XVI International Botanical Congess

Our objective was: verify the influence of CaCl2 in maize cv. Saracura-BR154 tolerance to hypoxia and compare the effect of CaCl2 in plantlet survival with BR107 under hypoxia. CaCl2 concentrations were:0, 0.02, 0.26, 0.51,0.76,1,0%. The application was in a) germination paper b) flooding buffer c) germination paper+flooding buffer d) without Ca. The concentration 0,76% and mode c were more efficient. Plantlets without calcium or in sub-optimal doses showed a flacid aspect that in advanced stages caused death. Calcium extended maize survival during flooding. Considering the Saracura, after six days of flooding, the plant survival treated with calcium was 65%, and in its abscence this rate was 4%. The BR107 survival, with four days of flooding was 70%. Although in the same period without calcium survival was 0%. Sponsored by CNPq/FAPEMIG