The Evolution of Lipidomics during Oil Accumulation of <i>Plukenetia volubilis</i> Seeds
Yijun Fu,
Qiongjian Ou,
Lixuan Ye,
Huiyan You,
Zhaohui Wang,
Ao Yi,
Jia Wang,
Jun Niu
Affiliations
Yijun Fu
Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants-Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
Qiongjian Ou
Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants-Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
Lixuan Ye
Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants-Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
Huiyan You
Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants-Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
Zhaohui Wang
Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants-Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
Ao Yi
Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants-Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
Jia Wang
Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants-Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
Jun Niu
Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants-Ministry of Education, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
Sacha inchi (Plukenetia volubilis) is a valuable oilseed crop with a high content of polyunsaturated fatty acids (PUFAs). However, there is a lack of in-depth understanding of the lipidomics in Sacha inchi seeds (SIDs). Saturated fatty acids occupied more than half of the proportion (59.31%) in early development, while PUFAs accounted for 78.92% at maturation. The main triacylglycerols were TAG(18:3/18:3/18:3), TAG(18:2/18:2/18:3), and TAG(16:0/18:2/18:2). The corresponding species (18:3/18:3, 18:2/18:2, and 16:0/18:2) were also the main ingredients in diacylglycerol and phosphatidic acid, indicating high PUFA composition in the sn-1 and sn-2 positions of TAG. Only LPC(18:3), LPC(18:2), and LPC(16:0) were identified in SIDs, implying that those PUFAs on the sn-2 positions of the PC(18:3/-), PC(18:2/-), and PC(16:0/-) categories were released into the acyl-CoA pool for the Kennedy pathway. Conversely, the PC(18:1/-) and PC(18:0/-) categories might be responsible for the generation of PC-derived DAG and TAG. The lipidomics data will contribute to understanding the TAG assembly in developing SIDs, especially for PUFAs.
