Abstract:
:Plant cytoplasmic male sterility (CMS) results from incompatibilities between the organellar and nuclear genomes and prevents self pollination, enabling hybrid crop breeding to increase yields. The Wild Abortive CMS (CMS-WA) has been exploited in the majority of 'three-line' hybrid rice production since the 1970s, but the molecular basis of this trait remains unknown. Here we report that a new mitochondrial gene, WA352, which originated recently in wild rice, confers CMS-WA because the protein it encodes interacts with the nuclear-encoded mitochondrial protein COX11. In CMS-WA lines, WA352 accumulates preferentially in the anther tapetum, thereby inhibiting COX11 function in peroxide metabolism and triggering premature tapetal programmed cell death and consequent pollen abortion. WA352-induced sterility can be suppressed by two restorer-of-fertility (Rf) genes, suggesting the existence of different mechanisms to counteract deleterious cytoplasmic factors. Thus, CMS-related cytoplasmic-nuclear incompatibility is driven by a detrimental interaction between a newly evolved mitochondrial gene and a conserved, essential nuclear gene.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Luo D,Xu H,Liu Z,Guo J,Li H,Chen L,Fang C,Zhang Q,Bai M,Yao N,Wu H,Wu H,Ji C,Zheng H,Chen Y,Ye S,Li X,Zhao X,Li R,Liu YGdoi
10.1038/ng.2570subject
Has Abstractpub_date
2013-05-01 00:00:00pages
573-7issue
5eissn
1061-4036issn
1546-1718pii
ng.2570journal_volume
45pub_type
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