Selection of maize hybrids for tolerance to aluminum in minimal solution.
The aim of this study was to determine the Al concentration and the period of exposure of the roots of maize hybrids in minimal solution for efficient selection of genotypes that are Al-tolerant. Two experiments were performed (48 and 96 h of exposure) with increasing doses of Al in minimal solution; the block design was completely randomized in a split-plot design with 3 replications. By assessing differences in root growth (cm) and the percentage of inhibition of the growth of the main root (%), a marked decrease was observed in maize root growth with increasing Al concentration in the solution. Exposure of the roots to 2 mg/L Al for 48 h in minimal solution was the most efficient for selecting sources of tolerance, particularly for the hybrids H 44 and H 38.
Programa de Pós-Graduação em Agronomia, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brasil.
C J
CJ
Coelho
Programa de Pós-Graduação em Biologia Evolutiva, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brasil.
D
D
Molin
Programa de Pós-Graduação em Agronomia, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brasil.
H A
HA
Wood Joris
Programa de Pós-Graduação em Agronomia, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brasil.
E F
EF
Caires
Programa de Pós-Graduação em Agronomia, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brasil.
J R
JR
Gardingo
Programa de Pós-Graduação em Agronomia, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brasil rrmatiel@uepg.br.
R R
RR
Matiello
D000222:Adaptation, Physiological / Q000187:drug effects*; D000535:Aluminum / Q000633:toxicity*; D000704:Analysis of Variance; D006824:Hybridization, Genetic / Q000187:drug effects*; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development; D012044:Regression Analysis; D012641:Selection, Genetic / Q000187:drug effects*; D012996:Solutions; D003313:Zea mays / Q000187:drug effects / Q000235:genetics* / Q000502:physiology*
D012996:Solutions; D000535:Aluminum