西南林业大学学报Issue(5)：8-13,6.DOI:10.11929/j.issn.2095-1914.2015.05.002
云南松不同种源苗木光合特性比较
Compare on Photosynthetic Characteristics Among Provenances of Pinus yunnanensis
摘要
Abstract
The photosynthetic characteristics were compared for two-year-old seedlings of Pinus yunnanensis sampled five provenances by using the Li-6400 to reveal the difference of photosynthetic characteristics among prov-enances.The results indicated that all photosynthetic parameters studied were significant difference (p <0.01 ) among provenances of P.yunnanensis except the light use efficiency (LUE).There were light differences in the net photosynthetic rate (Pn )among provenances when the illumination intensity increased initially based on light response curve fitting,but significant differences came to light when the illumination intensity increased progressive-ly.There were significant (p <0.05)and extremely significant (p <0.01)correlations most of pair-wise photosyn-thetic indexes.The extremely positive correlations existed in pair-wise Pn ,stomatal conductance (Gs )and transpira-tion (Tr).The correlations were relatively heavy between Pn and Gs as well as photosynthetically active radiation (PAR),which indicated that Pn was a main photosynthetic capacity factor.There were the highest maximum net photosynthetic rate (Pmax ),light saturation point (LSP)and water use efficiency (WUE),and the minimum Tr,Gs and light compensation point (LCP)in Baoshan (BS)provenance.The provenance has the high potential photosyn-thetic capacity and the strong drought resistance ability,which further illustrated Baoshan provenance has the strong potential to adaptable to the light environment.关键词
云南松/种源/光合特性/光响应曲线/净光合速率Key words
Pinus yunnanensis/provenance/photosynthetic characteristics/light response curve/net photo-synthetic rate分类
农业科技引用本文复制引用
周丽,陈诗,徐杨,蔡年辉,李悦,段安安,许玉兰..云南松不同种源苗木光合特性比较[J].西南林业大学学报,2015,(5):8-13,6.基金项目
西南林业大学科技创新基金（1453）资助。 （）
