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Isolation and characterization of CaMF3, an anther-specific gene in Capsicum annuum L.

Author(s): Xuefeng Hao | Changming Chen | Guoju Chen | Bihao Cao | Qinghua Chen | Jianjun Lei

Journal: Genetics and Molecular Biology
ISSN 1415-4757

Volume: 35;
Issue: 4;
Start page: 810;
Date: 2012;
Original page

Keywords: anther-specific | CaMF3 | Capsicum annuum L. genic male sterility | IAH1

Previous work on gene expression analysis based on RNA sequencing identified a variety of differentially expressed cDNA fragments in the genic male sterile-fertile line 114AB of Capsicum annuum L. In this work, we examined the accumulation of one of the transcript-derived fragments (TDFs), CaMF3 (male fertile 3), in the flower buds of a fertile line. The full genomic DNA sequence of CaMF3 was 1,951 bp long and contained 6 exons and 5 introns, with the complete sequence encoding a putative 25.89 kDa protein of 234 amino acids. The predicted protein of CaMF3 shared sequence similarity with members of the isoamyl acetate-hydrolyzing esterase (IAH1) protein family. CaMF3 expression was detected only in flower buds at stages 7 and 8 and in open flowers of a male fertile line; no expression was observed in any organs of a male sterile line. Fine expression analysis revealed that CaMF3 was expressed specifically in anthers of the fertile line. These results suggest that CaMF3 is an anther-specific gene that may be essential for anther or pollen development in C. annuum.

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