淹水胁迫萌发对玉米幼苗生长的影响及耐淹性的评价.pdf

安徽农业科学 , Journal of Anhu i A gri. Sci. 2010 , 38 ( 9) : 4464 - 4465 责任编辑 　刘月娟 　责任校对 　卢瑶 淹水胁迫萌发对玉米幼苗生长的影响及耐淹性的评价 1, 2 1 1 1 郭九信 ,周 毅 ,范东坡 ,郑坎坎 　 ( 1. 安徽科技学院农业资源信息所 ,安徽凤阳 233 100; 2. 南京农业大学资源与环境科学学院 ,江苏南京 2 10095) 摘要　[ 目的 ]快速筛选具有抗淹水胁迫能力的玉米品种 。[方法 ]以 16个玉米品种作为供试材料 ,采用淹水胁迫萌发试验评价不同品 种玉米种子的发芽率、苗期不同部位生物量及其与品种耐淹性的关系。[结果 ]不同品种玉米的发芽势、发芽率在淹水胁迫条件下明显 降低 ,并且玉米幼苗不同部位的生物量、根冠比明显下降,不同品种之间存在明显的基因型差异 。对生物量、发芽率和根冠比胁迫系数 进行相关性分析 ,发现只有发芽率胁迫系数与幼苗生物量胁迫系数呈正相关; 同时,具有高发芽率与生物量胁迫系数的玉米品种在苗期 表现出相对较强的耐淹生物学性状 。[结论 ]依据淹水胁迫条件下的发芽率 ,可以对不同玉米品种苗期的耐淹水胁迫能力或淹水萌发后 恢复生长的能力做出评价 。 关键词　淹水胁迫萌发;玉米 ;耐淹性 ( ) 中图分类号　S513　　文献标识码　A　　文章编号　0517 - 6611 2010 09 - 04464 - 02 Effect of W aterlogg ing Stress Germ ination on Growth of M a ize Cultivars and A ssessm ent on W aterlogging Tolerance at Seedling Stage GUO J iux in et a l　 ( In stitute of A gricu ltural Resources Inform ation, Anhu i Science and Technology University, Fengyang, Anhui 233100) Abstract 　[Objective ] The aim was to select m aize cu ltivars w ith h igher waterlogging tolerance effectively. [Method ] The relation ship among germ ination p ercentage, b iom ass of different p arts and waterlogging tolerance of 16 m aize cu ltivars at seedling stage was investigated u sing germ i nation exp erim ent. [Resu lt ] W aterlogging stress sign ificantly reduced germ ination potential, germ ination p ercentage, biom ass of different p arts of m aize seedling, and there was obviou s difference among different genotyp es. Furthermore, there was clo sely po sitive correlation between stress coefficient of germ ination p ercentage and total p lant b iom ass, wh ile no sign ificant correlation existed between stress coefficient of germ ination p er centage and the ratio of roots to shoot, neither did total p lant b iom ass and