模拟践踏下草地早熟禾分蘖与抗氧化物酶系统  

Effects of trample stress on tillering dynamics and antioxidant enzyme system of Kentucky bluegrass

作　　者：郑扬帆[1] 奇凤[1] 宋桂龙[1] 

机构地区：[1]北京林业大学草坪研究所,北京100083

出　　处：《草业科学》2014年第5期858-862,共5页Pratacultural Science

基　　金：京承高速公路(沙峪沟-市界段)边坡综合防护及治理技术研究;国家林业局林业科学技术推广项目"裸露坡面植被恢复综合技术示范推广"(201131)

摘　　要：本研究以草地早熟禾(Poa pratensis)为试验材料,研究不同梯度践踏处理后草地早熟禾分蘖数和抗氧化酶系统的变化,并对两者进行相关性分析,探讨草地早熟禾分蘖数和抗氧化酶在不同践踏处理下的变化及践踏对草坪草分蘖生长的影响及生理调控。结果表明,践踏后草地早熟禾分蘖由过氧化氢(H2O2)、过氧化物酶(POD)和超氧化物歧化酶(SOD)共同作用,随H2O2含量升高,POD活性增加,SOD活性降低,草地早熟禾分蘖数减少。This research studied the variations of tillers number and antioxidant enzyme system of Kentucky bluegrass （Poa pratensis） under different trample stress and analyzed the correlation between these two indexes under different trample and the effects of trample stress on turfgrass tillering and physiological regulation. The results showed that the tillers of Kentucky bluegrass under trample may be controlled by the coordination functions of H2O2, peroxidase （POD） and superoxide dismutase （SOD）. With the increase of the H2O2, content of the increase of POD activity and the decrease of SOD activity, the number of tillers of Kentucky bluegrass decreased.

关 键 词：草地早熟禾 践踏处理 分蘖数 H2O2含量 POD活性 SOD活性 

分 类 号：S688.4[农业科学—观赏园艺]