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Characterization of the bZIP Transcription Factor Family in Pepper ( L.): Positively Modulates the Salt Tolerance. | LitMetric

AI Article Synopsis

  • * The bZIP genes are classified into 10 groups based on their genetic relationships, revealing distinct intron/exon structures and conserved motifs among them.
  • * Expression analysis indicates that many bZIP genes are activated by abiotic stresses and phytohormones, with some enhancing salt tolerance in pepper plants, particularly when overexpressed.

Article Abstract

The basic leucine zipper (bZIP) proteins compose a family of transcription factors (TFs), which play a crucial role in plant growth, development, and abiotic and biotic stress responses. However, no comprehensive analysis of bZIP family has been reported in pepper ( L.). In this study, we identified and characterized 60 bZIP TF-encoding genes from two pepper genomes. These genes were divided into 10 groups based on their phylogenetic relationships with genes from . Six introns/exons structural patterns within the basic and hinge regions and the conserved motifs were identified among all the pepper bZIP proteins, on the basis of which, we classify them into different subfamilies. Based on the transcriptomic data of Zunla-1 genome, expression analyses of 59 pepper genes (not including of CM334 genome), indicated that the pepper genes were differentially expressed in the pepper tissues and developmental stages, and many of the pepper genes might be involved in responses to various abiotic stresses and phytohormones. Further, gene expression analysis, using quantitative real-time PCR (qRT-PCR), showed that the gene was expressed at relatively higher levels in vegetative tissues, and was strongly induced by abiotic stresses and phytohormones. In comparing with wild type , germination rate, fresh weight, chlorophyll content, and root lengths increased in the overexpressing under salt stress. Additionally, silenced pepper showed lower chlorophyll content than the control plants under salt stress. These results suggested that improved salt tolerance in plants. Taken together, our results provide new opportunities for the functional characterization of bZIP TFs in pepper.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7054902PMC
http://dx.doi.org/10.3389/fpls.2020.00139DOI Listing

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