Sedum Daigremontianumsp. nov.

A Genetic Transformation Method for Cadmium Hyperaccumulator Sedum plumbizincicola and Non-hyperaccumulating Ecotype of Sedum alfredii

The present study demonstrates the development of an Agrobacterium-mediated genetic transformation method for species of the Sedum genus, which includes the Cd/Zn hyperaccumulator Sedum plumbizincicola and the non-hyperaccumulating ecotype of S. alfredii. Multiple shoots were induced from stem nodes of two Sedum plants using Murashige and Skoog (MS) medium containing 0.1 mg/L cytokinin 6-benzyl...

Sedum Acre Embryogenesis: Polyploidization in the Suspensor

Cytological processes of differentiation in the embryo suspensor of Sedum acre L. were compared with the development of the embryo proper. The zygote undergoes an asymmetric division to produce an apical cell and a basal cell, which becomes the basal cell of the suspensor. The mature differentiated suspensor consists of a large haustorial basal cell and 3–4 chalazal cells. The basal cell nucleu...

معرفی دو گونه جدید Williamsonia iranica sp. nov . و sp. nov. Ginkgoites persica

    عضو قدیر از بالایی ترین بخش سازند نایبند به سن رتین (تریاس بالایی) دارای برونزدگی بسیار خوبی در منطقه معادن پروده، جنوب غرب شهر طبس می باشد. دو نمونه جدید از ماکروفسیل‌های گیاهی این سازند متعلق به بازدانگان برای اولین بار از عضو قدیر سازند نایبند مورد شناسایی قرارگرفت که در این مقاله معرفی می‌شوند. این گونه‌ها عبارتند از: Williamsonia iranica sp. nov. متعلق به راسته بنتیتال‌ها (Order Bennet...

Sedum Peltatum (crassulaceae): a New Species from Anhui, China

Sedum peltatum M.L. Chen et X.H. Cao, belonging to the family Crassulaceae DC., is described and illustrated from China as a new species. It was collected from Nanwu canyon, Huangnikeng valley, Gaokeng valley and Qingshikeng valley in the Jiulong Mountains, China (P. R.). Morphological diagnostic characters of closely related species are also discussed. Introduction Sedum L. is the largest and ...

معرفی دو گونه ی جدید موریانه . Anacanthotermes esmailii sp. Nov و .Microcerotermes chhotanii sp. Nov از ایران