草业学报Issue(2)：205-215,11.DOI:10.11686/cyxb2015133
低温胁迫对狗牙根激素和碳水化合物代谢的影响
Effect of low temperature on phytohormones and carbohydrates metabolism in Ber-muda grass
摘要
Abstract
To investigate the effects of modulated cold acclimation on the leaf membrane stability,chlorophyll content,endogenous hormones (ABA,IAA,GA3 ,tZR),and carbohydrate (soluble sugars,starch,fructan, total nonstructural carbohydrates)metabolism,five Bermuda grass cultivars,Tifway,Tifgreen,Tifsport, Tifeagle and Baoding were selected and treated under a range of temperatures:optimum (30℃/25℃),subopti-mum (18℃/12℃),chilling (8℃/4℃)and freezing (4℃/-4℃)in growth chambers.The results demonstra-ted that leaf electrolyte leakage,abscisic acid (ABA)content and carbohydrates (soluble sugars,starch,fruc-tan,total nonstructural carbohydrates )increased while chlorophyll content,endogenous hormones auxin (IAA),gibberellin (GA3 )and cytokinin (tZR)content decreased with low temperature stress,but the changesvaried with cultivar.Tifeagle,Tifsport and Tifgreen were ranked highest,Tifway was ranked intermediate while Baoding ranked lowest.Accumulating or maintaining relatively higher levels of phytohormones and car-bohydrates,associated with cellular osmotic homeostasis and membrane stability,delayed leaf senescence. Cold resistance genes or protein induction may contribute to the higher cold tolerance in Bermuda grass under low temperature.关键词
狗牙根/品种/低温胁迫/内源激素/碳水化合物Key words
bermudagrass (Cynodon dactylon )/cultivars/low temperature stress/endogenous hormone/car-bohydrates引用本文复制引用
杨勇,娄燕宏,杨知建,向佐湘,徐庆国,胡龙兴..低温胁迫对狗牙根激素和碳水化合物代谢的影响[J].草业学报,2016,(2):205-215,11.基金项目
长沙市科技局项目（K1403026-31），国家教育部“创新团队发展计划”（IRT1239）和湖南省教育厅项目（KC2011B023）资助。 （）
