摘要
以高羊茅(Festuca arundinacea)为材料,采用不同浓度CaCl2溶液对高羊茅进行浸种处理,测定模拟酸雨胁迫下高羊茅种子发芽和生长的影响,旨在寻找高羊茅发芽阶段抗酸雨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,模拟酸雨胁迫下高羊茅种子发芽率、发芽势、发芽指数、活力指数、苗高、根长、鲜质量均呈先增加后下降的趋势,幼苗的电导率则呈先下降后上升的趋势。主成分分析与隶属函数综合分析表明,钙溶液浸种对模拟酸雨胁迫下高羊茅种子发芽能力影响效果由大到小依次为50、25、10、100、5、0 mmol.L-1,以50mmol.L-1的钙溶液浸种处理对提高高羊茅种子发芽阶段抗酸雨胁迫的效果最佳。
In order to find the optimum CaCl2 concentration and study effects of CaCl2 on seed germination characteristics under simulated acid rain stress, Festuca arundinacea seeds were treated with different concentration CaCl2 solutions and the related germination indexes were measured after seed soaking. The results indicated that seed germination percentage, germination energy, germination index, vigor index, seedling height, root length and seedling fresh weight increased firstly, and then declined with increaseing CaCl2 concentrations continually, while electrical conductivity of seedlings was oppsite, declined firstly and then increased. The results obtained from the comprehensive evaluation of principal component and subordinate function analysis showed that the order （from strong to weak） of effects promoted by Ca^2＋ was 50, 25, 10, 100, 5 and 0 mmol·L^-1. The 50 mmol·L^-1 CaCl2 solution soaking seeds was the best for F. arundinacea to improve the resistance to acid rain at the germination phase.
出处
《草业科学》
CAS
CSCD
北大核心
2012年第12期1903-1909,共7页
Pratacultural Science
基金
河南科技大学博士科研启动基金项目(09001690
09001697)
关键词
高羊茅
氯化钙溶液
主成分分析
Festuca arundinacea
CaCl2 solution
principal components analysis
