NAC is one of the largest family of plant-specific transcription factors, and it plays important roles in plant development and stress responses. The study identified 72 LpNACs genes from the perennial ryegrass genome database. Gene length, MW and pI of NAC family transcription factors varied, but the gene structure and motifs were relatively conserved in bioinformatics analysis. Phylogenetic analyses of perennial ryegrass, rice and Arabidopsis were performed to study the evolutionary and functional relationships in various species. The expression of LpNAC genes that respond to various abiotic stresses including high salinity, ABA, high temperature, polyethylene glycol (PEG) and heavy metal was comprehensively analyzed. The present study provides a basic understanding of the NAC gene family in perennial ryegrass for further abiotic stress studies and improvements in breeding.
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| http://dx.doi.org/10.1016/j.ygeno.2020.06.033 | DOI Listing |
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Article Synopsis
- Perennial ryegrass exhibits varying levels of salt tolerance, with genotype P1 identified as salt-sensitive and genotype P2 as salt-tolerant when exposed to 200 mM NaCl.
- Through transcriptomics and metabolomics analyses, researchers found 5,728 differentially expressed genes (DEGs) in response to salt stress, highlighting key genes and pathways that contribute to salt tolerance, such as antioxidant enzyme genes and metabolic pathways related to secondary metabolite biosynthesis.
- The study underscores the prominence of the phenylpropanoid biosynthesis pathway in the salt tolerance of perennial ryegrass, particularly in genotype P2, which showed higher levels of beneficial compounds like flavonoids and anthocyanins.
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