Canopy water status and photosynthesis of tropical trees are associated with trunk sapwood hydraulic properties | |
Siddiq, Zafar2,3,4; Zhang, Yong-Jiang; Zhu, Shi-Dan; Cao, Kun-Fang | |
刊名 | PLANT PHYSIOLOGY AND BIOCHEMISTRY |
2019 | |
卷号 | 139期号:x页码:724-730 |
关键词 | FOREST CANOPY WOOD DENSITY STOMATAL CONDUCTANCE SAFETY MARGINS CO2 EXCHANGE RAIN-FOREST LEAF XYLEM STEM COORDINATION |
ISSN号 | 0981-9428 |
DOI | 10.1016/j.plaphy.2019.04.031 |
英文摘要 | Tree trunks not only provide physical support for canopy leaves but also supply and store water for transpiration. However, the relationships between trunk hydraulic properties and canopy leaf physiology in tropical trees are not well-understood. In this study we concurrently measured morning and midday canopy leaf photosynthesis (A), stomatal conductance (g(s)), and leaf water potentials (psi(L)) in 40 tropical trees representing 14 species at the beginning of the rainy season in Xishuangbanna, Southwest China. We also measured trunk sapwood capacitance (C), wood density, and sap flux density to assess their association with canopy leaf physiology. Among the 14 studied species, only three and four species did not show a significant midday reduction in A and g(s) respectively. The diurnally maximum A and g(s) were significantly positively related to sapwood hydraulic capacitance, maximum sap flux density (midday), and sap flux density at 11:00. Those species with lower wood density and higher C showed a lower reduction in psi(L) at midday, whereas, species with high C, and large values of maximum sap flux density also showed high carbon assimilation at midday. Our results provide new insights into the close coordination between canopy physiology and trunk sapwood hydraulic properties in tropical trees. |
学科主题 | Plant Sciences |
语种 | 英语 |
WOS记录号 | WOS:000469896200076 |
内容类型 | 期刊论文 |
源URL | [http://ir.xtbg.org.cn/handle/353005/11311] |
专题 | 西双版纳热带植物园_植物生理生态研究组 |
作者单位 | 1.Guangxi Univ, Coll Forestry, Plant Ecophysiol & Evolut Grp, State Key Lab Conservat & Utilizat Subtrop Agro B, Nanning 530005, Peoples R China 2.Guangxi Univ, Coll Forestry, Guangxi Key Lab Forest Ecol & Conservat, Nanning 530005, Peoples R China 3.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Menglun 666303, Peoples R China 4.Govt Coll Univ, Dept Bot, Lahore 54000, Pakistan 5.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 6.Univ Maine, Sch Biol & Ecol, Orono, ME 04469 USA |
推荐引用方式 GB/T 7714 | Siddiq, Zafar,Zhang, Yong-Jiang,Zhu, Shi-Dan,et al. Canopy water status and photosynthesis of tropical trees are associated with trunk sapwood hydraulic properties[J]. PLANT PHYSIOLOGY AND BIOCHEMISTRY,2019,139(x):724-730. |
APA | Siddiq, Zafar,Zhang, Yong-Jiang,Zhu, Shi-Dan,&Cao, Kun-Fang.(2019).Canopy water status and photosynthesis of tropical trees are associated with trunk sapwood hydraulic properties.PLANT PHYSIOLOGY AND BIOCHEMISTRY,139(x),724-730. |
MLA | Siddiq, Zafar,et al."Canopy water status and photosynthesis of tropical trees are associated with trunk sapwood hydraulic properties".PLANT PHYSIOLOGY AND BIOCHEMISTRY 139.x(2019):724-730. |
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