Coating shiitake mushrooms (Lentinus edodes) with a polysaccharide from Oudemansiella radicata improves product quality and flavor during postharvest storage

•Oudemansiella radicata polysaccharide (ORWP) maintained shiitake mushroom quality.•ORWP reduced mushroom weight loss, relative electrolyte leakage and MDA production.•ORWP treatment had higher biochemical quality and antioxidant enzymes activities.•ORWP-coated mushroom showed better physical microstructure during storage.