Assessing the relationship between respiratory acclimation to the cold and photosystem II redox poise in <i>Arabidopsis thaliana</i>

Armstrong, Anna F.; Wardlaw, Kristen D.; Atkin, Owen K.

doi:10.1111/j.1365-3040.2007.01738.x

Cited by 15 publications

(7 citation statements)

References 61 publications

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“…In contrast, Bolstad et al (1999) reported no consistent trend of Q 10 values with respect to canopy position. Similarly, no evidence of irradiance-mediated changes in the Q 10 leaf R dark have been found in recent studies using herbaceous plants, and deciduous and evergreen tree species where substrate concentrations remained similar in high and low-light grown plants (Hartley et al 2006;Armstrong et al 2007;Zaragoza-Castells et al 2007.…”

Section: Introductionmentioning

confidence: 77%

Transient shade and drought have divergent impacts on the temperature sensitivity of dark respiration in leaves of Geum urbanum

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Zaragoza‐Castells

Atkin

2008

Functional Plant Biol.

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The respiratory response of plants to temperature is a critical biotic feedback in the study of global climate change. Few studies, however, have investigated the effects of environmental stresses on the short-term temperature response of dark respiration (Rdark) at the leaf level. We investigated the effect of shade and transient drought on the temperature sensitivity (Q10; the proportional increase in respiration per 10°C increase in temperature) of Rdark of Geum urbanum L. in controlled experiments. Shade effects were most pronounced following sustained, near-darkness, when rates of leaf Rdark at a set measuring temperature (25°C) and the Q10 of Rdark were both reduced. By contrast, rates of leaf Rdark and the Q10 of Rdark both increased in response to the onset of severe water stress. Water stress was associated with a rapid (but reversible) decline in rates of light-saturated photosynthesis (Psat), stomatal closure (gs) and progressive wilting. Re-watering resulted in a rapid recovery of Psat, gs and a decline in the Q10 of Rdark (due to larger proportional reductions in the rate of Rdark measured at 25°C compared with those measured at 14°C). The concentration of soluble sugars in leaves did not decline during drought (5–7 day cycles) or shading, but during drought the starch concentration dropped, suggesting starch to sugar conversion helped to maintain homeostatic concentrations of soluble sugars. Thus, the drought and shade induced changes in Rdark were unlikely to be due to stress-induced changes in substrate supply. Collectively, the data highlight the dynamic responses of respiratory Q10 values to changes in water supply and sustained reductions in growth irradiance. If widespread, such changes in the Q10 of leaf respiration could have important implications for predicted rates of ecosystem carbon exchange in the future, particularly in areas that experience more frequent droughts.

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Section: Introductionmentioning

confidence: 77%

Transient shade and drought have divergent impacts on the temperature sensitivity of dark respiration in leaves of Geum urbanum

Slot

Zaragoza‐Castells

Atkin

2008

Functional Plant Biol.

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“…Growth under low temperatures often results in significant alterations in leaf morphology. The most noticeable effect is a reduction in specific leaf area (the ratio of leaf area to leaf dry mass) [25]. It is also remarkable that under cold conditions the leaves become thicker than those observed under control or high temperature (Fig.…”

Section: Resultsmentioning

confidence: 99%

Effect of temperature stress on the early vegetative development of Brassica oleracea L.

et al. 2015

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BackgroundDue to its biennual life cycle Brassica oleracea is especially exposed to seasonal changes in temperature that could limit its growth and fitness. Thermal stress could limit plant growth, leaf development and photosynthesis. We evaluated the performance of two local populations of B. oleracea: one population of cabbage (B. oleracea capitata group) and one population of kale (B. oleracea acephala group) under limiting low and high temperatures.ResultsThere were differences between crops and how they responded to high and low temperature stress. Low temperatures especially affect photosynthesis and fresh weight. Stomatal conductance and the leaf water content were dramatically reduced and plants produce smaller and thicker leaves. Under high temperatures there was a reduction of the weight that could be associated to a general impairment of the photosynthetic activity.ConclusionsAlthough high temperatures significantly reduced the dry weight of seedlings, in general terms, low temperature had a higher impact in B. oleracea physiology than high temperature. Interestingly, our results suggest that the capitata population is less sensitive to changes in air temperature than the acephala population.Electronic supplementary materialThe online version of this article (doi:10.1186/s12870-015-0535-0) contains supplementary material, which is available to authorized users.

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“…This result suggests that overall changes in respiratory capacity meant to modulate R L , and hence EP, also have some lasting influence on R D , as might be expected. A previous study found no compelling relationship between R D and EP ( R L was not examined), although in that study respiration was not being manipulated and, in fact, was relatively constant across the plant lines and growth conditions tested, which also did not include drought (Armstrong et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Alternative oxidase respiration maintains both mitochondrial and chloroplast function during drought

2016

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Summary The mitochondrial electron transport chain (ETC) terminates at cytochrome (cyt) oxidase or alternative oxidase (AOX). In Nicotiana tabacum leaves, mitochondrial respiration in the light (RL) declined with increasing drought severity but then increased under extreme drought, despite a steep decline in maximal cyt oxidase activity. This increased RL was absent in AOX knockdown lines, while AOX overexpression lines showed enhanced RL relative to the wild‐type (WT). Cyt oxidase activity under extreme drought was higher in overexpressors and lower in knockdowns, compared with the WT, providing evidence that AOX acted to maintain cyt pathway function. The rate of RL was a strong determinant of the reduction state of the photosynthetic ETC during drought. As such, the maximal quantum yield of photosystem II was compromised in knockdowns, compared with the WT, during extreme drought. By contrast, overexpressors maintained their instantaneous leaf water‐use efficiency equally as high during extreme drought as when they were well watered. In both mitochondria and chloroplasts, protein carbonyl accumulation during extreme drought was strongly increased in knockdowns, and decreased in overexpressors, relative to WT. Hence the ability of AOX to maintain critical mitochondrial and chloroplast functions during extreme drought is likely due, at least in part, to its ability to reduce oxidative damage.

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Assessing the relationship between respiratory acclimation to the cold and photosystem II redox poise in Arabidopsis thaliana

Cited by 15 publications

References 61 publications

Transient shade and drought have divergent impacts on the temperature sensitivity of dark respiration in leaves of Geum urbanum

Transient shade and drought have divergent impacts on the temperature sensitivity of dark respiration in leaves of Geum urbanum

Effect of temperature stress on the early vegetative development of Brassica oleracea L.

Alternative oxidase respiration maintains both mitochondrial and chloroplast function during drought

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