Ciencias Agropecuarias
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Item Evaluación de cepas bacterianas resistentes a metales pesados en la zona del canal de riego Latacunga-Salcedo-Ambato con potencial biorremediador(2016) Reinoso Torres, Daniel Patricio; Ibarra López, ElizabethThe Latacunga-Salcedo-Ambato irrigation canal is supplied with water from the Cutuchi river, which irrigates important crop areas of the provinces of Cotopaxi and Tungurahua. The direct dumping of contaminated water to the river by tanneries, textile industries, sewage, slaughterhouses, factories, hospitals and agricultural activities, make this ecosystem a space susceptible to contamination by heavy metals. This study determined the resistance capacity of bacterial strains to heavy metals copper and cadmium using biomass of bacteria previously isolated from the Latacunga-Salcedo-Ambato irrigation canal. Ten bacteria from the microorganism bank of the Faculty of Agricultural Sciences were chosen at random, which are coded as BUTA1 to BUTA40 and the macroscopic and microscopic characterization was performed. The determination of bacterial resistance was analyzed by the method of bacterial growth in solid medium and liquid medium according to Serrano, 2015. The bacteria BUTA13, BUTA15, BUTA16 and BUTA19 presented a wide range of resistance to the presence of 2mM of Cu. As for the bacteria BUTA13, BUTA16 and BUTA19 presented a wide range of resistance to the presence of 2mM of Cd. The results obtained show bacterial strains isolated from a source of natural environmental contamination with potential for resistance to heavy metals constituting bacteria suitable for application in bioremediation processes of ecosystems contaminated with heavy metals such as Cu and Cd. Key words: Resistance, heavy metals, bacterial strains, bioremediation.