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淹水胁迫是玉米生产遭受的主要逆境之一。淹水胁迫使玉米植株气体扩散受阻,叶片细胞膜脂过氧化加剧,MDA含量积累,保护酶系统受损,叶绿体降解,光合速率下降。玉米可通过生理生化机制的调节来适应淹水胁迫,包括玉米植株生长发育、形态结构、解剖结构产生明显变化,在呼吸代谢、光合作用、抗氧化系统和内源激素等方面也发生相应变化。本文从形态学、生理学、生物化学和分子生物学等方面综述玉米耐涝机理研究进展,为玉米耐涝性研究和耐涝玉米新品种选育提供参考。
Flooding stress is one of the major adversities that corn production suffers. Under flooding stress, the gas diffusion in maize plants was blocked, the membrane lipid peroxidation was aggravated, MDA content was accumulated, the protective enzyme system was damaged, chloroplast degradation and photosynthetic rate were decreased. Maize can adapt to the flooding stress through the regulation of physiological and biochemical mechanisms, including the growth and development, morphological structure and anatomical structure of maize plants, and also corresponding changes in respiratory metabolism, photosynthesis, antioxidant system and endogenous hormones. This review summarizes the research progress on the mechanisms of waterlogging resistance in maize from aspects of morphology, physiology, biochemistry and molecular biology, and provides references for the study of waterlogging tolerance and breeding of new varieties of waterlogging tolerant maize.