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Characterization of a novel gene, BcMF7, that is expressed preferentially in pollen of Brassica campestris L. ssp. chinensis Makino

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Abstract

Pollen formation is important for plant sexual reproduction. To identify the genes that are involved in pollen formation, we performed the genome-wide transcriptional profiling in the flower buds of both male meiotic cytokinesis (mmc) mutant and its wild-type plants of Brassica campestris L. ssp. chinensis, syn. B. rapa L. ssp. chinensis. cDNA-amplified fragment length polymorphism (cDNA-AFLP) analysis showed that the mmc mutation resulted in changes in expression of a variety of genes. BcMF7, a transcript-derived fragment (TDF) accumulated in the wild-type flower buds was further characterized. The BcMF7 gene has 1161 bp in length with two introns. The full-length BcMF7 cDNA has 609 bp in length and encodes a protein of 129 amino acids. The deduced amino acid sequence of BcMF7 protein shares no similarity to any function-known protein in Swiss-Prot database, but has 8 protein kinase C phosphorylation sites, 2 caselin kinase II phosphorylation sites, 2 tyrosine kinase phosphorylation sites, 2 N-glycosylation sites and 2 N-myristolyation sites. Spatial and temporal expression patterns analysis showed that BcMF7 was expressed exclusively in pollen. The expression signal of BcMF7 was first detected at the tetrad stage of microspore development, reached a peak level at the uninucleate stage, and decreased to a slightly low level at the mature pollen stage. All these results show that BcMF7 may play a certain role in the signal transduction during pollen development.

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Authors and Affiliations

  1. Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310029, China

    Huang Li, Cao JiaShu, Zhang YuChao & Ye YiQun

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  1. Huang Li
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  2. Cao JiaShu
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  3. Zhang YuChao
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  4. Ye YiQun
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Correspondence to Cao JiaShu.

Additional information

Supported by the National Natural Science Foundation of China (Grant No. 30370975) and the Key Sci-technology Project of Zhejiang Province, China (Grant No. 2005C12019-02)

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Huang, L., Cao, J., Zhang, Y. et al. Characterization of a novel gene, BcMF7, that is expressed preferentially in pollen of Brassica campestris L. ssp. chinensis Makino. SCI CHINA SER C 50, 497–504 (2007). https://doi.org/10.1007/s11427-007-0056-7

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  • DOI: https://doi.org/10.1007/s11427-007-0056-7

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