摘要
从黄精(Polygonatum sibiricum Red.)种子的形态、解剖结构、果实及种子部分抑制物质的生物测定和种子成熟过程中内源激素ABA含量的变化等方面研究种子的休眠特性。结果表明:黄精种子休眠属于综合休眠,首先黄精种子秋季采收后其种胚存在生理后熟,是导致黄精种子深休眠的主要原因;其次黄精种子的胚乳细胞小、细胞质浓厚、排列致密,胞间隙小,影响物质的共质体运输;果实及种子中含有不同程度的发芽抑制物质;种子成熟时ABA含量升高是导致种子休眠的又一原因。
The seed dormant characteristics of Polygonatum sibiricum Red.were studied in the aspects of seed morphology,anatomical structure,bioassay of some inhibitors in fruits and seeds,and the changes of endogenous hormones ABA content during seed ripening as well.The results showed that the seed dormancy was comprehensive.First,physiological past-ripening was the main reason for seed dormancy after autumn harvesting;Second,the symplast transportation was limited because of endosperm cell with small size,thick cytoplasm,close arrangement with tiny intercellular space;Third,germination inhibitors existed in fruits and seeds;Finally,the increase of ABA content at maturity also caused the seed dormancy.
出处
《植物研究》
CAS
CSCD
北大核心
2010年第6期753-757,共5页
Bulletin of Botanical Research
基金
黄精GAP基地建设项目(2008BC-01)
关键词
黄精
种子
休眠特性
Polygonatum sibiricum Red.； seed； dormant characteristic；
