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小麦（ＴｒｉｔｉｃｕｍａｅｓｔｉｖｕｍＬ．ｃｖ．１１６６）幼苗在不同渗透势的聚乙二醇溶液胁迫下，叶片的相对含水量和水势随渗透势下降递降，膜的相对透性增加，叶绿素和可溶性蛋白含量减少，核酮糖１，５－双磷酸浚化酶／加氧酶活性下降，而乙醇酸氧化酶活性则上升了。渗透胁迫对植物光合作用造成的不良影响，还表现为损害了光合放氧和二氧化碳的交换与代谢过程，其中二氧化碳受到的影响比氧敏感。
Under the stress of polyethylene glycol solution with different osmotic potential, the relative water content and water potential of wheat (Triticum albumum L. cv.1166) decreased with the decrease of osmotic potential, the relative permeability of membrane increased, the content of chlorophyll and soluble protein decreased, The ketose 1,5-bisphosphatidicase / oxygenase activity decreased, while the glycolic acid oxidase activity increased. The adverse effects of osmotic stress on plant photosynthesis are also manifested as impairing the exchange and metabolism of photosynthetic oxygen and carbon dioxide, which are more susceptible to oxygen than oxygen.