Determining the Relationship between Nitric Oxide (NO) and Drought Stress in Pepper Plant

Fikret Yasar, Ozlem Uzal, Ozlem Yasar


The aim of this study is to use the pointy pepper varieties of Demre as a test material and to determine whether NO (Nitric oxide), which is a messenger molecule, has a preventive effect on some metabolic changes that occur under the effect of drought stress in plants. In the experiment carried out in a controlled climate chamber, plants were cultured in containers containing Hoagland nutrient solution. For the application of drought stress, 10% Polyethylene Glycol (PEG 6000) was added to the nutrient solution, which is equivalent to -0.40 MPa osmotic potential. Before the application of drought stress, different doses of sodium nitroprusside (SNP) and potassium salt (carboxy-PTIO) are applied exogenously, SNP 0.01, SNP 1, SNP 100 and SNP 0.01 + cPTIO, SNP 1 + cPTIO, SNP Pre-treated with 100 + cPTIO. On the 10th day of drought, the chlorophyll content of plants, proline deposits and total plant weights were determined. Pre-treated plants with doses of 0.01 and 1 of SNP showed better performance in terms of the parameters determined.

Keywords: Pepper, Capsicum annum, carboxy-PTIO, Drought stress, Nitric oxide, SNP, Chlorophyll, Proline

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ISSN (online) 2422-8702