Jasmonate enhances cold acclimation in jojoba by promoting flavonol synthesis

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外文摘要：Jojoba is an industrial oil crop planted in tropical arid areas,and its low-temperature sensitivity prevents its introduction into temperate areas.Studying the molecular mechanisms associated with cold acclimation in jojoba is advantageous for developing breeds with enhanced cold tolerance.In this study,metabolomic analysis revealed that various flavonols accumulate in jojoba during cold acclimation.Time-course transcriptomic analysis and weighted correlation network analysis(WGCNA)demonstrated that flavonol biosynthesis and jasmonates(JAs)signaling pathways played crucial roles in cold acclimation.Combining the biochemical and genetic analyses showed that ScMYB12 directly activated flavonol synthase gene(ScFLS).The interaction between ScMYB12 and transparent testa 8(ScTT8)promoted the expression of ScFLS,but the negative regulator ScJAZ13 in the JA signaling pathway interacted with ScTT8 to attenuate the transcriptional activity of the ScTT8 and ScMYB12 complex,leading to the downregulation of ScFLS.Cold acclimation stimulated the production of JA in jojoba leaves,promoted the degradation of ScJAZ13,and activated the transcriptional activity of ScTT8 and ScMYB12 complexes,leading to the accumulation of flavonols.Our findings reveal the molecular mechanism of JA-mediated flavonol biosynthesis during cold acclimation in jojoba and highlight the JA pathway as a promising means for enhancing cold tolerance in breeding efforts.

作者：

Lamei Zheng、Bojing Li、Genfa Zhang、Yijun Zhou、Fei Gao

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作者单位：

Key Laboratory of Mass Spectrometry Imaging and Metabolomics(Minzu University of China),National Ethnic Affairs Commission,Beijing 100081,China

Key Laboratory of Ecology and Environment in Minority Areas(Minzu University of China),National Ethnic Affairs Commission,Beijing 100081,China

College of Life and Environmental Sciences,Minzu University of China,Beijing 100081,China

College of Life Sciences,Beijing Normal University,Beijing 100875,China

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出版年：

2024

DOI：

10.1093/hr/uhae125

园艺研究(英文)

CSTPCD

ISSN：

年,卷(期)：2024.11(7)