Abstract:
:Plants, being sessile organisms, have evolved several dynamic mechanisms of gene regulation. Epigenetic modification especially cytosine methylation and demethylation actively regulates the expression of genes. To understand the role of cytosine methylation during isoflavonoid biosynthesis and accumulation, we performed cytosine methylation analysis in the coding region of two isoforms IFS1 and IFS2 gene, in two contrasting soybean genotypes differing in total isoflavone content (NRC37: high isoflavone; and NRC7: low isoflavone). The results indicated increased 5-mC in both the isoforms in NRC37 (∼20.51% in IFS2 and ∼85% in IFS1) compared with NRC7 (∼7.8% in IFS2 and ∼2.5% in IFS1) genotype, which signifies the positive role of 5-mC in the coding region of the gene leading to enhanced expression. In addition, temporal expression profiling [35 days after flowering (DAF), 45, 55, and 65 DAF] of both the isoforms showed increasing trend of accumulation in both the genotypes with maximum in NRC37 at 65 DAF. To further establish a correlation between methylation and expression of transcripts, we quantified the different isoforms of isoflavone in both the genotypes across all the stages. Therefore, the finding of this study would certainly increase our understanding of epigenetic regulation of isoflavone biosynthetic pathway mediated by the cytosine methylation that would assist molecular breeders to get high-performing soybean genotypes with better isoflavone yield.
journal_name
DNA Cell Bioljournal_title
DNA and cell biologyauthors
Gupta OP,Dahuja A,Sachdev A,Jain PK,Kumari S,T V,Praveen Sdoi
10.1089/dna.2018.4584subject
Has Abstractpub_date
2019-06-01 00:00:00pages
510-520issue
6eissn
1044-5498issn
1557-7430journal_volume
38pub_type
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