The effect of lead stress on some of the biochemical properties in eggplant rootstocks and their varieties
The effects of heavy metal stress on plants may vary depending on the type and dosage of the heavy metals, and on the genetically based physiological properties of the plants. While some species can tolerate excessive concentrations of heavy metals, lead accumulation capacities in the same plant species and their conditions of lead tolerance can change. In addition to studies being carried out to investigate the usage of rootstock and grafted plants against heavy metal stress, which is abiotic stress, these studies have also reported that grafting and using rootstocks have significantly limited the uptake of heavy metals. In this study, the application of lead and the resulting changes in chlorophyll, MDA content and SOD, CAT, GR and APX enzyme activities have been investigated. For this study, which was carried out under controlled greenhouse conditions, 6 commercial eggplant rootstocks and 4 eggplant varieties were used as plant materials. The eggplant seedlings, once they were at a 4-5 real leaf stage, were subjected to 0, 150, and 300 ppm of Pb solution (Pb(NO3)2). Stress application on the plants lasted for a period of 20 days. At the end of this period, the plants were analyzed in terms of physiology and biochemistry. Different reactions in rootstocks were observed in relation to the properties analyzed. The application of lead, relative to the increase in dose applications, resulted in the decrease of chlorophyll content in the eggplant rootstocks. Rootstocks that were under stress conditions were found to have lower chlorophyll content, higher antioxidant enzyme activities (SOD, CAT, GR, and APX) and, especially those treated with 300 ppm lead, higher lipid peroxidation levels. Irrigation water that contained lead, had a negative effect on some of the biochemical properties in eggplants during their seedling stage.
Topal, M.N., Kıran, S., Ateş, Ç., Sönmez, K., Furtana, G.B., Tıpırdamaz, R., Ekici, M. and Ellialtıoğlu, Ş.Ş. (2019). The effect of lead stress on some of the biochemical properties in eggplant rootstocks and their varieties. Acta Hortic. 1257, 143-150
Pb, Solanum melongena, tolerance, enzymes, heavy metal stress