LUX ARRHYTHMO links CBF pathway and jasmonic acid metabolism to regulate cold tolerance of tea plants

• DOI: 10.1093/plphys/kiae337
• Publication Date: 2024-06-14T17:07:04Z
• Authors: Yanli Wang; Wei Tong; Fangdong Li; Lidiia Samarina; Penghui Li; Tianyuan Yang; Zhaoliang Zhang; Lianghui Yi; Fei Zhai; Xinchao Wang; Enhua Xia
• Keywords: Jasmonic acid; Cold sensitivity

Cold stress declines the quality and yield of tea, yet molecular basis underlying cold tolerance tea plants (Camellia sinensis) remains largely unknown. Here, we identified a circadian rhythm component LUX ARRHYTHMO (LUX) that potentially regulates through genome-wide association study transcriptomic analysis. The expression CsLUX phased with sunrise sunset was strongly induced by stress. Genetic assays indicated is positive regulator freezing in plants. directly activated CsCBF1 repressed level CsLOX2, which dynamically modulating jasmonic acid content. Furthermore, showed CsLUX-CsJAZ1 complex attenuated physical interaction CsJAZ1 CsICE1, liberating CsICE1 transcriptional activities to withstand Notably, single-nucleotide variation C-to-A coding region functionally validated as potential elite haplotype for response, provided valuable markers future resistance breeding