DOI: 10.1111/gcb.12314
论文题名: Photosynthesis of temperate Eucalyptus globulus trees outside their native range has limited adjustment to elevated CO2 and climate warming
作者: Crous K.Y. ; Quentin A.G. ; Lin Y.-S. ; Medlyn B.E. ; Williams D.G. ; Barton C.V.M. ; Ellsworth D.S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 12 起始页码: 3790
结束页码: 3807
语种: 英语
Scopus关键词: acclimation
; carbon dioxide
; climate change
; environmental change
; evergreen tree
; global warming
; photosynthesis
; carbon dioxide
; acclimatization
; article
; Australia
; climate
; Eucalyptus
; greenhouse effect
; growth, development and aging
; metabolism
; photosynthesis
; season
; Acclimatization
; Carbon Dioxide
; Climate
; Eucalyptus
; Global Warming
; New South Wales
; Photosynthesis
; Seasons
英文摘要: Eucalyptus species are grown widely outside of their native ranges in plantations on all vegetated continents of the world. We predicted that such a plantation species would show high potential for acclimation of photosynthetic traits across a wide range of growth conditions, including elevated [CO2] and climate warming. To test this prediction, we planted temperate Eucalyptus globulus Labill. seedlings in climate-controlled chambers in the field located >700 km closer to the equator than the nearest natural occurrence of this species. Trees were grown in a complete factorial combination of elevated CO2 concentration (eC; ambient [CO2] +240 ppm) and air warming treatments (eT; ambient +3 °C) for 15 months until they reached ca. 10 m height. There was little acclimation of photosynthetic capacity to eC and hence the CO2-induced photosynthetic enhancement was large (ca. 50%) in this treatment during summer. The warming treatment significantly increased rates of both carboxylation capacity (Vcmax) and electron transport (Jmax) (measured at a common temperature of 25 °C) during winter, but decreased them significantly by 20-30% in summer. The photosynthetic CO2 compensation point in the absence of dark respiration (Γ*) was relatively less sensitive to temperature in this temperate eucalypt species than for warm-season tobacco. The temperature optima for photosynthesis and Jmax significantly changed by about 6 °C between winter and summer, but without further adjustment from early to late summer. These results suggest that there is an upper limit for the photosynthetic capacity of E. globulus ssp. globulus outside its native range to acclimate to growth temperatures above 25 °C. Limitations to temperature acclimation of photosynthesis in summer may be one factor that defines climate zones where E. globulus plantation productivity can be sustained under anticipated global environmental change. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62274
Appears in Collections: 影响、适应和脆弱性
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作者单位: Hawkesbury Institute for the Environment, University of Western Sydney, Locked Bag 1797, Penrith, NSW, 2751, Australia; Research School of Biology, The Australian National University, GPO Box 475, Canberra, ACT, 0200, Australia; CSIRO Ecosystem Sciences, Private Bag 12, Hobart, TAS, 7001, Australia; Department of Biological Sciences, Macquarie University, North Ryde, NSW, 2109, Australia; Departments of Ecosystem Science and Management and Botany, University of Wyoming, Laramie, WY, 82071, United States
Recommended Citation:
Crous K.Y.,Quentin A.G.,Lin Y.-S.,et al. Photosynthesis of temperate Eucalyptus globulus trees outside their native range has limited adjustment to elevated CO2 and climate warming[J]. Global Change Biology,2013-01-01,19(12)