南方红豆杉种源光合特性差异及光环境效应  

Provenance Differences of Photosynthetic Characters of Taxus chinensis var.mairei Seedlings and Effect of Light Environment

作　　者：焦月玲[1] 周志春[1] 李因刚[1] 王剑[1] 王月生 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400 [2]浙江省淳安县富溪林场,浙江淳安311700

出　　处：《林业科学研究》2007年第5期731-735,共5页Forest Research

基　　金：国家林业局重点科技推广项目"南方红豆杉短周期药用林高产栽培示范"([2005]74号)

摘　　要：The provenance difference for photosynthetic characters of Taxus chinensis var.mairer seedling was studied by use of provenance trial under different shading condition located at Chun’an of Zhejiang.The result indicated that there were obvious provenance differences for height growth,dry matter accumulation,chlorophyll a,b and the total content,photosynthesis rate with different geographical genetic variation pattern.Seedling height was found to be positively and significantly related to the altitude and longitude of its seed source.Contrasting to seedling height,dry matter appeared to be certainly and negatively related to the altitude and longitude of its seed source.There were no obvious geographical variation pattern for chlorophyll content and photosynthesis rate.The provenances with more chlorophyll had higher photosynthesis rate and greater dry matter accumulation.Analysis demonstrated that there existed great effect of light environment on photosynthetic character of seedling.At September,the chlorophyll a,b and total content of the seedlings under light transmittance 10% were 12.0%,16.1% and 13.7% more than the ones under light transmittance 25% respectively.At October,the chlorophyll a,b and total content of the most provenances were declined under light transmittance 10%,and average photosynthesis rate of the provenances tested was 13.7% less than the one under light transmittance 25%. The change of chlorophyll content of provenance seedling at various growth stages varied with light condition.Under light transmittance 25%,the content of chlorophyll was lower at August,highest at September,and decreased or increased slightly at October.Under light transmittance 10%,the content of chlorophyll at October was descended above 20% than one at September.The provenance difference for photosynthetic characters of Taxus chinensis var. mairer seedling was studied by use of provenance trial under different shading condition located at Chun＇ an of Zhejiang. The result indicated that there were obvious provenance differences for height growth, dry matter accumulation, chlorophyll a, b and the total content, photosynthesis rate with different geographical genetic variation pattern. Seedling height was found to be positively and significantly related to the altitude and longitude of its seed source. Contrasting to seedling height, dry matter appeared to be certainly and negatively related to the altitude and longitude of its seed source. There were no obvious geographical variation pattern for chlorophyll content and photosynthesis rate. The provenances with more chlorophyll had higher photosynthesis rate and greater dry matter accumulation. Analysis demonstrated that there ex- isted great effect of light environment on photosynthetic character of seedling. At September, the chlorophyll a, b and total content of the seedlings under light transmittance 10% were 12.0% ,16.1% and 13.7% more than the ones under light transmittance 25% respectively. At October, the chlorophyll a, b and total content of the most provenances were declined under light transmittance 10%, and average photosynthesis rate of the provenances tested was 13.7% less than the one under light transmittance 25%. The change of chlorophyll content of provenance seed- ling at various growth stages varied with light condition. Under light transmittance 25% , the content of chlorophyll was lower at August, highest at September, and decreased or increased slightly at October. Under light transmit- tance 10% , the content of chlorophyll at October was descended above 20% than one at September.

关 键 词：南方红豆杉 种源 光合特性 光环境 

分 类 号：S791.49[农业科学—林木遗传育种]