Temperature Dependence of Mitochondrial Oxidative Rates of Several Plant Species of the Sierra Nevada

Klikoff, Lionel G.

doi:10.1086/336439

Cited by 32 publications

(15 citation statements)

References 14 publications

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“…Although not directly comparable, this finding is similar to the increases in dark respiration reported previously for cold-acclimated annuals (Steffen and Palta, 1989;Hurry et al, 1992) and alpine ecotypes (Mooney, 1963;Klikoff, 1968;Billings et al, 1971) measured in the dark as increased O, consumption. However, our results also show that the increase in oxidase decarboxylation of the end products in the dark was not associated with an increase in total decarboxylation in the light.…”

Section: Discussionsupporting

confidence: 90%

“…Plants from arctic and alpine regions typically exhibit higher rates of leaf dark respiration (Mooney, 1963;Klikoff, 1968;Billings et al, 1971) and photorespiration (Machler and Nosberger, 1978) at a given measurement temperature than their temperate or lowland relatives. Similarly, leaf dark respiration is higher at a given measurement temperature in cold-tolerant compared with cold-sensitive herbaceous plants following growth at low temperatures (Steffen and Palta, 1989;Hurry et al, 1992).…”

mentioning

confidence: 99%

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Effect of Cold Hardening on the Components of Respiratory Decarboxylation in the Light and in the Dark in Leaves of Winter Rye

et al. 1996

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In the dark, all decarboxylation reactions are associated with the oxidase reactions of mitochondrial electron transport. In the light, photorespiration is also active in photosynthetic cells. In winter rye (Secale cereale L.), cold hardening resulted in a 2-fold increase in the rate of dark respiratory CO2 release from leaves compared with nonhardened (NH) controls. However, in the light, NH and cold-hardened (CH) leaves had comparable rates of oxidase decarboxylation and total intracellular decarboxylation. Furthermore, whereas CH leaves showed similar rates of total oxidase decarboxylation in the dark and light, NH leaves showed a 2-fold increase in total oxidase activity in the light compared with the dark. Light suppressed oxidase decarboxylation of end products of photosynthesis 2-fold in NH leaves and 3-fold in CH leaves in air. However, in high-CO2, light did not suppress the oxidase decarboxylation of end products. Thus, the decrease in oxidase decarboxylation of end products observed in the light and in air reflected glycolate-cycle-related inhibition of tricarboxylic acid cycle activity. We also showed that the glycolate cycle was involved in the decarboxylation of the end products of photosynthesis in both NH and CH leaves, suggesting a flow of fixed carbon out of the starch pool in the light.

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Section: Discussionsupporting

confidence: 90%

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confidence: 99%

Effect of Cold Hardening on the Components of Respiratory Decarboxylation in the Light and in the Dark in Leaves of Winter Rye

et al. 1996

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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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“…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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Temperature Dependence of Mitochondrial Oxidative Rates of Several Plant Species of the Sierra Nevada

Cited by 32 publications

References 14 publications

Effect of Cold Hardening on the Components of Respiratory Decarboxylation in the Light and in the Dark in Leaves of Winter Rye

Effect of Cold Hardening on the Components of Respiratory Decarboxylation in the Light and in the Dark in Leaves of Winter Rye

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

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