glucose: (1-->3)-beta-glucan (callose) synthase of developing fibers of gossypium hirsutum (cotton). such a polypeptide migrates coincident with callose synthase during glycerol gradient centrifugation in the presence of edta, and can be directly photolabeled with the radioactive substrate, alpha-[(32)p]udp-glucose. interaction with the labeled probe requires ca(2+), a specific activat ... | 1991 | 16668019 |
| cultured ovules as models for cotton fiber development under low temperatures. | cotton fibers (gossypium hirsutum l.) developing in vitro responded to cyclic temperature change similarly to those of field-grown plants under diumal temperature fluctuations. absolute temperatures and rates of temperature change were similar under both conditions. in vitro fibers exhibited a "growth ring" for each time the temperature cycled to 22 or 15 degrees c. rings were rarely detected when the low point was 28 degrees c. the rings seemed to correspond to alternating regions of high and l ... | 1991 | 16667986 |
| intracellular localization of phosphatidylcholine and phosphatidylethanolamine synthesis in cotyledons of cotton seedlings. | subfractionation of clarified cotyledon homogenates of cotton (gossypium hirsutum l.) seedlings on sucrose gradients revealed a single coincident peak of cholinephosphotransferase (ec 2.7.8.2) (cpt) and ethanolaminephosphotransferase (ec 2.7.8.1) (ept) activities, which equilibrated with the main peak of antimycin a-insensitive nadh:cytochrome c reductase (ccr) activity. the small percentage of cpt and ept activities (less than 5% of the total) in glyoxysome-enriched pellets equilibrated with cy ... | 1991 | 16667983 |
| ethylene-induced leaf abscission in cotton seedlings : the physiological bases for age-dependent differences in sensitivity. | the speed of ethylene-induced leaf abscission in cotton (gossypium hirsutum l. cv lg-102) seedlings is dependent on leaf position (i.e. physiological age). fumigation of intact seedlings for 18 hours with 10 microliters per liter of ethylene resulted in 40% abscission of the still-expanding third true (3 degrees ) leaves but had no effect on the fully expanded first true (1 degrees ) leaves. after 42 hours of fumigation with 50 microliters per liter of ethylene, total abscission of the 3 degrees ... | 1991 | 16667967 |
| induction of leaf abscission in cotton is a common effect of urea- and adenine-type cytokinins. | cytokinins of the urea and adenine type induced leaf abscission in young cotton (gossypium hirsutum) plants in the following order of activity: n-phenyl-n'-1,2,3-thiadiazol-5-ylurea (thidiazuron) > n-phenyl-n'-(2-chloro-4-pyridyl)urea > isopentenyladenine >/= 6-benzyladenine > zeatin = dihydrozeatin > kinetin. it is suggested that ethylene production is implicated in this response because it was stimulated by the compounds in cotton leaf discs with nearly the same effectiveness. moreover, simila ... | 1991 | 16667957 |
| carbon partitioning and export from mature cotton leaves. | the partitioning of carbon in intact, mature cotton (gossypium hirsutum l.) leaves was examined by steady-state (14)co(2) labeling. plants were exposed to dark periods of varying lengths, followed by similar illuminated labeling periods. these treatments produced leaves with a range of starch and soluble sugar contents, carbon exchange, and carbon export rates. export during the illuminated periods was neither highly correlated with photosynthesis nor was export during the illuminated periods si ... | 1991 | 16667956 |
| purification and characterization of isoperoxidases elicited by aspergillus flavus in cotton ovule cultures. | two anionic isoperoxidases were isolated from media of aspergillus flavus-inoculated cotton (gossypium hirsutum l.) ovule cultures and purified about 150-fold to apparent homogeneity by treatment with cell debris remover and ion exchange chromatography on accell qma medium. these isoperoxidases were present in noninoculated cotton ovule cultures at low levels. the major activity peak (b) represented 90% of the recovered peroxidase activity and was electrophoretically homogeneous. the minor activ ... | 1991 | 16667941 |
| na/h and k/h antiport in root membrane vesicles isolated from the halophyte atriplex and the glycophyte cotton. | proton fluxes have been followed into and out of membrane vesicles isolated from the roots of the halophyte atriplex nummularia and the glycophyte gossypium hirsutum, with the aid of the deltaph probe [(14)c]methylamine. evidence is presented for the operation of na(+)/h(+) and k(+)/h(+) antiporters in the membranes of both plants. cation supply after a ph gradient has been set up across the vesicle membrane (either as a result of providing atp to the h(+)-atpase or by imposing an artificial ph ... | 1990 | 16667918 |
| photosynthetic characterization of photoautotrophic cells cultured in a minimal medium. | photosynthetic properties of photoautotrophic suspensions cultured in a minimal growth medium have been evaluated to determine whether changes have occurred in ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) activity, phosphoenol-pyruvate (pep) carboxylase activity, chlorophyll content, or culture growth. five photoautotrophic lines amaranthus powellii, datura innoxia, glycine max, gossypium hirsutum, and a nicotiana tabacum-nicotiana glutinosa fusion hybrid were grown in a medium with ... | 1990 | 16667897 |
