摘要
目的:比较湖北麦冬和山麦冬花药及花粉发育的差异,探讨湖北麦冬不育的细胞学机理。方法:采用石蜡切片法,对湖北麦冬和山麦冬的花药与花粉发育过程进行了比较研究。结果:山麦冬花药绒毡层为分泌绒毡层,二分体时期开始解体,至花药完全成熟时,绒毡层和中层细胞彻底消失,成熟花粉为3-细胞型。湖北麦冬花药绒毡层在减数分裂早期已大部分解体退化,绒毡层细胞液泡化膨大,单核小孢子败育,花粉粒畸形。结论:绒毡层发育异常和提前退化是湖北麦冬花粉败育的重要原因。
Objective：To Compare the difference of anther and pollen growth between Liriope spicata var. prolifera and L. spicate, and investigate the mechanism of the sterility of Liriope splcata var. prolifera. Methods ： A comparative study on anther and pollen growth process was carried out between L. spicata var. prolifera and L. spicata by means of paraffin section. Results ： In L. spicata, the tapetum was secretory tapetum and began to degrade during dyad stage. The cells of tapetum and middle layer disappeared thoroughly when pollens were fully mature at 3-celled stage. In L. spicata var. prolifera, the degradation of the tapetum took place at the early time of meiosis stage and the tapetum cells inflated like vacuolization. The mononuclear pollens were abortive, which eventually formed abnormal pollens. Conclusion：The pollen abortion of L. spicata var. prolifera is associated with tapetum heteroplasia and degradation in advance.
出处
《中药材》
CAS
CSCD
北大核心
2009年第8期1188-1191,共4页
Journal of Chinese Medicinal Materials
基金
高等学校博士学科点专项科研基金项目(20060487071)
国家"十一五"科技支撑项目(2006BAI06A15-4)
关键词
湖北麦冬
山麦冬
绒毡层
花粉发育
雄性不育
Liriope spicata （ Thunb. ） Lour. vat. prolifera Y. T. Ma
Liriope spicata （ Thunb. ） Lour.
Tapetum
Pollen growth
Male-sterile
