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

Authors : Nimet KILINÇOĞLU, Cevher İlhan CEVHERİ, Cenap CEVHERİ, Hatice Yüsra NAHYA

Pages : 689-700

Doi:10.31015/jaefs.2021.4.30

View : 40 | Download : 8

Publication Date : 2021-12-15

Article Type : Research Paper

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