The gene expression profiles of mitochondrial respiratory components in Arabidopsis plants with differing amounts of <i>ALTERNATIVE OXIDASE1a</i> under high intensity light

Гармаш, Е. В.; Belykh, Elena S.; Velegzhaninov, Ilya O.

doi:10.1080/15592324.2020.1864962

Cited by 9 publications

(38 citation statements)

References 64 publications

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Section: Transcriptional and Posttranscriptional Control Over Express...mentioning

confidence: 99%

“…We have analyzed promoters of all the AtAOX genes and showed common CAREs involved in formation of sensitivity to various stresses in all the genes [35,36]. G-box (CACGTG) is present in promoters of not only АОХ1а but also of АОХ2 [36]. Promoters of genes AOX1a, AOX1c, and AOX1d are enriched in such CAREs as MYB4-BSM (binding site motif), SORLEP3, SORLIP2, and CCA1-BSM, which points to a dependence of their expression on changes in operation of chlETC (chloroplast ETC) in the light.…”

Section: Transcriptional and Posttranscriptional Control Over Express...mentioning

confidence: 99%

“…The presence of common CAREs points to a complementary interaction between AtАОХ genes at a transcription level within a certain range of stress response. For instance, upon exposure to elevated physiological dose of UV-B and moderate illuminance (400 μmol/(m 2 s)), A. thaliana plants antisense by AOX1a showed a compensatory induction of other AOX genes' expression [35,36]. At the same time, the activity of AOX genes upon exposure to bright light was probably regulated via different signal pathways.…”

Section: Transcriptional and Posttranscriptional Control Over Express...mentioning

confidence: 99%

“…At the same time, the activity of AOX genes upon exposure to bright light was probably regulated via different signal pathways. This was suggested by the results of cluster analysis that made it possible to attribute AOX genes to different clusters depending on the character of their expression [36].…”

Section: Transcriptional and Posttranscriptional Control Over Express...mentioning

confidence: 99%

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Signal Pathways for Regulation of Plant Alternative Oxidase Genes’ Expression

Гармаш

2022

Russ J Plant Physiol

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This review deals with important issues in regulation of terminal alternative oxidase (AOX) of plant mitochondria, which are currently investigated and discussed. AOX ensures electron transport along the alternative nonphosphorylating cyanide-resistant pathway in mitochondrial ETC and plays an important role in the maintenance of redox balance in the cell and defense against stress. Principal results concerning AOX signaling were obtained in the works dealing with expression of the АОХ1а gene of Arabidopsis thaliana (AtAOX1a). Reports about АОХ expression in different plant species were analyzed. Mechanisms of transcriptional and posttranscriptional control over expression of АОХ genes were described. The role of some cis-regulatory elements of AtАОХ1а promoter and related transcription factors was considered. It was shown that transduction of the signal causing expression of АОХ genes may follow anterograde and retrograde pathways. Information about mitochondrial retrograde regulation of AOX and ROS-dependent and ROS-independent signal pathways of induction of АОХ expression is given. A hypothetic sequence of signal events of light induction of АОХ1а expression in wheat leaf cell in the course of greening was worked out. Interactions between AOX signaling and hormonal signal pathways, as well as induction of АОХ by the signals of plastid origin, were described. In conclusion, it was highlighted that AOX is integrated into the common signal pathway of the cell and acts as a target and a regulator of signal events.

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Section: Transcriptional and Posttranscriptional Control Over Express...mentioning

confidence: 99%

Section: Transcriptional and Posttranscriptional Control Over Express...mentioning

confidence: 99%

Section: Transcriptional and Posttranscriptional Control Over Express...mentioning

confidence: 99%

Section: Transcriptional and Posttranscriptional Control Over Express...mentioning

confidence: 99%

See 2 more Smart Citations

Signal Pathways for Regulation of Plant Alternative Oxidase Genes’ Expression

Гармаш

2022

Russ J Plant Physiol

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“…Similar plants also displayed higher rates of photosynthesis under both optimal and drought stress conditions (Barreto et al , 2017). Another study found that UCP1 transcript and protein were elevated in an Arabidopsis aox1a knockdown compared with WT following a short‐term high irradiance treatment (Garmash et al , 2021). Plants lacking Complex I also showed some disruption of photosynthetic activity or capacity that appears to relate to redox perturbations within the cell, including the chloroplast (Dutilleul et al , 2003; Fromm et al , 2016; Juszczuk et al , 2007; Sabar et al , 2000).…”

Section: Introductionmentioning

confidence: 99%

The flexibility of metabolic interactions between chloroplasts and mitochondria in Nicotiana tabacum leaf

Alber

Vanlerberghe

2021

The Plant Journal

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To examine the effect of mitochondrial function on photosynthesis, wild-type and transgenic Nicotiana tabacum with varying amounts of alternative oxidase (AOX) were treated with different respiratory inhibitors. Initially, each inhibitor increased the reduction state of the chloroplast electron transport chain, most severely in AOX knockdowns and least severely in AOX overexpressors. This indicated that the mitochondrion was a necessary sink for photo-generated reductant, contributing to the 'P700 oxidation capacity' of photosystem I. Initially, the Complex III inhibitor myxothiazol and the mitochondrial ATP synthase inhibitor oligomycin caused an increase in photosystem II regulated non-photochemical quenching not evident with the Complex III inhibitor antimycin A (AA). This indicated that the increased quenching depended upon AAsensitive cyclic electron transport (CET). Following 12 h with oligomycin, the reduction state of the chloroplast electron transport chain recovered in all plant lines. Recovery was associated with large increases in the protein amount of chloroplast ATP synthase and mitochondrial uncoupling protein. This increased the capacity for photophosphorylation in the absence of oxidative phosphorylation and enabled the mitochondrion to act again as a sink for photo-generated reductant. Comparing the AA and myxothiazol treatments at 12 h showed that CET optimized photosystem I quantum yield, depending upon the P700 oxidation capacity. When this capacity was too high, CET drew electrons away from other sinks, moderating the P700 + amount. When P700 oxidation capacity was too low, CET acted as an electron overflow, moderating the amount of reduced P700. This study reveals flexible chloroplast-mitochondrion interactions able to overcome lesions in energy metabolism.

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