Response of local tomato genotypes to drought stress

This study aims to identify the response of local tomato genotypes to drought under high temperature conditions.
The research was conducted on a floating system during May and July of 2019. Eighty-four local genotypes in total were used in the study with a hybrid cultivar.
After seedlings were grown in peat under controlled conditions, they were transferred to a ventilated floating water culture (3 pots for each genotype). Diluted Hoagland nutrient solution (EC: 1.92-2.08 dS m^‑1, pH: 6.16-6.38) was added to pots (1 L plant^-1). In order to induce drought stress, PEG 6000 was applied to seedlings.
For a period of 18 days PEG 6000 was gradually applied to seedlings at the osmotic pressure level of -0.25, -0.50, -0.75 and -1.00 bar.
The plants were kept at each pressure level for 48 h.
The morphological measurement of plant height, stem diameter, leaf number and leaf thickness were noted.
PEG treatment caused a decrease in these parameters, however tomato genotypes displayed different responses against drought.

IV International Symposium on Horticulture in Europe – SHE2021

M. Sirkeci, Y. Tüzel, G.B. Öztekin, T. Aşçıoğul, T. Durdu

PEG, floating system, climate change, seedling

https://doi.org/10.17660/ActaHortic.2021.1327.80