不同光环境下濒危植物崖柏的光合日动态

崖柏（Thuja sutchuenensis Franch.）为柏科（cu-pressaceae）崖柏属常绿乔木，是我国特有的珍稀濒危植物[1]。该植物目前多见于重庆城口县和开县交界的石灰岩山地，喜光，生长缓慢，耐瘠薄。目前有关崖柏的研究有遗传多样性心[2-3]、群落生态学[4]、无性繁殖[5]和低温适应机制[6]等，但是崖柏光合特征参数与环境因子的相关性及其对光环境响应方面的研究尚未见报道。...

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Published in林业科学研究 Vol. 26; no. 3; pp. 373 - 378
Main Author 杨文娟 江泽平 刘建锋 郭泉水
Format Journal Article
LanguageChinese
Published 中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091%中国林业科学研究院森林生态环境与保护研究所,北京,100091 2013
Subjects
光合作用
光环境
崖柏
日变化
崖柏
光环境
光合作用
photosynthetic
diurnal changes
日变化
Thuja sutchuenensis
light environment
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ISSN1001-1498

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Summary:崖柏（Thuja sutchuenensis Franch.）为柏科（cu-pressaceae）崖柏属常绿乔木，是我国特有的珍稀濒危植物[1]。该植物目前多见于重庆城口县和开县交界的石灰岩山地，喜光，生长缓慢，耐瘠薄。目前有关崖柏的研究有遗传多样性心[2-3]、群落生态学[4]、无性繁殖[5]和低温适应机制[6]等，但是崖柏光合特征参数与环境因子的相关性及其对光环境响应方面的研究尚未见报道。
Bibliography:YANG Wen-juan,JIANG Ze-ping,LIU Jian-feng, GUO Quan-shui （1.Research Institute of Forestry, Chinese Academy of Forestry; Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091 ,China; 2. Research Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091 ,China）
11-1221/S
This study focused on the photosynthetic characteristics of Thuja sutchuenensis seedlings and its relationship with environmental factors under three light levels （full light, 50% full light, and 25% full light）. The results showed that under different light environments, the maximum value of net photosynthetic rate Pn appeared at the 8：00 with the sizes were 6.48,4.59, and 2.67 μmol· m^-2·s^-1 There existed ＂midday-depression＂ in the diurnal photosynthesis of T. sutchuenensis, which mostly contributed by non-stomatal factors. The results of path analysis demonstrated that among the environmental factors affecting the pho light environments, the photosynthetically a
ISSN:1001-1498