نتایج جستجو برای: salicaceae
تعداد نتایج: 388 فیلتر نتایج به سال:
جنس salix با بیش از 350 گونه بزرگترین جنس خانواده salicaceae است. این جنس به دلیل عواملی از قبیل تغییرات فنوتیپی وسیع در میان افراد و حتی درون جمعیت های یک گونه، فراوانی بالای دورگه گیری طبیعی، گل های دو پایه و زمان های گلدهی متفاوت گل های نر و ماده یکی از مشکل ترین تاکسون ها برای بررسی های تاکسونومیکی است. در این پژوهش 8 گونه از سه بخشه salix، subalba و helix از دیدگاه های ریخت شناسی، تشریحی، ...
The relationships among sections and species within each section in the genus Populus have attracted much attention from taxonomists biologists. In this paper, we provide an overview of current state phylogenetics discuss origin some hybrid species. There has been controversy surrounding North America subsequent dispersal differentiation other parts world. We present most plausible scenario bas...
abstract in 2008, in a field survey on mites associated with poplar trees in razavi khorasan province (ne.iran), specimens of an eriophyid were collected. the specimens were sent to dr xia-yue hong for identification. as result, the eriophyid aculus dimidiatus (hall) is recorded from iran for the first time. the eriophyid reported here was found vagrant on under surface of leaves of eastern cot...
Characterization of structural woods in historical buildings has a great importance in technological study of applied details. Herein, seven historical buildings located in Alborz, Isfahan and eastern Azerbaijan provinces related to Safavid and Qajar periods have been assessed. Samplings were done from structural woods of the buildings. Samples were prepared, sectioned and evaluated by transiti...
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