EXOGENOUSLY SALICYLIC ACID EFFECTS ON GROWTH AND SOME PHYSIOLOGICAL PARAMETERS OF in vitro CULTURED SALT STRESSED EMBRYOS OF EGGPLANT (Solanum melongena L.) CULTIVARS DIFFERING IN SALT TOLERANCE

摘要

Growth and some physiological traits of eggplant (cv. Kemer, salt sensitive and cv. Mardin Kiziltepe, salt tolerant) embryos cultured under different saline (NaCl), salicylic acid (SA) and salt with salicylic acid conditions were investigated.Germination percentage appeared to be the least effected parameter among all treatments for both cultivars except 100 mM NaCl + 150^M SA treatment in Mardin Kiziltepe. On the other hand, seedling stage was found to be more sensitive to salt and salt+SA treatments. While growth of salt treated plants showed a slight decrease in development compared to control plants, SA with or without salt treatment caused a significant decrease when compared to both control and just salt treated plants.A burst in proline content was found in both cultivars specifically at 150mM NaCl+150^M SA. In salt treated plantlets, while Na+ and Cl" contents of tissues were induced, Ca2+ and K+ levels were lowered. As a result, seedling stage was found to be more sensitive to salt and salt+SA treatments and the reduced growth rate during the developmental stage of eggplant embryos might be related to the osmotic stress induced by salicylic acid individually and SA accompanied with salt stress.