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Position: Home > Articles > Differing Response of Different Cynodon dactylon Varieties under Polyethylene Glycol Stress Northern Horticulture 2008 (9) 101-104

不同狗牙根品种对聚乙二醇胁迫反应的差异

作  者:
易杨杰;张新全;高杨;严欢;初秀娟
单  位:
四川农业大学草业科学系
关键词:
狗牙根;聚乙二醇;相对含水量;游离脯氨酸含量;隶属函数
摘  要:
以聚乙二醇(PEG)作为渗透胁迫剂,对5份狗牙根品种(系)进行干旱胁迫。观测其植株叶片相对含水量、叶绿素总含量、相对电导率、游离脯氨酸含量以及丙二醛含量。随着PEG-6000浓度的提高以及胁迫时间的延长,狗牙根叶片相对含水量和叶绿素总含量呈递减趋势;相对电导率和丙二醛含量呈递增趋势;游离脯氨酸含量则先递增后达到一个峰值,随后稍微有点下降。对5个理化指标的抗旱系数进行隶属函数分析,得出各狗牙根的抗旱性由强到弱的顺序为:Sau02011、Sau9926、南京狗牙根、TifwayS、au9928。
译  名:
Differing Response of Different Cynodon dactylon Varieties under Polyethylene Glycol Stress
作  者:
YI Yang-jie,ZHANG Xin-quan,GAO Yang,YAN Huan,CHU Xiu-juan(Department of Grassland,Sichuan Agricultural University,Ya'an,Sichuan 625014,China)
关键词:
Cynodon dactylon;Polyethylene glycol;Relative water content(RWC);Dissociated praline(Pro);Subordinate function
摘  要:
Five Cynodon dactylon varieties were subjected to drought stress,using polyethylene glycol(PEG) as the stress reagent.Relative water content(RWC)、chlorophyll content、relative conductance rate(RPP)、dissociated praline(Pro) and malondiadehyde(MDA) were analyzed.Along with the enhance of PEG-6000 consistence and prolong the stress time,the RWC and chlorophyll content presented descending;while the RPP and the MDA presented increasing;the Propresented first increasing then descending.The drought coefficients of five physiological parameters were evaluated by subordinate function analysis.The capacity of drought resistance of the five varieties was ordered as follows: Sau02011>Sau9926>Nanjing>Tifway>Sau9928.

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