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Article: Mitochondrial Complex II Is Essential for Gametophyte Development in Arabidopsis1[W][OA]
- Article from:
- Plant Physiology
- Article date:
- April 1, 2007
- Author:
CopyrightCopyright American Society of Plant Physiologists Apr 2007. Provided by ProQuest LLC. (Hide copyright information)
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Mitochondrial complex II (succinate dehydrogenase [SDH]) is part of the tricarboxylic acid cycle and the respiratory electron transport chain. Its flavoprotein subunit is encoded by two nuclear genes, SDH1-1 and SDH1-2, in Arabidopsis (Arabidopsis thaliana). The SDH1-2 gene is significantly expressed only in roots, albeit at very low level, and its disruption has no effect on growth and development of homozygous mutant plants. In contrast, SDH1-1 transcripts are ubiquitously expressed, with highest expression in flowers. Disruption of the SDH1-1 gene results in alterations in gametophyte development. Indeed, heterozygous SDH1-1/sdh1-1 mutant plants showed normal vegetative growth, yet a ...