Temperature Dependence of the Oxidative Rates of Mitochondria in Danthonia intermedia, Penstemon davidsonii and Sitanion hystrix

Klikoff, Lionel G.

doi:10.1038/212529a0

Cited by 54 publications

(33 citation statements)

References 5 publications

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“…4; Atkin and Tjoelker 2003). Total respiratory capacity might be altered as a result of changes in the density of mitochondria (Miroslavov and Kravkina 1991) and / or amount of total protein invested in the respiratory chain (Klikoff 1966(Klikoff , 1968. Type II acclimation could be associated with changes in the relative amounts of particular enzymes (e.g.…”

Section: Overviewmentioning

confidence: 99%

The hot and the cold: unravelling the variable response of plant respiration to temperature

Atkin¹,

Bruhn

Hurry

et al. 2005

Functional Plant Biol.

441

410

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This paper is part of The Evans Review series, named for Dr Lloyd Evans. The series contains reviews that are critical,state-of-the-art evaluations that aim to advance our understanding, rather than being exhaustive compilations of information, and are written by invitation.Abstract. When predicting the effects of climate change, global carbon circulation models that include a positive feedback effect of climate warming on the carbon cycle often assume that (1) plant respiration increases exponentially with temperature (with a constant Q 10 ) and (2) that there is no acclimation of respiration to long-term changes in temperature. In this review, we show that these two assumptions are incorrect. While Q 10 does not respond systematically to elevated atmospheric CO 2 concentrations, other factors such as temperature, light, and water availability all have the potential to influence the temperature sensitivity of respiratory CO 2 efflux. Roots and leaves can also differ in their Q 10 values, as can upper and lower canopy leaves. The consequences of such variable Q 10 values need to be fully explored in carbon modelling. Here, we consider the extent of variability in the degree of thermal acclimation of respiration, and discuss in detail the biochemical mechanisms underpinning this variability; the response of respiration to long-term changes in temperature is highly dependent on the effect of temperature on plant development, and on interactive effects of temperature and other abiotic factors (e.g. irradiance, drought and nutrient availability). Rather than acclimating to the daily mean temperature, recent studies suggest that other components of the daily temperature regime can be important (e.g. daily minimum and / or night temperature).In some cases, acclimation may simply reflect a passive response to changes in respiratory substrate availability, whereas in others acclimation may be critical in helping plants grow and survive at contrasting temperatures. We also consider the impact of acclimation on the balance between respiration and photosynthesis; although environmental factors such as water availability can alter the balance between these two processes, the available data suggests that temperature-mediated differences in dark leaf respiration are closely linked to concomitant differences in leaf photosynthesis. We conclude by highlighting the need for a greater process-based understanding of thermal acclimation of respiration if we are to successfully predict future ecosystem CO 2 fluxes and potential feedbacks on atmospheric CO 2 concentrations.

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Section: Overviewmentioning

confidence: 99%

The hot and the cold: unravelling the variable response of plant respiration to temperature

Atkin¹,

Bruhn

Hurry

et al. 2005

Functional Plant Biol.

441

410

View full text Add to dashboard Cite

show abstract

“…For example, the capacities of individual mitochondria are often greater in cold-acclimated tissues (Klikoff, 1966(Klikoff, , 1968, as are the numbers of mitochondria (Miroslavov & Kravkina, 1991). Moreover, longterm exposure to low temperatures increases AOX protein levels in tobacco leaves and mung bean hypocotyls and leaves (Vanlerberghe & McIntosh, 1992 ;Gonza ' lez Meler et al, 1999).…”

Section:        mentioning

confidence: 99%

Response of root respiration to changes in temperature and its relevance to global warming

2000

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Global warming over the next century is likely to be associated with a change in the extent to which atmospheric and soil temperatures fluctuate, on both a daily and a seasonal basis. The average annual temperature of the Earth's surface is expected to increase, as is the frequency of hot days. In this review, we explore what effects short-term and long-term changes in temperature are likely to have on root respiratory metabolism, and what impacts such changes will have on daily, seasonal and annual CO # release by roots under field conditions. We demonstrate that Q "! values, and the degree of acclimation, differ between and within plant species. Changes in the temperature sensitivity of respiration with measuring temperature are highlighted. Temperature-dependent changes in adenylate control and substrate supply are likely to control the Q "! and degree of acclimation of root respiration. Limitations in respiration capacity are unlikely to control respiratory flux at most temperatures. The potential role of nonphosphorylating pathways such as the alternative oxidase in controlling Q "! values is highlighted. The possibility that potentially rapid changes in adenylate control might underlie the acclimation response (rather than slow changes in enzyme capacity) has implications for the total amount of CO # respired by roots daily and annually. Our modelling suggests that rapid acclimation will result in near-perfect homeostasis of respiration rates and minimize annual CO # release. However, annual CO # release increases substantially if the speed of full acclimation is lower. Our modelling exercise also shows that high Q "! values have the potential to increase daily and annual CO # release substantially, particularly if the frequency of hot days increases after global warming.

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“…4c in Smith and Dukes (2012). The mechanism of Type II acclimation of plant respiration is not fully understood to date, although many studies have presented evidence, such as changes in capacity per mitochondrion (Klikoff, 1966), differences in the number of mitochondria per unit area (Miroslavov and Kravkina, 1991), or changes in plant nitrogen and carbohydrate concentrations (Stockfors and Linder, 1998;Gunderson et al, 2000). These studies suggest that Type II acclimation is largely associated with temperature-mediated changes in respiratory capacity (Atkin and Tjoelker, 2003).…”

Section: Temperature Effects On Carbon Fluxesmentioning

confidence: 93%

Modelling temperature acclimation effects on the carbon dynamics of forest ecosystems in the conterminous United States

Chen¹,

Zhuang²

2013

Tellus B: Chemical and Physical Meteorology

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A B S T R A C TThe projected rise in temperature in the 21st century will alter forest ecosystem functioning and carbon dynamics. To date, the acclimation of plant photosynthesis to rising temperature has not been adequately considered in earth system models. Here we present a study on regional ecosystem carbon dynamics under future climate scenarios incorporating temperature acclimation effects into a large-scale ecosystem model, the terrestrial ecosystem model (TEM). We first incorporate a general formulation of the temperature acclimation of plant photosynthesis into TEM, and then apply the revised model to the forest ecosystems of the conterminous United States for the 21st century under the future Intergovernmental Panel on Climate Change (IPCC) Special Report on Emissions Scenarios (SRES) climate scenarios A1FI, A2, B1 and B2. We find that there are significant differences between the estimates of carbon dynamics from the previous and the revised models. The largest differences occur under the A1FI scenario, in which the model that considers acclimation effects predicts that the region will act as a carbon sink, and that cumulative carbon in the 21st century will be 35 Pg C higher than the estimates from the model that does not consider acclimation effects. Our results further indicate that in the region there are spatially different responses to temperature acclimation effects. This study suggests that terrestrial ecosystem models should take temperature acclimation effects into account so as to more accurately quantify ecosystem carbon dynamics at regional scales.

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Temperature Dependence of the Oxidative Rates of Mitochondria in Danthonia intermedia, Penstemon davidsonii and Sitanion hystrix

Cited by 54 publications

References 5 publications

The hot and the cold: unravelling the variable response of plant respiration to temperature

The hot and the cold: unravelling the variable response of plant respiration to temperature

Response of root respiration to changes in temperature and its relevance to global warming

Modelling temperature acclimation effects on the carbon dynamics of forest ecosystems in the conterminous United States

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