Timing of simulated aboveground herbivory influences population dynamics of root-feeding nematodes

Minggang Wang (Corresponding author), A. Biere, W.H. van der Putten, T. Martijn Bezemer, E.P. Brinkman

Research output: Contribution to journal/periodicalArticleScientificpeer-review

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Abstract

Aims

Plant damage inflicted by aboveground herbivores can occur at different stages of plant development and can induce plant responses that affect the growth of belowground herbivores. This study explores impacts of aboveground herbivory at different plant development stages on the population dynamics of root-feeding nematodes.

Methods

We simulated aboveground herbivory by clipping the foliage of the grass species Holcus lanatus, and tested how plant defoliation at different times (1, 4 or 7 weeks after nematode inoculation) influenced the population of two root-feeding nematode species: the endoparasitic Pratylenchus penetrans and the ectoparasitic Tylenchorhynchus dubius.

Results

Defoliation increased the total abundance of P. penetrans and the number per unit root mass (density) of both P. penetrans and T. dubius. Defoliation enhanced the density of P. penetrans, however, only when plants were defoliated early. Timing did not influence the density of T. dubius, although both abundance and density increased over time. Defoliation increased the nitrogen concentration of plant roots, but reduced root biomass. The strongest reduction of root biomass occurred after early defoliation.

Conclusions

Our study indicates that plant responses to aboveground herbivory and their effects on belowground herbivores can be influenced by the time when plants are defoliated, as well as by the belowground herbivore species and their interactions.
Original languageEnglish
Pages (from-to)215-228
JournalPlant and Soil
Volume415
Issue number1-2
DOIs
Publication statusPublished - 2017

Keywords

  • NIOO

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