草业学报Issue(3)：80-88,9.DOI:10.11686/cyxb20150308
外源甜菜碱对匍匐翦股颖的抗旱性调控作用分析
Regulatory role of exogenous glycine betaine on the drought tolerance of creeping bentgrass
摘要
Abstract
To explore the regulatory role of exogenous glycine betaine (GB)on the growth of creeping bentgrass (Agrostis stolonifera )under drought stress and rehydration,creeping bentgrass sods were transplanted into a greenhouse and grown for 50 days before spraying with GB using 4 different concentrations (0,50,100 and 200 mmol/L).Artificial drought treatment and rehydration were applied 3 days after GB application.Turf quality, relative water content,cell membrane permeability,chlorophyll content,free-proline content,soluble protein content,malondialdehyde (MDA)content,and the activity of antioxidant enzymes;superoxide dismutase (SOD);catalase (CAT);and peroxidase (POD)were measured.The results showed that turf quality,relative water content and chlorophyll content were decreased by drought stress while cell membrane permeability, free-proline content,soluble protein content,MDA content and SOD,CAT,and POD activity were increased. However,application of GB significantly reduced the decline of turf quality,relative water content,and chloro-phyll content under drought stress.Application of GB also increased the free-proline content,soluble protein content,SOD and CAT activity but reduced cell membrane permeability and MDA content compared to the control.Recovery after rehydration was also improved by GB application.The results suggested that exoge-nous GB could enhance the drought tolerance of creeping bentgrass under drought stress and the optimum con-centration was100 mmol/L.关键词
甜菜碱/匍匐翦股颖/干旱胁迫/渗透调节/抗氧化酶Key words
glycine betaine/creeping bentgrass/drought stress/osmotic adjustment/antioxidant enzymes引用本文复制引用
刘思露,杨鹏,尹淑霞..外源甜菜碱对匍匐翦股颖的抗旱性调控作用分析[J].草业学报,2015,(3):80-88,9.基金项目
国家自然科学基金（31302016）和中央高校基本科研业务费专项资金（YX2013-36）资助。 （）
