6. INTERNATIONAL CONGRESS ON CONTEMPORARY SCIENTIFIC RESEARCH
DETERMINATION OF THE TOLERANCE LEVEL OF CAULIFLOWER (Brassica oleracea var. botrytis L.) TO DIFFERENT DROUGHT LEVELS UNDER IN VITRO CONDITIONS
Plants are exposed to various environmental stresses during growth and development. Among these, drought is one of the most serious environmental stresses affecting plant productivity. In order to ensure the continuity of agriculture, it is necessary to determine the extent of the effects of drought on plants and their tolerance levels. In this context, this study aimed to determine the effects of different drought levels on the development of cauliflower seeds and plants. The study was conducted under in vitro conditions. MS was used as nutrient medium and PEG was added at 0%, 1%, 2%, 4% and 6% (KRA, KRB, KRC, KRD, KRE) to provide a drought environment. In order to determine the effects of increasing drought levels on cauliflower, germination percentage of seeds (%), stem wet weight (g), stem dry weight (g), root wet weight (g), root dry weight (g), stem length (cm) and root length (cm) were determined. As a result of the study, it was determined that the effect of increasing drought level on cauliflower seed germination, stem wet weight, root wet weight, stem length and root length was statistically significant. Although there were differences between the stem dry weights and root dry weights of the plants developed at different drought levels, these differences were not statistically significant. When the germination percentage of the seeds was analyzed, it was noted that the highest value was obtained from the seeds in KRA (52.00%) and the lowest value was obtained from the seeds in KRE (40.00%). The highest stem wet weight was obtained from KRA (0.1898 g) and the lowest from KRE (0.0484 g). The highest root wet weight was obtained from KRA medium (0.0108 g) and the lowest was obtained from KRE medium (0.0302 g). The highest stem and root lengths (4.15 cm and 6.91 cm) were obtained from KLA medium, respectively.