Metal bioaccumulation alleviates the negative efects of herbivory on plant growth.
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2021
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Metalliferous soils can selectively shape plant species’ physiology towards tolerance of high metal
concentrations that are usually toxic to organisms. Some adapted plant species tolerate and
accumulate metal in their tissues. These metals can serve as an elemental defence but can also
decrease growth. Our investigation explored the capacity of natural metal accumulation in a tropical
tree species, Eremanthus erythropappus (Asteraceae) and the efects of such bioaccumulation on
plant responses to herbivory. Seedlings of E. erythropappus were grown in a glasshouse on soils that
represented a metal concentration gradient (Al, Cu, Fe, Mn and Zn), and then the exposed plants were
fed to the herbivores in a natural habitat. The efect of herbivory on plant growth was signifcantly
mediated by foliar metal ion concentrations. The results suggest that herbivory efects on these
plants change from negative to positive depending on soil metal concentration. Hence, these results
provide quantitative evidence for a previously unsuspected interaction between herbivory and metal
bioaccumulation on plant growth.
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DUELI, G. de F.; SOUZA, O. F. F. de; RIBEIRO, S. P. Metal bioaccumulation alleviates the negative efects of herbivory on plant growth. Scientifc Reports, v. 11, 2021. Disponível em: <https://www.nature.com/articles/s41598-021-98483-x>. Acesso em: 29 abr. 2022.