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

  1. Elizabeth Bastías
  2. María B González-Moro
  3. Carmen González-Murua
Revue:
Idesia

ISSN: 0073-4675,  0718-3429

Année de publication: 2015

Volumen: 33

Número: 2

Pages: 9-20

Type: Article

DOI: 10.4067/S0718-34292015000200002 DIALNET GOOGLE SCHOLAR lock_openDialnet editor

D'autres publications dans: Idesia

Résumé

La estructura celular y las alteraciones en la organización del tejido de raíz 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 suministró como ácido bórico para obtener 20 (334 µM) y 40 (668 µM) B mg kg-1 en la solución de nutrientes durante 20 días. 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 aplicación de B bajo condiciones sin sal y baja salinidad no dio lugar a cambios en la estructura de las células de la corteza de la raíz ni el cilindro vascular. Bajo condiciones de alta salinidad células de la raíz amylacea mostraron alteraciones leves, como un aumento en el número de filas de células. Estas condiciones de alta salinidad no resultaron en el espesor de la estela.

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