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A conserved pattern in plant-mediated interactions between herbivores

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Lu,  Jing
Department of Molecular Ecology, Prof. I. T. Baldwin, MPI for Chemical Ecology, Max Planck Society;
Research Group Dr. M. Erb, Shoot Root Communication, Department of Molecular Ecology, Prof. I. T. Baldwin, MPI for Chemical Ecology, Max Planck Society;

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Robert,  Christelle
Department of Biochemistry, Prof. J. Gershenzon, MPI for Chemical Ecology, Max Planck Society;

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Erb,  Matthias
Research Group Dr. M. Erb, Shoot Root Communication, Department of Molecular Ecology, Prof. I. T. Baldwin, MPI for Chemical Ecology, Max Planck Society;

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Citation

Lu, J., Robert, C., Lou, Y., & Erb, M. (2016). A conserved pattern in plant-mediated interactions between herbivores. Ecology and Evolution, 6(4), 1032-1040. doi:10.1002/ece3.1922.


Cite as: https://hdl.handle.net/21.11116/0000-0003-B4D0-6
Abstract
Plant-mediated interactions between herbivores are important determinants of
community structure and plant performance in natural and agricultural systems.
Current research suggests that the outcome of the interactions is determined
by herbivore and plant identity, which may result in stochastic patterns
that impede adaptive evolution and agricultural exploitation. However, few
studies have systemically investigated specificity versus general patterns in a
given plant system by varying the identity of all involved players. We investigated
the influence of herbivore identity and plant genotype on the interaction
between leaf-chewing and root-feeding herbivores in maize using a partial factorial
design. We assessed the influence of leaf induction by oral secretions of
six different chewing herbivores on the response of nine different maize genotypes
and three different root feeders. Contrary to our expectations, we found a
highly conserved pattern across all three dimensions of specificity: The majority
of leaf herbivores elicited a negative behavioral response from the different root
feeders in the large majority of tested plant genotypes. No facilitation was
observed in any of the treatment combinations. However, the oral secretions of
one leaf feeder and the responses of two maize genotypes did not elicit a
response from a root-feeding herbivore. Together, these results suggest that
plant-mediated interactions in the investigated system follow a general pattern,
but that a degree of specificity is nevertheless present. Our study shows that
within a given plant species, plant-mediated interactions between herbivores of
the same feeding guild can be stable. This stability opens up the possibility of
adaptations by associated organisms and suggests that plant-mediated interactions
may contribute more strongly to evolutionary dynamics in terrestrial
(agro)ecosystems than previously assumed.