Protective effects induced by growth regulators treatment on eggplant (Solanum melongena L.) seedlings

High temperature is now considered to be one of the major abiotic stresses inducing negative effects on plant growth as results of increased production of toxic reactive oxygen species. Higher stress tolerance is correlated with higher activities of antioxidant defense enzymes which are activated to prevent oxidative damage. In the meantime, treatment with growth regulators appears to be involved in induction of tolerance to various abiotic stresses, besides their important role in regulating plant growth, development and fruiting. Influence of environmental conditions and of some growth regulators treatments (Razormin 0.1%, Spraygard 1%, BAC Foliar spray 0.3% and BIO Roots 0.2%) on the some biometric and biochemical parameters has been investigated in leaves of eggplant (Solanum melongena L.) seedlings. The researches performed led to conclusion that growth regulators treatment could attenuate the negative impact of heat stress on plant growth by protecting the photosynthetic apparatus and enhancing antioxidant enzyme systems.