老山芹层积前后种子差异代谢物分析OA北大核心CSTPCD

In order to deeply explore the seed dormancy mechanism of Heracleum moellendorffii Hance,the different metabolites of non-lamellarized seeds(NS)and germination seeds after lamellarization(GS)were analyzed by GC-TOF/MS(gas chromatography-time of flight mass spectrometry).The results showed that a total of 995 metabolites were detected,and there was a clear separation between NS and GS.There were 126 differential metabolites,among which 75 were extremely significant differential metabolites including 35 up-regulated and 40 down-regulated expressions.The metabolic pathways of the extremely significant differential metabolites were analysed and 10 key metabolic pathways were identified.The results of the chord diagram analysis showed that the lipids(including lipid-like molecules)was extremely significantly positive correlaed with benzenoids,while the benzenepropanoids(including polyketides)was extremely significantly negative correlation with organoxides.Above results provided theoretical basis of metabolomics for exploring the post-maturation germination of Heracleum moellendorffii Hance seeds,and researching the post-maturation and dormancy mechanisms of Heracleum moellendorffii Hance seeds.