Cold Treatment Induces Transient Mitochondrial Fragmentation in Arabidopsis thaliana in a Way that Requires DRP3A but not ELM1 or an ELM1-Like Homologue, ELM2

The number, size and shape of polymorphic plant mitochondria are determined at least partially by mitochondrial fission. Arabidopsis mitochondria divide through the actions of a dynamin-related protein, DRP3A. Another plant-specific factor, ELM1, was previously shown to localize DRP3A to mitochondri...

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Bibliographic Details
Published in:International journal of molecular sciences 2017-10, Vol.18 (10), p.2161
Main Authors: Arimura, Shin-Ichi, Kurisu, Rina, Sugaya, Hajime, Kadoya, Naoki, Tsutsumi, Nobuhiro
Format: Article
Language:English
Subjects:
Arabidopsis
Cold
Cold treatment
Cytosol
Dynamin
Fragmentation
Homology
Mitochondria
mitochondrial division
mitochondrial fission
Plant mitochondria
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Summary:The number, size and shape of polymorphic plant mitochondria are determined at least partially by mitochondrial fission. Arabidopsis mitochondria divide through the actions of a dynamin-related protein, DRP3A. Another plant-specific factor, ELM1, was previously shown to localize DRP3A to mitochondrial fission sites. Here, we report that mitochondrial fission is not completely blocked in the Arabidopsis mutant and that it is strongly manifested in response to cold treatment. Arabidopsis has an paralogue ( ) that seems to have only a limited role in mitochondrial fission in the mutant. Interestingly, cold-induced mitochondrial fragmentation was also observed in the wild-type, but not in a mutant, suggesting that cold-induced transient mitochondrial fragmentation requires DRP3A but not ELM1 or ELM2. DRP3A: GFP localized from the cytosol to mitochondrial fission sites without ELM1 after cold treatment. Together, these results suggest that Arabidopsis has a novel, cold-induced type of mitochondrial fission in which DRP3A localizes to mitochondrial fission sites without the involvement of ELM1 or ELM2.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms18102161