湿地松优良半同胞家系光和CO_2响应曲线特征参数的变异规律  

The variance rule of character parameters responding to light and CO_2 of slash pine's half-sib

作　　者：童方平[1,2] 徐艳平[1] 宋庆安[1,2] 龙应忠[1,2] 易霭琴[1,2] 李贵[3] 

机构地区：[1]湖南省林业科学院,湖南长沙410004 [2]湖南省林木无性系育种重点实验室,湖南长沙410004 [3]中南林业科技大学资源与环境学院,湖南长沙410004

出　　处：《南京林业大学学报（自然科学版）》2009年第1期54-58,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：湖南省自然科学基金资助项目(05JJ3072)

摘　　要：使用LI-6400便携式光合测定系统,研究了湿地松优良半同胞家系的光和CO2响应情况,结果表明:不同湿地松半同胞家系光响应曲线、CO2响应曲线的特征参数在家系品种间有极显著差异。湿地松各半同胞家系1龄针叶在全年中以3至4月份、2龄针叶以4月份的表观光量子效率为最高,所有针叶以5月份最低,各家系1龄、2龄针叶的羧化效率以5月最低,8至9月最高。所有家系的1龄针叶、2龄针叶的表观光量子效率、羧化效率均高于普通品种,1龄针叶的表观光量子效率、羧化效率要高于2龄针叶的。具有较高的表观光量子效率、羧化效率、光饱和点、CO2饱和点和较低的光和CO2补偿点,是湿地松优良半同胞家系具有较高生长量和产量的主要生理原因。The responses to light and CO2 of slash pine＇ s half-sib were studied for establishing reasonable strategy in heredity improvement and planting using LI -6400 portable photosynthetic system. There were significant differences of the character parameters which responded to light and CO2 of slash pine＇ s half-sib. The apparent quantum yield on March to April of 1 year needle of slash pine＇ s half-sib and the apparent quantum yield on April of 2 year needle of slash pine＇ s half-sib was the highest in a year. The apparent quantum yield on May of 1 and 2 year needle of slash pine＇ s half-sib was the lowest. The carboxylation efficiency on May of 1 and 2 year needle of slash pine＇ s half-sib was the lowest while the carboxylation efficiency on August to September of 1 and 2 year needle of slash pine＇ s half-sib was the highest. The apparent quantum yield and carboxylation efficiency of slash pine＇ s half-sib were higher than that of general variety. The apparent quantum yield and carboxylation efficiency of 1 year needle were higher than that of 2 year needle＇ s. The main physiological mechanism of fast growth and high yield of slash pine＇ s half-sib was that it had highest apparent quantum yield, carboxylation efficiency, saturation point of light, saturation point of CO2 and lower compensation point of light , compensation point of CO2.

关 键 词：湿地松 半同胞家系 非直线双曲线模型 表观光量子效率 羧化效率 

分 类 号：S718.43[农业科学—林学]