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Showing papers in "Phytochemistry in 1993"


Journal ArticleDOI
TL;DR: A checklist of floral scent compounds retrieved by head-space techniques and separated and identified mainly by gas chromatography and mass spectrometry is presented in this paper, based on reports presented in 118 original articles between the years 1966 and 1992.

930 citations



Journal ArticleDOI
TL;DR: The green odour of green leaves arises from eight volatile compounds, C6-aldehydes and C6 alcohols which include leaf aldehyde, (2E) and leaf alcohols as discussed by the authors.

609 citations


Journal ArticleDOI
TL;DR: Based on the lipid compositions, all of the diatom species studied are potentially suitable sources of some of the longer chain polyunsaturated fatty acids.

430 citations


Journal ArticleDOI
TL;DR: Fatty acid compositions and C/N ratios of 28 marine microalgae from nine taxonomic classes were examined, leading to different interpretations concerning the nutritional value of the different species as food for organisms in culture or in the natural environment.

384 citations



Journal ArticleDOI
TL;DR: A review of the distribution of resveratrol oligomers in plants is presented and their biosyntheses are collated in this paper, where a revised structure for gnetin I on biogenetic grounds is proposed.

214 citations


Journal ArticleDOI
TL;DR: In this paper, it is shown that caffeylation of the sophorosyl group has a profound effect on some properties of pelargonidin, e.g. it reduces both the rate and the extent of the pelargonin hydration step.

200 citations


Journal ArticleDOI
TL;DR: In this article, the NMR studies of 10 5,7-dihydroxyflavonoids are reported and the complete assignment of proton and carbon signals is obtained by detailed spectral an

199 citations


Journal ArticleDOI
TL;DR: The engineered belladonna hairy roots showed increased amounts and enzyme activities of the hydroxylase, and contained up to five-fold higher concentrations of scopolamine than wild-type hairy roots, which should be useful for enhancing scopolamines productivity in in vitro root culture systems.

198 citations


Journal ArticleDOI
TL;DR: The data support the view that touch rapidly initiates in B. dioica tendrils the formation of jasmonates from α-linolenic acid which are released as messengers triggering the coiling response, and that PDAME is by itself an active inducer of tendril coiling.

Journal ArticleDOI
Donald Boulter1
TL;DR: A 'copy Nature' strategy for insect pest control is presented which aims to be relatively sustainable and environmentally friendly, and its long-term use may depend on promoting agronomic and farm management which minimizes the build-up of resistance in insect populations.

Journal ArticleDOI
TL;DR: The polyphenoloxidase from Helianthus annuus was purified by a combination of SP-Sephadex G-50 chromatography, DEAE-cellulose chromatography and Sepha.

Journal ArticleDOI
TL;DR: The resins exuded by the flowers of Clusia minor and C. major contained the polyprenylated benzophenones found in the majority of the propolis studied, suggesting that this is the main source for propolis in tropical Venezuela.

Journal ArticleDOI
TL;DR: Two new natural phenolics were isolated from the rhizomes of Curcuma domestica along with four known curcuminoids as discussed by the authors, and the structures of the former wer


Journal ArticleDOI
TL;DR: The production of capsaicinoids in fruits of Capsicum frutescens takes place after the increase in fruit length has ceased, however, before the ons.

Journal ArticleDOI
TL;DR: In this article, the properties of natural and synthesized sesquiterpenes are described, and the occurrences of dehydrojinkoh-eremol and neopetasane in agarwood were also confirmed by comparison of their mass spectral data and R inn on capillary GC with those of synthesized samples.

Journal ArticleDOI
TL;DR: A relationship between polyamines and shelf-life of fruits has also been reported as mentioned in this paper, and polyamine levels seem to be involved in fruit development, although it is difficult to relate any specific polyamine or hydroxycinnamic acid conjugate with the flowering process.

Journal ArticleDOI
TL;DR: Rocaglamide and methyl rocaglate exhibited potent insecticidal activity both through growth inhibition and contact toxicity to the variegated cutworm, Peridroma saucia.

Journal ArticleDOI
TL;DR: The generally reduced sensitivity of R. solani to solanine and chaconine, both individually and in combination, is in keeping with this fungus being a serious pathogen of potato.

Journal ArticleDOI
TL;DR: P-(sulphooxy) Cinnamic acid was isolated as a natural product for the first time from the seagrass Zostera marina and was found to prevent attachment of marine bacteria and barnacles to artificial surfaces at nontoxic concentrations.

Journal ArticleDOI
TL;DR: The main products in the hairy root cultures were the tanshinones which are the active principles of this Plant species, and the effects of culture conditions on hairy root growth and the diterpene production have also been studied.

Journal ArticleDOI
TL;DR: The elucidation of the structure of the first key alkaloidal intermediate in monoterpenoid indole alkaloid biosynthesis, 3 alpha(S)-strictosidine, is presented and the discovery of the enzyme which catalyses the stereospecific formation of this alkaloids precursor from tryptamine and secologanin, strictosidine synthase, is detailed.

Journal ArticleDOI
TL;DR: The novel diterpene phytoalexin, oryzaleXin E was isolated from UV-irradiated rice leaves and the structure and relative configuration of oryzalxin E wer revealed.

Journal ArticleDOI
TL;DR: Various steroid substrates, their metabolites and the micro-organisms used for the transformations are compiled covering the literature for the period late 1987-mid 1992.

Journal ArticleDOI
TL;DR: A survey of phenolic compounds using HPLC was performed in Rutaceae, subfamily Aurantioideae, representing five genera, 35 species and 114 cultivars.

Journal ArticleDOI
TL;DR: The relationship between the structure and the nematicidal activity was elucidated for pinosylvin monomethylether (PSM) and methyl ferulate and PSM showed little anti-acetylcholinesterase activity.

Journal ArticleDOI
TL;DR: In this paper, the authors classified polyphenols of new types which are widely distributed in the Dicotyledoneae of the Angiospermae, into five types: (i) GOG (and GOGOG), (ii) DOG, (iii) GOD, (iv) D(OG) 2 and (v) C -glucosidic type, where G = galloyl, O = oxygen and D = hexahydroxydiphenoyl.

Journal ArticleDOI
TL;DR: In all experiments, (−)-usnic acid was always the most active compound indicating a remarkable correlation of antifeedant activity and acute toxicity, as demonstrated by injection into the larval haemolymph.