Effect on Some Plant Growth Parameters of Magnesium Applications in Pepper Plants under Salt Stress

Abstract

In the study of using Demre pepper seeds, morphological and biochemical effects of magnesium (Mg) applied at different doses of pepper plant under salt stress were investigated. The study was carried out in 16/8 hour light / dark photoperiod, 25 0C and 70% humid climate room in controlled conditions. In the study, root weight, stem weight, leaf weight, number of leaves, plant height and plant node spacing were measured. In addition, the salt tolerance scales of the plants were determined. Seedlings of Demre pepper cultivar were grown in Hoagland nutrient solution and 100 mM NaCl was applied to the plants to apply salt stress. In addition to salt application to the plants, Mg doses Mg 1=49,28 ppm, Mg 2 =24,64 ppm, Mg3 = 73,92 ppm, Mg4 = 98,56 ppm, Mg5 = 123,20 ppm)were applied in different doses and the growth of the plants were compared. On the 20th day of the salt application, some growth parameters of the plants were examined and the salt resistance scales of these applications were formed according to the scale 1-5. Increasing doses of Mg together with salt application resulted in small increases in root, stem and leaf weight of pepper plants. Among the salt applications, the highest root, stem and leaf weight were taken from the fourth dose of Mg. The same conditions were observed in terms of the number of leaves, plant height and internodes. When the scale values are examined, it is seen that the least affected plants are in Mg 4 + Salt application. It is followed by Mg 3 + Salt, Mg 5+ Salt and Mg 2 + Salt applications respectively. The most morphologically damaged application is Mg 1 + Salt. It can be said that increasing doses of Mg had a positive effect on the development of plants under salt stress in this study which was conducted with the assumption that salt stress could reduce the negative effect on plant growth.

Keywords: Salt stress, Magnesium, NaCl, Pepper (Capsicum annum L.)

DOI: 10.7176/JSTR/5-10-05