Abstract:The total seed free amino acids for 7 species of Thermopsideae (Fabacae) of china range from 2.792 to 12.51 mg/g. dr. wt. Besides high contents of glutamic acid and aspartic acid, very high contents of arginine were also detected in all the species, espec

Abstract:A super-dwarf NC hybrid wheat line named "Xiao Yan Dwarf" about 35era height was selected in the BC9F1 with Agropyron eionyatum (2n=70) as female parent and common wheat as recurrent parent. Cytogenetic analysis of the reciprocal crosses between "Xiao

Abstract:The Ti T-DNA (Transferred DNA from tumor-inducing plasmid) transformed tissues of sunflower have been obtained by invitro infecting cotyledons and hypocotyls with strains B6S3 or T37 of Agrobacterium tumefaciens. Following subculture on hormone-free mediu

Abstract:以经过预培养的斑叶海棠为材料,取叶柄表层3—4层细胞,切成8×10mm大小作为外植体,所用培养基采用MS基本成份附加不伺浓度的2,4-D。结果如下:1.在含0.1mg/l 2,4-D的培养基上,大多数叶柄表皮细胞可以进行一次无丝分裂。与有丝分裂一样,无丝分裂中有核仁和核膜的消失和再现。分裂过程中核始终靠近细胞壁,细胞分隔部分的伸展也是单向的。2.实验中2,4-D对表皮细胞产生了很特殊的效应。在0.1mg/l 2,4-D的培养基上培养45小时后,细胞都发生收缩。收缩以前大多数细胞都有过一次无丝分裂。如果2,4—D的浓度降至0.01mg/l,细胞将反复进行无丝分裂形成疏松的愈伤组织而不发生收缩。

Abstract:It had been found by using scanning and transmission electron microscope that the reticular veins on pileus external surface of Morcheuaescutenta are formed of the sterile prosenchyme. The hymenium composed of paraphyses and asci distributes in the hollow

Abstract:In order to reveal the relationship between respiration and abscission and the action mode of GA_3 in inducing abscission, the influences of GA_3 and two respiratory inhibitors, alone or in combination, on the abscission and respiration of explant of Euon

Abstract:Qinling situated in Central China, is an important distributional limit of endemic to China towards the north. There are 36 genera endemic Spermatophytesto China in Qinling range.Among them 14 are monotypic, 17 are oligotypic and 5 are polytypic ones. The

Abstract:Pollens of Zea may L. contained glucose, fructose and sucrose. There were seventeen free amina acids and eighteen hydrolyzed amino acids for protein, free amino acids are identical with hydrolyzed amino acids bisides threonine, i. e. asparitic acid, serin