Effects of Excessive Mg2+ on the Germination Characteristics of Crop Seeds  

过量Mg2+对农作物种子萌发特性的影响（英文）

作　　者：马恩[1,2] 付莎莎[2] 张宏波[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]中国科学院沈阳应用生态研究所,辽宁沈阳110016

出　　处：《Agricultural Science & Technology》2008年第2期26-29,共4页农业科学与技术（英文版）

基　　金：Key Project of‘Rejuvenating the Northeast China’ Science and Technology Action Plan of Chinese Academy of Sciences(DB2X-2-027);National Key Basic Research Program(2004CB418506)~~

摘　　要：[ Objective ] The research aimed to reveal theeffects of excessive Mg^2＋ on the germination characteristics of maize and soybean. [ Method ] Eleven concentration gradients of Mg^2＋ including 0, 40, 80, 120, 160,200,240,280,320,360 and 400 mmol/L were set up to study the effects of different treatments on such indices as the germination potential, germination rate, fresh weight, dry weight, root length, plant height and stem diameter of maize and soybean. [ Result] With the increasing of Mg^2＋ concentration, the germination of maize delayed and the germination rate of soybean obviously decreased, reaching the significant difference at 0.05 level. When Mg^2＋ concentration increased, the fresh weight and dry weight of maize and soybean decreased, but maize and soybean showed some adaptability. The growth of radicles and seedlings in maize and soybean were obviously inhibited by Mg^2＋ , and atrophy and dysplasia phenomena appeared. [ Conclusion] Excessive Mg^2＋ stress has different effects on the germination potential and germination rate of different crops and has obvious poisoning effects on the root and stem growth of crops.以MgCl2溶液考察Mg^2＋对玉米、大豆种子的萌发及生长的影响，为进一步研究镁粉尘的污染机理、生物响应和污染等级划分提供依据。

关 键 词：Mg^2＋ stress MAIZE SOYBEAN SEEDS GERMINATION 

分 类 号：S330.2[农业科学—作物遗传育种]