Tolerância ao alumínio em genótipos de cereais de inverno sob cultivo hidropônico e campo

• Main Author: Portaluppi, Roberto
• Publication Date: 2011
• Other Authors: Brammer, Sandra Patussi, Magalhães, Jurandir Vieira de, Costa, Cibele Tesser de, Caierão, Eduardo, Junior, Alfredo do Nascimento, da Silva Junior, José Pereira
• Format: Article
• Language: por
• Source: Pesquisa Agropecuária Brasileira (Online)
• Download full: https://apct.sede.embrapa.br/pab/article/view/5092
• topic: Hordeum vulgare; Secale cereale; Triticum aestivum; crestamento; resistência; suscetibilidade; toxicidade; Hordeum vulgare; Secale cereale; Triticum aestivum; blight; resistance; sensitivity; toxicity

The objective of this work was to determine the root growth capacity of 75 genotypes of small graine cereals in hydroponic culture under different aluminum concentrations, and to assess the relationship betwen the level of tolerance/sensitivity in hydroponic solution and the resistance/susceptibility index in the field. Barley, triticale, rye, wheat and Aegilops tauschii were evaluated in hydroponics, with Al3+ concentrations that varied between 0.5 (barley), 2 and 6 (triticale), 6 and 10 (rye) and 2 mg L-1 (wheat and Ae. tauschii). The experiments' designs were completely randomized. In the field trial, the same genotypes were assessed, except for Ae. tauschii, in soil with pH 4.4 and 4.85 adjusted to 1/2 and 1/4 of the SMP index. A score scale ranging from 0.5 (highly resistant) to 5 (highly susceptible) was used. A strong relationship between aluminum tolerance in hydroponics and resistance to blight in the field was observed. Cereals selection in hydroponic medium can be considered an efficient tool to support breeding programs for this characteristic.