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Huang Q.-N.,State Key Laboratory of Rice BiologyChina National Rice Research InstituteHangzhou310006China | Shi Y.-F.,State Key Laboratory of Rice BiologyChina National Rice Research InstituteHangzhou310006China | Zhang X.-B.,State Key Laboratory of Rice BiologyChina National Rice Research InstituteHangzhou310006China | Feng B.-H.,State Key Laboratory of Rice BiologyChina National Rice Research InstituteHangzhou310006China | And 5 more authors.
Journal of Integrative Plant Biology | Year: 2015

A premature senescence and death 128 (psd128) mutant was isolated from an ethyl methane sulfonate-induced rice IR64 mutant bank. The premature senescence phenotype appeared at the six-leaf stage and the plant died at the early heading stage. psd128 exhibited impaired chloroplast development with significantly reduced photosynthetic ability, chlorophyll and carotenoid contents, root vigor, soluble protein content and increased malonaldehyde content. Furthermore, the expression of senescence-related genes was significantly altered in psd128. The mutant trait was controlled by a single recessive nuclear gene. Using map-based strategy, the mutation Oryza sativa cell division cycle 48 (OsCDC48) was isolated and predicted to encode a putative AAA-type ATPase with 809 amino-acid residuals. A single base substitution at position C2347T in psd128 resulted in a premature stop codon. Functional complementation could rescue the mutant phenotype. © 2015 The Authors. Source

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