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综合近半个世纪的研究结果表明，玉米抗旱性是玉米在水分胁迫环境下，体内细胞在结构、生理及生物化学上发生一系列适应性改变后，最终在植株形态和产量上的集中表现。因而在干旱条件下，根冠比、植株高度、叶片大小、叶着生姿态，叶片及叶片的蜡、角质层厚度，雄穗大小和ＡＳＩ等形态特征；叶水势、细胞的渗透调节能力，细胞内ＳＯＤ、ＰＯＤ、ＣＡＴ、ＬＯＸ、ＰＥＰｃａｓｅ和硝酸还原酶活性以及Ｖ一Ｃ、ＧＳＨ和Ｐｒｏ的变化，均可作为玉米抗旱性鉴定的指标。
Based on nearly half a century of research, the results show that drought resistance of maize is a concentrated expression of plant morphology and yield in maize under water stress environment after a series of structural, physiological and biochemical changes occur in maize. Under drought conditions, the root-shoot ratio, plant height, leaf size, leaf stance, wax and cuticle thickness of leaves and leaves, tassel size and ASI morphological characteristics; leaf water potential, cell osmoregulation ability, The activities of SOD, POD, CAT, LOX, PEPcase and nitrate reductase and the changes of V-C, GSH and Pro in maize can all be used as indicators of drought resistance in maize.