Nitric oxide alleviates heat stress-induced oxidative damage in Pleurotus eryngii var. tuoliensis

► Exogenous NO (SNP) protected against oxidative damage under heat stress in P. eryngii var. tuoliensis. ► Endogenous NO level responded to heat stress. ► NOS-dependent NO production was associated with increase of NO under heat stress. ► NOS and/or NR was involved in SNP-regulated NR activities and lipid peroxidation.