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Acta Agron Sin ›› 2017, Vol. 43 ›› Issue (10): 1458-1467.doi: 10.3724/SP.J.1006.2017.01458

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS • Previous Articles     Next Articles

Isolation, Expression and Binding Function Analysis of the Transcription Factor GmMYB52 in Soybean

XU Ling**,WANG Yuan-Cong**,HE Xiao-Lan,HUANG Yi-Hong,XU Zhao-Long,SHAO Hong-Bo*,ZHANG Da-Yong*   

  1. Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences / Salt-soil Agricultural Research Center, Nanjing 210014, China
  • Received:2017-02-08 Revised:2017-04-20 Online:2017-10-12 Published:2017-05-11
  • Contact: 张大勇, E-mail: cotton.z@126.com, Tel: 025-84391105; 邵宏波, E-mail: shaohongbochu@126.com E-mail:xuling@jaas.ac.cn

Abstract:

The MYB type transcription factors are involved in plant development and response to abiotic stress. GmMYB52 was significantly up-regulated after salt treatment. In order to gain more information about GmMYB52, GmMYB52 of Williams 82 was cloned by RT-PCR. Bioinformatic analysis showed the CDS of GmMYB52 was 1083bp, encoding 360 amino acid residues. A MYB domain was found in the region of 110 to 160 amino acid residues from N-terminal. Blast results showed that GmMYB52 that highly homologous to are GmMYB62, AtMYBSt1 from Arabidopsis, MtMYB52 from Medicago sativa, OsMYBS3 from Oryza sativa and CcMYB-like protein J from Cajanus Cajan. Quantitative PCR (qPCR) results indicated that the transcription level of GmMYB52 was upregulated under ABA and low temperature stresses, under salt, drought and cold stresses, show a bimodal pattern. GmMYB52 was nearly expressed in all detected tissues, except in pods at maturing stage, and its expression level was relatively higher at seedling or flowering stages than at maturing stage. The transcription level of GmMYB52 was high in stem, leaf, and flower, during seedling and blooming stages, and low in root and pods during maturity stage. Subcellular localization results showed that GmMYB52 was located in the nucleus which is in agreement with the localization characteristics of typical transcription factors. Yeast hybrid assay indicated that GmMYB52 had transcriptional activation functions and could bind to several MYB cis-acting element motifs. In conclusion GmMYB52is a typical 1R-MYB transcription factor, and able to bind MYB cis-acting element motifs. We speculate GmMYB52 is involved in response to the abiotic stress and ABA signal transduction pathway.

Key words: Soybean, GmMYB52, Expression analysis, MYB motif, Transcriptional activation activity

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