Comparative studies about the influence of salicylic and acetylsalicilic acid on content of assimilatory pigments in the primary leaves of sunflower (Helianthus sp.) plantlets

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Article Title:	Comparative studies about the influence of salicylic and acetylsalicilic acid on content of assimilatory pigments in the primary leaves of sunflower (Helianthus sp.) plantlets
Authors:	Cornelia Purcarea, Dorina Cachita-Cosma
Affiliation:	1 University of Oradea, Faculty of Environmental Protection 2 “Vasile Goldis” Western University of Arad, Faculty of Life Sciences
Abstract:	Salicylic acid (SA) and acetylsalicylic acid (ASA) are phenolic compounds recently recognized as plant growth regulators involved in many physiological processes including photosynthesis. The aim of this paper is to study the influence of exogenous salicylic and acetylsalicylic acid in different concentrations on the assimilatory pigments contents of the leaves of sunflower seedlings in comparison with the same parameters of the control lots which were treated with water. The sunflower seedlings primary leaves were sprayed for an additional 7 days with 1 ml salicylic acid (SA) or acetylsalicylic acid (ASA) 0.01mM; 0.1mM; 0.5 mM, 1.0mM, 5.0 mM and with water for the control lots. In the 14th day of germination we determined the content of assimilatory pigments extracted with N,N-dimethylformamide (DMF). The results showed that exogenous 0.01mM; 0.1mM SA and ASA solutions, increased the total chlorophyllian and carptenoid pigments content, and more concentrated solutions decreased this parameter.
Keywords:	sunflower, salicylic acid, acetylsalicylic acid, primary leaves, total clorohyllian pigments carotenoid pigments
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*Correspondence:	Cornelia PURCĂREA, University of Oradea, Faculty of Environmental Protection, No. 26 Gen. Magheru St., 410048, Oradea, Romania, tel +40-(259)-212204, email cpurcarea@uoradea.ro