Published in Scientific Papers. Series B, Horticulture, Volume LXII
Written by Gabriela LUŢĂ, Daniela BĂLAN, Evelina GHERGHINA, Elena DOBRIN
Under the current climate changes, enhancing 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. The tolerance of stress is correlated with higher activities of antioxidant defense enzymes which are activated to prevent oxidative damage. On the other hand, the use of biofertilizers appears to be involved in increase 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 (Spraygard 1%, Razormin 0.1%, BAC Foliar spray 0.3% and BIO Roots 0.2%) on the chlorophylls and carotenoids content and on the activity of peroxidase and catalase have been investigated in leaves of tomato seedlings. Analysis of the obtained data emphasize the potential of growth regulators in enhancing the resistance to abiotic stresses by protecting the photosynthetic apparatus and improving the activity of antioxidant enzymes system.
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