THE EFFECT OF SALICYLIC ACID ON THE CONTENT OF PHOTOSYNTHETIC PIGMENTS AND THE ACTIVITY OF ANTIOXIDANT ENZYMES IN COTTON SEEDLINGS
2022
Amrahov, Nurlan | Bayramova, Saadat | Mammadova, Ruhangiz | Ojagverdiyeva, Sabina | Aghazada, Goncha | Alizada, Shabnam | Mammadov, Ziaddin
The effects of salicylic acid on the content of photosynthetic pigments and activity of antioxidant enzymes in Gossypium barbadense Pima 3-79 and Gossypium hirsutum TM1 cotton genotypes seedlings was studied. It was established that salicylic acid (SA) was involved in the regulation of the content of photosynthetic pigments in cotton seedlings, but genotypes of cotton differed significantly in sensitivity to this phytohormone. Maximum stimulation effect of SA in G. barbadense Pima 3-79 was observed at1mM and in G. hirsutum TM1 at 0.1 mM. At low concentration of SA (0.1 mM) catalase activity in both cotyledons was positively stimulated, but high of SA (1 mM) caused the activity inhibition. Peroxidase activity linearly increased depending on SA concentration in G. barbadense Pima 3-79, but the same effect was observed only at relatively high concentrations of SA (10 mM). SA did not induce SOD activity. At low concentrations of SA - 0.1 and 1 mM, SOD activity decreased in both genotypes, but at high concentration - 10 mM, it was practically at the same level as control. Impact of SA on polyphenol oxidase activity had a zigzag pattern depending on concentration. 0.1 and 10 mM of SA caused stimulation, but 1 mM caused stimulation of enzyme activity in both genotypes. So, SA participated in regulation of photosynthetic pigment and antioxidant enzyme activity, but showed both cotton genotype and antioxidant enzyme specify.
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