Chlororespiration and tolerance to drought, heat and high illumination

Ibáñez, Helena; Ballester, Almudena; Muñoz, Romualdo; Quiles, Marı́a José

doi:10.1016/j.jplph.2009.12.013

Cited by 67 publications

(26 citation statements)

References 52 publications

(64 reference statements)

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“…It is known that cyclic electron flow increases in response to high light intensity [10,33], and the physiological relevance of NDH-mediated electron flow in chloroplasts under stress conditions has also been reported [22,35,39,41,42,44,47–50]. However, the cooperation between these pathways remains unclear [33].…”

Section: Discussionmentioning

confidence: 99%

“…Recently, we described the increase in the NDH complex and PTOX in Spathiphyllum wallisii , a shade species very sensitive to heat and high illumination, when the above mentioned stresses were combined with water deficit [44]. Additionally, the involvement of the NDH-mediated cyclic electron pathways around PS I in supplying the extra adenosine triphosphate (ATP) required in conditions of mild water stress has been suggested [10].…”

Section: Introductionmentioning

confidence: 99%

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Water Deficit and Heat Affect the Tolerance to High Illumination in Hibiscus Plants

Muñoz

Quiles

2013

IJMS

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This work studies the effects of water deficit and heat, as well as the involvement of chlororespiration and the ferredoxin-mediated cyclic pathway, on the tolerance of photosynthesis to high light intensity in Hibiscus rosa-sinensis plants. Drought and heat resulted in the down–regulation of photosynthetic linear electron transport in the leaves, although only a slight decrease in variable fluorescence (Fv)/maximal fluorescence (Fm) was observed, indicating that the chloroplast was protected by mechanisms that dissipate excess excitation energy to prevent damage to the photosynthetic apparatus. The incubation of leaves from unstressed plants under high light intensity resulted in an increase of the activity of electron donation by nicotinamide adenine dinucleotide phosphate (NADPH) and ferredoxin to plastoquinone, but no increase was observed in plants exposed to water deficit, suggesting that cyclic electron transport was stimulated by high light only in control plants. In contrast, the activities of the chlororespiration enzymes (NADH dehydrogenase (NDH) complex and plastid terminal oxidase (PTOX)) increased after incubation under high light intensity in leaves of the water deficit plants, but not in control plants, suggesting that chlororespiration was stimulated in stressed plants. The results indicate that the relative importance of chlororespiration and the cyclic electron pathway in the tolerance of photosynthesis to high illumination differs under stress conditions. When plants were not subjected to stress, the contribution of chlororespiration to photosynthetic electron flow regulation was not relevant, and another pathway, such as the ferredoxin-mediated cyclic pathway, was more important. However, when plants were subjected to water deficit and heat, chlororespiration was probably essential.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Water Deficit and Heat Affect the Tolerance to High Illumination in Hibiscus Plants

Muñoz

Quiles

2013

IJMS

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“…Accumulation of the carotenoid zeaxanthin upon excess light from preexisting violaxanthin increases NPQ (11) and ROS scavenging (12). Strong illumination conditions was also reported to induce alternative pathways of electron transport, in particular cyclic electron flow of electrons around PSI (CEF) and the reduction of oxygen to water, mediated by the plastid alternative oxidase PTOX (13)(14)(15)(16)(17). Information available on acclimation behavior of green algae is somehow contrasting: Dunaliella salina and Dunaliella viridis were reported to undergo progressive reduction of the antenna size of both photosystems with increasing irradiance (18 -20) similar to the case of the diatom Skeletonema costatum (21).…”

mentioning

confidence: 99%

Acclimation of Chlamydomonas reinhardtii to Different Growth Irradiances

Bonente

Pippa

Castellano

et al. 2012

Journal of Biological Chemistry

187

165

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Background: Photosynthetic organisms deal with different irradiance conditions. Results: In Chlamydomonas reinhardtii, acclimation to different irradiances of growth involves modulation of photosynthetic protein content per cell. Growth in high light induces activation of photoprotective mechanisms. Conclusion: Higher plants and green algae have evolved different acclimatizing mechanisms. Significance: Investigation of light-dependent modulation of photosynthetic proteins is crucial for directing optimization of microalgal growth for biomass production.

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“…Thus, it is likely that AtLon4 is involved in ABA signaling or its regulation. Chloroplasts and mitochondria are vulnerable to environmental stresses, and disruptions of protein metabolism have been shown to occur in these organelles during drought stress [29][30][31][32][33]. Because AtLon4 is located in chloroplasts and mitochondria, it is possible that inactivation of AtLon4 results in accumulation of proteins that are detrimental to the functions of these organelles.…”

Section: Discussionmentioning

confidence: 99%

Increased sensitivity to drought stress in atlon4 Arabidopsis mutant

Sun

et al. 2010

Chin. Sci. Bull.

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The ATP-dependent serine protease Lon belongs to the AAA + superfamily, which is widely distributed in bacteria, archaea, and eukaryotic cells. Lon participates in the regulation of numerous physiological processes and gene expression via degrading various unstable and non-native regulators. In this study, we showed that the Arabidopsis atlon4 mutant is more sensitive to drought stress than wild-type plants. Compared with wild-type plants, atlon4 mutant plants showed increased water loss, decreased water use efficiency, and impaired stomatal closure in drought stress conditions. Arabidopsis, atlon4, drought stress, sensitivity Citation:Li X Y, Mu Y, Sun X W, et al. Increased sensitivity to drought stress in atlon4 Arabidopsis mutant.

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Chlororespiration and tolerance to drought, heat and high illumination

Cited by 67 publications

References 52 publications

Water Deficit and Heat Affect the Tolerance to High Illumination in Hibiscus Plants

Water Deficit and Heat Affect the Tolerance to High Illumination in Hibiscus Plants

Acclimation of Chlamydomonas reinhardtii to Different Growth Irradiances

Increased sensitivity to drought stress in atlon4 Arabidopsis mutant

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