Flowering process of Dioscorea zingiberensis C.H.Wright was observed,and pollen viability and stigma receptivity of tetraploidy and diploidy of D.zingiberensis were also compared.The results showed that the anther of ...Flowering process of Dioscorea zingiberensis C.H.Wright was observed,and pollen viability and stigma receptivity of tetraploidy and diploidy of D.zingiberensis were also compared.The results showed that the anther of D.zingiberensis had opened before male flower bloomed.Pollen viability of tetraploidy and diploidy was 59.7% and 74.9% respectively during flowering beginning period,and pollen viability was high in 24 h of flowering but reduced quickly after 36 h.Stigmas of tetraploidy and diploidy maintained a high receptivity in 24 h of flowering and then descended quickly,a part of stigmas of tetraploidy lost the receptivity after flowered 60 h.展开更多
文摘Flowering process of Dioscorea zingiberensis C.H.Wright was observed,and pollen viability and stigma receptivity of tetraploidy and diploidy of D.zingiberensis were also compared.The results showed that the anther of D.zingiberensis had opened before male flower bloomed.Pollen viability of tetraploidy and diploidy was 59.7% and 74.9% respectively during flowering beginning period,and pollen viability was high in 24 h of flowering but reduced quickly after 36 h.Stigmas of tetraploidy and diploidy maintained a high receptivity in 24 h of flowering and then descended quickly,a part of stigmas of tetraploidy lost the receptivity after flowered 60 h.
文摘马肠薯蓣（Dioscorea simulans Prain et Burkill）隶属于薯蓣科（Dioscoreaceae）薯蓣属（Dioscorea Linn.）根状茎组（Sect.Stenophora Uline）^（[1]）278。Prain等^（[2]）根据1928年秦仁昌采自广西罗城县大林山的标本（秦仁昌5319,5335）命名马肠薯蓣,并建立Sect.Illigerestrum Prain et Burkill^（[3]）,将马肠薯蓣归入该组。该组地上茎几乎不分枝,左旋;叶3裂,无毛;雄花簇生成小伞状或总状,花被片呈轮状排列;花药6枚,3大、3小;雌花花被片呈轮状排列,总状花序。
