不同浓度聚乙二醇对玉米杂交种幼苗质量及保水性的影响  

Effects of different polyethylene glycol concentrations on seedling quality and water retention of maize hybrid

作　　者：康志钰[1] 王建军[1] 孔繁军 邢吉敏 吴鹏 

机构地区：[1]云南农业大学农学与生物技术学院,云南昆明650201 [2]中国种子集团有限公司,北京100045

出　　处：《华南农业大学学报》2014年第4期31-34,共4页Journal of South China Agricultural University

基　　金：国家科技支撑计划子项目(2011BAD35B08)

摘　　要：【目的】研究玉米苗期抗旱性.【方法】选取7个玉米杂交种,待种子吸胀后,用质量浓度分别为0、100、150和200 g·L-1的聚乙二醇(PEG)进行处理,模拟干旱,测定不同浓度PEG对玉米杂交种幼苗质量及保水性的影响.【结果和结论】PEG浓度是影响玉米杂交种幼苗保水性及幼苗质量的主要因素.随着PEG浓度的提高,玉米杂交种的幼苗长度显著降低,但幼苗质量和保水性显著提高.在较高PEG浓度下,农单5号、长城706和会单4号具有较强的抗旱性,海禾1号、农单5号和长城706具有较高的幼苗质量,即农单5号和长城706对较高浓度PEG具有较高的耐受能力.考查植物抗旱性时,不仅需要考查幼苗外观长势,还需考查幼苗质量及保水性.Objective] To study the drought resistance of maize during the seedling stage .[Method]Seven maize hybrids were selected to test the effects of polyethylene glycol （ PEG ） concentrations on seedling quality and water retention of maize hybrid , with the PEG concentrations of 0 （CK）, 100, 150 and 200 g· L^-1 , under simulated drought condition , after the seeds imbibed .[Result and conclusion]The results indicated that PEG concentration was the most important factor to affect seedling quality and water retention of maize hybrid .With the increase of PEG concentration , seedling length of maize hybrid reduced significantly , while seedling quality and water retention increased significantly .Nongdan No .5 , Changcheng 706 and Huidan No.4 had strong drought resistance .Haihe No.1, Nongdan No.5 and Changcheng 706 had good seedling quality , so Nongdan No .5 and Changcheng 706 had the resistance to high PEG concentration .To study the drought resistance of plant , not only the seedling appearance , but also the seedling quality and water retention should be examined .

关 键 词：玉米杂交种 聚乙二醇(PEG) 抗旱性 幼苗质量 保水性 

分 类 号：S336[农业科学—作物遗传育种]