Showing papers in "Phytochemistry in 1977"

TL;DR: Recent advances in knowledge of the proteinase inhibitors of plants and micro-organisms are reviewed and details of the specificity, occurrence and distribution of these proteins are summarized, and modern methods for their isolation, purification and assay are discussed.

TL;DR: Inorganic analyses and shoot sap osmotic pressure values of 14 plant species exhibiting a wide range of salt resistance as halophytes, semi-resistant glycophytes and sensitive glyophytes confirm that osmosis compensation at high salt levels is largely achieved by the accumulation of Na salts.

TL;DR: The results of feeding radiolabelled precursors are consistent with the proposal that resveratrol, in common with other plant stilbenes, is biosynthesised by the phenylalanine-polymalonate pathway.

TL;DR: All 25 species of Acer examined contain condensed (proanthocyanidins) and hydrolysable (gallo- and/or ellagi-) tannins, but each of these varies ov.

TL;DR: Experimental facts are surveyed providing evidence that substrate (phenylalanine) supply rather than enzymic (PAL) activity is the most likely limiting factor in controlling phenylpropanoid accumulation.

TL;DR: Cell walls separated from the aerial parts of Lolium multiflorum, Lolium perenne and Phleum pratense contained bound cis and trans ferulic and p -coumaric acids and diferulic acid and these acids were released from the walls by treatment with sodium hydroxide.

TL;DR: It is concluded that many of the secondary compounds found in seeds are likely to be toxic to at least some animal, and thus to be responsible at least in part for the extreme host-spetity shown by seed-eating insects.

TL;DR: In this paper, the occurrence and significance of procyanidins in the plant kingdom are reviewed and stages in the elucidation of the structure and the stereochemistry of the procyaneidins are outlined.

TL;DR: In this article, an organometallic complex of nickel has been isolated from nickel-accumulating plants of New Caledonia and has been identified by a combination of infrared spectroscopy, highvoltage paper electrophoresis, gas-liquid chromatography and mass spectrometry.

TL;DR: In this paper, the authors bestatigt sich die schon eingangs erwahnte Festellung, das in Eine klare Differenzierung der Gattung Senecio von den Nachbargruppen von der Seite der Inhaltsstoffe her, ist nach wie vor problematisch.

TL;DR: The recognition of acetone and polyhaloacetones in these extracts suggests biological halogenations occur which result in haloform reactions.

TL;DR: A comprehensive and up-to-date listing of the distribution of phenethylamines in the Plant Kingdom is provided because of their considerable physiological activity in higher animals and their distribution in plants is of importance.

TL;DR: In this article, polyamine levels in barley seedlings grown in the dark or in diurnal illumination were determined, by direct dansylation, 3, 6 and 12 days after g

TL;DR: In this paper, a screen of 61 species of Cercospora grown on a potato-agar medium showed the presence of the phytotoxin cercosporin in 24 of them, and of dothistromin in 8.

TL;DR: In this article, the 13 C NMR spectra of 15 flavonoid and 9 isoflavonoid substances of various ring C oxidiation states were analyzed and their carbon shifts assigned.

TL;DR: In this paper, a search for growth and germination inhibitors in rice husk (Oryza sativa L. cv Koshihikari) revealed four compounds, ineketone, S (+)-dehydrovomifoliol, momilactone-C and p -coumaric acid, in addition to the previously known motherilactones-A and -B.

TL;DR: In this article, nutritional factors affecting the biosynthesis of shikonin derivatives in callus cultures of Lithospermum erythrorhizon were examined, and the results showed that high concentrations of nitrogen sources inhibited or retarded shikin derivative formation and streptomycin sulphate stimulated their biosynthesis.

TL;DR: Sucrose was present in seeds of 31 species at all ages and stages of their development, and maltose, a sugar rarely found in plant tissues, is present in immature soybean and honey locust seeds but does not occur in the other seeds examined.

TL;DR: Zein extracted from maize endosperm has been fractionated into four polypeptide chains, having the following MWs 23 000, 21 000, 13 500 and 9600, and by amino acid analysis the two smaller MW chains (representing 30% of total zeins) have been found to be zein-type molecules.

TL;DR: The location in the seed, molecular properties and biological role of protein α-amylase inhibitors from wheat are discussed, and genetic aspects of the albumin inhibitor production and the possibility of improving nutritional value and insect resistance are described.

TL;DR: The lipids of the Caldariella group of extremely thermophilic acidophilic bacteria are based on a 72-membered macrocyclic tetraether made up from two C40 diol units and either two glycerol units or one glycersol and one nonitol.

TL;DR: The authors showed that tomato homogenates of tomato fruits catalysed the enzymic conversion of linoleic and linolenic acids (but not oleic acid) to C 6 aldehydes in low (3-5%) molar yield.

TL;DR: New diterpene glycosides, dulcosides A and B were isolated from Stevia rebaudiana Bertoni and their structures were established as 19- O -β-glu as mentioned in this paper.

TL;DR: Dehydroascorbate reductase was detected in the leaves of several plants and has been partially purified from spinach leaves and has a MW of ca 25 000 and Cysteine cannot replace GSH as a donor.

TL;DR: An analogous system consisting of a nitrate reductase dimer that spans a unit membrane plus an ATPase is proposed to be responsible for nitrate transport and reduction in some algae and chloroplasts.

TL;DR: The induction and subsequent changes of CAH activity during ageing are accounted for by the variations in reductase and cytochrome P-450 content.

TL;DR: In analogy to the known malate-oxalacetate shuttles, the possibility is discussed that this cell wall-associated malate dehydrogenase is involved in the transport of cytoplasmic reducing equivalents through the plasmalemma into the cell wall.

TL;DR: The investigation of twelve further species of the Eupatorium complex affords four new germacrolides and seven guaianolides together with new thymol and p-hydroxyacetophenone derivatives as discussed by the authors.

TL;DR: Free amino acids in the seeds of 80 species of Acacia have been determined and one of the ‘marker’ amino acids of the Afro-Asian group is the neurotoxic lathyrogen α-amino-β-oxalylaminopropionic acid.