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espanolLa estructura celular y las alteraciones en la organizacion del tejido de raiz se analizaron en Zea mays L. amylacea como consecuencia de altos niveles de boro (B) y de salinidad. Concentraciones de los tratamientos de salinidad fueron 100 mM NaCl (baja salinidad, L) y 430 mM NaCl (alta salinidad, H). El exceso de B se suministro como acido borico para obtener 20 (334 µM) y 40 (668 µM) B mg kg-1 en la solucion de nutrientes durante 20 dias. Nuestros resultados complementan otros estudios sobre el ecotipo amylacea y confirman el alto grado de tolerancia a la salinidad y el exceso de B mostrada por esta variedad. La aplicacion de B bajo condiciones sin sal y baja salinidad no dio lugar a cambios en la estructura de las celulas de la corteza de la raiz ni el cilindro vascular. Bajo condiciones de alta salinidad celulas de la raiz amylacea mostraron alteraciones leves, como un aumento en el numero de filas de celulas. Estas condiciones de alta salinidad no resultaron en el espesor de la estela. EnglishCell structure and alterations in tissue organization were analyzed for roots of Zea mays L. amylacea as a consequence of high salinity and boron (B) levels. Saline treatment concentrations were 100 mM NaCl (Low salinity, L) and 430 mM NaCl (High salinity, H). An excess of B was supplied as boric acid to obtain 20 (334 µM) and 40 (668 µM) mg B kg-1 in the nutrient solution for 20 days. Our results complement other studies on the amylacea ecotype and confirm the high degree of tolerance to salinity and excess B shown by this variety. The application of B under no salt and low salinity conditions did not result in structure changes in root cortex cells nor the vascular cylinder. Under high salinity conditions amylacea root cells showed slight alterations, such as an increase in the number of rows of cells. These high salinity conditions did not result in thickness of the stele.

Combined effects of excess boron and salinity on root histology of Zea mays L. amylacea from the Lluta Valley (Arica, Chile)