摘要
植物的根、冠之间除了物质（矿质元素、光合产物等）的交流外，还存在着重要的信息通讯，如化学信号、电信号、水信号等。根、冠之间通过这些信号的交流，协调植物的正常生长。本试验选用2个生育特性不同的短季棉品种，研究了根系伤洗液和叶片中内源激素的动态变化，以此探讨了棉花根-冠之间的关系。结果表明，初花期后，伤流液中几种激素的流量均达到峰值，与地上部鲜重的快速增长和幼铃的发育有关；中棉所20号伤流液中iP＋iPA，IAA，ABA的高峰出现时间早于中棉所16号，与其产量器官发育较早相吻合；中棉所16号伤流液中几种生长促进型激素的含量在开花后高于中棉所20号，另外，其叶片中的Z＋ZR，iP＋iPA含量高于后者，而ABA含量低于后者，决定了它的地上部生长较后者旺盛。文章最后讨论了细胞分裂素不同组分的作用。
The changes of endogenous hormones in root exudates and leaf and the relations of root to stem with two cultivars of short-season cotton (Zhongmiansuo 16 and Zhongmiansou 20) have been studied. The results suggested that: ①After primary flowering, contents of each detected hormones in root exudates were all reached to the peak value, which might have certain correlation with the rapid increase of weight of above-ground part and the development of young bolls．②Compared with Zhongmiansuo 16, the peak value of iP + iPA,IAA, ABA in root exudates of Zhongmiansuo 20 appeared earlier, which is corresponding with its early and rapid growth of boll forming. ③Contents of several growth-promoting hormones in root exudates and the level of Z+ZR, iP+iPA in leaf of Zhongmiansuo 16 were higher than Zhongmiansuo 20 after flowering, causing more vigorous growth of aboveground part than Zhongmiansuo 20. The possible effects of different kinds of CTKs were all dicussed.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
1999年第5期92-97,共6页
Journal of China Agricultural University
基金
国家自然科学基金!59470431
攀登计划!9219-2
农业部重点项目!08-02-02
关键词
短季棉
根系伤流液
叶片
根-冠关系
内源激素
short-season cotton
root exudates
leaf
plant hormones
root-stem relation
