Showing papers in "Biochemical Systematics and Ecology in 1984"

TL;DR: It is suggested that in P. hysterophorus, the water soluble plant metabolites play an important role not only in allelopathy and defense against herbivorous predators and diseases but also as autotoxins in population regulation and the timing of the germination processes.

TL;DR: The volatile irritants produced by the larvae are well suited to repel small arthropods, whereas poisons associated with aposematic coloration in the adults could be directed against small vertebrates, such as birds.

TL;DR: The fatty acid content of 30 species of Porifera, including samples of Hexactinellida and Lithistida for which no fatty acid data previously existed, have been examined and peculiarities in proportions of individual acids of particular chain lengths distinguish the phylum.

TL;DR: The comparison presented here showed that the conjugated α-exomethylene moiety of the lactone ring was not the decisive factor for the deterrent activity in the investigated test model, and may be included to the class of very good insect feeding deterrents.

TL;DR: Evolutionary trends of meliacin chemistry thus correspond to the morphological division of the Meliaceae, according to their basic skeletal specialization and state of oxidation.

TL;DR: Bisabolangelone, tested on the same insects, exhibited the strongest activity, and may be included in the class of very good insect feeding deterrents.

TL;DR: The occurrence of 2-[2-phenyl-ethyne-1-yl]-5 acetoxymethyl thiopene in Bidens has not been previously reported and its ubiquitous presence is consistent with other evidence that the Hawaiian species are all derived from a single ancestral immigrant to the islands.

TL;DR: Six amino acid components of the free amino acid pool of leaves of Calliendra species were tested for insticidal activity against a polyphagous herbivore Spodoptera frugiperda and negative effects on growth, metamorphosis, and survival were observed.

TL;DR: The antifungal activity of sesquiterpene lactones cannot be explained by the presence or absence of two potential active sites (the exocyclic methylene and, in pseudoguaianolides, a β-unsubstituted cyclopentenonel) but other functions must play a role in enhancing or reducing this activity.

TL;DR: Ultraviolet absorption in petals of Potentilla species with yellow flowers is provided by both the yellow chalcone isosalipurposide and by colourless flavonol glycosides, which was detected in about half those species with patterning but also occurred in several where the whole petal is absorbing.

TL;DR: An analysis of isozyme variation of five enzymes among 17 strains of the brackish-water rotifer, Brachionus plicatilis, using thin-layer polyacrylamide electrophoresis showed that it was possible to resolve genetic differences.

TL;DR: Proximate analysis shows that water content increases with starvation time whereas protein and lipid contents decrease, and nitrogen excretion remains stable from day 2 to day 14.

TL;DR: The occurrence of xanthone O- and C-glycosides in ferns is reviewed and their major value appears to be in the identification of allopolyploidy.

TL;DR: Seasonal and plant-part variability in glucosinolate content and spatial patchiness of glucosInolate phenotypes contribute to the variation in herbivore occurrence and damage documented in previous studies of this native crucifer.

TL;DR: It is suggested that the α-methylene-γ-lactone moiety is responsible for the detrimental properties of selected pseudoguaianolides on survival of flour beetles, whereas theα-β-unsaturated ketone functionality (present in tenulin, parthenin, and helenalin)does not contribute to those properties.

TL;DR: Calculations of a similarity index based on the mobility of various bands indicate that man, chimpanzee and baboons are very similar.

TL;DR: Flavonoid data are of little help in determining ancestries of polyploid species, but do rule out S. sarrachoides as a progenitor of S. villosum and S. nigrum .

TL;DR: Re-evaluation of previous reports suggests the wide-spread occurrence of related carotenoid disaccharides in Dinophyceae for which they are considered a new chemosystematic marker.

TL;DR: One species, A. viscosa, a rare volcanic endemic, exhibits the most elaborate and specialized flavonoid profile within the subgenus Austromontana, resulting in the formation of several rare, endemic species.

TL;DR: This analysis brings no genetic justification for the separation of these five species of the Astacidae into two sub-families, but the distinction between the genera Astacus and Austropotamobius seems confirmed.

TL;DR: Using a liquid defined medium for the bioassays, the effects of tannic acid, naringin and 4-hydroxycoumarin on the growth of an ant-cultivated fungus were determined and indicated greater growth retardation than was obtained during bioassay on solid agar media.

TL;DR: It is suggested that there is a connection between the presence of an accessory chromosome and the histological, anatomical and chemical physiognomy of a particular population, which would involve considerable practical implications in the field of pharmaceutics.

TL;DR: Flavonoids were characterized from the leaves, stems and inflorescences of eight species of labiates of section Agastache and there is a trend of reduction in number of compounds from the western to the eastern United States species.

TL;DR: Four species of Cedus are widely distributed over the Asian subcontinent and are well known for their wood and medicinal properties and have been investigated extensively over the last three decades.

TL;DR: The goldfish, Carassius auratus, is a karyotypically tetraploid form that expresses only 19% of its enzyme-encoding loci in duplicate, which may be related to the intense selective and drift processes associated with its domestication.

TL;DR: All perennial wild species analysed including Glycine canescens and G. latifolia have the isoflavonoids genistin (genesitein 7- O -glucoside), daidzein and coumestrol in the leaves.

TL;DR: Eleven sesquiterpenes have been examined as potential moleuscicides against the planorbid snail Biomphalaria havanensis and the most potent compound was helenalin followed by pyrethrosin.

TL;DR: In this paper, the esterase activities of Penaeus japonicus hemolymph, revealed by a mixture of α- and β-naphtylacetate exhibit tricircadian variations under an LD:12-12 photoperiod.

TL;DR: The isozymes of nine enzyme systems were screened and the frequencies of the flavone glycosylating genes were determined in an outdoor experiment with 70 populations of European S. pratensis and an indoor experiment with 30 populations of the same species.