Showing papers in "Phytochemistry in 1982"

TL;DR: The cytokinin activity of Thidiazuron was similar to that of the highly active N -phenyl- N ′-4-pyridylurea derivatives and to the most active cytokinins of the adenine type.

TL;DR: In this paper, β-Rutinosides (6-O-α- l -rhamnopyranosyl-β- d -glucopyranoides) and 6-Oα-l -arabinofuranosylβ-d-glucopeysides of Geraniol, nerol and linalol have been isolated and characterized in Muscat of Alexandria grapes and wine.

TL;DR: The complete structural elucidation of the two caffeic acid sugar esters verbascoside and orobanchoside, has been realized by 1 H and 13 C NMR studies as discussed by the authors.

TL;DR: The kinetics of the inhibition of glutamine synthetase from Pisum sativum leaves by l -methionine sulphoximine and dl -phosphinothricin were determined and inhibition by both compounds was mixed-competitive.

TL;DR: The distinctive and unique features of gallic acid metabolism in plants are discussed and recent observations on new metabolites are presented and the potential application of these results to taxonomic questions is outlined.

TL;DR: In this article, the chemiluminescence of luminol (3-aminophthalhydrazide) with H 2 O 2 has been used to quantify endogenous amounts of H 2 o 2 in plant tissues.

TL;DR: In this paper, the absence of C 20 -hydrocarbon precursors of crocetin supports a degradation pathway for the biosynthesis of crocodetin in Crocus sativus.

TL;DR: A reinvestigation of the aerial parts of Tanacetum parthenium afforded in addition to known compounds three pinene derivatives, two spiroketal enol ether polyines, four germacranolides; and six guaianolides, two of them being endoperoxides, and two secoguaianolide.

TL;DR: The cardenolide content of the latex and leaves of seven Asclepias species and Calotropis procera was examined quantitatively by spectroassay a for the first time.

TL;DR: In rape seed, low temperatures and low light intensities increase the level of linoleic acid at the expense of oleic acid biosynthesis without change in plant growth.

TL;DR: The debarked roots of Tamarix nilotica contain the furanofuran lignan (±)-syringaresinol so far not reported from the Tamaricaceae, and the new natural product ellagic acid 3,3′-dimethyl ether 4- O -β- d -glucopyranoside as discussed by the authors.

TL;DR: The fresh leaves of P. Australis and P. australis detritus are characterized by a distinctive distribution of solvent-extractable long-chain monocarboxylic, α, ω-dicar boxylic and ω -hydroxy acids, which should enable these lipid components along with other distinctive components to be used as chemical markers of the seagrass P.Australis.

TL;DR: By irradiation with fluorescent light, medium-induced cell cultures of Catharanthus roseus accumulated anthocyanins and the indole alkaloid serpentine and the formation of both compounds was inhibited by phosphate and nitrogen-containing mineral salts and stimulated by high sucrose concentrations.

TL;DR: Chlorophyll is effectively bleached by H 2 O 2 in the presence of certain phenols and peroxidase (EC 1.7) extracted from acetone powders of orange flavedo ( Citrus sinensis) as discussed by the authors.

TL;DR: In some species of marine phytoplankton, chlorophyll a was degraded to products which do not absorb visible light, and the activities of the two enzymes could be distinguished from each other by inhibited with Mg2+ and/or p-chloromercurobenzoate.

TL;DR: Barley seedling nitrate reductase was stabilized in vitro without the use of extraneous protein by optimizing the buffer components as mentioned in this paper, which consists of 0.25 M Tris-HCl, pH 8.5, 3 mM DTT, 5 μM FAD, 1 μ M sodium molybdate and 1 mM EDTA.

TL;DR: The method was used to assay the chitin in the mycelia of basidomycetes obtained in vitro and the measured amount of glucosamine was proportional to theMycelial biomass and allowed the estimation of fungal growth.

TL;DR: Major phenolic compounds in the shoots of Calluna vulgaris were chlorogenic acid, the 3O-glucoside, 3-O-galactoside and 3- O-arabinosid.

TL;DR: Polyphenol oxidase and peroxidase activities were detected in foliar glandular trichomes of the wild, insect-resistant potato species, Solanum berthaultii.

TL;DR: An essence of fresh Venezuelan mango fruit obtained by well-established procedures possessed the characteristic aroma of the fruit and was analysed by GC/MS using both EI and Cl..

TL;DR: 2,7-Dihydroxy-4-methoxy-9,10-dihydrophenanthrene was isolated and identified from the whole plant of Coelogyne ochracea and C. elata.

TL;DR: Two new stilbene glycoside gallates proanthocyanidins have been isolated from Polygonum multiflorum as discussed by the authors and were shown to be 2″-3″-O-monogalloyl esters of 2,3,5,4′-tetrahydroxystilbinene 2-Oβ-β-d -glucopyranoside.

TL;DR: The number of hydroxyl groups and their position relative to each other and the nature and position of other substituents on the aromatic ring were found to affect the activity of mono- and diphenols.

TL;DR: The substrate specificities of cinnamyl alcohol dehydrogenase (CAD) of angiosperms and gymnosperms were examined using coniferaldehyde and sinapaldehyd as mentioned in this paper.

TL;DR: Hydroxycinnamic acid amides in fertile and cytoplasmic male sterile lines of maize were determined in reproductive organs, developing grains and cobs and marked changes occurred in the HCA amide content of embryo and endosperm during grain development.

TL;DR: A close correlation was found between inter-varietal similarity, as estimated by the electrophoretic banding patterns of certain enzymes, and the leaf protein profiles obtained by 2D-gel electrophoresis.

TL;DR: Two homogeneous isoenzymes of apyrase from Pimpernel and Desiree varieties of Solanum tuberosum were obtained by affinity chromatography on agarose-Cibacron Blue or agaroses-ATP-phosphonate columns.

TL;DR: The main saponin from the fresh tuber of Dioscorea composita was dioscin and from the fermented material 3-O-[α- l -rhamnopyranosyl(1→4)-β- d -glucopyranoyl]diosgenin this article.

TL;DR: In this paper, 35 derivatives of cinnamic acid and related compounds were tested for inhibition against phenylalanine ammonia-lyase (PAL) derived from sweet potato, pea and yeast.

TL;DR: In this article, the biotransformation of foreign substrates with suspension cells of Nicotiana tabacum was tested with (4 R )-(−)- and (4 S )-(+)-carvones.