Genome-Wide Analysis of HSP70s in Hexaploid Wheat: Tandem Duplication, Heat Response, and Regulation

Overview

Journal Cells

Publisher MDPI

Specialties Biochemistry
Biophysics
Cell Biology
Molecular Biology

Date 2022 Mar 10

PMID 35269442

Authors

Yunze Lu

Peng Zhao

Aihua Zhang

Junzhe Wang

Mingran Ha

Affiliations

Soon will be listed here.

Abstract

play crucial roles in plant growth and development, as well as in stress response. Knowledge of the distribution and heat response of is important to understand heat adaptation and facilitate thermotolerance improvement in wheat. In this study, we comprehensively analyzed the distribution of in hexaploid wheat () and its relatives, and we found an obvious expansion of in the D genome of hexaploid wheat. Meanwhile, a large portion of tandem duplication events occurred in hexaploid wheat. Among the 84 identified , more than 64% were present as homeologs. The expression profiles of in triads tended to be expressed more in non-stressful and heat stress conditions. Intriguingly, many were especially heat responsive. Tandem duplicated also participated in heat response and growth development. Further HSE analysis revealed divergent distribution of HSEs in the promoter regions of homeologs, which suggested a distinct heat regulatory mechanism. Our results indicated that the heat response of may experience a different regulation, and this regulation, together with the expression of tandem duplicated , may help hexaploid wheat to adapt to heat conditions.

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