摘要： 在田间条件下，研究了生产上广泛应用的17个玉米自交系的气孔阻力（RS）及其与光合速率（PH）、蒸腾速率（TR）的关系。主要结果是：（1）不同自交系之间RS具有显着的差异，相差最大可达2.3倍以上；（2）RS随生育进程的推延而增大；（3）RS同PH、TR及WUE（叶片水分利用率）在玉米生长的主要阶段存在极显着的指数函数关系，而在某一特定的生育期则表现出极显着的直线关系；（4）RS与PH、TR、WUE及R（呼吸速率）的相关度从大到小依次是TR>PH>WUE>R;（5）气孔阻力值拟可作为不同基因型的重要生理学特征之一。

关键词: 玉米, 基因型, 气孔阻力, 光合速率, 蒸腾速率, 叶片水分利用率

Abstract: Seventeen inbred lines of maize which have been applied widely in practice were used to study RS and the relationships between PH,TR and RS in field conditions. The results showed:(1)the values of RS was significantly different among inbred lines;(2)the relationships between PH,TR,WUE and RS could be simulated as y=ae^bxduring main growth stages and as y=a+bx in a special stage; (3)the correlative degree:r^RS-TR>r^RS-PH>r^RS-WUE>r^RS-R;(4) stomatal resistance might be regarded as a important characteristic of maize genotypes.

Key words: Maize, Genotypes, Stomatal resistance, Photosynthesis, Transpiration, Water use efficency in leaf

中图分类号: 

• S513.01