Análisis de la toxicidad por aluminio en el crecimiento de dos variedades de “frijol”, Phaseolus vulgaris L.

Abstract

Acidic soils are approximately 35% of arable soils and one of the most important limitations in agriculture. The restriction in the growth and production of the culture with a pH lower than 5.0 is mainly due to the formation and migration of aluminum ions (Al3 +). With this background, the growth toxicity of two varieties of Phaseolus vulgaris L. var. “canario” and var. “panamito” was analyzed. The completely randomized experimental block design had the treatments of 50 µM, 25 µM and 0 µM, with three repetitions each. The seedlings were adapted in a hydroponic system, which contained the modified Hoagland nutrient medium and the different concentrations of aluminum. After three days root length, fresh and dry weight, accumulation of the metal in leaves and roots, peroxidase activity, protein percentage were evaluated. The panamito was more sensitive in relation to the canario according to the evaluated variables. Aluminum accumulation was greater in the leaves for the panamito and in the roots for the other variety. It is concluded that the canario is more tolerant than the panamito variety

Keywords

• toxicity
• phaseolus vulgaris l.
• aluminum