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Home > Archive>Volume 21, Issue 1, 2020 >174-191. DOI:10.13430/j.cnki.jpgr.20190324001
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Genome-wide Identification and Expression Analysis of bZIP Gene Family under Drought Stress in Peanut
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North China Key Laboratory for Crop Germplasm Resources of Education Ministry / Laboratory for Crop Germplasm Resources of Hebei / College of Agronomy, Hebei Agricultural University

Fund Project:

Special Fund for Modern Agroindustry Technology Research System of China (CARS-13); National Natural Science Foundation of China (31701459); Natural Science Foundation of Hebei province (C2017204101); Science and Technology R&D Program of Hebei province (16226301D); Supported by the Earmarked Fund for Hebei Oil crop Innovation Team of Modern Agro-industry Technology Research System (HBCT2018090202)

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    Abstract:

    In the present study, 112 bZIP transcription factors were identified from the reference genome of wild diploid peanut, including 55 and 57 family members on AA and BB genome, respectively. All the members were named AradubZIP1-AradubZIP55 and AraipbZIP1-AraipbZIP57. The gene structure, conservative motif, physiochemical properties were predicted through bioinformatics methods. Furthermore, the phylogenetic relationship of bZIP family members was analyzed between peanuts and Arabidopsis, and the subcellular localization was predicted in plant cells. To understand the biological function of these genes under drought stress, the transcriptional profiles of thirty-two members were analyzed by use of the transcriptome sequencing data of peanuts leaves at the late growth stage in a tetraploid peanut L422. The results indicated that the bZIP members in wild diploids were assigned into 10 chromosomes on AA and BB genomes, respectively. Most of them were localized to the nucleus (36 members in AA genome, 39 members in BB genome), and few of them were localized to chloroplasts (14 and 15) and mitochondria (4 and 3). Meanwhile, 25 members with similar gene structure/motif were found on two diploid peanut genome, respectively. The number of exons were variable, for instance that up to 15 exons was found in AraipbZIP5, and one exon was found in 12 bZIP genes. Furthermore, the peanut bZIPs were divided into 14 subgroups (A-M and S). Among these, seven members of tetraploid bZIPs were classified into the I subgroup. Finally, the transcriptional profiles of 32 tetraploid bZIP genes under drought stress treatment were divided into 4 categories, I) the early and late period were higher than the medium period, II) the middle and late period were higher than the early period, III) the early and medium period were higher than the late period, and Ⅳ) the middle period was higher than the early and late period. These results provided a useful reference for understanding the function of bZIP gene family members under the drought stress treatment at the late growth stage in peanut.

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History
  • Received:March 24,2019
  • Revised:June 03,2019
  • Adopted:July 08,2019
  • Online: January 17,2020
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