不同狗牙根品种对聚乙二醇胁迫反应的差异  

Differing Response of Different Cynodon dactylon Varieties under Polyethylene Glycol Stress

作　　者：易杨杰[1] 张新全[1] 高杨[1] 严欢[1] 初秀娟[1] 

机构地区：[1]四川农业大学革业科学系,四川雅安625014

出　　处：《北方园艺》2008年第9期96-99,共4页Northern Horticulture

基　　金：科技部“973”资助项目(2007CB108907);四川省青年基金资助项目(07ZQ026-121)

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。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.

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 

分 类 号：S688.4[农业科学—观赏园艺]