小麦品种可溶性糖和保护性酶与抗旱性关系研究  

Study on the relation of soluble sugar,ptotective enzyme and drought resistance in wheat

作　　者：王川[1] 谢惠民[1] 王娜[1] 王宏礼[1] 

机构地区：[1]西北农林科技大学,陕西杨凌712100

出　　处：《干旱地区农业研究》2011年第5期94-99,共6页Agricultural Research in the Arid Areas

基　　金：国家863计划项目(2006AA100201);陕西省13115项目(小麦抗旱育种)

摘　　要：采用旱胁迫和灌水两种处理条件,对21个抗旱性不同的冬小麦品种苗期的可溶性糖、SOD和POD进行测定,并以籽粒产量、抗旱指数为目标性状进行抗旱性相关关系研究。结果表明:同一水分处理下不同品种间的可溶性糖、SOD和POD活性差异较大,抗旱指数高的品种明显高于抗旱指数低的品种;且丰产抗旱性品种的可溶性糖、POD和SOD酶活性大多都能同时达到或高于41.68 mg/g、169.73 U/(g.min FW)和496.33 U/(g.min FW)。相关分析表明:可溶性糖和保护性酶与抗旱指数存在极显著正相关,相关系数为rSS>rPOD>rSOD;通径分析表明:干旱胁迫条件下,可溶性糖对产量的正向作用最大(0.5584),对DI的正向作用也最大(0.5264);胁迫下各生理指标都对产量和抗旱指数起着正向的直接作用。综合分析认为可溶性糖和保护性酶是抗旱小麦较为理想的指标。In order to study the correlation of drough resistance with certain factors under drough-stressed and non-stressed conditions,souble sugar（SS）,SOD and POD of 21 winter wheat varieties at seeding stage were measured,and the grain yield and drought resistance index（DRI） were amalysed as target traits.The results showed that there were great differences in SS,SOD and POD in different cultivars under each treatment;The content of SS,SOD and POD of the most high-yield and drough-resistant wheat varieties reaches 41.68 mg/g,496.3 U/（g·min FW） and 169.73 U/（g·min FW） or even more.The analysis of relativity indicated that SS,SOD and POD were highly correlated with DRI,the correlation ranked as rSSrPODrSOD;The pathway indicated that SS played an important role in the yield and DRI under drought stress;The coefficient of effects was 0.5584 and 0.5264;The SS,SOD and POD played positive direction effect on yield and DRI under drought-stressed conditions.In conclusion,they can be used as indicators to identify drought-resistant varieties.

关 键 词：小麦 可溶性糖 SOD POD 抗旱指数 

分 类 号：S312[农业科学—作物栽培与耕作技术]