نتایج جستجو برای: stipa
تعداد نتایج: 511 فیلتر نتایج به سال:
PREMISE OF THE STUDY Stipa breviflora (Poaceae) is one of the dominant species of the desert steppe in the eastern Eurasian grasslands. Simple sequence repeat (SSR) markers were developed for use in genetic diversity studies of this species. METHODS AND RESULTS A total of 1954 potentially polymorphic loci were obtained by comparing transcriptome data of eight different S. breviflora individua...
مراتع از گونه های گیاهی مختلفی تشکیل شده است که هر یک از آن ها دارای فنولوژی و اندازه خاص خود می باشند. آگاهی از این خصوصیات در گونه های گیاهی مهم یک سایت مرتعی به عنوان یکی از ایزار مدیریت مرتع در آن عرصه تلقی می شود. بررسی مراحل فنولوژیکی و تغییرات اندازه 2 گونه گیاهی stipa barbata desf و stipa caucasica schmalh در مراتع استپی ندوشن یزد طی دوره 4 ساله (89-1386) با این هدف انجام شده است....
A new name, Piptochaetium fuscum, is provided for a taxon hitherto known as Piptochaetium setosum (Trin.) Arechav. Morphological, anatomical, and molecular studies that argue against including Piptochaetium in Stipa, and hence use of S. purpurata (Phil.) Columbus & J.P. Sm., are cited.
Studies on grasshopper diets have historically employed a range of methodologies, each with certain advantages and disadvantages. For example, some methodologies are qualitative instead of quantitative. Others require long experimental periods or examine population-level effects, only. In this study, we used real-time PCR to examine diets of individual grasshoppers. The method has the advantage...
Loss of plant diversity with increased anthropogenic nitrogen (N) deposition in grasslands has occurred globally. In most cases, competitive exclusion driven by preemption of light or space is invoked as a key mechanism. Here, we provide evidence from a 9-yr N-addition experiment for an alternative mechanism: differential sensitivity of forbs and grasses to increased soil manganese (Mn) levels....
Taxonomic Revision of the Eurasian <I>Stipa</I> Subsections <I>Stipa</I> and <I>Tirsae</I> (Poaceae)
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