大豆科学2011，Vol.30Issue(3)：405-412,8.
干旱胁迫对不同生育阶段大豆产量形态建成的影响
Drought Stress Influence Soybean Yield Morphogenesis in Different Growth Stages
摘要
Abstract
Seasonal drought is a main environmental factor limited soybean yield in northeast China. Our objective was to determine how drought stress imposed on soybean [ Glycine max ( L. ) Merr. ］ at various growth stages affected plant characteristics. Twelve soybean cultivars were grown under greenhouse conditions and subjected to normal water supply ( 17％ - 18％ soil-available water) and drought stress ( 8％ - 9％ soil-available water) during seedling ( V1 - V5 ), flowering ( R1 - R4) and seed filling (R5 -R8 ) stages. Root morphological traits including length, diameter, volume and surface area were all promoted by stress during seedling, while were inhibited by stress in other periods. Dry matter accumulation was decreased and root/shoot ratio was increased by stress in all tested periods. Drought stress at three periods all declined photosynthetic rate(Pn) , and stress at flowering and seed-filling declined intercellular CO2 concentration(Ci) , transpiration rate(Tr) and stomatal conductance (Cond). The decrease of seed yield caused by stress varied with varieties significantly. The performance of drought tolerance varied with growth periods, only a few cultivars showed resistant to drought stress at all growth stages.关键词
大豆/干旱胁迫/产量Key words
Soybean/ Drought stress/ Yield分类
农业科技引用本文复制引用
刘丽君,林浩,唐晓飞,蒲国峰..干旱胁迫对不同生育阶段大豆产量形态建成的影响[J].大豆科学,2011,30(3):405-412,8.基金项目
国家科技支撑计划资助项目(2009BADA8B02) （2009BADA8B02）
大豆产业技术体系资助项目. （）
