A comparative study on salt stress response of Camelina sativa and Carthamus tinctorius during germination

Abstract

Soil salinization is one of the most significant global problems, leading to reduced agricultural productivity potential and biodiversity. The main salt commonly found on the surface of soils and in water is NaCl, which directly impacts plant growth and land degradation. Therefore, this study was conducted to examine the morpho-physiological characteristics of two genotypes of Camelina sativa (‘NS Slatka’; ‘NS Zlatka’) and two genotypes of Carthamus tinctorius (‘NS Lana’; ‘NS Una’), which potentially characterize them as salt-tolerant crops. The levels of salinity tolerance were compared under five NaCl treatments, ranging from 0 mM to 200 mM. Based on the obtained results, seeds of all four genotypes germinated at the highest salt concentration (200mM NaCl), but the germination percentage declined at all salt oncentrations. Moreover, lower salt concentrations induced root elongation and reduced shoot length of seedlings of all four genotypes. Salt stress tolerance indexes showed the importance of converting the plant parameters into mathematical indexes, and the significance of comparing all the tolerance indexes according to salt stress.

Zaslanjenost zemljišta kao jedan od najznačajnijih problema u svetu dovodi do smanjene poljoprivredne proizvodnje i smanjenja biodiverziteta. Najčešće zastupljena so u zemljištu i vodi je NaCl koja direktno utiče na rast biljaka i degradaciju zemljišta. Zbog navedenog problema, tokom ovog rada, ispitane su agronomske karakteristike dva genotipa Camelina sativa („NS Slatka”; „NS Zlatka”) i dva genotipa Carthamus tinctorius („NS Lana”; „NS Una”), koje ih potencijalno izdvajaju kao tolerantne useve na soni stres. Ispitano je pet tretmana NaCl od 0 mM do 200 mM. Na osnovu dobijenih rezultata seme svih ispitivanih genotipova je klijalo pri najvećem tretmanu (200 mM NaCl), međutim pri svim tretmanima zaslanjenosti procenat klijanja se smanjio. Takođe, došlo je do produžavanja korena i smanjenja dužine izdanka klijanaca kod svih ispitivanih genotipova. Korišćeni indeksi tolerancije na soni stres su pokazali značajnost preračunavanja dobijenih biljnih parametara preko matematičkih indeksa, kao i značajnost uporednog pregleda svih indeksa tolerancije na soni stres.