Molecular Mechanism of a New Transcription Factor RcbHLH59 Improving Salt Stress Adaptation in Rosa chinensis
Published:16 Feb.2023 Source:Hortic Res
Salt stress is the main abiotic stress that affects the application of rose (Rosa chinensis) in outdoor greening in high-salt or coastal areas, which can easily lead to its poor growth and development, decline in ornamental quality, and limit its growth and application scope. Therefore, it is of great significance to explore effective salt-tolerant genes and analyze the molecular mechanism of their adaptation to salt stress for cultivating rose varieties with high resistance and improving their application range.
Recently, Horticulture Research published a research paper online entitled “RebHLH59-RcPRs module enhances salinity stress tolerance by balancing Na+/K+through callose deposition in rose (Rosa chinensis)”. This study identified a new salt stress-induced basic helix-loop-helix family transcription factor XI subfamily member RcbHLH59 in rose.
Basic helix-loop-helix (bHLH) proteins play pivotal roles in plant growth, development, and stress responses. However, the molecular and functional properties of bHLHs have not been fully characterized. In this study, a novel XI subgroup of the bHLH protein gene, RcbHLH59, was isolated and identified in rose (Rosaspp.). This gene was induced by salinity stress in both rose leaves and roots, and functioned as a transactivator. This study provides excellent gene resources for salt tolerance molecular breeding of roses, and provides new ideas for salt tolerance research of other species.