低温胁迫下7种木麻黄变异类型抗寒性的比较  

Comparision of cold resistance characteristics in 7 variations of Casuarina equisetifolia

作　　者：邬金[1] 温国胜[1] 王电杰[1] 陈嘉琦[1] 王淘淘[1] 吴建其[1] 

机构地区：[1]浙江农林大学亚热带森林培育国家重点实验室培育基地,浙江临安311300

出　　处：《福建林学院学报》2013年第1期34-37,共4页Journal of Fujian College of Forestry

基　　金：浙江省林业专项补助资金资助项目(2010B10);浙江省科技厅重大项目(2006C12003)

摘　　要：利用叶绿素荧光技术测定自然低温胁迫前后浙江大鹿岛7种木麻黄变异类型的叶绿素荧光参数的变化。结果表明,木麻黄各变异类型表现出不同的适应性,变异类型R5的PSⅡ实际光化学量子产量最大,光合作用效率最强,表现出最强的抗寒性;G7的PSⅡ光化学效率(Fv/Fm)降幅最大,光合作用效率相对较弱,抗寒性最弱;其他类型抗寒性适中。低温胁迫下,各变异类型的非光化学猝灭系数(qN)均有不同程度的增加,也反应了木麻黄各变异类型抵抗低温伤害光合机制的差异。The test was conducted on the changes of chlorophyll fluorescence characteristics in leaves of 7 variations of Casuarina equisetifolia from Big Deer Islands in Zhejiang, before and after a natural low temperature stress. The results showed that each variation had displayed different adaptabilities. R5 showed the strongest cold resistance with its greatest actual photochemistry quantum yield for PS Ⅱ which indicated the most powerful photosynthesis efficiency. Fv/Fm of G7 dropped most with the relatively weakest photosynthetic efficiency and cold resistance, as for cold resistance of the rest 5 variations were moderate. The qN of each variation had gotten different degrees of increase under the low temperature stress, which reacted diversities of the photosynthetic mechanisms for low temperature resistance damage.

关 键 词：木麻黄 低温胁迫 叶绿素荧光 抗寒性 

分 类 号：S792.93[农业科学—林木遗传育种]