Early evaluation of root morphology of maize genotypes under phosphorus deficiency

Magalhaes, P.C.,National Maize and Sorghum Research Center, Sete Lagoas; De Souza, T.C.,Federal Univ. of Lavras . Biology Dept.; Cantao, F.R.O.,University of Illinois, Urbana-Champaign

Early evaluation of root morphology of maize genotypes under phosphorus deficiency

2011

Magalhaes, P.C.,National Maize and Sorghum Research Center, Sete Lagoas (Brazil) | De Souza, T.C.,Federal Univ. of Lavras (Brazil). Biology Dept. | Cantao, F.R.O.,University of Illinois, Urbana-Champaign (USA)

The aim of this paper was to evaluate the effect of two levels of phosphorus in soil (high and low P levels) on dry mass attributes and root characteristics in eight maize lines with different genetic backgrounds and origins. The experimental design was randomized blocks with three replications. The evaluation was performed 21 days after sowing. The WinRhizo program of images analysis was used for the root morphology. There were no differences between the two P levels for the dry mass attributes. However, root morphology of L13.1.2 strain performed the highest surface area and total root length, length of thin and very thin roots in low P concentration. The digital image analyses of root systems allowed efficient discrimination of maize genotypes in environments with low P levels.

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