水分胁迫对福建柏种子萌芽的影响  

Effects of Water Stress on Seed Germination of Fokienia Hodginsii

作　　者：陈坤浩[1] 刘城[1] 周玉璋[1] 

机构地区：[1]毕节学院环境与生命科学系,贵州毕节551700

出　　处：《现代农业科技》2009年第16期76-76,79,共2页Modern Agricultural Science and Technology

基　　金：贵州省毕节地区科技计划项目(毕科合字(2007)13号)

摘　　要：通过设置不同浓度的聚乙二醇(PEG)溶液模拟土壤的自然水势,以确定不同水分胁迫条件下福建柏种子萌芽的敏感性。结果表明:福建柏种子发芽的水势范围为0～-0.60MPa,低于-0.60MPa时其种子不能发芽。在水势为0～-0.60MPa的水分胁迫条件下,随着水势的下降,其发芽率、发芽指数、发芽速度、芽长、活力指数等都表现出明显的下降趋势,表明福建柏种子对水分胁迫极敏感。The sensitivity of seed germination ofFokienia hodginsii under different water stress conditions was studied by different concentrations of polyethylene glycol （PEG）solution, which was used to simulate the natural water potential of soil. R.esults showed that the water potential of seed germination ofFokienia hodginsii range 0-0.60MPa. The seeds would not germinate below-0.6MPa.Under the water stress in potential of 0-0.6 MPa, the germination rate, germination index, germination speed ,bud length and vigor index etc. showed the descended trend, with the decline in water potential. It indicated that Fokienia hodginsii seed was extremely sensitive to the water stress.

关 键 词：福建柏 水分协迫 萌芽 

分 类 号：S791.43[农业科学—林木遗传育种]