نتایج جستجو برای: fraxinus excelsior l
تعداد نتایج: 618912 فیلتر نتایج به سال:
Gene flow dynamics of common ash (Fraxinus excelsior L.) is affected by several human activities in Central Europe, including habitat fragmentation, agroforestry expansion, controlled and uncontrolled transfer of reproductive material, and a recently introduced emerging infectious disease, ash dieback, caused by Hymenoscyphus fraxineus. Habitat fragmentation may alter genetic connectivity and e...
Long-Term Effect of an Aqueous Fraxinus excelsior L. Seed Extract in Spontaneously Hypertensive Rats
The effect of long-term intake of different doses (20, 40, and 60 mg/kg/day) of a Fraxinus excelsior L. seed extract (FESE) on spontaneously hypertensive rats (SHR) was evaluated. Water was used as control and captopril (50 mg/kg/day) was used as positive control. Systolic blood pressure, body weight, and food and liquid intake were registered weekly in SHR. The antioxidant and vascular relaxin...
زیر گونه fraxinux excelsior subsp. excelsior برای اولین بار از ایران گزارش می شود. دو واریتهfraxinus angustifolia subsp. syriaca var. pilosa و f. angustifolia subsp. persica var. pubescens بر اساس نمونه های متعدد هرباریومی موجود و جمع آوری شده از غرب (زاگرس) به عنوان واحدهای جدید نامگذاری و شرح داده می شوند. ترکیب جدید fraxinus angustifolia subsp. persica نیز معرفی می گردد. مطالعات صحرایی ن...
We used chloroplast polymerase chain reaction-restriction-fragment length polymorphism (PCR-RFLP) and chloroplast microsatellites to assess the structure of genetic variation and postglacial history across the entire natural range of the common ash (Fraxinus excelsior L.), a broad-leaved wind-pollinated and wind-dispersed European forest tree. A low level of polymorphism was observed, with only...
During post glacial colonization, loss of genetic diversity due to leading edge effects may be attenuated in forest trees because of their prolonged juvenile phase, allowing many migrants to reach the colonizing front before populations become reproductive. The northern range margins of temperate tree taxa in Europe are particularly suitable to study the genetic processes that follow colonizati...
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