Affiliation:
1. College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China
2. Shanxi Key Laboratory of Edible Fungi for Loess Plateau, Taigu 030801, China
3. Shanxi Research Center for Engineering Technology of Edible Fungi, Taigu 030801, China
Abstract
Pleurotus ostreatus is widely cultivated in China. H2O2, as a signaling molecule, can regulate the formation of cap color, but its regulatory pathway is still unclear, severely inhibiting the breeding of dark-colored strains. In this study, 614 DEGs specifically regulated by H2O2 were identified by RNA-seq analysis. GO-enrichment analysis shows that DEGs can be significantly enriched in multiple pathways related to ATP synthesis, mainly including proton-transporting ATP synthesis complex, coupling factor F(o), ATP biosynthetic process, nucleoside triphosphate metabolic processes, ATP metabolic process, purine nucleoside triphosphate biosynthetic and metabolic processes, and purine ribonuclease triphosphate biosynthetic metabolic processes. Further KEGG analysis revealed that 23 DEGs were involved in cap color formation through the oxidative phosphorylation pathway. They were enriched in Complexes I, III, IV, and V in the respiratory chain. Further addition of exogenous uncoupling agents and ATP synthase inhibitors clarifies the important role of ATP synthesis in color formation. In summary, H2O2 may upregulate the expression of complex-encoding genes in the respiratory chain and promote ATP synthesis, thereby affecting the formation of cap color. The results of this study lay the foundation for the breeding of dark-colored strains of P. ostreatus and provide a basis for the color-formation mechanism of edible fungi.
Funder
Shanxi Provincial basic Research and Development Project
Shanxi Province Work Award Fund Research Project
Doctoral Science Foundation of Shanxi Agricultural University
Subject
Plant Science,Ecology, Evolution, Behavior and Systematics,Microbiology (medical)