Effects of exogenous glycine betaine application on some physiological and biochemical properties of cotton (G. hirsutum L.) plants grown in different drought levels

Drought stress significantly reduces the growth and yield of cotton plants; therefore, reducing damage caused by drought improving plant are highly important. The aims this study were to investigate some physiological biochemical properties plants exposed different levels determine extent improvement obtained exogenous glycine betaine treatment for damages adverse effects drought. Three created using PEG (Polyethylene glycol 6000) solution (0%, 10% 20%). groups also divided into 2 subgroups 0 (control: was not applied) mM solution. pot experiment established in a chamber with 3 replications repeated twice. changes contents chlorophyll b, carotenoid, total dissolved protein, carbohydrate nutrients investigated. Chlorophyll calcium, magnesium, sodium phosphorus concentrations decreased, while protein carbohydrate, potassium increased increasing level. results revealed that on alleviated application betaine.