玉米植株叶片和根系的抗旱性差异分析  

Difference in drought resistance of root and leaf in maize

作　　者：刘胜群[1] 宋凤斌[1] 周璇[1,2] 

机构地区：[1]中国科学院东北地理与农业生态研究所,吉林长春130012 [2]中国科学院研究生院,北京100039

出　　处：《干旱地区农业研究》2010年第4期54-58,共5页Agricultural Research in the Arid Areas

基　　金：国家"863计划"项目(2006AA10Z227);吉林省科技发展计划(20090166);中国科学院东北地理与农业生态研究所博士青年基金项目

摘　　要：为了研究玉米(Zea mays L.)的叶片和根系抗旱性差异,以田间种植的玉米品种‘掖单13’和‘丹玉13’为材料,在拔节期取样,分别对玉米的叶片、叶鞘及初生根、第1层至第5层次生根的基部、中部和根尖的保水能力进行了研究。结果显示,拔节期玉米不同器官保水能力不同,叶鞘的保水能力最强,其次是根系,叶片的保水能力最弱。初生根和各层次生根不同部位相比较,根基部保水能力最强,其次是根中部,根尖的保水能力最弱;不同类型根保水能力相比较,初生根基部、中部和根尖部分的保水能力均最弱;第1层至第5层次生根基部的保水能力是根系发生时间越晚,其保水能力越强;根中部和根尖的保水能力在第1层至第5层次生根中有不同表现。In order to study different drought resistance of root and leaf in maize,water retention ability of leaf,leaf sheath and root at jointing stage of maize（Zea mays L.） two varieties of Yedan 13 and Danyu 13 were examined in field trails.Leaf and sheath of the lower sixth leaf,seminal root and adventitious nodal roots from first layer to fifth layer were used as the test materials.Root was sampled by mining method.The results showed that the water retention ability of different organs were different at jointing stage.From strong to low water retention ability was leaf sheath,root and leaf.To compare water retention ability of different parts of root,from strong to low were base part,middle part and root tip;while to compare that of different root types,water retention ability of seminal root was the weakest.The water retention ability of base part of adventitious nodal roots,from strong to low was the fifth layer,the fourth layer,the third layer,the second layer and the first layer.Water retention ability of middle part and root tip among adventitious nodal roots from first layer to fifth layer showed different.

关 键 词：玉米 叶鞘 初生根 次生根 保水 

分 类 号：S513.01[农业科学—作物学]