Journal
JOURNAL OF PLANT GROWTH REGULATION
Volume 41, Issue 3, Pages 1065-1078Publisher
SPRINGER
DOI: 10.1007/s00344-021-10364-9
Keywords
Histone acetyltransferases; Histone deacetylases; Gene expression; Drought stress; Wheat
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Funding
- National Key Research and Development Program of China [2017YFD0300408]
- Natural Science Foundation of Henan Province [212300410352]
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Histone acetyltransferases (HATs) and histone deacetylases (HDACs) play important roles in plant growth, development, and stress responses. This study identified 30 TaHAT genes and 53 TaHDAC genes in the wheat genome, classified into different subfamilies and showed similarities and differences compared to Arabidopsis and rice. Stress-related cis-regulatory elements were found in the promoter regions of these genes, and potential genes regulating drought stress in wheat were identified through comparative expression analyses of different varieties.
Histone acetyltransferases (HATs) and histone deacetylases (HDACs) contribute to plant growth, development, and stress responses. A number of HAT and HDAC genes have been identified in several plants. However, wheat HATs and HDACs have not been comprehensively characterized. In this study, 30 TaHAT genes and 53 TaHDAC genes were detected in the wheat genome. As described in other plants, TaHATs were classified into four subfamilies (i.e., GNAT, p300/CBP, MYST, and TAFII250) and TaHDACs were divided into three subfamilies (i.e., RPD3/HDA1, HD2, and SIR2). Phylogenetic and conserved domain analyses showed that TaHATs and TaHDACs are highly similar to those in Arabidopsis and rice; however, divergence and expansion from Arabidopsis and rice were also observed. We detected many stress-related cis-regulatory elements in the promoter regions of these genes (i.e., ABRE, STRE, MYB, etc.). Further, based on a comparative expression analyses of three varieties with different degrees of drought resistance under drought stress, we found that TaHAG2, TaHAG3, TaHAC2, TaHDA18, TaHDT1, and TaHDT2 are likely regulate drought stress in wheat.
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