DOI 10.36461/NP.2024.70.2.003
UDC 633.51: 575.826

INVESTIGATION OF THE SEED GERMINATION PARAMETERS AND MORPHOLOGY OF COTTON UNDER MODELED SALT STRESS CONDITIONS
V.S. Kamburova¹, Candidate of Biological Sciences, Head of Laboratory; I.B. Salakhutdinov¹, Candidate of Biological Sciences, Head of Laboratory; Bazarov D.K.^1,2, Junior Research Associate; Sh.Kh. Mamatkulova1, Junior Research Associate; O.L. Isomiddinova¹, Junior Research Associate;
E.A. Latypova³, Candidate of Biological Sciences, Associate Professor
¹Center of Genomics and Bioinformatics of the Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan, tel. +998 99 846-41-02, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
²Digital Technologies and Artificial Intelligence Research Institute, Uzbekistan, Tashkent, Uzbekistan
³Federal State Budgetary Educational Institution of Higher Education "Penza State Agrarian University", Penza, Russia, tel. 8 (9680) 32-19-80, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract. Soil salinization is a serious adverse environmental stress that severely limits the growth and development of plants and affects crop yields. The creation of salt-tolerant crop varieties using classical and molecular genetics methods, as well as the study, identification and understanding of the mechanisms of salt tolerance, open up wide-ranging opportunities in attempts to control this trait in plants. The article presents the results of the study of the germination parameters of cotton seeds and the morphology of the vegetative organs of the plants under modeled salt stress. The research subjects were varieties and lines of medium-fiber cotton of classical genetics and biotechnological gene knockout varieties of the Porlock series. The analysis of the results of the seed germination parameters: germination, mean germination time, germination index showed that the biotechnological gene knockout variety Porlock-4 was the most resistant to salinization (NaCl concentration 50, 100, 150 and 200 mM) and the line of classical selection Coker-312 was the least resistant. The investigations of the morphological parameters showed that an increase in the NaCl concentration up to 100 mM leads to a slowdown in root and shoot growth and an increase in biomass in both genotypes. However, the negative effect of NaCl was less pronounced in the biotechnological variety Porlock-4 than in the salt-sensitive line Coker-312.
Keywords: cotton, salt stress, tolerance, germination parameters, morphological parameters.

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