DOI: 10.1111/gcb.14330
Scopus记录号: 2-s2.0-85053909371
论文题名: Photosynthetic capacity and leaf nitrogen decline along a controlled climate gradient in provenances of two widely distributed Eucalyptus species
作者: Crous K.Y. ; Drake J.E. ; Aspinwall M.J. ; Sharwood R.E. ; Tjoelker M.G. ; Ghannoum O.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 10 起始页码: 4626
结束页码: 4644
语种: 英语
英文关键词: growth temperature
; J max
; leaf respiration
; optimum temperature
; photosynthesis
; R/A ratio
; thermal acclimation
; V cmax
; warming
Scopus关键词: Eucalyptus
; Eucalyptus tereticornis
英文摘要: Climate is an important factor limiting tree distributions and adaptation to different thermal environments may influence how tree populations respond to climate warming. Given the current rate of warming, it has been hypothesized that tree populations in warmer, more thermally stable climates may have limited capacity to respond physiologically to warming compared to populations from cooler, more seasonal climates. We determined in a controlled environment how several provenances of widely distributed Eucalyptus tereticornis and E. grandis adjusted their photosynthetic capacity to +3.5°C warming along their native distribution range (~16–38°S) and whether climate of seed origin of the provenances influenced their response to different growth temperatures. We also tested how temperature optima (Topt) of photosynthesis and Jmax responded to higher growth temperatures. Our results showed increased photosynthesis rates at a standardized temperature with warming in temperate provenances, while rates in tropical provenances were reduced by about 40% compared to their temperate counterparts. Temperature optima of photosynthesis increased as provenances were exposed to warmer growth temperatures. Both species had ~30% reduced photosynthetic capacity in tropical and subtropical provenances related to reduced leaf nitrogen and leaf Rubisco content compared to temperate provenances. Tropical provenances operated closer to their thermal optimum and came within 3% of the Topt of Jmax during the daily temperature maxima. Hence, further warming may negatively affect C uptake and tree growth in warmer climates, whereas eucalypts in cooler climates may benefit from moderate warming. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110199
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia; Department of Forest and Natural Resources Management, SUNY College of Environmental Science and Forestry, Syracuse, NY, United States; Department of Biology, University of North Florida, Jacksonville, FL, United States; Division of Plant Sciences, Research School of Biology, The Australian National University, Canberra, ACT, Australia
Recommended Citation:
Crous K.Y.,Drake J.E.,Aspinwall M.J.,et al. Photosynthetic capacity and leaf nitrogen decline along a controlled climate gradient in provenances of two widely distributed Eucalyptus species[J]. Global Change Biology,2018-01-01,24(10)