Journal
ANTIOXIDANTS
Volume 11, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/antiox11050968
Keywords
heat stress; salicylic acid; Pleurotus ostreatus
Funding
- China Agriculture Research System [CARS20]
- Major Public Welfare Special Projects in Henan Province [201300110700]
- Key Program for Science and Technology Development of Henan Province [212102110395]
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The phytohormone salicylic acid (SA) can enhance the antioxidant capacity and hyphal growth recovery rate of Pleurotus ostreatus under heat stress. SA application weakens central carbon metabolism and promotes cell survival under heat stress by reducing ROS production through altering mitochondrial metabolism.
Pleurotus ostreatus (Jacq.) P. Kumm is cultivated worldwide, and its growth is seriously threatened by heat stress. Here, we performed a comprehensive analysis to investigate the influence of the phytohormone salicylic acid (SA) in P. ostreatus under HS. The results showed that the hyphal growth recovery rate and the antioxidant capacity of P. ostreatus increased with exogenous SA application (0.01 mmol/L and 0.05 mmol/L) after HS treatment. Metabolomic and transcriptomic analyses showed that SA application (0.05 mmol/L) weakened central carbon metabolism to allow cells to survive HS efficiently. In addition, SA shifted glycolysis to one-carbon metabolism to produce ROS scavengers (GSH and NADPH) and reduced ROS production by altering mitochondrial metabolism. SA also maintained nucleotide homeostasis, led to membrane lipid remodeling, activated the MAPK pathway, and promoted the synthesis of cell-wall components. This study provides a reference for further study of SA in microorganisms.
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