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Mitochondrial Transcription Termination Factor 27 Is Required for Salt Tolerance in Arabidopsis thaliana

State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan 430070, China
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Author to whom correspondence should be addressed.
Academic Editor: Jen-Tsung Chen
Int. J. Mol. Sci. 2021, 22(3), 1466; https://doi.org/10.3390/ijms22031466
Received: 14 December 2020 / Revised: 22 January 2021 / Accepted: 26 January 2021 / Published: 2 February 2021
(This article belongs to the Special Issue Cell Signaling in Model Plants 2.0)
In plants, mTERF proteins are primarily found in mitochondria and chloroplasts. Studies have identified several mTERF proteins that affect plant development, respond to abiotic stresses, and regulate organellar gene expression, but the functions and underlying mechanisms of plant mTERF proteins remain largely unknown. Here, we investigated the function of Arabidopsis mTERF27 using molecular genetic, cytological, and biochemical approaches. Arabidopsis mTERF27 had four mTERF motifs and was evolutionarily conserved from moss to higher plants. The phenotype of the mTERF27-knockout mutant mterf27 did not differ obviously from that of the wild-type under normal growth conditions but was hypersensitive to salt stress. mTERF27 was localized to the mitochondria, and the transcript levels of some mitochondrion-encoded genes were reduced in the mterf27 mutant. Importantly, loss of mTERF27 function led to developmental defects in the mitochondria under salt stress. Furthermore, mTERF27 formed homomers and directly interacted with multiple organellar RNA editing factor 8 (MORF8). Thus, our results indicated that mTERF27 is likely crucial for mitochondrial development under salt stress, and that this protein may be a member of the protein interaction network regulating mitochondrial gene expression. View Full-Text
Keywords: Arabidopsis; mTERF27; MORF8; salt stress; mitochondrial morphology Arabidopsis; mTERF27; MORF8; salt stress; mitochondrial morphology
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MDPI and ACS Style

Jiang, D.; Chen, J.; Zhang, Z.; Hou, X. Mitochondrial Transcription Termination Factor 27 Is Required for Salt Tolerance in Arabidopsis thaliana. Int. J. Mol. Sci. 2021, 22, 1466. https://doi.org/10.3390/ijms22031466

AMA Style

Jiang D, Chen J, Zhang Z, Hou X. Mitochondrial Transcription Termination Factor 27 Is Required for Salt Tolerance in Arabidopsis thaliana. International Journal of Molecular Sciences. 2021; 22(3):1466. https://doi.org/10.3390/ijms22031466

Chicago/Turabian Style

Jiang, Deyuan, Jian Chen, Zhihong Zhang, and Xin Hou. 2021. "Mitochondrial Transcription Termination Factor 27 Is Required for Salt Tolerance in Arabidopsis thaliana" International Journal of Molecular Sciences 22, no. 3: 1466. https://doi.org/10.3390/ijms22031466

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