This article investigates the effect of exogenous phytohormones ABA and IAA on the content of reducing sugars and endogenous phytohormones in cotton seedlings of varieties Porlok-4, obtained on the basis of gene knockout technology and a marker of associated breeding - Ravnak-1. Exogenous phytohormones (ABA and IAA) can significantly change the level of cotton resistance to unfavorable environmental factors. Under the action of exogenous ABA causes an increase of cotton resistance to salinity. Biotechnological cotton variety Ravnak-1 showed sensitivity to prolonged exposure to salinity in combination with phytohormones, increasing the content of reducing sugars and endogenous phytohormones, depending on the duration of salt stress. In the Porlok-4 variety, under the influence of salinity, the content of reducing sugars and endogenous phytohormones had an insignificant increase, due to the inherent adaptive capacity of the variety. The conducted studies allow us to conclude that phytohormones are actively involved in the formation of cotton resistance to the action of unfavorable environmental factors of an abiotic nature.
Application of gene knockout technology in research of intestinal epithelial barrier mechanism in inflammatory bowel disease
