大白菜雄性不育系88-3花药和花粉发育的细胞形态学观察

摘要

When the sterile plant of male-sterile meanline of cabbage 88-3 flowering,there is no pollen grain in the anther.Abort occurs from the stage of microspore mothercell to binuclear pollen grain and its peak happens around the final stage Ⅱ of meiosis.Male-abort includes such three forms as following microspore mothercell cantt reach or finish the meiosis stage;microspore cant develop normally.A sudden complete disintegration or coagulating into a ball is the common character of abort.Male-sterility mainly results from the abnormality of mesospore,tapetum tissue and vascular bundle.%大白菜雄性不育两用系88-3的不育株，其开花时花药内无花粉粒；败育从小孢子母细胞至二核花粉粒皆有发生，高峰期在末期Ⅱ前后；小孢子母细胞不能进入减数分裂和小孢子母细胞不能完成减数分裂及小孢子不能正常发育是雄性败育的主要形式；败育一旦发生便是急剧而彻底地解体或凝聚成一团是败育的共同点；中层组织、绒毡层组织及药隔维管束异常均是雄性败育的因素。