不同化感效应的小麦根系分泌物对黄瓜幼苗生长及根系生理生化特性的影响

以黄瓜幼苗为受体，研究了不同化感效应的小麦根系分泌物对黄瓜幼苗生长及根系生理生化特性的影响。结果表明：具有化感促进效应的小麦根系分泌物分别在处理后的不同时期提高了黄瓜幼苗根系保护酶活性、渗透调节物质含量，降低了脂膜过氧化作用，提高了黄瓜幼苗的株高、茎粗、全株干质量、叶面积及光合作用|具有化感抑制效应的小麦根系分泌物则在处理后的不同时期降低了黄瓜幼苗保护酶活性及渗透调节物质含量，增加了脂膜过氧化作用，抑制了黄瓜幼苗的生长，降低了光合作用。

Effects of Root Aqueous Extracts of Wheat Cultivars with Different Allelopathy Potential on Cucumber Seedlings Growth and Physiological and Biochemical Characters of Cucumber Root

With cucumber(Cucumis sativus L.)seedling as receptors,this paper studied the effect of different allelopathic aqueous extracts of wheat root on cucumber seedling growth,the physiology and biochemical characters of cucumber roots.The results indicated that the stimulated aqueous extracts of wheat root can improve the activities of protective enzymes and the content of osmoregulation substance,reduce the membrane lipid peroxidation of cucumber roots in different periods after treatment,and increase plant height,stem diameter,dry weight in whole plant,leaves area,and photosynthesis of cucumber seedling.The suppressive aqueous extracts of wheat root can reduce the activities of protective enzymes and the content of osmoregulation substance,increase the membrane lipid peroxidation of cucumber roots in different periods after treatment,and also inhibit the growth of cucumber seedlings.