西瓜雄性不育花芽显微结构观察

以西瓜雄性不育两用系为材料,利用常规石蜡切片对其雄花芽组织和细胞形态发育过程进行了观察,探讨了西瓜雄性不育的机理.结果表明,不育花药壁组织在发育过程中,没有分化形成正常的内壁、中层及绒毡层,不能为花粉母细胞的发育提供物质、能量和信息的传递,造成花粉母细胞在减数分裂期发生异常,不能形成正常的四分体,因而未能形成正常的花粉粒而导致败育.

Histological observation of watermelon male sterility flower buds

The histological observations were made on male flower bud tissue and cell of watermelon dual-use male sterile line during development by conventional paraffin section,and partial mechanisms of male sterility were discussed.The results showed that the cell wall organization during anther development failed to divide into inner-wall,middle and tapetum normally,and not to provide material,energy and information transfer for the development of pollen mother cells,resulting in the occurrence of abnormal pollen mother cells separatist period;thus which could not form a normal pollen grains which led to abortion.