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| BARRETO, P.; KOLTUN, A.; NONATO, J.; YASSITEPE, J. E. de C. T.; MAIA, I. de G.; ARRUDA, P.. |
| Abstract. 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... |
| Tipo: Artigo de periódico |
Palavras-chave: Sinalização retrógrada; Respiração alternativa; Proteínas de desacoplamento; Estresses abióticos; Sinalização de hipóxia; Melhoramento das colheitas; Desempenho da planta; Retrograde signaling; Alternative respiration; Uncoupling proteins; Abiotic stresses; Hypoxia signaling; Crop improvement; Plant performance; Arabidopsis thaliana; Abiotic stress. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1147749 |
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| BARRETO, P.; DAMBIRE, C.; SHARMA, G.; VICENTE, J.; OSBORNE, R.; YASSITEPE, J. E. de C. T.; GIBBS, D. J.; MAIA, I. G.; HOLDSWORTH, M. J.; ARRUDA, P.. |
| SUMMARY. Mitochondrial retrograde signaling is an important component of intracellular stress signaling in eukaryotes. UNCOUPLING PROTEIN (UCP)1 is an abundant plant inner-mitochondrial membrane protein with multiple functions including uncoupled respiration and amino-acid transport1,2 that influences broad abiotic stress responses. Although the mechanism(s) through which this retrograde function acts is unknown, overexpression of UCP1 activates expression of hypoxia (low oxygen)-associated nuclear genes.3,4 Here we show in Arabidopsis thaliana that UCP1 influences nuclear gene expression and physiological response by inhibiting the cytoplasmic PLANT CYSTEINE OXIDASE (PCO) branch of the PROTEOLYSIS (PRT)6 N-degron pathway, a major mechanism of oxygen and... |
| Tipo: Artigo de periódico |
Palavras-chave: Expressão gênica; Resposta fisiológica; Mitocôndria; Arabidopsis thaliana; Gene expression; Gene overexpression; Hypoxia. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1149731 |
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