| does water deficit stress promote ethylene synthesis by intact plants? | the effect of plant water deficit on ethylene production by intact plants was tested in three species, beans (phaseolus vulgaris l.), cotton (gossypium hirsutum l.) and miniature rose (rosa hybrida l., cv bluesette). compressed air was passed through glass, plant-containing cuvettes, ethylene collected on chilled columns, and subsequently assayed by gas chromatography. the usual result was that low water potential did not promote ethylene production. when plants were subjected to cessation of ir ... | 1990 | 16667895 |
| site of clomazone action in tolerant-soybean and susceptible-cotton photomixotrophic cell suspension cultures. | studies were conducted to determine the herbicidal site of clomazone action in tolerant-soybean (glycine max [l.] merr. cv corsoy) (sb-m) and susceptible-cotton (gossypium hirsutum [l.] cv stoneville 825) (cot-m) photomixotrophic cell suspension cultures. although a 10 micromolar clomazone treatment did not significantly reduce the terpene or mixed terpenoid content (microgram per gram fresh weight) of the sb-m cell line, there was over a 70% reduction in the chlorophyll (chl), carotenoid (car), ... | 1990 | 16667768 |
| photosynthetic and respiratory activity of fruiting forms within the cotton canopy. | the supply of photosynthates by leaves for reproductive development in cotton (gossypium hirsutum l.) has been extensively studied. however, the contribution of assimilates derived from the fruiting forms themselves is inconclusive. field experiments were conducted to document the photosynthetic and respiratory activity of cotton leaves, bracts, and capsule walls from anthesis to fruit maturity. bracts achieved peak photosynthetic rates of 2.1 micromoles per square meter per second compared with ... | 1990 | 16667734 |
| properties of mutant acetolactate synthases resistant to triazolopyrimidine sulfonanilide. | triazolopyrimidine sulfanilides are a class of highly active herbicides whose primary target is acetolactate synthase. spontaneous mutants of tobacco (nicotiana tabacum) (ks-43) and cotton (gossypium hirsutum) (ps-3 and do-2) resistant to triazolopyrimidine sulfonanilide were selected in tissue culture. acetolactate synthase partially purified from the three mutants were 80- to 1000-fold less sensitive to inhibition by the compound compared with the corresponding wild-type enzyme. the mutants al ... | 1990 | 16667692 |
| inhibition of cottonseed choline- and ethanolaminephosphotransferases by calcium during postgerminative growth. | activities of choline- and ethanolaminephosphotransferase (cpt and ept) were reproducibly high in microsomes from imbibed seeds of cotton (gossypium hirsutum, l.). initial studies showed that both activities dramatically declined during postgerminative growth when demand for phosphatidylcholine (pc) and phosphatidylethanolamine (pe) synthesis was high. addition of cacl(2) (0.1 millimolar) or aliquots of supernatant fractions (150,000g, 60 minutes) from cotyledons of 48-hour-old seedlings to imbi ... | 1990 | 16667651 |
| influence of water deficits on the abscisic acid and indole-3-acetic acid contents of cotton flower buds and flowers. | a field experiment was conducted during the summer of 1988 to test the hypothesis that water deficit affects the abscisic acid (aba) and indole acetic acid (iaa) concentrations in cotton (gossypium hirsutum l.) flower buds in ways that predispose young fruits (bolls) that subsequently develop from them to increased abscission rates. water deficit had little effect on the aba content of flower buds but increased the aba content of flowers as much as 66%. water deficit decreased the concentrations ... | 1990 | 16667566 |
| variation among species in the temperature dependence of the reappearance of variable fluorescence following illumination. | the relationship between the thermal dependence of the reappearance of chlorophyll variable fluorescence following illumination and temperature dependence of the apparent michaelis constant (k(m)) of nadh hydroxypyruvate reductase for nadh was investigated in cool and warm season plant species. brancker sf-20 and sf-30 fluorometers were used to evaluate induced fluorescence transients from detached leaves of wheat (triticum aestivum l. cv tam-101), cotton (gossypium hirsutum l. cv paymaster 145) ... | 1990 | 16667518 |
| responses of transpiration and hydraulic conductance to root temperature in nitrogen- and phosphorus-deficient cotton seedlings. | suboptimal n or p availability and cool temperatures all decrease apparent hydraulic conductance (l) of cotton (gossypium hirsutum l.) roots. the interaction between nutrient status and root temperature was tested in seedlings grown in nutrient solutions. the depression of l (calculated as the ratio of transpiration rate to absolute value of leaf water potential [psi(w)]) by nutrient stress depended strongly on root temperature, and was minimized at high temperatures. in fully nourished plants, ... | 1990 | 16667360 |