作　　者： ; ; (李小湘）;

机构地区： 湖南城市学院建筑与城市规划学院

出　　处： 《农业现代化研究》 2012年第2期245-248,共4页

摘　　要： 利用6个抗性不同的水稻品种为材料,研究渗透胁迫下水稻芽期形态和生理指标的变化。结果表明:水稻胚芽鞘、胚根长度和超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性、还原型谷胱甘肽(GSH)、维生素C(Vc)、脯氨酸(Pro)、丙二醛(MDA)以及亚精胺(Spd)、精胺(Spm)含量等11项与抗旱性有关的形态和生理指标的相对值与抗旱系数相关显著或极显著,可作为水稻芽期抗旱性的评价指标。通过主成分分析确立了Vc、GSH和Spm含量的相对值为水稻芽期抗旱性的综合指标,以抗旱系数为因变量,3个综合指标为自变量建立的回归方程对供试品种的抗旱性进行预测效果较好。 6 rice cultivars with different drought tolerance were used to study the changes of morphological and physiological indexes of rice during germinating stage under osmotic stress. The results showed the drought-resistant coefficient was significantly （or very significantly） correlated with the relative length ofcoleoptiles and radicles, relative activities of superoxide dismutase （SOD）, catalase （CAT）, peroxidase （POD） and relative contents of reduced glutathione （GSH）, proline （Pro）, vitamin C （Vc）, rnalondialdehyde （MDA）, spermidine （Spd） and spermine （Spm）, which therefore could be used as the evaluation indexes of drought tolerance at germinating stage. The integrated drought resistance indexes including the relative contents of Vc, GSH and Spm were established by principal components analysis. The drought resistance of 6 rice cultivars was evaluated by regression equation and was basically consistent with the results from paddy field, proving it is effective to predict the drought resistance during germinating stage in rice using the integrated identification index screened out in this study.

关 键 词： 水稻 芽期 抗旱性指标 渗透胁迫

领　　域： [农业科学] [农业科学] [农业科学]