兰州百合小孢子母细胞减数分裂异常现象的观察  

Observations on abnormal meiosis of pollen mother cells in Lilium davidii var.unicolor

作　　者：李雪[1] 陈丽梅[1] 杜捷[1] 梁万福[1] 幸亨泰[1] 

机构地区：[1]西北师范大学生命科学学院,兰州730070

出　　处：《西北植物学报》2003年第10期1796-1799,共4页Acta Botanica Boreali-Occidentalia Sinica

基　　金：西北师范大学科技创新工程资助项目( NWNU-KJCXGC-02)

摘　　要：对兰州百合 Liliumdavidiivar.unicolor 小孢子母细胞减数分裂异常进行了研究,发现存在不等二价体、同源染色体早分离、染色体桥、不均等分离、滞后染色体、核外染色体、微核等.分析了这些异常形成的可能机制及对正常小孢子形成的影响.人工花粉萌发实验表明:小孢子母细胞减数分裂异常是导致花粉败育的主要原因.认为兰州百合长期行无性繁殖引起染色体结构变异,导致减数分裂异常.In this paper,some abnormalities of meiosis of pollen mother cells were studied in Lilium davidii var.unicolor.There were unequal bivalents,homologous chromosome deconjugation,chromosome brige,unequal separation,laggard chromosomes,chromosome outside nucleus,micronuclei and so on.The principles of abnormality and effect on formation of normal microspore were analyzed.The statistic of pollen germination rate showed that abnormal meiosis of pollen mother cells was chief reason which resulted in abortive pollen.We think that asexual propagation lead to variation of chromosome constitution and abnormal meiosis in Lilium davidii var.unicolor.

关 键 词：兰州百合 小孢子母细胞 减数分裂 异常现象 

分 类 号：Q944.4[生物学—植物学]