SlFHY3 and SlHY5 act compliantly to enhance cold tolerance through the integration of myo-inositol and light signaling in tomato
SlFHY3 and SlHY5 act compliantly to enhance cold tolerance through the integration of myo-inositol and light signaling in tomato
复制标题
SlFHY3和SlHY5通过整合番茄中的肌醇和光信号传导来增强耐寒性
DOI：
10.1111/nph.17934
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发表时间：
--
期刊：
影响因子：
9.4
通讯作者：
Tianlai Li
中科院分区：
文献类型：
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作者：
Feng Wang;Xiujie Wang;Ying Zhang;Jiarong Yan;Golam Jalal Ahammed;Xin Bu;Xin Sun;Yufeng Liu;Tao Xu;Hongyan Qi;Mingfang Qi;Tianlai Li
Plants have evolved sophisticated regulatory networks to cope with dynamically changing light and temperature environments during day–night and seasonal cycles. However, the integration mechanisms of light and low temperature remain largely unclear.Here, we show that low red : far‐red ratio (LR : FR) inducesFAR‐RED ELONGATED HYPOCOTYL3(SlFHY3) transcription under cold stress in tomato (Solanum lycopersicum). Reverse genetic approaches revealed that knocking outSlFHY3decreasesmyo‐inositol accumulation and increases cold susceptibility, whereas overexpressingSlFHY3inducesmyo‐inositol accumulation and enhances cold tolerance in tomato plants.SlFHY3 physically interacts with ELONGATED HYPOCOTYL5 (SlHY5) to promote the transcriptional activity of SlHY5 onMYO‐INOSITOL‐1‐PHOSPHATE SYNTHASE 3(SlMIPS3) and inducemyo‐inositol accumulation in tomato plants under cold stress. Disruption ofSlHY5andSlMIPS3largely suppresses the cold tolerance ofSlFHY3‐overexpressing plants andmyo‐inositol accumulation in tomato. Furthermore, silencing ofSlMIPS3drastically reducesmyo‐inositol accumulation and compromises LR : FR‐induced cold tolerance in tomato.Together, our results reveal a crucial role of SlFHY3 in LR : FR‐induced cold tolerance in tomato and unravel a novel regulatory mechanism whereby plants integrate dynamic environmental light signals and internal cues (inositol biosynthesis) to induce and control cold tolerance in tomato plants.
