Comparative Analysis of Chloroplasts and Mitochondria in Leaf Chlorenchyma from Mountain Plants Grown at Different Altitudes

Miroslavov, E. A.; Kravkina, I. M.

doi:10.1093/oxfordjournals.aob.a088244

Cited by 54 publications

(29 citation statements)

References 2 publications

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“…The acclimation of autotrophic respiration to elevated temperature has also been demonstrated (e.g., Kirshbaum and Farquhar 1984;Tjoelker et al 1999Tjoelker et al , 2001Atkin et al 2000a,b;Griffin et al 2002;Bolstad et al 2003), and has been attributed variously to decreased number of mitochondria (Miroslavov and Kravkina 1991), decreased respiratory capacity per mitochondria (Klikoff 1966), limitations in substrate supply (Lambers et al 1996), changes in the concentration of plant soluble sugars (Atkin et al 2000a), changes in demand for respiratory energy (Atkin and Lambers 1998), and/or changes in enzymatic capacity (Atkin et al 2002).…”

Section: Acclimationmentioning

confidence: 91%

From transient to steady-state response of ecosystems to atmospheric CO2-enrichment and global climate change: conceptual challenges and need for an integrated approach

Rustad

2006

Plant Ecol

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Evidence continues to accumulate that humans are significantly increasing atmospheric CO 2 concentrations, resulting in unprecedented changes in the global climate system. Experimental manipulations of terrestrial ecosystems and their components have greatly increased our understanding of short-term responses to these global perturbations and have provided valuable input to ecosystem, dynamic vegetation, and global scale models. However, concerns exist that these initial experimental responses may be transitory, thereby limiting our ability to extrapolate short-term experimental responses to infer longerterm effects. To do these extrapolations, it will be necessary to understand changes in response patterns over time, including alterations in the magnitude, direction, and rate of change of the responses. These issues represent one of our largest challenges in accurately predicting longer-term changes in ecosystems and associated feedbacks to the climate system. Key issues that need to be considered when designing future experiments or refining models include: linear vs. non-linear responses, direct vs. indirect effects, lags in response, acclimation, resource limitation, homeostasis, buffers, thresholds, ecosystem stoichiometry, turnover rates and times, and alterations in species composition. Although experimental and landscape evidence for these response patterns exist, extrapolating longer-term response patterns from short-term experiments will ultimately require a unified multidisciplinary approach, including better communication and collaboration between theoreticists, experimentalists and modelers.

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Section: Acclimationmentioning

confidence: 91%

From transient to steady-state response of ecosystems to atmospheric CO2-enrichment and global climate change: conceptual challenges and need for an integrated approach

Rustad

2006

Plant Ecol

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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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Comparative Analysis of Chloroplasts and Mitochondria in Leaf Chlorenchyma from Mountain Plants Grown at Different Altitudes

Cited by 54 publications

References 2 publications

From transient to steady-state response of ecosystems to atmospheric CO2-enrichment and global climate change: conceptual challenges and need for an integrated approach

From transient to steady-state response of ecosystems to atmospheric CO2-enrichment and global climate change: conceptual challenges and need for an integrated approach

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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