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Strong thermal acclimation of photosynthesis in tropical and temperate wet-forest tree species: the importance of altered Rubisco content

文献类型：期刊论文

作者Scafaro, AP; Xiang, S; Long, BM; Bahar, NHA; Weerasinghe, LK; Creek, D; Evans, JR; Reich, PB; Atkin, OK; Atkin, OK (reprint author), Australian Natl Univ, ARC Ctr Excellence Plant Energy Biol, Res Sch Biol, Bldg 134, Canberra, ACT 2601, Australia.
刊名GLOBAL CHANGE BIOLOGY
出版日期2017
卷号23期号:7页码:1-18
关键词Climate Modelling Earth System Models Photosynthesis Photosynthesis Modelling Rubisco Content Temperature Thermal Acclimation Tropical Trees V-cmax
DOI10.1111/gcb.13566
产权排序2
文献子类Article
英文摘要Understanding of the extent of acclimation of light-saturated net photosynthesis (A(n)) to temperature (T), and associated underlying mechanisms, remains limited. This is a key knowledge gap given the importance of thermal acclimation for plant functioning, both under current and future higher temperatures, limiting the accuracy and realism of Earth system model (ESM) predictions. Given this, we analysed and modelled T-dependent changes in photosynthetic capacity in 10 wet-forest tree species: six from temperate forests and four from tropical forests. Temperate and tropical species were each acclimated to three daytime growth temperatures (T-growth): temperate -15, 20 and 25 degrees C; tropical -25, 30 and 35 degrees C. CO2 response curves of An were used to model maximal rates of RuBP (ribulose-1,5-bisphosphate) carboxylation (V-cmax) and electron transport (J(max)) at each treatment's respective T-growth and at a common measurement T (25 degrees C). SDS-PAGE gels were used to determine abundance of the CO2-fixing enzyme, Rubisco. Leaf chlorophyll, nitrogen (N) and mass per unit leaf area (LMA) were also determined. For all species and T-growth, An at current atmospheric CO2 partial pressure was Rubisco-limited. Across all species, LMA decreased with increasing T-growth. Similarly, area-based rates of Vcmax at a measurement T of 25 degrees C (V-cmax(25)) linearly declined with increasing T-growth, linked to a concomitant decline in total leaf protein per unit leaf area and Rubisco as a percentage of leaf N. The decline in Rubisco constrained Vcmax and An for leaves developed at higher T-growth and resulted in poor predictions of photosynthesis by currently widely used models that do not account for T-growth-mediated changes in Rubisco abundance that underpin the thermal acclimation response of photosynthesis in wet-forest tree species. A new model is proposed that accounts for the effect of T-growth-mediated declines in V-cmax(25) on An, complementing current photosynthetic thermal acclimation models that do not account for T sensitivity of V-cmax(25).
学科主题Biodiversity & Conservation ; Environmental Sciences & Ecology
资助项目Atkin, Owen/C-8415-2009 ; Evans, John/C-8424-2009
语种英语
资助机构This work was supported by the Overseas Foundation of the Chinese Academy of Sciences and National Natural Science Foundation of China (31000290, 31370594) and International Sci-tech Cooperation Program of China (2013DFR90670) to SX, and Australian Research Council support (FT0991448, DP0986823, DP1093759 and CE140100008 to OKA). ; Overseas Foundation of the Chinese Academy of Sciences ; This work was supported by the Overseas Foundation of the Chinese Academy of Sciences and National Natural Science Foundation of China (31000290, 31370594) and International Sci-tech Cooperation Program of China (2013DFR90670) to SX, and Australian Research Council support (FT0991448, DP0986823, DP1093759 and CE140100008 to OKA). ; Overseas Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China [31000290, 31370594] ; National Natural Science Foundation of China [31000290, 31370594] ; International Sci-tech Cooperation Program of China [2013DFR90670] ; International Sci-tech Cooperation Program of China [2013DFR90670] ; Australian Research Council [FT0991448, DP0986823, DP1093759, CE140100008] ; Australian Research Council [FT0991448, DP0986823, DP1093759, CE140100008] ; This work was supported by the Overseas Foundation of the Chinese Academy of Sciences and National Natural Science Foundation of China (31000290, 31370594) and International Sci-tech Cooperation Program of China (2013DFR90670) to SX, and Australian Research Council support (FT0991448, DP0986823, DP1093759 and CE140100008 to OKA). ; Overseas Foundation of the Chinese Academy of Sciences ; This work was supported by the Overseas Foundation of the Chinese Academy of Sciences and National Natural Science Foundation of China (31000290, 31370594) and International Sci-tech Cooperation Program of China (2013DFR90670) to SX, and Australian Research Council support (FT0991448, DP0986823, DP1093759 and CE140100008 to OKA). ; Overseas Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China [31000290, 31370594] ; National Natural Science Foundation of China [31000290, 31370594] ; International Sci-tech Cooperation Program of China [2013DFR90670] ; International Sci-tech Cooperation Program of China [2013DFR90670] ; Australian Research Council [FT0991448, DP0986823, DP1093759, CE140100008] ; Australian Research Council [FT0991448, DP0986823, DP1093759, CE140100008]
源URL[http://210.75.237.14/handle/351003/29124]  
专题成都生物研究所_生态研究
通讯作者Atkin, OK (reprint author), Australian Natl Univ, ARC Ctr Excellence Plant Energy Biol, Res Sch Biol, Bldg 134, Canberra, ACT 2601, Australia.
推荐引用方式
GB/T 7714		 Scafaro, AP,Xiang, S,Long, BM,et al. Strong thermal acclimation of photosynthesis in tropical and temperate wet-forest tree species: the importance of altered Rubisco content[J]. GLOBAL CHANGE BIOLOGY,2017,23(7):1-18.
APA Scafaro, AP.,Xiang, S.,Long, BM.,Bahar, NHA.,Weerasinghe, LK.,...&Atkin, OK .(2017).Strong thermal acclimation of photosynthesis in tropical and temperate wet-forest tree species: the importance of altered Rubisco content.GLOBAL CHANGE BIOLOGY,23(7),1-18.
MLA Scafaro, AP,et al."Strong thermal acclimation of photosynthesis in tropical and temperate wet-forest tree species: the importance of altered Rubisco content".GLOBAL CHANGE BIOLOGY 23.7(2017):1-18.

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来源：成都生物研究所

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