species are economically important tropical and subtropical forage legumes which are generally vulnerable to chilling and frost. Fine-stem stylo ( var. ) has the most superior cold tolerance among all stylo species. A () gene, , was cloned from fine-stem stylo. Bioinformatic analysis suggests that encodes a transcription factor of 292 amino acid residues, which belongs to the LATE ELONGATED HYPOCOTYL/CIRCADIAN CLOCK ASSOCIATED 1-LIKE (LCL) subgroup of RVE family and contains a SHAQKYF-class MYB domain and a LCL domain. is universally expressed in root, stem and leaf tissues of fine-stem stylo and is rapidly up-regulated in all tested tissues under cold stress. Over-expressing affects expression of 21 circadian clock genes, up-regulates expression of 6 nucleotide binding domain leucine-rich repeats (NB-LRR) encoding genes associated with tobacco cold tolerance, improves physiological responses to low temperature, and endows the transgenic tobaccos with higher tolerance to cold stress. This is the first time a study investigates the biological function of RVE6 in cold responses of plant species.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7466579PMC
http://dx.doi.org/10.3389/fpls.2020.01276DOI Listing

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