نتایج جستجو برای: thalictrum
تعداد نتایج: 145 فیلتر نتایج به سال:
Absence of petals, or being apetalous, is usually one of the most important features that characterizes a group of flowering plants at high taxonomic ranks (i.e., family and above). The apetalous condition, however, appears to be the result of parallel or convergent evolution with unknown genetic causes. Here we show that within the buttercup family (Ranunculaceae), apetalous genera in at least...
–Trees in many forests affect the soils and plants below their canopies. In current high-density southwestern ponderosa pine (Pinus ponderosa) forests, managers have opportunities to enhance multiple ecosystem values by manipulating tree density, distribution, and canopy cover through tree thinning. I performed a study in northern Arizona ponderosa pine-Gambel oak (Quercus gambelii) forests to ...
The Balkan Region represents one of the Europe’s major centres of plant diversity, with an substantial number of endemic genera and species having a wide distribution throughout the diverse ecosystems of the region. Plants remain an unequalled source of biochemical diversity and in the last several decades there is an unprecedented interest towards identifying perspective leads of plant origin....
Stomatal characteristics are used as proxies of paleo-environment. Only a few model species have been used to study the mechanisms of genetic and environmental effects on stomatal initiation. Variation among species has not been quantified. In this paper, results from an in situ reciprocal transplant experiment along an elevation gradient in the northeast Tibetan Plateau are reported, in which ...
Abstract Background Nitrogen- and water-use efficiency (NUE WUE) reflect the capacity of plants to take up utilize resources in environments. Although N deposition drought are known affect plant growth persistence, it remains elusive how adjust NUE, WUE their relationship adapt concurrent under context global change. We conducted a field experiment temperate grassland Inner Mongolia, which addi...
dinosaurs rose to predominance among vertebrate herbivores, in terms of both species diversity and biomass (e.g., Romer 1966; McIntosh 1990). Their perceived decline on northern landmasses during the Cretaceous has been linked to the evolution of tooth batteries in ornithischian herbivores (e.g., Lull and Wright 1942; Ostrom 1961; Bakker 1978; Lucas and Hunt 1989). On southern landmasses, in co...
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