草珊瑚中类胡萝卜素合成的内源激素调控机制分析.

[Objective]This work aims to explore the possible regulatory mechanism of endogenous hormones on the differential accumulation of carotenoids in different organs of Sarcandra glabra.[Method]In this study, metabolomics was used to analyze the differential distribution of endogenous hormones and carotenoid metabolites in different organs of S. glabra. Combined with transcriptomics technology, the differential enzyme genes related to carotenoids in S. glabra were excavated, and the transcription factors involved in the regulation of differential enzyme genes and their hormone-related cis-response elements were further predicted, so as to analyze the possible regulation of endogenous hormones on the differential accumulation of carotenoids.[Result]The contents of seven endogenous hormones such as indole3-carboxylic acid,[(-)-jasmonic acid], ethyl dihydrojasmonate, castasterone and brassinolide were high in the leaves. Consistent with the enrichment sites of 8 differential metabolites, such as canthaxanthin, echinenone, neoxanthin and nostoxanthin; and abscisic acid, gibberellin 4,5-methoxysalicylic acid, dihydrojasmonic acid and 5,6-dihydroxyindole was high in the roots, it was consistent with the accumulation site of 3 differential metabolites, abscisic aldehyde, 4,4'-aiapolycopenedial and antheraxanthin. The key transcription factor MYB106, SPL1, NAC015, ERF064, WRKY44 and BHLH116 responded to the stimulation of plant hormones such as AUX, SA, GA, ABA, and Me_ JA, and participate in the regulation of carotenoid synthesis pathway DXS, VDE, ABA2, AOG, ZEP, CYP97C1, DWARF27, CRTISO, LCYB expression of these 9 metabolic enzymes. Quantitative real-time polymerase chain reaction(RT-qPCR)results showed that the expression trends of 8 randomly selected differentially expressed genes were consistent with the transcriptome sequencing results.[Conclusion]The 15 differential endogenous hormones and 11 differential metabolites related to carotenoids in the leaves and roots of Sarcandra glabra were screened, and 6 transcription factors were predicted to be involved in the regulation of 16 metabolic enzymes. [ABSTRACT FROM AUTHOR]