Studies regarding the effects of salicylic acid on maize (Zea mays L.) seedling under salt stress

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Article Title:	Studies regarding the effects of salicylic acid on maize (Zea mays L.) seedling under salt stress
Authors:	Cornelia PURCĂREA1*, Dorina CACHIŢĂ-COSMA2
Affiliation:	1 Faculty of Environmental Protection, University of Oradea, Romania 2 “Vasile Goldis” Western University of Arad, Romania
Abstract:	Abiotic stresses such as heavy metals, salinity, drought, temperature, UV-radiation, ozone, cause drastic yield reduction in most crops. Plants have complex and dynamic systems of response to stress. Salt stress affects around 20% of the world’s cultivated areas. Salicylic acid (SA) plays an important role in response to biotic and abiotic stress. Pre-treatment of maize seeds with SA may cause a low level of oxidative stress, improving the antioxidative capacity of the plants. Salicylic acid can increase the plant tolerance to salt stress induced in our experiment by 150 mM NaCl treatments. In our experiment we determined the effect of pretreatment of maize seeds with 0.5 mM concentration of salicylic acid (SA) solution on growth, peroxidase activity, assimilatory pigments and protein content of the 3thd leaves of maize seedlings under salt stress. The results obtained showed that exogenous application of SA induced an increase in growth parameters of maize seedlings and the peroxidase activity in the roots of maize seedlings was lower than in untreated plants. The treatment with SA ameliorates the total clorophyllian pigment content and the content of total soluble protein in maize seedling leaves under salt stress.
Keywords:	maize, salicylic acid, growth, peroxidase activity, protein content, assimilatory pigments
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*Correspondence:	Cornelia Purcărea, University of Oradea, Faculty of Environmental Protection, No. 26 Gen. Magheru St., 410048, Oradea, Romania, email cpurcarea@uoradea.ro