Showing papers in "Biochemical Systematics and Ecology in 1986"

TL;DR: This review summarizes the present knowledge regarding the biological activities of sesquiterpene lactones and their structure-activity relationships and suggests their evolutionary significance in plants as deterrents against herbivores and anti-fungal, anti-bacterial allelopathic agents.

TL;DR: A preference scale has been obtained for selected plant species and it may be deduced that plants containing potent constituents against mammals are readily accepted by land molluscs, whereas plants generally avoided by mollUScs are those containing tannins and phenolics.

TL;DR: The components of the leaf oils from seventeen species in the nine genera of the four families of Abies, Picea, Cedrus, Pinus, Tsuga, Larix, Sciadopitys, Torreya and Cryptomeria have been studied quantitatively.

TL;DR: Low herbivore damage was significantly correlated with higher concentrations of particular compounds (e.g. caryophyliene) combined with higher variability of most of the components of the leaf sesquiterpenes.

TL;DR: Based on the results of their localization in the plant as well as on the available experimental evidence on related compounds, a possible ecological significance of the compounds as feeding deterrents and/or allelopathic substances is suggested.

TL;DR: In all species the phenolic content, astringency, nitrogen and water content decreased whereas the leaf specific weight and toughness increased as the leaf attained maturity, although the pattern of sesquiterpene variation during leaf development, however, differed among the species.

TL;DR: Nine species of Lantana, Lippia, Aloysia and Phyla examined for iridoids and cornoside show a good correlation with the classification proposed by El-Gazzar and Watson.

TL;DR: An examination of the roots of Murraya for the presence of the dimeric indole yuehchukene has revealed a dichotomy in the genus between species producing this alkaloid and those producing the carbazole alkaloids girinimbine, with no apparent overlap between the two groups of species.

TL;DR: Analysis of isozyme banding patterns produced by eight pyridine-linked dehydrogenases revealed a high degree of genetic polymorphism within and between morphotypes and geographical populations of the Protogonyaulax/catenella species complex.

TL;DR: Results support the concept that variation in individual compounds could provide an effective defensive strategy against herbivores and pathogens, and also establish a suitable time period for minimizing variation in sample collections.

TL;DR: The combination of flavonoid data with published information on a variety of other characters leads us to agree with the position of Bergenia as a member of Saxifragaceae in the restricted sense.

TL;DR: In this paper, structures for three new flavonoids of D. aurantiacus have been proposed, two of which are monomethoxylated derivatives of the two most abundant resin flavonoid while the third has one less phenolic group.

TL;DR: In this article, the authors found that the cladonia verticillaris grows in sunny and shaded locations and has more methyl β-orcinol carboxylate, orcinol and fumarprotocetraric acid than those found in unshaded locations.

TL;DR: The iridoid content of the Castilleja species were all qualitatively similar and the adult moths contained rhexifoline alkaloid, but at a low concentration level.

TL;DR: Comparison of patterns found for flavone glycosylating genes, seed, pollen and capsule morphology elucidated the evolutionary history of S. pratensis in Europe since the last Ice Age and can begin to determine the evolutionary relationships within section Elisanthe by comparing the variations known for other species.

TL;DR: The occurrence of considerable qualitative and quantitative variation in the glyceollins produced by various Glycine spp.

TL;DR: In this paper, a series of polyacetylenes and thiophene derivatives from the plant family Asteraceae were examined in relation to their photosensitizing activity to E. coli and S. cerevisiae cultures.

TL;DR: Data is presented demonstrating that little or no PGA2 is released from colonies of P. homomalla, and suggesting that neither 15(S)- PGA2 nor 15(R)-PGA2 inhibits the fouling of gorgonian axial skeletons.

TL;DR: A survey of genotypic diversity at 10 polymorphic enzyme loci in 855 isolates of Daphnia from three sites in northwestern Canada revealed a total of 46 genetically different clones, suggesting that the two ‘species’ are members of a single agamic complex.

TL;DR: A study of the leaf flavonoids, furanocoumarins and essential oils of 51 species of the tribe Psoraleeae (Fabaceae) has provided chemical data to support the recent subdivision of the large worldwide genusPsoralea into a number of segregate genera.

TL;DR: Protein contents and protein amino acid compositions of different regions of leaf blades and of leaves representing different physiological ages, taken from Aranda Christine and Languas galanga showed little intraspecific variation, but leaf amino acids of 25 plant species covering the major taxonomic groups of the Monocotyledonae showed variation and group by group comparisons revealed taxonomic patterns.

TL;DR: The two basic micromolecular phenomena which accompany the introduction of a novel lineage in angiosperms, vigorous increase in oxidation state of allelochemics and reduction of the number of major biosynthetic routes are shown to characterize the evolutionary development of sesquiterpene lactones in tribes of Asteraceae.

TL;DR: The presence of 41 carotenoids in 114 species of Lepidoptera was determined and zeaxanthin, β-cryptoxanthin), lutein epoxide, astaxanthIn, lycopene, torulene and canthaxanthins were determined.

TL;DR: Application of the more common drop diffusate procedure results in the predominance of positive phytoalexin responses in cultivated (rather than in wild) species, while the facilitated diffusion procedure leads to comparable results for cultivated and wild species.

TL;DR: The composition of leaf carotenoids in the leaves of 25 species of trees were studied during the whole growing season, finding mainly xantophyll epoxides and apocarotenals like apo-12′-violaxanthal.

TL;DR: The method described facilitates the quantification of small amounts of cyanogenic compounds in plant material, with a detection limit about 60 ng of released HCN (equivalent to 1μg of amygdalin).

TL;DR: Results from this study support the hypothesis by Stock according to which Typhlocirolana, as well as other ‘thalassoid’ hypogean Crustaceans, colonized ground-waters in connection with the sedimentary cycles of the Mediterranean coastal lines during the Upper Miocene or Lower Pliocene.

TL;DR: The presence of 14 leaf carotenoids was studied in 26 species of gymnosperms and Rhodoxanthin was present in all the species of the Taxaceae, Taxodiaceae and Cupressaceae.

TL;DR: Two elevation-related chemotypes of red oak occur in the southern Appalachians and some quantitative intrapopulational variation in flavonoid constituents exists between high and low elevation grown trees, but is slight and primarily restricted to minor components.