Effect of biosorption of Fe 2+ by Rhodotorula mucilaginosa YMM19 on the physiology of Lupinus albus , Triticum aestivum , Vicia faba , and Zea mays seedlings

The goal of this study was to look into growth changes and a number of metabolic events in Fe 2+ treated Lupinus albus, Triticum aestivum , Vicia faba, and Zea mays plants and assess the role of biosorption of Fe 2+ by Rhodotorula mucilaginosa YMM19 to alleviate these changes. The effect of Fe 2+ concentrations (untreated and treated with biosorbent) on seed germination was studied. T. aestivum plumule was stimulated with a low dose of Fe 2+ . However, the application of Fe 2+ reduced the elongation of plumule, and radicle of all seeds during germination. High doses of Fe 2+ treated with biosorbent significantly increased seedling weights (fresh and dry) of all plants. Also, after 20 days, the height, and weight of seedlings of L. albus , T. aestivum , and Z. mays were increased with biosorbed Fe 2+ solution. In addition, biosorption of Fe 2+ enhanced total carbohydrate and protein accumulation in both T. aestivum and Z. mays radicles. Moreover, Fe 2+ caused slight suppression of α- and β-amylase in L. albus and Z. mays seeds after 2 days, but the opposite effect was observed in T. aestivum . Thus, the biosorption by R. mucilaginosa YMM19 is an efficient system for removing the negative effect of excess Fe 2+ from water.