开花期干旱胁迫对玉米细胞膜透性、抗脱水性和产量的影响

Effect of Drought Stress at Flowering Stage on Transmission of Cell Membrane,Anti-dehydration and Yield of Maize

对95份玉米核心自交系进行了大田正常灌水和干旱胁迫对比试验,重点研究了受旱后玉米自交系开花期的叶片电导率和叶片脱水系数的变化,以及这些变化与抗旱性的关系。结果表明,干旱胁迫区的电导率和脱水系数比正常灌水区的电导率和脱水系数要高。玉米受旱后这两个指标值的增加幅度与抗旱性呈显著负相关。以干旱胁迫区的电导率与正常灌水区的电导率之比、以及干旱胁迫区的脱水系数与正常灌水区的脱水系数之比,作为抗旱性鉴定的复合指标,比直接用干旱区电导率和脱水系数更加有效。

The experiment of 95 sets of maize core inbred strains was conducted in the field under normal irrigation and drought stress to study the change of leaf conductivity and leaf dehydration coefficient at flowering stage after maize suffering from drought and the relation betweent the changes and drought resistance. The experiment results indicated that the conductivity and dehydration in the area of drouaght stress were higher than those in normal irrigation area. The increasing range of those two index values were significantly negative with drought resistance after maize suffering from drought. By comparing conductivity in drought area with that in normal irrigation area and dehydration coefficient in drought stress area with that in normal irrigation area, the complex index of drought resistance identification was more effective than conductivity and dehydration coefficient, which directly came from the drought area.