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ACTA HORTICULTURAE SINICA ›› 2018, Vol. 45 ›› Issue (1): 1-10.doi: 10.16420/j.issn.0513-353x.2017-0195

• Research Papers •     Next Articles

Primary Analysis of the Function of bZIP Transcription Factor Gene MdAREB2 in Apple

LIU Yajing,MA Qijun,LU Jing,HAO Yujin,and YOU Chunxiang*   

  1. State Key Laboratory of Crop Biology,Key Laboratory of Biology and Genetic Improvement of Horticultural Crops in Huanghuai Region, Ministry of Agriculture,College of Horticulture Science and Engineering,Shandong Agricultural University,Tai’an,Shandong 271018,China
  • Online:2018-01-25 Published:2018-01-25

Abstract: A bZIP transcription factor gene MdAREB2(MDP0000248567)was cloned from‘Gala’apple(Malus × domestica Borkh.). The evolutionary tree analysis indicated that MdAREB2 had the very high homology with AtAREB2. The promoter of MdAREB2 was analyzed and predicted by PlantCare databases,and the results showed that the promoter sequence contained abscisic acid response element ABRE. Quantitative real-time PCR showed that MdAREB2 was significantly induced by ABA. This study found that with 0.5 μmol · L-1 ABA and 2 μmol · L-1 ABA treatment,excessive expression of MdAREB2 in mutant abi5 could restore its sensitivity to ABA in seed germination stage. In the seedling growth stage,with 20 μmol · L-1 ABA treatment,excessive expression of MdAREB2 in mutant abi5 could partially restore its sensitivity to ABA.

Key words: apple, bZIP, transcription factor, MdAREB2, function analysis