Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13936 |
Macromolecular rate theory (MMRT) provides a thermodynamics rationale to underpin the convergent temperature response in plant leaf respiration | |
Liang, Liyin L.1; 39;Sullivan, Odhran S.2 | |
2018-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:4页码:1538-1547 |
文章类型 | Article |
语种 | 英语 |
国家 | New Zealand; Australia; USA; Sri Lanka |
英文摘要 | Temperature is a crucial factor in determining the rates of ecosystem processes, for example, leaf respiration (R) - the flux of plant respired CO2 from leaves to the atmosphere. Generally, R increases exponentially with temperature and formulations such as the Arrhenius equationare widely used in earth system models. However, experimental observations have shown a consequential and consistent departure from an exponential increase in R. What are the principles that underlie these observed patterns? Here, we demonstrate that macromolecular rate theory (MMRT), based on transition state theory (TST) for enzyme-catalyzed kinetics, provides a thermodynamic explanation for the observed departure and the convergent temperature response of R using a global database. Three meaningful parameters emerge from MMRT analysis: the temperature at which the rate of respiration would theoretically reach a maximum (the optimum temperature, T-opt), the temperature at which the respiration rate is most sensitive to changes in temperature (the inflection temperature, T-inf) and the overall curvature of the log(rate) versus temperature plot (the change in heat capacity for the system, Delta C-P(double dagger)). On average, the highest potential enzyme-catalyzed rates of respiratory enzymes for R are predicted to occur at 67.0 +/- 1.2 degrees C and the maximum temperature sensitivity at 41.4 +/- 0.7 degrees C from MMRT. The average curvature (average negative Delta C-P(double dagger) was -1.2 +/- 0.1 kJ mol(-1) K-1. Interestingly, T-opt, T-inf and Delta C-P(double dagger) appear insignificantly different across biomes and plant functional types, suggesting that thermal response of respiratory enzymes in leaves could be conserved. The derived parameters from MMRT can serve as thermal traits for plant leaves that represent the collective temperature response of metabolic respiratory enzymes and could be useful to understand regulations of R under a warmer climate. MMRT extends the classic TST to enzyme-catalyzed reactions and provides an accurate and mechanistic model for the short-term temperature response of R around the globe. |
英文关键词 | Arrhenius climate change heat capacity leaf respiration macromolecular rate theory temperature response thermodynamics |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426504400010 |
WOS关键词 | THERMAL-ACCLIMATION ; HEAT-CAPACITY ; PHOTOSYNTHESIS ; SENSITIVITY ; DEPENDENCE ; PARAMETERS ; CLIMATE ; GROWTH ; LIMITS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17044 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Waikato, Sch Sci, Hamilton, New Zealand; 2.Australian Natl Univ, Res Sch Biol, Div Plant Sci, Canberra, ACT, Australia; 3.Marine Biol Lab, Ecosyst Ctr, Woods Hole, MA 02543 USA; 4.Univ Peradeniya, Fac Agr, Peradeniya, Sri Lanka; 5.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia; 6.Australian Natl Univ, Res Sch Biol, ARC Ctr Excellence Plant Energy Biol, Canberra, ACT, Australia |
推荐引用方式 GB/T 7714 | Liang, Liyin L.,39;Sullivan, Odhran S.. Macromolecular rate theory (MMRT) provides a thermodynamics rationale to underpin the convergent temperature response in plant leaf respiration[J]. GLOBAL CHANGE BIOLOGY,2018,24(4):1538-1547. |
APA | Liang, Liyin L.,&39;Sullivan, Odhran S..(2018).Macromolecular rate theory (MMRT) provides a thermodynamics rationale to underpin the convergent temperature response in plant leaf respiration.GLOBAL CHANGE BIOLOGY,24(4),1538-1547. |
MLA | Liang, Liyin L.,et al."Macromolecular rate theory (MMRT) provides a thermodynamics rationale to underpin the convergent temperature response in plant leaf respiration".GLOBAL CHANGE BIOLOGY 24.4(2018):1538-1547. |
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