Showing papers in "Biochemical Systematics and Ecology in 1987"

TL;DR: Significantly, there was no identifiable relationship between toxicity or toxin profiles and the morphological characteristics conventionally used to separate the two dominant morphotypes into species within this species complex.

TL;DR: Spatial and temporal variation in these constituents produces plant parts, individuals and species with differential resistance to insect herbivores.

TL;DR: Field experiments in which fragments of one individual sponge were transplanted to different conditions of illumination and depth demonstrate that the chemical variability reflects the range of environmental conditions under which R. odorabile lives rather than any genetic differences.

TL;DR: Analysis of dynamic parameters in the quassinoid-limonoid group of families in the Rutales indicates that the Simaroubaceae should form the more primitive taxon, split off from the common ancestral lineage before synthesis of the liminoid precursor.

TL;DR: A crude extract quaking aspen Populus tremuloides exhibits differential bioactivity against subspecies of the eastern tiger swallowtail Papilio glaucus, and components were isolated and identified on the basis of NMR and IR spectra, and chemical methods.

TL;DR: On the basis of the substitution patterns of the sesquiterpene lactones isolated from the Israeli populations which bear a hydroxyl or acetoxy function at C-9 it is suggested that these constitute a chemotaxonomic subspecies in the A. herba-alba complex.

TL;DR: The data indicates that carotenoids play a significant role, equal to that of chlorophyll, as ‘antennae’ absorbing light in the plants.

TL;DR: The toxic compound for leek-moth larvae, Acrolepiopsis assectella has been isolated from the flowers of leek, Allium porrum and identified as 3-O-β-d-xylopymnosyl, identical with aginosid, a saponin isolated earlier from ,Allium giganteum.

TL;DR: One pollination morph in C. simplex was found to contain three benzenoid compounds absent in the two other morphs, which may be involved in herbivore deterrence and behavioural modification in pollinating butterflies.

TL;DR: Glandular trichomes on the epidermal surfaces of Centaurea maculosa contain the sesquiterpene lactone cnicin, and leaves attached to the stems and inflorescence branches had the highest quantities and exhibited greatest interplant variation.

TL;DR: Seasonal variation in the volatile leaf oils of individual trees of Eucalyptus ovata and E. camphora was investigated, and individuals varied characteristically and differently over the sampling period.

TL;DR: The results suggest that homoselection operates in the underground ecotope in accordance with the niche width variation hypothesis, and that bathyergid systematics needs urgent revision, particularly the genus Cryptomys .

TL;DR: A new natural flavonol glycoside, isorhamnetin-3-rutinoside-4′-glucoside, together with rutin, narcissin, quercetin, 3-(2 G -glucosayl)-rutinoide and isorHAMnetin,3-Rutinosides-7-glocoside was identified from the MeOH extract of Mercurialis annua L..

TL;DR: The chemosystematic significance of the addition of Tetradium to the 1-benzyltetrahydroisoquinoline producing genera and the potential of these taxa to have acted as a starting point for biochemical evolution within the Rutaceae is discussed.

TL;DR: Sixteen free flavone aglycones exuded onto the leaf surfaces have been analysed in twenty-three taxa of genus Thymus growing in the Iberian Peninsula and relations with morphological classifications and the usefulness of excreted flavonoids as taxonomic markers are discussed.

TL;DR: The fatty acid patterns are judged evolutionarily conservative, with the strong exception of Cuphea, which remains unique in the Lythraceae and among all angiosperms for the diversity of patterns displayed.

TL;DR: The distribution of glucosinolates is very useful at the species and genus levels but may provide only minimal support to the tribal alliance of certain genera.

TL;DR: The agreement between the morphological data, allozyme data and isoelectric focusing patterns indicates that the rare third putative species of angel shark is biologically valid.

TL;DR: Open-pollinated cones of a single tree appear capable of producing progeny that differ greatly in their monoterpene profiles, and trees at Russell Reservation showed significant variation in quantitative composition among population samples, as well as among open- pollinated familles within populations.

TL;DR: A survey of floral anthocyanins among 87 species of Penstemon shows that floral pigmentation is more highly correlated with pollinator class than with taxonomy.

TL;DR: A considerable proportion of the ingested acids can be recovered from the excreta, but the amounts which remain unaccounted for suggest that metabolic detoxification is the principal mean of disposing of these substances by the insects.

TL;DR: The distribution and quantitative significance of 14 resin acids from 20 species of Grindelia (Asteraceae) in 50 populations from the western U.S. have been determined.

TL;DR: Alkane distribution patterns were determined in the epicuticular wax of eight species of Ericaceae and of Empetrum hermaphroditum and some uniformity in patterns was noted in the subfamily Arbutoideae, whereas diversity prevailed in Rhododendroideae and Vaccinioideae.

TL;DR: Cortex resin collected from 7-year-old trees of Pinus brutia from different seed sources growing in experimental plots was analyzed by GLC and GC-MS, implying the occurrence of genotypic variation.

TL;DR: In this paper, the content and composition of essential oil of ten peppermint genotypes were analyzed over three years and the parameters varied both in relation to year of investigation and the genotypes examined.

TL;DR: The results of ordination and cluster analysis performed on chemical data allowed the identification of four chemical types of A. alba, mainly sesquiterpene hydrocarbons when growing in thermophytic plant communities and mostly oxygenated monoterpenes in mesophytic plants communities.

TL;DR: The rhodoxanthin content in the leaves of 15 gymnosperm species from sunny and shaded sites was determined and more rhod oxanthin was noted in the Leaves of all Gymnosperm examined from sunny sites.

TL;DR: It is assumed that Vicieae and Leguminosae lectins are, like Con A, three-domain proteins whose amino acid sequences have been slightly modified during evolution, thus appearing as good phylogenetic markers of speciation.

TL;DR: The average heterozygosity of bisons in Polish herds is 3.5%, which does not differ from those found in populations of other large mammals in spite of restoration of the European bison population from a mere 13 individuals.

TL;DR: Chemical data support a polyphyletic origin for the geographically mediterranean part of the complex with several subphyla originating from D. aschersoniana -like, smithii-like and secondarily juncinella -like diploids.