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ALUMINIUM TOLERANCE OF OAT CULTIVARS UNDER HYDROPONIC AND ACID SOIL CONDITIONS

Published online by Cambridge University Press:  02 March 2015

I. C. NAVA*
Affiliation:
Department of Crop Science, Agronomy School, Federal University of Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves 7712, Porto Alegre, RS, 91501-970, Brazil
C. A. DELATORRE
Affiliation:
Department of Crop Science, Agronomy School, Federal University of Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves 7712, Porto Alegre, RS, 91501-970, Brazil
M. T. PACHECO
Affiliation:
Department of Crop Science, Agronomy School, Federal University of Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves 7712, Porto Alegre, RS, 91501-970, Brazil
P. L. SCHEEREN
Affiliation:
National Wheat Research Center, Embrapa, Rodovia BR-285, Km 294, Passo Fundo, RS, 99001, Brazil
L. C. FEDERIZZI
Affiliation:
Department of Crop Science, Agronomy School, Federal University of Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves 7712, Porto Alegre, RS, 91501-970, Brazil
*
Corresponding author. Email: itamar.nava@ufrgs.br

Summary

Aluminium toxicity is an important abiotic factor limiting the growth and yield of oat plants (Avena sativa L.) and other cultivated species. The objectives of this study were to evaluate the response of oat cultivars at the reproductive stage to aluminium under acid soil conditions and to compare with the responses observed at seedling stage under hydroponic conditions. In the soil, the damage to the above-ground part of the plant was estimated by the morphological response to aluminium, shoot length, shoot dry mass and plant height and, to the below-ground part of the plant as the length of roots and root dry mass. In hydroponics, the primary root regrowth was used to define the level of tolerance. The comparison of the results obtained in acid soil with those obtained in hydroponics demonstrated that both conditions produced essentially the same responses. The use of hydroponic solution can be a valuable tool for phenotyping large populations, especially useful for breeding programmes located in regions were aluminium is not present at toxic levels in the soil.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2015 

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