菌根化马尾松对干旱胁迫的响应及其内源多胺的变化  

Drought Responses and Related Endogenous Polyamine Changes in Mycorrhizaed Pinus massoniana

作　　者：徐超[1] 吴小芹[1] 

机构地区：[1]南京林业大学森林资源与环境学院,南京210037

出　　处：《西北植物学报》2009年第2期296-301,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金(30571471);国家十一五"林业科技支撑计划(2006BAD08A1002)

摘　　要：以分别接种4种外生菌根真菌及其混合菌的5种菌根化马尾松植株为材料,在室内进行自然模拟干旱胁迫处理,考察了各处理植株的萎蔫率、萎蔫度及其针叶中的腐胺(Put)、亚精胺(Spd)和精胺(Spm)含量的变化,探讨多胺在外生菌根提高马尾松抗旱能力过程中的作用.结果显示:接种外生菌根真菌能够显著提高植株定植土壤的保水能力,显著降低植株的萎蔫率和萎蔫度;在干旱胁迫过程中,菌根化植株的Spm含量、多胺总量均高于对照植株且含量相对稳定,而菌根化植株和对照植株的Spd含量均无明显变化,对照植株和紫金蜡蘑菌根化植株的Put含量相对较高且变化幅度较大.研究发现,外生菌根能提高马尾松植株内源Spm含量和Put的降解能力,调节各种内源多胺的分配比例,最终显著提高马尾松植株的抗旱能力.Pinus massoniana inoculated by four different ectomycorrhizal fungis respectively and mixed fungi were used to be test materials.Following a drought stress in the greenhouse,the wilting rate,wilting degree and relative soil content were studied on different treatmented Pinus massoniana.The results showed that ectmycorrhiza enhanced the relative soil content and reduced the wilting rate and wilting degree significantly;the Spm and the total polyamine content are all higher and relatively more stable in the i...

关 键 词：外生菌根 内源多胺 干旱胁迫 马尾松 

分 类 号：S791.248[农业科学—林木遗传育种]