32 research outputs found
Carbohydrate metabolism genes and pathways in insects: insights from the honey bee genome
Carbohydrate-metabolizing enzymes may have particularly interesting roles in the honey bee, Apis mellifera, because this social insect has an extremely carbohydrate-rich diet, and nutrition plays important roles in caste determination and socially mediated behavioural plasticity. We annotated a total of 174 genes encoding carbohydrate-metabolizing enzymes and 28 genes encoding lipid-metabolizing enzymes, based on orthology to their counterparts in the fly, Drosophila melanogaster, and the mosquito, Anopheles gambiae. We found that the number of genes for carbohydrate metabolism appears to be more evolutionarily labile than for lipid metabolism. In particular, we identified striking changes in gene number or genomic organization for genes encoding glycolytic enzymes, cellulase, glucose oxidase and glucose dehydrogenases, glucose-methanol-choline (GMC) oxidoreductases, fucosyltransferases, and lysozymes
Própolis produzida no sul do Brasil, Argentina e Uruguai: evidências fitoquímicas de sua origem vegetal
Foliar phenolic compounds of ten wild species of Verbenacea as antioxidants and specific chemomarkers
Screening antimycobacterial activity of Baccharis dracunculifolia, Centella asiatica, Lantana camara and Pterodon emarginatus
Ação do extrato de própolis sobre a fermentação in vitro de diferentes alimentos pela técnica de produção de gases
The correlation between the phenolic composition and biological activities of two varieties of Brazilian propolis (G6 and G12)
Production of verbascoside in callus tissue of Eremophila spp
Callus tissue cultures of Eremophila denticulata and E. decipiens accumulate up to 20% of their dry weight as a mixture of hydroxyphenylethanol glycosides of which the major component is the caffeoyl ester, verbascoside (acteoside). The production of this compound under a variety of growth conditions has been studied. Verbascoside has also been isolated from callus tissue of E. clarkei, E. drummondii, E. glabra and E. viscida
A compound from smoke that promotes seed germination
Exposure of seeds to aerosol smoke or crude smoke extracts stimulates the germination of a number of fire-dependent and fire-independent plant species. We now report the identity of a germination-promoting compound present in plant- and cellulose-derived smoke. The structure of this compound, deduced from spectroscopic analysis and confirmed by synthesis, was shown to be that of the butenolide 3-methyl-2H-furo[2,3-c]pyran-2-one (1). Here we show that 1 promotes germination of a number of plant species at a level similar to that observed with plant-derived smoke water