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Aluminum influence on Hancornia speciosa seedling emergence, nutrient accumulation, growth and root anatomy

2017; Elsevier BV; Volume: 236-237; Linguagem: Inglês

10.1016/j.flora.2017.09.008

1618-0585

Arthur Almeida Rodrigues, Sebastião Carvalho Vasconcelos Filho, Cássia Lino Rodrigues, Douglas Almeida Rodrigues, Glicélia Pereira Silva, Juliana de Fátima Sales, Kelly Juliane Telles Nascimento, Eduardo Matheus Guimarães Teles, Larissa Saeki Rehn,

Plant Stress Responses and Tolerance

Aluminum (Al) exposure effects on Hancornia speciosa Gomes were investigated via culture in a nutrient solution containing 0 (control), 300 and 600 μmol Al L−1. Seedling emergence, nutrient accumulation, growth and root anatomy were evaluated. Seedling emergence, emergence speed index and root diameter under hydroponic cultivation were significantly reduced in the Al treatments, while Al promoted root growth at the lowest concentration. Al also altered macronutrient translocation in the analyzed plant organs, particularly stem and leaves. This indicates that H. speciosa seeds display sensitivity to Al3+, with negative effects on seedling emergence. The presence of Al in the cell walls and chloroplasts and/or the accumulation of phenolic compounds and starch represent a set of mechanisms that may possibly play a role in plant Al detoxification, allowing H. speciosa to survive in the presence of high concentrations of this cation.