رضا شیخ‌اکبری مهر
دانشجوی دکتری / دانشکده علوم زیستی دانشگاه شهید بهشتی
[ 1 ] - A NEW ISOLATED SPECIES OF THE GENUS ASTRAGALUS FROM AZERBAIJAN, IRAN
During investigation on the genus Astragalus L., in various geographical regions of Iran, a new species (A. montismishoudaghi) was recognized and thus described here. This new species is closely related to A. ledinghamii, with some morphological differences and a great geographical disjunction.
[ 2 ] - Phylogeny of Astragalus L. Sect. Hololeuce Bunge and related species based on morphological characters in Iran
Astragalus L. is the largest genus of flowering plants in Iran and has various complicated taxonomical difficulties in its classification. Astragalus sect. Hololeuce Bunge. with its closely related section (Sect. Onobrychoidei DC.) comprise a taxonomically complex group within bifurcate hair ones. Delimitation of mentioned sections is the most challenging issues. In this study, 9 species of Holol…
[ 3 ] - Phylogenetic study of some bifurcate hairy sections belonging to Astragalus L. with emphasis on sect. Ornithopodium, based on morphological and molecular data in Iran
In this research, total of 15 species belonging to Astragalus section Ornithopodium as well as its closely related ones were analyzed using morphological and molecular data. A. frigidus and A. stocksii were selected as outgroups based on previous studies. Based upon our results, species of sect. Ornithopodium along with those of sect. Onobrychoidei were placed within a single large clade with hig…
[ 4 ] - مطالعه بوم شناختی، فیزیونومی و فلورستیک منطقه بیابانی کوه نمک قم
چکیده: فرآیندهای جبر گرایانه و اتفاقی در سازماندهی اجتماعات گیاهی مؤثر است ولی اهمیت هرکدام به عوامل مختلفی از قبیل نوع اکوسیستم بستگی دارد. اکوسیستم های بیابانی از شکننده ترین اکوسیستم‌ها هستند. رویشگاه های مذکور مساحت بسیار وسیعی از استان قم را در بر می‌گیرند. نواحی شمالی، شرقی و جنوب شرقی این استان را نواحی بیابانی در بر گرفته است. هدف از این مطالعه بررسی برخی از فاکتورهای اکولوژیکی مؤثر بر پو…
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