摘要
利用石蜡切片对葱属植物山韭(AlliumsenescensL.)的小孢子发生及雄配子体形成进行了研究。结果表明:山韭花药具4个药室,花药壁由表皮、药室内壁、中层和绒毡层4层细胞组成,属分泌型绒毡层。小孢子母细胞减数分裂的胞质分裂为连续型。成熟花粉为二胞型,偶见三胞型。在小孢子母细胞减数分裂和单核小孢子中出现许多异常行为,如染色体拖曳,落后染色体和后期桥,以及产生微核等,这可能是导致花粉败育的原因之一。
The microsporogenesis and development of male gametophyte of Allium senescens L. were studied using method of paraffin section. The anther was found to be 4-sporangiate. The anther wall includes 4 layers： epiderm, endothecium, middle layer and secretory tapetum. Successive cytokinesis in the microspore mother cells （MMCs） follows meiosis. Most mature pollen grains are 2-celled type, rarely 3-celled type. In addition, there are some abnormal phenomena at meiosis of MMCs and uninucleate microspores, including laggard chromosome, chromosome fragments, bridges, double-bridges, micronuclei and so on. These abnormal phenomena is one reason which resulted in abortive pollen.
出处
《热带亚热带植物学报》
CAS
CSCD
北大核心
2008年第2期153-159,共7页
Journal of Tropical and Subtropical Botany
基金
国家自然科学基金项目(No.30470106)资助
关键词
山韭
小孢子
花粉
减数分裂
异常行为
Allium senescens L.
Microspore
Pollen
Meiosis
Abnormality
