[1]张中峰,黄玉清,莫凌,等.岩溶区4种石山植物光合作用的光响应[J].西北林学院学报,2009,24(01):44-48.
 ZHANG Zhongfeng,HUANG Yuqing,MO Ling,et al.Photosynthesis Light Response Characteristics of Four Limestone Plants in Karst Area[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2009,24(01):44-48.
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岩溶区4种石山植物光合作用的光响应()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第24卷
期数:
2009年01期
页码:
44-48
栏目:
出版日期:
2009-01-20

文章信息/Info

Title:
Photosynthesis Light Response Characteristics of Four Limestone Plants in Karst Area
作者:
张中峰1 黄玉清1莫凌1 袁维园12
(1.广西壮族自治区、中国科学院 广西植物研究所,广西 桂林 541006; 2.广西师范大学,广西 桂林 541002)
Author(s):
ZHANG Zhongfeng1 HUANG Yuqing1 MO Ling1 YUAN Weiyuan12
(1.Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and the Chinese Academy of Sciences,Guilin ,Guangxi 541006, China ;2.Guangxi Normal University, Guilin, Guangxi 541002, China)
关键词:
岩溶区石山植物光合作用光响应曲线水分利用效率
Keywords:
Karst arealimestone plantsphotosynthesislight response curve water use efficiency
分类号:
S718.43
文献标志码:
A
摘要:
为阐明石山植物对光与水分的适应能力,采用Li6400光合作用测定系统,对岩溶区石山植物红背山麻杆、九龙藤、青檀和圆叶乌桕生长盛期的光响应曲线进行了测定,并利用非直角双曲线模型对4种植物光合作用生理参数进行拟合。结果表明;红背山麻杆具有较高的光饱和点Lsp(1 026.57 μmol·m-2·s-1)、最大净光合速率Pmax(11.52 μmol·m-2·s-1)和较低的光补偿点Lcp(3.87 μmol·m-2·s-1),表现为典型的喜阳性特点;九龙藤的表观量子效率α(0.075)最大,Lsp(627.71 μmol·m-2·s-1)、Lcp(2.06 μmol·m-2·s-1)、Pmax(6.68 μmol·m-2·s-1)最低,表现为弱阳性特点;青檀和圆叶乌桕表观量子效率较低,分别为0.054、0.060,Lsp和Lcp都相对较高,表现为阳性植物特点;九龙藤与红背山麻杆水分利用效率高于乔木树种青檀与圆叶乌桕。九龙藤与红背山麻杆在高温干旱的岩溶环境下具有较好的适应性,而青檀与圆叶乌桕虽然光合能力较强,但较低的水分利用效率不利于在石山上生存,这可能是岩溶区石山上高大乔木较少,而以灌丛植被类型为主的原因之一。西北林学院学报24卷
Abstract:
The aim of this study was to reveal the adaptation response of limestone plants to light and water. The light response curves of limestone plants Alchornea trewioides, Bauhinia championii, Pteroceltis tatarinowii, Sapium rotundifolium were measured with Licor6400 Photosynthesis Analyzer in Karst area, and parameters of photosynthesis were simulated by nonrectangle hyperbolae function. The results showed that A. trewioides had high light saturatioon point(Lsp1 026.57 μmol·m-2·s-1) high maxumum net photosynthetic rate(Pmax 11.52 μmol·m-2·s-1),and low light compensation point (Lcp 3.87 μmol·m-2·s-1), featuring in typical sciophytes characteristic. B. championii had high apparent quantum yield α(0.075)and low Lsp ( 627.71 μmol·m-2·s-1)、Lcp (2.06 μmol·m-2·s-1)、Pmax(6.68 μmol·m-2·s-1), featuring in weak sciophytes characteristic. P. tatarinowii and S. rotundifolium showed sciophytes characteristic, they had low α and high Lsp and Lcp. The water use efficiency (WUE) of A. trewioides and B. championii were higher than those of P. tatarinowii and S. rotundifolium. B.championii and A. trewioides could adapted well to the drought and thermal Karst environment. While P. tatarinowii and S. rotundifolium have higher light utlizing capibility and lower WUE. This maybe one result of limestone hills were lack of tree but mainly distributing shrubbery in Karst area.

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备注/Memo

备注/Memo:
收稿日期:20080317修回日期:20080630基金项目:国家科技支撑计划项目(2006BAC01A10);中国科学院西部之光人才培养项目(2005);广西自然科学基金(桂科回0575009)作者简介:张中峰,男,硕士,研究实习员,主要从事岩溶植物生理生态研究. Email:zfzhangwww@gmail.com。
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