CHANG Qing-shan,ZHANG Li-xia,ZHENG Yi-qi,et al.Effects of Ca2+?on Seed Germination Characteristics of Medicago sativa Under Salt Stress[J].Northern Horticulture,2014,38(10):64-68.
盐胁迫下钙离子对苜蓿种子萌发的影响
- Title:
- Effects of Ca2+?on Seed Germination Characteristics of Medicago sativa Under Salt Stress
- 文章编号:
- 1001-0009（2014）10-0064-05
- Keywords:
- Medicago sativa; CaCl2 solution; salt stress; seed germination; subordinate function analysis
- 分类号:
- S 551+.703.4
- 文献标志码:
- A
- 摘要:
- 以苜蓿为试材，采用不同浓度CaCl2溶液对苜蓿进行浸种处理，研究了盐胁迫下钙离子对苜蓿种子发芽和生长的影响，以期寻找苜蓿发芽阶段缓解盐胁迫的最佳浸种浓度。结果表明：随着钙溶液处理浓度的升高，盐胁迫下苜蓿种子发芽率、发芽势、发芽指数、活力指数、鲜重、苗高、根长均呈现先增加后下降的趋势；隶属函数综合分析表明，钙溶液浸种对盐胁迫下苜蓿种子发芽能力影响效果由大到小依次为20、40、10、80、5、0 mmol/L，以20 mmol/L的钙溶液浸种处理对提高苜蓿种子发芽阶段抗盐胁迫的效果最佳。
- Abstract:
- The seeds of Medicago sativa pretreated in different CaCl2 solutions was used to study the effect of Ca2＋ on its germination and growth under NaCl stress，which was expected to get the proper method for improving the salt resistance of seeds of Medicago sativa. The results showed that the values of germination rate，germination energy，germination index，vigor index of the seeds，fresh weight，seedling height and root length of the seedlings increased firstly，then declined with an increase of the concentrations of CaCl2 solution.The results from the subordinate function analysis indicated that the order (from strong to weak) of effects promoted by Ca2+was 20,40,10,80,5,0 mmol/L，20 mmol/L CaCl2 solution soaking seeds was the best treatment for Medicago sativa to improve the resistance to salt stress at the germination phase.
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备注/Memo
第一作者简介：常青山（1979-），男，博士，讲师，现主要从事园林植物与草坪学等研究工作。E-mail：mehero2010@126.com.