水盐胁迫对上海4个防护林树种生长和生理特性的影响  

Effects of Water-Salt Stress on Growth and Physiological Index of 4 Protective Forest Tree Species in ShangHai

作　　者：杨东[1] 万福绪[2] 李盟[2] 

机构地区：[1]南京林业大学材料科学与工程学院,南京210037 [2]南京林业大学森林资源与环境学院,南京210037

出　　处：《水土保持研究》2014年第1期254-260,共7页Research of Soil and Water Conservation

基　　金：上海市科技兴农重点攻关项目(2008-10-2)

摘　　要：通过盆栽试验研究了上海4个防护林树种受水盐胁迫后的生长和生理指标,结果表明:水盐胁迫下不同树种的苗高和地径生长、生物量积累有明显差异;相对电导率、叶绿素、可溶性蛋白质、超氧化物歧化酶(SOD)和脯氨酸(Pro)含量随水盐胁迫水平和时间的增加呈现先增加后降低的趋势;丙二醛(MDA)含量则处于不断增加状态,但在处理水平和响应时间上树种间的差异较大。采用主成分分析法,筛选出苗高、地径、生物量、质膜透性、脯氨酸含量5个形态和生理指标作为评价防护林树种耐水盐能力的主要指标;根据主成分得分值,4个树种耐水盐胁迫能力大小顺序为乌桕>落羽杉>喜树>栾树。The pot experiments were conducted to investigate the changes of 4 shelterbelt tree species growth and physiological characteristics under water salt stress. The results showed that during the whole growth period, the growth rate of seedling height and collar diameter, biomass accumulation were obviously differ ent. With the stress level and testing time increase, relative penetrability, chlorophyll, soluble protein, SOD activity, and Pro content presented the trend of first increasing then decreasing, while MDA content was continuously increasing. But water-salt stress level and response time were significantly different among all the tree species. Through principal component analysis （PCA）, seedling height, collar diameter, biomass, relative penetrability, Pro content were used as the main factors to select shelterbelt tree species. Based on this evaluation system, the tolerance ability under water-salt stress of tree species was in the order of Sapium sebi f erurn〉 Ta.rodiurn distichum 〉 Camptotheca acuminata 〉Koelreuteria paniculata.

关 键 词：水盐胁迫 防护林 生长 生理特性 评价 

分 类 号：Q945.78[生物学—植物学]