干旱胁迫对5个海岛树种生长及生理特性的影响  

Growth and physiological characteristics of five island tree species with drought stress

作　　者：陈闻 赵颖 叶正钱[2] 王美琴 王晶 王国明 

机构地区：[1]浙江省舟山市林业科学研究院,浙江舟山316000 [2]浙江农林大学环境与资源学院,浙江临安311300

出　　处：《浙江农林大学学报》2013年第4期490-498,共9页Journal of Zhejiang A&F University

基　　金：浙江省重大科技专项(2010C12024);浙江省舟山市科技计划项目(2011C13029)

摘　　要：为了解全缘冬青Ilex integra,红楠Machilus thunbergii,普陀樟Cinnamomum japonicum var.chenii,滨柃Euryaemarginata,柃木Eurya japonica等5个海岛树种的抗旱性,利用盆栽控水方式对5个海岛树种进行干旱胁迫试验,测定相关的生理指标,比较了5个树种之间抗旱能力的大小。结果表明:各树种的地上部分和地下部分生物量随着胁迫程度的增加而持续下降,而根茎比呈现出先降后升的变化趋势;5个树种的脯氨酸和相对电导率随干旱程度的加剧而呈上升趋势,叶绿素则随干旱程度的加深而明显下降。在重度胁迫下,5个树种的存活率大小依次为普陀樟>全缘冬青>红楠=滨柃>柃木。通过隶属函数法分析得出5个树种在中度干旱和重度干旱条件下的抗旱性顺序为普陀樟>全缘冬青>红楠>柃木>滨柃。To compare the drought-resistance of five island tree species,namely,Ilex integra,Machilus thunbergii,Cinnamomum japonicum var.chenii,Eurya emarginata,and Eurya japonica,an experiment was conducted using tree seedlings with different soil drought stress levels.Plant physiological responses to the drought stress were measured.Results showed that the root and shoot biomass decreased as drought increased,but the root-to-shoot ratios（R/S） increased first and then decreased.In addition,chlorophyll content（Chl） decreased as drought stress increased.With severe drought stress,the survival rate was C.japonicum var.chenii ＆gt; I.integra ＆gt; M.thunbergii = E.emarginata ＆gt; E.japonica.A subordinate function used to rank drought-resistance showed： C.japonicum var.chenii ＆gt; I.integra ＆gt; M.thunbergii ＆gt; E.japonica ＆gt;E.emarginata.

关 键 词：树木生理学 干旱胁迫 生理指标 海岛树种 抗旱性 

分 类 号：S718.3[农业科学—林学]