土壤干旱和复水对结缕草生理特性的影响  

Effects of Drought Stress and Rewatering on Physiological Characteristic of Zoysia japaonica

作　　者：王微[1] 

机构地区：[1]重庆文理学院生命科学与技术学院,重庆402160

出　　处：《北方园艺》2011年第23期57-60,共4页Northern Horticulture

基　　金：重庆市教育委员会科学技术研究资助项目(KJ081212)

摘　　要：通过对结缕草在土壤干旱及复水过程中叶片相对含水量(RWC)、游离脯氨酸含量(Pro)、叶绿素含量、超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量、可溶性糖(TSC)含量等生理指标的测定,研究土壤干旱对结缕草生理特性的影响。结果表明:干旱胁迫引起结缕草的叶片相对含水量明显下降,游离脯氨酸含量、丙二醛含量及可溶性糖含量均随干旱天数的增加呈持续增加的趋势,而叶绿素含量和SOD酶活性先增后减。复水后各项生理指标除相对含水量、游离脯氨酸含量外均随着复水时间的增加逐渐恢复至对照水平。干旱胁迫下,结缕草水分平衡的保持、SOD酶活性及丙二醛含量的增加以及脯氨酸和可溶性糖等渗透调节物质的积累,是结缕草抗旱的重要生理机制。The effects of drought on the physiological characteristics of Zoysia japonica,the dynamic changes of leaf relative water content（RWC）,content of proline（Pro）,chlorophyll,malondialdehyde（MDA）,total soluble carbohydrates（TSC）and superoxide dismutase（SOD）activity of Zoysia japonica were studied under drought stress and rewatering conditions in this study.The results showed that drought stress caused obvious declines in RWC,but the content of PRO,MDA and TSC were increasd as water stress prolonged,and chlorophyll content and SOD activity increased at first then declined.All physiological indexes,except the contents of leaf relative water and proline,restored to the control check levels after rewatering.In summary,the ability to keep water balance,increased SOD activity,MDA content and accumulation of osmotic adjustment materials（PRO and TSC）could be the physiological mechanism of drought resistance for Zoysia japonica.

关 键 词：结缕草 干旱胁迫 复水 生理特性 

分 类 号：S688.406.1[农业科学—观赏园艺]