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Leht 1 alates 82 tulemused
Retargeting a maize β-glucosidase to the vacuole--evidence from intact plants that zeatin-O-glucoside is stored in the vacuole.
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Cytokinin (CK) activity is regulated by the complex interplay of their metabolism, transport, stability and cellular/tissue localization. O-glucosides of zeatin-type CKs are postulated to be storage and/or transport forms. Active CK levels are determined in part by their differential distribution of
Phaseoloidin, a homogentisic acid glucoside from Nicotiana attenuata trichomes, contributes to the plant's resistance against lepidopteran herbivores.
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Plant trichomes are known for their capability to produce and store secondary metabolites that protect plants from biotic and abiotic stresses. (1)H NMR studies on intact individual trichomes located on the leaf surface of Nicotiana attenuata revealed the presence of two major secondary metabolites:
Enhancement of volatile aglycone recovery facilitated by acid hydrolysis of glucosides from Nicotiana flower species.
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Four different Nicotiana flowers (Nicotiana alata (alata), Nicotiana sylvestris (Sy), Nicotiana suaveolens (Su), and Nicotiana tabacum cv. Flue-Cured (FC)) from farms in Virginia and North Carolina were harvested and promptly quenched with liquid nitrogen and hand-ground prior to analysis. Each
Molecular cloning, characterization, and downregulation of an acyltransferase that catalyzes the malonylation of flavonoid and naphthol glucosides in tobacco cells.
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Tobacco cells (Nicotiana tabacum L. Bright Yellow T-13) exposed to harmful naphthols accumulate them as glucosylated and further modified compounds [Taguchi et al. (2003a) Plant Sci. 164, 231-240]. In this study, we identified the accumulated compounds to be 6'-O-malonylated glucosides of naphthols.
The bifurcation of the cyanogenic glucoside and glucosinolate biosynthetic pathways.
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The biosynthetic pathway for the cyanogenic glucoside dhurrin in sorghum has previously been shown to involve the sequential production of (E)- and (Z)-p-hydroxyphenylacetaldoxime. In this study we used microsomes prepared from wild-type and mutant sorghum or transiently transformed Nicotiana
Malonylation is a key reaction in the metabolism of xenobiotic phenolic glucosides in Arabidopsis and tobacco.
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Tobacco cells (Nicotiana tabacum L.) accumulate harmful naphthols in the form of malonylated glucosides (Taguchi et al., 2005). Here, we showed that the malonylation of glucosides is a system to metabolize xenobiotics and is common to higher plants. Moreover, some plantlets including Arabidopsis
A pair of sesquiterpene glucosides from the leaves of Nicotiana tabacum.
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A pair of sesquiterpene glucosides, 3-hydroxysolavetivone-beta-D-glucoside A (1) and 3-hydroxysolavetivone-beta-D-glucoside B (2), have been isolated from the leaves of Nicotiana tabacum. The former is a new compound, while the latter is a known one. Their structures were established by
A new sesquiterpene glucoside from Nicotiana rustica L.
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A new compound, rel-2R,5S,9S,10R,11R,12-trihydroxy-6(7)-spirovetiven-8-one-9- O-β-D-glucopyranoside (1), along with a known spirovetiven glucoside (2), was isolated from the leaves of Nicotiana rustica L. The structure of compound (1) was elucidated on the basis of spectroscopic data.
Biosynthesis of dehydrodiconiferyl alcohol glucosides: implications for the control of tobacco cell growth.
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The dehydrodiconiferyl alcohol glucosides A and B are factors isolated from transformed Vinca rosea tumor cells that can replace the cytokinin requirement for growth of tobacco (Nicotiana tabacum) pith and callus cells in culture. These factors, present in tobacco pith cells, have their
Synthetic Biology of Cannabinoids and Cannabinoid Glucosides in Nicotiana benthamiana and Saccharomyces cerevisiae
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Phytocannabinoids are a group of plant-derived metabolites that display a wide range of psychoactive as well as health-promoting effects. The production of pharmaceutically relevant cannabinoids relies on extraction and purification from cannabis (Cannabis sativa) plants yielding the major
Biosynthesis of the leucine derived α-, β- and γ-hydroxynitrile glucosides in barley (Hordeum vulgare L.).
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Barley (Hordeum vulgare L.) produces five leucine-derived hydroxynitrile glucosides (HNGs), of which only epiheterodendrin is a cyanogenic glucoside. The four non-cyanogenic HNGs are the β-HNG epidermin and the γ-HNGs osmaronin, dihydroosmaronin and sutherlandin. By analyzing 247 spring barley lines
Genetic engineering of plant secondary metabolism. Accumulation of 4-hydroxybenzoate glucosides as a result of the expression of the bacterial ubiC gene in tobacco.
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The ubiC gene of Escherichia coli encodes chorismate pyruvatelyase, an enzyme that converts chorismate into 4-hydroxybenzoate (4HB) and is not normally present in plants. The ubiC gene was expressed in Nicotiana tabacum L. plants under control of a constitutive plant promoter. The gene product was
Two new sesquiterpene glucosides from the leaves of Nicotiana tabacum.
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Two new sesquiterpene glycosides, 11R,12-dihydroxy-6(7)-spirovetiven-8-one-9-O-beta-D-glucopyranoside (1) and rishitin M1-13-O-beta-D-glucopyranoside (2), have been isolated from the leaves of Nicotiana tabacum. Their structures were established by spectroscopic methods including (1)H, (13)C, and 2D
Short communications. The incorporation of ( 14 C 4 )aspartic acid into nicotinic acid N-glucoside in Nicotiana tabacum.
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A new cyanogenic metabolite in Arabidopsis required for inducible pathogen defence.
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Thousands of putative biosynthetic genes in Arabidopsis thaliana have no known function, which suggests that there are numerous molecules contributing to plant fitness that have not yet been discovered. Prime among these uncharacterized genes are cytochromes P450 upregulated in response to
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