| Autor: |
Santos CS; Universidade Estadual de Santa Cruz - UESC, Departamento de Ciências Biológicas, Ilhéus, BA, Brasil., Dalmolin AC; Universidade Federal do Sul da Bahia - UFSB, Centro de Formação em Ciências Agroflorestais, Ilhéus, BA, Brasil., Schilling AC; Universidade Estadual de Santa Cruz - UESC, Departamento de Ciências Exatas e Tecnológicas, Ilhéus, BA, Brasil., Santos MS; Universidade Estadual de Santa Cruz - UESC, Departamento de Ciências Biológicas, Ilhéus, BA, Brasil., Schaffer B; University of Florida, Institute of Food and Agricultural Sciences - IFAS, Tropical Research and Education Center, Homestead, FL, USA., Mielke MS; Universidade Estadual de Santa Cruz - UESC, Departamento de Ciências Biológicas, Ilhéus, BA, Brasil. |
| Abstrakt: |
Root deformation (RD) caused by errors in the pricking out process are irreversible and very difficult to detect in container-grown seedlings at the time of planting in the field. The objective of this study was to evaluate the effects of RD on leaf gas exchange, growth, biomass allocation and mineral nutrition of G. americana seedlings during the recovery phase after soil flooding. Four-months-old seedlings, with and without RD, were flooded for 42 days and their recovery was evaluated 28 days after soil drainage. There were no significant interactions between RD and soil flooding for all leaf gas exchange, growth and mineral nutrition after soil drainage, with the exception of leaf P concentrations. In plants with no RD, the P concentration in leaves of non-flooded plants was significantly higher than that of plants with RD. Soil flooding and RD did not influence leaf or root N concentrations or whole-plant N content. RD increased the K concentration in the roots, but not in the leaves. Changes in the nutrient concentrations in leaves and roots indicate that RD may affect physiological performance of seedlings after planting in the field. |
