SciELO - Scientific Electronic Library Online

 
vol.72 número3Evaluación de Kits de Terreno para el Análisis Rápido de Purines en Lecherías del Sur de Chile índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

Compartir


Chilean journal of agricultural research

versión On-line ISSN 0718-5839

Resumen

SEGUEL, Alex et al. Effects of Soil Aluminum on Early Arbuscular Mycorrhizal Colonization of Wheat an Barley Cultivars Growing in an Andisol. Chilean J. Agric. Res. [online]. 2012, vol.72, n.3, pp.449-455. ISSN 0718-5839.  http://dx.doi.org/10.4067/S0718-58392012000300022.

Aluminum phytotoxicity in acid soils is an important environmental stress that negatively affects crop production, but arbuscular mycorrhizal (AM) fungi performance would allow plants to better withstand this environmental condition. This study aimed to analyze the effect of soil Al on early AM colonization of wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) cultivars. Near-isogenic Crac, Invento, and Porfiado wheat cultivars and Sebastián and Aurora barley cultivars were sown in pots in an acid soil at three Al saturation levels (60, 34, and 11%). At 20 d after sowing (DAS) ’Crac’ presented higher AM colonization (27%) than other cultivars. However, ’Invento’ had the fastest colonization at 41 DAS, which was inhibited in short term at lower Al-saturation. Moreover, roots of ’Aurora’ were colonized 28 and 51% at 20 and 66 DAS, respectively, and also decreased at lower Al-saturation. In soil with 60% Al-saturation a great spore production was observed at 41 DAS, ’Aurora’ had the highest spore density at 66 DAS. At 20 DAS a negative relationship (r = -0.37; p < 0.001) was observed between the early root colonization and root weight. In addition, such relation was stronger (r = -0.49; p < 0.001) when plants were grown at high Al saturation. An early AM colonization was observed in all cultivars essayed when growing at high Al saturation being higher in cultivars apparently more Al tolerant, suggesting that an early AM colonization can be an important factor in Al tolerance for agricultural plants cropped in acid soils.

Palabras clave : Acid soils; arbuscular mycorrhizal propagules; cereal crop; soil aluminum saturation.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons