Gibberellic acid and kinetin partially reverse the effect of water stress on germination and seedling growth in chickpea

被引：0
作者：
Satvir Kaur
Anil K. Gupta
Narinder Kaur
机构：
[1] Punjab Agricultural University,Department of Biochemistry
来源：
Plant Growth Regulation | 1998年 / 25卷
关键词：
germination; water stress; gibberellic acid; kinetin; indole acetic acid; amylase activity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The percent germination and seedling growth of chickpea (Cicer arietinum L. cv. PBG-1) decreased with increasing concentrations of exogenous polyethylene glycol 6000 (PEG). With 15% PEG in the growth medium germination was only 33% while with 10% PEG it was 58% as compared to 93% in control. Addition of gibberellic acid (GA3) and kinetin to medium containing 10% PEG increased the germination and seedling growth and the effect was maximum with 6 µM GA3 which was a better inducer of growth and germination under reduced water potential than kinetin. However, indole acetic acid (IAA) inhibited germination and growth of stressed seedlings. The activity of amylase in cotyledons under stress was significantly increased with GA3 while kinetin and IAA were less effective. Gibberellic acid also enhanced the mobilization of starch from cotyledons of stressed seedlings resulting in low starch levels in cotyledons compared with stressed seedlings.
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页码：29 / 33
页数：4
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