干旱地区农业研究2011，Vol.29Issue(2)：164-167,179,5.
不同程度干旱胁迫对油菜种子萌发及幼苗生长特性的影响
Effect of different degree of drought stress on germination and seedling growth of rapeseed( Brassica napus L.)
摘要
Abstract
Under drought stress simulated by different concentrations of PEG 6000, the rate of germination and e mergence were both reduced in each osmotic potential, but the final germination percentage was not affected. The germi nation percentage was reduced by 3.9％ ～ 86.9％ compared to the control with the decrease of osmotic potential at -0.5 ～ - 1.0 MPa, and there was no emergence at -0.6～ - 1.0 MPa. On the 7th day, ungerminated seeds of each treament were transferred to the distilled water, the germination percentage reached 97.3％ ～ 98.3％, and the difference was not significant compared to the control. Drought stress reduced seed vigor, mean germination time (MGT) increased by 0.1 ～ 1.5 d, germination index (GI) deceased by 2.9％ ～ 96.45％, and seedling vigor index(SVI) (during -0.1 ～ -0.5 MPa) deceased by 5.0％ ～ 23.8％. Drought stress reduced shoot and root length, while the shoot length de creased more than root length, root/shoot ratio was highly increased with osmotic decreasing.关键词
油菜/干旱胁迫/种子萌发/幼苗生长分类
农业科技引用本文复制引用
张静,崔颖,孙尧,颜梅,胡立勇..不同程度干旱胁迫对油菜种子萌发及幼苗生长特性的影响[J].干旱地区农业研究,2011,29(2):164-167,179,5.基金项目
国家科技支撑计划项目(2006BAD21B03,2009BADA8B01) （2006BAD21B03,2009BADA8B01）
湖北省农业科技创新岗位项目 （）
