36. Effect of Iodine on the Growth and Quality of Nostoc flagelliforme

This study was carried out to evaluate the effect of diverse iodine form-iodide and iodate on the biomass as well as the content of soluble protein, pigment, and iodine in Nostoc flagelliforme cells. In our study, tested factors (iodine form-iodide and iodate) significantly influenced the growth and content of soluble protein, pigment, and iodine in N. flagelliforme cells. Moreover, results obtained have shown that N. flagelliforme cultured with I⁻ take up greater amounts of iodine than those treated with IO₃ ⁻. Besides, at the initial iodine concentration of 600 mg/L in the form of KI and KIO₃, the biomass of N. flagelliforme significantly increased by 2.6 % and decreased by 3.2 %, respectively. In addition, the highest content of soluble protein was, respectively, 2.56 and 2.46 mg/g when the concentration of iodine in the form of iodide and iodate was at a dose of 600 mg/L. With respect to chlorophyll a content, the results of our work have shown that N. flagelliforme cells cultured with KI contained higher amounts of chlorophyll a than those treated with KIO₃. All these studies suggest that the introduction of iodine in the form of KI proved to be much more effective in respect to iodine accumulation of N. flagelliforme than that of KIO₃.