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Direct links between the vernalization response and other key traits of cereal crops

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https://ir.library.oregonstate.edu/concern/articles/sj1393708

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Abstract
  • Transcription of the VERNALIZATION1 gene (VRN1) is induced by prolonged cold (vernalization) to trigger flowering of cereal crops, such as wheat and barley. VRN1 encodes a MADS box transcription factor that promotes flowering by regulating the expression of other genes. Here we use transcriptome sequencing (RNA-seq) and chromatin immunoprecipitation sequencing (ChIP-seq) to identify direct targets of VRN1. Over 500 genomic regions were identified as potential VRN1-binding targets by ChIP-seq. VRN1 binds the promoter of FLOWERING LOCUS T-like 1, a promoter of flowering in vernalized plants. VRN1 also targets VERNALIZATION2 and ODDSOC2, repressors of flowering that are downregulated in vernalized plants. RNA-seq identified additional VRN1 targets that might play roles in triggering flowering. Other targets of VRN1 include genes that play central roles in low-temperature-induced freezing tolerance, spike architecture and hormone metabolism. This provides evidence for direct regulatory links between the vernalization response pathway and other important traits in cereal crops.
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  • Deng, W., Casao, M. C., Wang, P., Sato, K., Hayes, P. M., Finnegan, E. J., & Trevaskis, B. (2015). Direct links between the vernalization response and other key traits of cereal crops. Nature Communications, 6, 5882. doi:10.1038/ncomms6882
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  • 6
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  • We gratefully acknowledge support of Philippe Moncuquet and the CSIRO Bioinformatics Core in assisting with analysis of ChIP-Seq datasets.
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