Effects of various salt concentrations on germination of seeds and morphometric parameters of diploid wheat seedlings

Abstract

Aim. The aim of the research was the assessment of salt-tolerance of diploid wheat genotypes Triticum monococcum and Triticum dicoccum at the grain germination stage. Methods. To determine morphometric parameters of salt tolerance of wheat varieties, seeds were germinated in a NaCl solution and in distilled water using the roll method. Screening for salt tolerance of wheat genotypes was conducted at 100, 150 and 200 mM concentrations of NaCl. Seeds were kept on wet filter paper, at 20–22 ℃ temperature, in the dark for 3 days and then germinated under 12h/12h (light/dark) photoperiod for 7 days. Results. Germination energy for Tr. monococcum was 85–50 % and for Tr. dicoccum 85–70 % under salinity. Growth dynamics of the root system of diploid wheat genotypes during 10 days showed that the growth rate declined with increasing salt concentrations, and this decline was different in the genotypes. Conclusions. The results suggest that according to the characteristics of salt tolerance of diploid wheat varieties at the germination stage Tr. monococcum is a sensitive and Tr. dicoccum, which manifested relatively high parameters, is a tolerant variety.

Keywords: wheat genotypes, Triticum monococcum, Triticum dicoccum, salt stress, germination.