نتایج جستجو برای: biosystematic
تعداد نتایج: 110 فیلتر نتایج به سال:
Specialized compounds from photosynthetic organisms serve as rich resources for drug development. From aspirin to atropine, plant-derived natural products have had a profound impact on human health. Technological advances provide new opportunities to access these natural products in a metabolic context. Here, we describe a database and platform for storing, visualizing and statistically analyzi...
The Center for Forest Mycology Research (CFMR) at the Forest Products Laboratory in Madison, WI is one of the few remaining mycological research labs left in the USDA-Forest Service. Traditionally established to study the taxonomy of pathogenic root rot, sap-rot, and heart-rot fungi, the group has changed its focus in recent years towards the biosystematics and ecology of both pathogenic and sa...
Allium section Codonoprasum includes a group of evolutionarily young taxa with unclear taxonomic boundaries, evolutionary relationships and complex synonymy. The most complicated taxon in this is A. paniculatum, which until recently was considered to be the widespread morphologically variable species, distribution extending from Mediterranean area central Europe Pontic region. A recent study ha...
Polyploidy is a mutation with profound phenotypic consequences and thus hypothesized to have transformative effects in plant ecology. This is most often considered in the context of geographical and environmental distributions-as achieved from divergence of physiological and life-history traits-but may also include species interactions and biological invasion. This paper presents a historical o...
Despite their complex evolutionary histories, aquatic plants are highly underrepresented in contemporary biosystematic studies. Of them, the genus Callitriche is particularly interesting because of such evolutionary features as wide variation in chromosome numbers and pollination systems. However, taxonomic difficulties have prevented broader investigation of this genus. In this study we applie...
Fifteen populations of Pimpinellifoliaeae section from the species; Rosa pimpinellifolia, R. hemispherica, R. foetida and a new species, R. abrica, were collected from eight provinces of Iran and were studied on the basis of their morphological characters. In each population five plants were randomly selected and some branches were harvested in spring and autumn for studying their vegetative an...
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