Document Detail

Mitochondrial fusion, division and positioning in plants.
MedLine Citation:
PMID:  20491666     Owner:  NLM     Status:  MEDLINE    
Mitochondria are involved in many fundamental processes underpinning plant growth, development and death. Owing to their multiple roles, as the sites of the tricarboxylic acid cycle and oxidative phosphorylation, as harbourers of their own genomes and as sensors of cell redox status, amongst others, mitochondria are in a unique position to act as sentinels of cell physiology. The plant chondriome is typically organized as a population of physically discrete organelles, but visualization of mitochondria in living tissues has shown that the mitochondrial population is highly interactive. Mitochondria are highly motile and movement on the cytoskeleton ensures that the physically discrete organelles come into contact with one another, which allows transient fusion, followed by division of the mitochondrial membranes. This article serves to review our current knowledge of mitochondrial fusion and division, and link this to recent discoveries regarding a putative mitochondrial 'health-check' and repair process, whereby non-repairable dysfunctional mitochondria can be removed from the chondriome. It is proposed that the unequal distribution of the multipartite plant mitochondrial genome between discrete organelles provides the driver for transient mitochondrial fusion that, in turn, is dependent on mitochondrial motility, and that both fusion and motility are necessary to maintain a healthy functional chondriome.
David C Logan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Biochemical Society transactions     Volume:  38     ISSN:  1470-8752     ISO Abbreviation:  Biochem. Soc. Trans.     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-05-24     Completed Date:  2010-08-17     Revised Date:  2012-06-19    
Medline Journal Info:
Nlm Unique ID:  7506897     Medline TA:  Biochem Soc Trans     Country:  England    
Other Details:
Languages:  eng     Pagination:  789-95     Citation Subset:  IM    
Department of Biology, W.P. Thompson Building, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada.
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MeSH Terms
Cytoskeleton / metabolism
Dynamins / genetics,  metabolism
Genome, Mitochondrial
Membrane Fusion / physiology*
Mitochondria* / physiology,  ultrastructure
Mitochondrial Proteins / genetics,  metabolism
Plant Cells*
Plant Proteins / genetics,  metabolism
Plants / metabolism
Protein Kinases / genetics,  metabolism
Ubiquitin-Protein Ligases / genetics,  metabolism
Reg. No./Substance:
0/Mitochondrial Proteins; 0/Plant Proteins; EC 2.7.-/Protein Kinases; EC putative kinase; EC; EC Ligases; EC protein

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