Comprehensive analysis of AHL gene family and their expression under drought stress and ABA treatment in Populus trichocarpa | Zendy

Hanzeng Wang | Zendy; Xue Leng | Zendy; Jiawei Yang | Zendy; Mengqiu Zhang | Zendy; Minzhen Zeng | Zendy; Xuemei Xu | Zendy; Fude Wang | Zendy; Chenghao Li | Zendy

Open Access

Comprehensive analysis of AHL gene family and their expression under drought stress and ABA treatment in Populus trichocarpa

Author(s) -

Hanzeng Wang,

Xue Leng,

Jiawei Yang,

Mengqiu Zhang,

Minzhen Zeng,

Xuemei Xu,

Fude Wang,

Chenghao Li

Publication year - 2021

Publication title -

peerj

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.927

H-Index - 70

ISSN - 2167-8359

DOI - 10.7717/peerj.10932

Subject(s) - populus trichocarpa , biology , gene , genetics , gene family , phylogenetic tree , transcription factor , gene expression , histone , drought tolerance , genome , botany

The AT-hook motif nuclear-localized (AHL) family is a plant transcription factor family, which plays an important role in growth and development and stress responses. We identified and analyzed 37 AHL genes in poplar ( Populus trichocarpa ). Phylogenetic analysis classified the PtrAHL members into three subfamilies based on their conserved domain. All PtrAHL paralogous pairs evolved under purifying selection. The promoter analysis revealed the presence of stress-related and phytohormone-related cis -elements of the PtrAHL genes. Our analysis of the tissue-specific expression pattern of PtrAHL genes indicated their significance in tissue and organ development. Network-based prediction suggested that PtrAHL genes may interact with histone deacetylases (HDAC) and participate in the development of organs, such as roots. Drought negatively impacts plant growth and development. ABA is produced under osmotic stress condition, and it takes an important part in the stress response and tolerance of plants. Real-time quantitative PCR (qRT-PCR) showed that PtrAHL genes were induced by drought stress and ABA treatment. These insights into the expression of PtrAHL genes under stress provide a basis for PtrAHL gene functional analysis. Our study will help develop new breeding strategies to improve drought tolerance in poplar.

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