摘要
温室内对半红树植物水黄皮幼苗进行7个盐度(5、8、11、14、17、20、23 g.kg-1)的胁迫处理,对各处理下水黄皮生长量、生物量、生理指标和光合速率进行测定,结合10项生长信息指标进行主成分分析。结果表明:水黄皮的苗高增量、地径增量、叶片数增量、根、径、叶干重及总生物量随着盐度的上升均呈下降趋势,在盐度为5和8 g.kg-1的处理下保持较高值,盐度超过11 g.kg-1后骤降;光合速率在盐度为5、8、11 g.kg-1处理下保持较高值,最大值出现在盐度为8 g.kg-1的处理下;SOD活性、游离脯氨酸、质膜透性和丙二醛均有随盐度增大而呈上升趋势;在盐度为5、8 g.kg-1处理下主成分得分较高,水黄皮较适生长,盐度超过11 g.kg-1后不适生长。
Pongamia pinnata seedlings with seven salt gradients（5,8,11,14,17,20,and 23 g·kg-1） were dealt in the greenhouse.The increment,biomass,physiological indexes and photosynthetic rate of Pongamia pinnata seedlings with different salinity treatments were determined,and the principal component analysis combined with ten growth information indexes was made.The results show that height increment,stem increment,leaf increment,root dry weight,stem dry weight,leaf dry weight and total biomass decreased with increasing of the salt,and they kept high values when the treatment salt were 5 or 8 g·kg^-1,but they brought down suddenly when the treatment salt were more than 11 g·kg^-1.The photosynthesis of Pongamia pinnata seedling was high with the salt treatment of 5,8 and 11 g·kg^-1,and maximum value was under the salt treatment of 8 g·kg^-1.Superoxide dismutase,proline,malonaldehyde and membrane permeability increased with rising of the salt.The principal component analysis obtained the result that the suited salinity range for Pongamia pinnata seedlings was below 8 g·kg^-1,and the growth would be inhibited when the salinity was more than 11 g·kg^-1.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2010年第10期62-67,共6页
Journal of Central South University of Forestry & Technology
基金
"十一五"国家科技支撑计划项目:华南沿海红树林保护与恢复重建技术试验示范(2006BAD03A1402)
"十一五"国家科技支撑计划项目子专题:北部湾等沿海困难滩涂红树林带构建技术研究与示范(2009BADB2B04-02)
关键词
水黄皮
盐胁迫
生理指标
生物量
主成分分析
Pongamia pinnata
salt stress
physiological index
biomass
principal component analysis
