Effect of pix on germination, growth, carbohydrates and antioxidant enzymes in cotton seed

Pix is a plant growth regulators that interferes with other hormones and affect the germination and growth of cotton. In this study the effect of different concentrations of pix, namely, 0 (control), 10, 20, 30 and 40 ppm on germination, radicle dry weight, radicle length, insoluble and soluble sugars and antioxidant enzymes activity (catalase, peroxidase and poly phenol oxidase) in cotton seedling (Gossypium hirsutum L. cv Ci-Ocra) in Petri dishes were examined. The results showed that germination percentage and radicle growth increased in concentration of 20 ppm of pix, also radicle dry weight reduced at concentrations 10 and 40 ppm. In addition, analysis of data revealed that different concentrations of pix did not affect catalase enzyme activity while it increased peroxidase and poly phenol oxidase activity as compared to the control.