Abstract
The potential signaling mechanism of Dictyophora indusiata during postharvest morphological development was investigated through quantitative phosphoproteomic analyses. A total of 1566 phosphorylation sites changed significantly (872 upregulated and 694 downregulated) in the mature stage compared with those in the peach-shaped stage of D. indusiata. Bioinformatics analysis showed that the upregulated differentially phosphorylated proteins were mainly involved in the “phosphatidylinositol signaling system” and “mitogen-activated protein kinase signaling pathway-yeast”, while the downregulated differentially phosphorylated proteins were related mainly to “starch and sucrose metabolism”. Further mining of the phosphoproteome data revealed that upregulated phosphoinositide signaling activated the cell wall integrity pathway and then regulated the synthesis of the main components of the cell wall. The results suggested that phosphoinositide signaling could be a potential target pathway for the regulation of the postharvest morphological development of D. indusiata.
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