苜蓿雄性不育系MS-4雄蕊发育的细胞形态学研究

Cyto-morphologyical Studies on the Stamen Development of Male Sterile Line MS-4 of Alfalfa

通过直接压片和连续石蜡切片法对苜蓿雄性不育系MS-4雄蕊发育的细胞形态学进行了观察分析,寻找其雄性不育形成的细胞学原因.结果表明:不育系MS-4花粉败育的时期是在小孢子四分体分开至单核花粉粒时期,花药绒毡层细胞形态的变异是苜蓿雄性不育系MS-4花粉败育的主要细胞形态学原因.

The cyto-morphology of stamen development of alfalfa sterile line MS-4 was studied by using pressure section and paraffin section.The results were as follows:pollen abortion of MS-4 appeared in the monokaryotic stage of pollen grain after the division of microspore tetrad.Changes of anther tapetum cells was considered as a key factor influencing on the pollen abortion. 