濒危植物天台鹅耳枥幼苗光合特性研究  

Study on Seedling Photosynthetic Character of Endangered Plant Carpinus tientaiensis

作　　者：施灵栋 张忠钊 季梦成[3] 范义荣[3] 刘志高[3] 

机构地区：[1]天台县赤城街道林业站,浙江天台317200 [2]天台县林业特产局,浙江天台317200 [3]浙江农林大学风景园林与建筑学院,浙江临安311300

出　　处：《湖北农业科学》2016年第19期4949-4951,5006,共4页Hubei Agricultural Sciences

基　　金：浙江省省级财政林业专项补助资金项目(2014)

摘　　要：使用LI-6400型便携式光合仪,对天台鹅耳枥(Carpinus tientaiensis)幼苗的光合参数进行测定与分析。结果表明,天台鹅耳枥幼苗表观量子效率(AQY)为5.33%,弱光利用能力不强,光补偿点(LCP)为67.42μmol/m2·s,光饱和点(LSP)为1 400.00μmol/m2·s,可以有效利用强光进行光合作用。天台鹅耳枥幼苗净光合速率日变化呈单峰曲线,上午11:00净光合速率达到最大1 823.72μmol CO2/m2·s,具备良好的高温适应性。相关性分析表明,净光合速率(Pn)与外界光强(PAR)、蒸腾速率(Tr)和叶片温度(Teaf)呈极显著正相关,与胞间二氧化碳浓度(Ci)呈显著负相关。The photosynthetic parameters of seedlings of Carpinus tientaiensis determinated and compared by using Li-6400 portable photosynthesis system. The results showed that apparent quantum efficiency of seedlings of Carpinus tientaiensis was5.33%,light compensation point was 67.42 μmol / m2·s,light saturation point was 1 400.00 μmol / m2·s. The diurnal changes of photosynthetic rate of Carpinus tientaiensis presented a single-apex curve,its highest Pn 1 823.72 μmol CO2/ m2·s showed up at 11：00,that seedlings of Carpinus tientaiensis can well adapt high tempreture. Net photosynthetic rate had extremely positive significant correlation between PAR,Tr and Tleaf. There was also extremely positive significant correlation between Pn and Ci.

关 键 词：天台鹅耳枥(Carpinus tientaiensis) 幼苗 光合特性 

分 类 号：Q945.11[生物学—植物学] S792.159[农业科学—林木遗传育种]