Genome-wide Identification and Characterization of NAC Transcription Factor Family Members in Trifolium Pratense and Expression Analysis Under Lead Stress

Overview

Journal BMC Genomics

Publisher Biomed Central

Specialty Genetics

Date 2024 Jan 31

PMID 38297198

Authors

Zicheng Wang

Zirui Chen

Yuchen Wu

Meiqi Mu

Jingwen Jiang

Wanting Nie

Siwen Zhao

Guowen Cui

Xiujie Yin

Affiliations

Soon will be listed here.

Abstract

Background: The NAC TF family is widely involved in plant responses to various types of stress. Red clover (Trifolium pratense) is a high-quality legume, and the study of NAC genes in red clover has not been comprehensive. The aim of this study was to analyze the NAC gene family of red clover at the whole-genome level and explore its potential role in the Pb stress response.

Results: In this study, 72 TpNAC genes were identified from red clover; collinearity analysis showed that there were 5 pairs of large fragment replicators of TpNAC genes, and red clover was found to be closely related to Medicago truncatula. Interestingly, the TpNAC genes have more homologs in Arabidopsis thaliana than in soybean (Glycine max). There are many elements in the TpNAC genes promoters that respond to stress. Gene expression analysis showed that all the TpNAC genes responded to Pb stress. qRT-PCR showed that the expression levels of TpNAC29 and TpNAC42 were significantly decreased after Pb stress. Protein interaction network analysis showed that 21 TpNACs and 23 other genes participated in the interaction. In addition, the TpNAC proteins had three possible 3D structures, and the secondary structure of these proteins were mainly of other types. These results indicated that most TpNAC members were involved in the regulation of Pb stress in red clover.

Conclusion: These results suggest that most TpNAC members are involved in the regulation of Pb stress in red clover. TpNAC members play an important role in the response of red clover to Pb stress.

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