<正>通过测定践踏胁迫下野生假俭草和结缕草两种草坪草叶片的几项生理指标,探讨在践踏胁迫下植物叶片的超氧化物歧化酶活性、可溶性总糖含量、脯氨酸含量、相对电导率等生理指标的变化特征。结果表明,践踏胁迫下,假俭草和结缕草草层厚度、叶片长度和宽度均比对照有显著的减少;相对电导率、可溶性总糖、脯氨酸含量均显著高于对照;SOD酶活性低于对照。践踏胁迫下两种草比较,假俭草可溶性总糖含量高于结缕草的,脯氨酸含量则低于结缕草的。形态和生理指标的分析表明,假俭草叶片比结缕草叶片耐践踏。

Variation of several physiological indices including the activity of superoxide dismutase(SOD) and peroxidase(POD),content of total soluble sugar,proline accumulation,relative conductivity of native Eremochloa ophiuroides and Zoysia japonica under trample stress was measured.The result showed that:(1)under trample stress,thickness of lawn,leaf length and width decreased dramatically.(2)relative conductivity,content of total soluble sugar and proline accumulation increased,the declined activity of superoxide dismutase(SOD) was found.(3)under trample stress,the content of total soluble sugar,proline accumulation between measured species were E.ophiuroides>Z.japonica.(4)based on the comperehensive analysis of physiological indices,it was concluded that E.ophiuroides was more tolerant to trample stress than Z.japonica.