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Review

Metabolism and Signaling of Plant Mitochondria in Adaptation to Environmental Stresses

1
Departamento de Ciências Químicas e Biológicas, Instituto de Biociências, Universidade Estadual Paulista, Botucatu 18618-970, Brazil
2
Genomics for Climate Change Research Center, Universidade Estadual de Campinas, Campinas 13083-875, Brazil
3
Departamento de Genética e Evolução, Instituto de Biologia, Universidade Estadual de Campinas, Campinas 13083-862, Brazil
4
Embrapa Agricultura Digital, Campinas 13083-886, Brazil
5
Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas, Campinas 13083-875, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Abir U. Igamberdiev
Int. J. Mol. Sci. 2022, 23(19), 11176; https://doi.org/10.3390/ijms231911176
Received: 31 July 2022 / Revised: 29 August 2022 / Accepted: 2 September 2022 / Published: 23 September 2022
(This article belongs to the Special Issue State-of-the-Art Molecular Plant Sciences in Brazil)
The interaction of mitochondria with cellular components evolved differently in plants and mammals; in plants, the organelle contains proteins such as ALTERNATIVE OXIDASES (AOXs), which, in conjunction with internal and external ALTERNATIVE NAD(P)H DEHYDROGENASES, allow canonical oxidative phosphorylation (OXPHOS) to be bypassed. Plant mitochondria also contain UNCOUPLING PROTEINS (UCPs) that bypass OXPHOS. Recent work revealed that OXPHOS bypass performed by AOXs and UCPs is linked with new mechanisms of mitochondrial retrograde signaling. AOX is functionally associated with the NO APICAL MERISTEM transcription factors, which mediate mitochondrial retrograde signaling, while UCP1 can regulate the plant oxygen-sensing mechanism via the PRT6 N-Degron. Here, we discuss the crosstalk or the independent action of AOXs and UCPs on mitochondrial retrograde signaling associated with abiotic stress responses. We also discuss how mitochondrial function and retrograde signaling mechanisms affect chloroplast function. Additionally, we discuss how mitochondrial inner membrane transporters can mediate mitochondrial communication with other organelles. Lastly, we review how mitochondrial metabolism can be used to improve crop resilience to environmental stresses. In this respect, we particularly focus on the contribution of Brazilian research groups to advances in the topic of mitochondrial metabolism and signaling. View Full-Text
Keywords: Arabidopsis thaliana; retrograde signaling; alternative respiration; uncoupling proteins; abiotic stresses; hypoxia signaling; crop improvement; plant performance Arabidopsis thaliana; retrograde signaling; alternative respiration; uncoupling proteins; abiotic stresses; hypoxia signaling; crop improvement; plant performance
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MDPI and ACS Style

Barreto, P.; Koltun, A.; Nonato, J.; Yassitepe, J.; Maia, I.d.G.; Arruda, P. Metabolism and Signaling of Plant Mitochondria in Adaptation to Environmental Stresses. Int. J. Mol. Sci. 2022, 23, 11176. https://doi.org/10.3390/ijms231911176

AMA Style

Barreto P, Koltun A, Nonato J, Yassitepe J, Maia IdG, Arruda P. Metabolism and Signaling of Plant Mitochondria in Adaptation to Environmental Stresses. International Journal of Molecular Sciences. 2022; 23(19):11176. https://doi.org/10.3390/ijms231911176

Chicago/Turabian Style

Barreto, Pedro, Alessandra Koltun, Juliana Nonato, Juliana Yassitepe, Ivan de Godoy Maia, and Paulo Arruda. 2022. "Metabolism and Signaling of Plant Mitochondria in Adaptation to Environmental Stresses" International Journal of Molecular Sciences 23, no. 19: 11176. https://doi.org/10.3390/ijms231911176

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