水分胁迫对不同产地板蓝根幼苗抗氧化物酶活性和根系活力的影响  

Effect of Water Stress on the Anti-oxidative Enzyme Activity and Root Vigor of Isatis indigotica Root in Different Regions in Seeding

作　　者：谭勇[1] 梁宗锁[1] 董娟娥[2] 赵志新[2] 

机构地区：[1]中国科学院水土保持与生态环境研究中心,陕西杨凌712100 [2]西北农林科技大学,陕西杨凌712100

出　　处：《华北农学报》2006年第5期20-23,共4页Acta Agriculturae Boreali-Sinica

基　　金：陕西省"十五"科技攻关项目(2001KG01-G15-03);中科麦迪森天然药业有限公司中药现代化项目

摘　　要：运用聚乙二醇(PEG6000)模拟水分胁迫的方法,测定水分胁迫下3个不同产地板蓝根幼苗叶片抗氧化物酶活性和根系活力的生理指标,以期确定3个不同产地板蓝根对水分胁迫的响应。结果表明,-0.4 Mp胁迫条件下,SOD,CAT和POD活性和根系活力变化比-0.2 Mpa条件下更剧烈,从水分胁迫初期到中期,保护酶SOD,CAT和POD活性逐渐上升,在胁迫后期保护酶活性逐步下降。随着水分胁迫程度的增加和时间的延长,幼苗根系活力逐步降低。对水分胁迫忍耐较强的品种是安徽板蓝根,其次是山西和陕西板蓝根。In order to determine the effect of water stress by PEG on three varieties of lsatis indigotica from different regions, the activity of anti-oxidative enzymes of seedling leaves and root vigor were assessed by measuring physiological characters. The results showed that physiological and biochemical indexes of root changed greatly under - 0.4 Mp of PEG. The activities of anti-oxidative enzymes including SOD, CAT and POD increased in early and middle stage of water stress, and decreased in final period. The root vigor decreased with the increase of degree and time of water stress. The drought tolerance of the variety from Anhui province was better than that from Shanxi Province and Shaanxi Province.

关 键 词：水分胁迫 板蓝根 幼苗 生理生化指标 根系活力 

分 类 号：S567[农业科学—中草药栽培]