斑皮柠檬桉不同种源光合特性比较分析  

Comparative Analysis on Photosynthetic Characteristics of Different Provenance of Corymbia citriodora ssp.variegata

作　　者：唐庆兰[1] 蒋钰渝 李昌荣[1] 邓紫宇[1] 项东云[1] 陈健波[1] 郭东强[1] 周维[1] 卢晨升 TANG Qinglan;JIANG Yuyu;LI Changrong;DENG Ziyul;XIANG Dongyun;CHEN Jianbo;GUODongqiang;ZHOU Weil;LU Chensheng(Guangxi Forestry Research lnstitute/Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation/Key Laboratory of Central South Fastgrowing Timber Cultivation of Forestry Ministry of China, Nanning, Guangxi 530002, China;Forestry College, Guangxi University, Nanning, Gnangxi 530004, China)

机构地区：[1]广西壮族自治区林业科学研究院/广西优良用材林资源培育重点实验室/国家林业局中南速生材繁育重点实验室,广西南宁530002 [2]广西大学林学院,广西南宁530004

出　　处：《热带作物学报》2018年第5期881-887,共7页Chinese Journal of Tropical Crops

基　　金：广西林科院基本业务费项目(林科201611号);广西林业科技项目(桂林科研[2015]第4号);国家林业局948项目(No.2013-4-48)

摘　　要：以斑皮柠檬桉10个种源的苗木为研究材料,测定分析其光响应曲线和特定光强的光合参数。结果表明:光饱和点最大的2个种源19694和20756达到1 700μmol.m^(-2).s^(-1),最小的是种源20883,光饱和点为1 333.33μmol.m^(-2).s^(-1)。种源19666、19691和20883光补偿点最低,低于14.0μmol.m^(-2).s^(-1),利用弱光的能力最强;种源19664、19665和20787光补偿点超过40μmol.m^(-2).s^(-1),对弱光的利用能力相对较差,种源19691、19694和19666光饱和点较高,光补偿点较低,对光环境的适应范围较大。光强为1 500μmol.m^(-2).s^(-1)时,10个种源的斑皮柠檬桉的净光合速率、气孔导度、胞间二氧化碳和蒸腾速率的差异都达到显著水平;光合特征参数与种源地地理信息的相关关系均未到达显著水平;种源19694、19665和20756属于高净光合速率较高水分利用效率的类型,种源19691属于高净光合速率低水分利用效率的类型;种源19666和20883属于低净光合速率高水分利用效率的类型;相关分析表明,经度、纬度和海拔对斑皮柠檬桉的光合特征参数均未起到主导作用。通过比较分析不同种源斑皮柠檬桉的光合作用差异性,以便在造林时根据环境、地形、地貌选择合适的种源。Taking the seedlings of Corymbia citriodora ssp. variegata from ten provenances as the studied materials, the photosynthetic light response curves and photosynthetic parameters of 1 500 μ mol-m-Ls-lwere recorded and analyzed. The results showed that the highest light saturation point （LSP） was 1 700 μ mol.m^-2.s^-1 （for 19694 and 20756）, and the lowest LSP was 1 333.33 μ mol-m^-2.s-l （for 20883）. The light compensation point （LCP） of 19666, 19691 and 20883 was under 14.0 μmol.m^-2-s^-1, with the highest capacity to utilize low light. LCP of 19664, 19665 and 20787 was higher than 40 tL mol- m^-2-s^-1, with weaker capacity to utilize low light. The provenance of 19691,19694 and 19666 had high LSP and low LCP, suggesting an adaptation to a wide range of light sources. The variance analysis results showed that the photosynthetic rate （Pn）, intercellular CO2 （Ci）, stomata1 conductance （Gs） and transpiration rate （Tr） among the ten provenances reached significant level when PAR at 1 500 μ mol.m-Ls^-1. The correlation of photosynthetic parameters with geographic information did not reached a significant level. The provenance 19694, 19665 and 20756 are grouped to the type of high Pn and high WUE. The provenance 19691 was classifified to the type of high Pn and low WUE. The provenance 19666 and 20883 were the type of medium to low Pn and high WUE. Correlation analysis showed that longitude, latitude and altitude did not played a dominant role in the photosynthetic characteristics of C. citriodora ssp. variegata. The comparison on the variations of photosynthesis of C. citriodora ssp. variegata seedlings of different provenances may facilitate the selection suitable provenances for plantation in landscapes of different features.

关 键 词：斑皮柠檬桉 种源 光响应曲线 光合参数 水分利用效率 

分 类 号：S792.39[农业科学—林木遗传育种]