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以玉米 1 7个自交系和 1 0个杂交种为试材 ,在田间条件下研究了不同光强、不同叶位、不同生育期、不同源库比例和株间差异状态下的气孔阻力及其与光合 (PH)、蒸腾(TR)和叶片水分利用效率 (WUE)的关系 ,结果表明 ,不同自交系之间RS具有显著的差异 ,相差最大可达 2 .3倍以上 ;光照条件变弱、穗叶位差增加、生育期推延和源 /库比例改变等均可引起RS值的增加 ;在各种情况下导致RS变化的同时也引起TR和PH产生相应的变化 ,RS与TR、PH表现出显著或极显著的负相关 ,且相关系数rRS TR>rRS PH;RS与WUE的相关关系在不同的条件下表现出不稳定性
Seventeen inbred lines of maize and 10 hybrids were used as materials to study the stomatal resistance under different light intensities, different leaf positions, different growth stages, different source-sink ratios, The results showed that there was a significant difference in RS among different inbred lines, with the maximum difference of 2.3 times or more. The change of illumination conditions (WUE) and photosynthesis (PH), transpiration (TR) and leaf water use efficiency The increase of RS, the change of RS, the change of TR and PH, RS and TR, PH showed significant or extremely significant negative correlation with correlation coefficient rRS TR> rRS PH; the correlation between RS and WUE showed instability under different conditions