摘要
[目的]揭示过量Mg2+对玉米和大豆萌发特性的影响。[方法]设0、40、80、120、160、200、240、280、320、360、400 mmol/L11个Mg2+浓度处理,研究不同处理对玉米和大豆发芽势、发芽率、鲜重、干重、根长、株高、茎粗等指标的影响。[结果]随着Mg2+浓度的升高,玉米的发芽被延缓,而大豆发芽率降低明显,达到0.05水平的显著性差异。随着Mg2+浓度升高,玉米和大豆的鲜重和干重降低,但均表现出一定的适应性。玉米和大豆幼根和幼苗生长受Mg2+抑制明显,普遍表现出萎缩、发育不良现象。[结论]过量Mg2+胁迫对不同农作物的发芽势、发芽率影响不同,对农作物的根、茎器官生长毒害作用明显。
[Objective] The research aims to reveal the effects 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 langth,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 significant difference at 0.05 level. When Mg^2＋ concentration increased, the fresh weight and dry weight of maize and soybean decreased,but they both 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 lass different effects on the germination potential and germination rate of different crops and has obvions poisoning effects on the root and stem growth of crops.
出处
《安徽农业科学》
CAS
北大核心
2008年第24期10411-10412,共2页
Journal of Anhui Agricultural Sciences
基金
中国科学院东北振兴科技行动计划重点项目(DB2X-2-027)资助
国家重点基础研究发展计划(2004CB418506)
关键词
镁胁迫
玉米
大豆
种子
萌发
Mg stress
Maize
Soybean
Seeds
Germination
