摘要
为进行耐荫蕨类筛选,通过收集文献数据,选择比叶面积、比叶重、叶绿素含量、最大光合速率、光补偿点和光饱和点6个指标,计算各指标的表型可塑性指数（PPI）和耐荫临界值（STT）.结果表明：蕨类植物的PPI变化范围为0·74~0·96,各指标的STT值分别为叶绿素质量分数1·9 mg·g-1、叶绿素a/b值2·3、比叶重36 g·cm-2、最大光合速率5·5μmol·m-2·s-1、光补偿点24μmol·m-2·s-1、光饱和点460μmol·m-2·s-1.利用STT值可以进行多途径的耐荫蕨类评价和筛选.
For the purpose of shade-tolerant fern screening,six indicators were chosen,which were specific leaf area,leaf mass per area,chlorophyll contents,maximum photosynthetic rate,light compensation point,and light saturation point,then the phenotypic plasticity index（PPI） and shade-tolerant threshold（STT） for the six indicators were calculated based on collected literature data.The results showed that the PPI of ferns varied within a range of 0.74-0.96.The STT values of each index were as follows： chlorophyll content of 1.9 mg·g-1,chlorophyll a/b ratio of 2.3,leaf mass per area of 36 g·cm-2,maximum photosynthetic rate of 5.5 μmol·m-2·s-1,light compensation point of 24 μmol·m-2·s-1,and light saturation point of 460 μmol·m-2·s-1.The STT values can be used as evaluation and selection of shade-tolerant ferns in various ways.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2011年第4期413-420,共8页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
浙江省丽水市技术开发委托资助项目(2008-2012)
南京林业大学大学生科技创新资助项目
关键词
叶绿素含量
光合参数
表型可塑性指数
耐荫临界值
蕨类
chlorophyll contents
photosynthetic parameters
phenotypic plasticity index
shade-tolerant threshold
ferns
