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Home > Archive>Volume 20, Issue 5, 2019 >1301-1308. DOI:10.13430/j.cnki.jpgr.20181210003
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SbSBP5 is Involved in Response to Drought Stress in Sorghum
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1Dryland Agriculture Research Center, Shanxi Academy of Agricultural Sciences/National local joint engineering laboratory of water-saving techniques for dry farming in the eastern Loess Plateau/ Organic dry farming of Shanxi Province key laboratory, Taiyuan 030031;2Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau, Ministry of Agriculture, Taiyuan 030031;3Sorghum Institute of Shanxi Academy of Agricultural Sciences, Jinzhong 030600

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Foundation project：the Optional Project of Advantage Research Group of Shanxi Academy of Agricultural Sciences (YYS1705)；Organic dry farming of Shanxi Province key laboratory(201805D111015)；the Key Program of KeySResearch and Development Projects of Shanxi province(201703D211010)；Characteristic Agricultural Science and Technique Foundation of Shanxi Academy of Agricultural Sciences(YGG17016)

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    Abstract:

    SQUAMOSA PROMOTER BINDING PROTEIN-box (SBP-box) genes, that belong to plant-specific transcription factors, are involved in many important aspects including leaf?development, embryogenesis, vegetative and?reproductive?phase transitions. This family has important practical application in crop genetic improvement. In this study, we isolated a sorghum SBP-box gene named SbSBP5, and conducted the sequence analysis and the transcriptional pattern under different biotic stresses. SbSBP5 coded for a polypeptide of amino acids that contained a typical SBP domain. By analyzing the promoter sequence, several stress-related cis-elements including MBRE, ARE and MBS were detected. Twelve and 11-fold up-regulation of SbSBP5 was detected by PEG-directed drought treatment or applying exogenous abscisic acid. In transgenic Arabidopsis that expressed SbSBP5 promoter plus a GUS reporter, three and four fold of GUS activity were detected under drought or exogenous abscisic acid treatments, respectively. Thus, these results provided preliminary outcome of SbSBP5 responding to drought and exogenous abscisic acid, which might provide a basis for further unlocking its molecular function.

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History
  • Received:December 10,2018
  • Revised:December 25,2018
  • Adopted:January 03,2019
  • Online: September 17,2019
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