An integrated analysis of the rice transcriptome and lipidome reveals lipid metabolism plays a central role in rice cold tolerance

• DOI: 10.1186/s12870-022-03468-1
• Publication Date: 2022-03-02T02:02:39Z
• Authors: Hualong Liu; Wei Xin; Yinglin Wang; Dezhuang Zhang; Jingguo Wang; Hongliang Zheng; Luomiao Yang; Shoujun Nie; Detang Zou
• Keywords: Lipidome; Phosphatidate; Membrane Lipids; Phosphatidylethanolamine

Rice (Oryza sativa L.) is one of the most widely grown food crops, and its yield quality are particularly important for a warm-saturated diet. Cold stress restricts rice growth, development, yield; however, specific mechanism cold tolerance in remains unknown.The analysis leaf physiological photosynthetic characteristics showed that two varieties were significantly affected by stress, but cold-tolerant variety KY131 had more stable characteristics, maintaining relatively good capacity. To better explore transcriptional regulation biological basis response to comprehensive transcriptome lipidome under low temperature control conditions was carried out. The transcriptomic revealed lipid metabolism, including membrane fatty acid may be an factor tolerance, 397 metabolism related genes have been identified. Lipidomics data confirmed importance remodeling unsaturation adaptation stress. This indicates changes fluidity integrity lead reduction capacity, which could relieved increased levels monogalactosyldiacylglycerol mainly caused markedly expression 1,2-diacylglycerol 3-beta-galactosyltransferase (MGD). upregulation phosphatidate phosphatase (PAP2) inhibited excessive accumulation (PA) produce phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylglycerol (PG), thereby preventing phase transition In addition, β-oxidation worth further study tolerance. Finally, we constructed metabolic model regulatory rice, advanced system plays central role.Lipidome composition affected, especially phospholipids galactolipids. Our provides new information understand