ArticlePlant physiology2007
Mitochondrial complex II Is essential for gametophyte development in Arabidopsis.
Article in Plant physiology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.
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47 citing papers in PubMed, 116 citations in OpenAlex.
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- Mitochondrial genomes do not appear to regulate flowering pattern/reproductive strategy inAoB PLANTS · 2022Article
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- Inactivation of mitochondrial complex I stimulates chloroplast ATPase in Physcomitrium patens.Plant physiology · 2021Article
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- The Arabidopsis EPlant molecular biology · 2019Article
- Deficiencies in the Mitochondrial Electron Transport Chain Affect Redox Poise and Resistance TowardFrontiers in plant science · 2019Article
- ArabidopsisPlant physiology · 2018Article
- An Assembly Factor Promotes Assembly of Flavinated SDH1 into the Succinate Dehydrogenase Complex.Plant physiology · 2018Article
- PROHIBITIN3 Forms Complexes with ISOCHORISMATE SYNTHASE1 to Regulate Stress-Induced Salicylic Acid Biosynthesis in Arabidopsis.Plant physiology · 2018Article
- Two SUMO Proteases SUMO PROTEASE RELATED TO FERTILITY1 and 2 Are Required for Fertility in Arabidopsis.Plant physiology · 2017Article
- Differentiated transcriptional signatures in the maize landraces of Chiapas, Mexico.BMC genomics · 2017Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
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 reduced seed set. In the progeny of selfed SDH1-1/sdh1-1 plants, distorted segregation ratios were observed, and no homozygous mutant plants were obtained. Reciprocal test crosses with the wild type demonstrated that the mutated sdh1-1 allele is not transmitted through the male gametophyte and is only partially transmitted through the female gametophyte. Consistently, microscopic analysis showed that mutant microspores develop normally until the vacuolated microspore stage, but fail to undergo mitosis I, and then cell structures are degraded and cell content disappears. On the other hand, half the mutant embryo sacs showed arrested development, either at the two-nucleate stage or before polar nuclei fusion. Down-regulation of SDH1-1 by RNA interference results in pollen abortion and a reduced seed set, as in the insertional mutant. Altogether, our results show that SDH1-1, and therefore complex II, are essential for gametophyte development.
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