An overview and recent progress of plant growth regulators (PGRs) in the mitigation of abiotic stresses in fruits: A review

•Abscisic acid reduces the incidence of cracking in fruits.•Ethylene and salicylic acid are critical under abiotic stresses.•Auxins enhance root elongation and resist salinity stresses in fruits.•Polyamines, brassinosteroids and strigolactones regulate stress tolerance in fruits.•Nitric oxide reduces postharvest fruit yield losses.