摘要
以白花树江西大余、贵州从江、湖南宜章、福建永安、广西上思和云南屏边等6个种源的1年生苗为试验材料,利用Li-6400便携式光合作用测定系统对自然条件下不同种源的光合-CO2响应特性进行了研究。结果表明:光合-CO2响应参数存在不同程度的种源差异,CO2补偿点最低的是江西大余种源(54.9μmol/mol),CO2饱和点最高的是云南屏边种源(2 244.2μmol/mol)。随外界CO2浓度升高,所有参试种源的水分利用效率WUE均呈现线性上升,气孔导度Gs与蒸腾速率Tr表现出先上升后下降的趋势。
In this study,one-year-old seedlings of 6 Styrax tonkinesis provenances including Dayu of Jiangxi,Congjiang of Guizhou,Yizhang of Hunan,Yong＇an of Fujian,Shangsi of Guangxi and Pingbian of Yunnan,were selected as test materials.Li-6400 portable photosynthesis system was used to detect the photosynthetic-CO2 response characteristics of different provenances under natural conditions.The results are as follows： the photosynthetic-CO2 response parameters were different to some extent among different provenances.The CO2 saturation point of Pingbian of Yunnan was the highest among the 6 provenances,while the CO2 compensation point of Dayu of Jiangxi was the lowest.As the CO2 concentration rose,the WUE（water using efficiency） curve of these selected provenances showed linear rise,while Gs（Stomatal conductance） and Tr（Transpiration rate） showed the tendency of first ascending and then descending.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2011年第6期1128-1133,共6页
Acta Agriculturae Universitatis Jiangxiensis
基金
浙江省重大科技专项(2008C12019)
浙江省创新团队建设与人才培养项目(2010F20014)
浙江省省院合作林业科技项目(2010SY05)
关键词
白花树
苗木
种源
光合-CO2响应
Styrax tonkinesis
seedlings
provenances
photosynthetic-CO2 response
