Effect of Osmotic Stress with PEG6000 on Osmotic Adjustment Solute in Seedling Leaves of Chenopodium album L.  

PEG6000渗透胁迫对藜幼苗叶片渗透调节物质的影响(英文)

作　　者：孙存华[1] 李扬[1] 贺鸿雁[1] 杜伟[1] 金会丽[1] 王东升[1] 陈湘玲[1] 徐新娜[1] 

机构地区：[1]徐州师范大学生命科学学院

出　　处：《Agricultural Science & Technology》2007年第3期20-24,共5页农业科学与技术（英文版）

基　　金：Supported by the Natural Science Foundation of Education Department of Jiangsu Province(02KJD18007);the Key Laboratory Program of Bio-re-sources of Jiangsu Province(KJS03042);the Key Program of Natural Science Foundation of Xuzhou Normal University(06XLA11)~~

摘　　要：[ Objective] The purpose was to discuss drought resistance mechanism of Chenopodium album L. and supply theoretical basis and practical guidance for artificial cultivation and popularization of C. album. [ Method] C. album seedlings grown to 6th leaf stage were conducted osmotic stress treatment with PEG6000 osmotic whose concentration was set up as 0, 5%, 10% and 20% and the various physiological indices of the 3rd -5th function leaves in upper plant were determined after being treated for 0, 1,3, 5, 7 and 9 d. [ Result] Under osmotic stress with 5% PGE, the relative water content （RWC） of C. album reduced less. Under osmotic stress with 10%, the RWC in seedling leaves of C. album decreased to 62% on the fifth day and the leaves began to wither. Under osmotic stress with 20%, the RWC in seedling leaves of C. album decreased to 61.9% on the third day and the leaves appeared withering, and the RWC decreased to 48.6% on the 7th day and the leaves were dry and yellow. Proline contents in seedling leaves of C. album under osmotic stress with 5%, 10% and 20% PEG were 7.64, 10.9 and 29.4 times of CK on the 7th day. [ Conclusion] C. album hed some adaptability to moderate osmotic stress, but the PEG osmotic stress with high concentration and long time might lead to severe damage on C. album.[Objective] The purpose was to discuss drought resistance mechanism of Chenopodium album L.and supply theoretical basis and practical guidance for artificial cultivation and popularization of C.album.[Method] C.album seedlings grown to 6th leaf stage were conducted osmotic stress treatment with PEG6000 osmotic whose concentration was set up as 0,5%,10% and 20% and the various physiological indices of the 3rd-5th function leaves in upper plant were determined after being treated for 0,1,3,5,7 and 9 d.[Result] Under osmotic stress with 5% PGE,the relative water content(RWC)of C.album reduced less.Under osmotic stress with 10%,the RWC in seedling leaves of C.album decreased to 62% on the fifth day and the leaves began to wither.Under osmotic stress with 20%,the RWC in seedling leaves of C.album decreased to 61.9% on the third day and the leaves appeared withering,and the RWC decreased to 48.6% on the 7th day and the leaves were dry and yellow.Proline contents in seedling leaves of C.album under osmotic stress with 5%,10% and 20% PEG were 7.64,10.9 and 29.4 times of CK on the 7th day.[Conclusion] C.album had some adaptability to moderate osmotic stress,but the PEG osmotic stress with high concentration and long time might lead to severe damage on C.album.

关 键 词：Chenopodium album L. PEG Osmotic stress Osmotic adjustment solute 

分 类 号：S793.9[农业科学—林木遗传育种]