Caterpillar-induced plant volatiles remain a reliable signal for foraging wasps during dual attack with a plant pathogen or non-host insect herbivore

C.A.M. Ponzio, R. Gols, B.T. Weldegergis, M. Dicke

Research output: Contribution to journalArticleAcademicpeer-review

51 Citations (Scopus)

Abstract

Plants respond to herbivory with the emission of plant volatiles, which can be used by the herbivores' natural enemies to locate their hosts or prey. In nature, plants are often simultaneously confronted with insect herbivores and phytopathogens, potentially interfering with the attraction of the herbivores' enemies as a result of modifications of the induced volatile blend. Here, we investigated parasitoid (Cotesia glomerata) attraction to volatiles of plants challenged by different attackers, either alone or in combination with Pieris brassicae caterpillars, hosts of C.¿glomerata. We used a natural system consisting of Brassica nigra plants, eggs and larvae of P.¿brassicae, Brevicoryne brassicae aphids and the bacterial phytopathogen Xanthomonas campestris pv. campestris. In all cases, parasitoids successfully located host-infested plants, and wasp foraging behaviour was unaffected by the simultaneous presence of a non-host attacker or host eggs. Analysis of the volatile emissions show that the volatile blends of caterpillar-infested treatments were different from those without caterpillars. Furthermore, dually attacked plants could not be separated from those with only caterpillars, regardless of non-host identity, supporting the behavioural data. Our results suggest that, in this system, indirect plant defences may be more resistant to interference than is generally assumed, with volatiles induced during dual attack remaining reliable indicators of host presence for parasitoids.
Original languageEnglish
Pages (from-to)1924-1935
JournalPlant, Cell & Environment
Volume37
Issue number8
DOIs
Publication statusPublished - 2014

Fingerprint

Wasps
Herbivory
plant pathogens
Insects
insect larvae
herbivores
foraging
insects
parasitoids
Eggs
Cotesia glomerata
Xanthomonas campestris pv. campestris
Brassica nigra
Brevicoryne brassicae
Pieris brassicae
Xanthomonas campestris
Aphids
Mustard Plant
natural enemies
Aphidoidea

Keywords

  • interspecific interactions
  • pseudomonas-syringae
  • arabidopsis-thaliana
  • phytophagous insects
  • multiple herbivory
  • cotesia-glomerata
  • pieris-brassicae
  • fungal-infection
  • natural enemies
  • damaged plants

Cite this

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title = "Caterpillar-induced plant volatiles remain a reliable signal for foraging wasps during dual attack with a plant pathogen or non-host insect herbivore",
abstract = "Plants respond to herbivory with the emission of plant volatiles, which can be used by the herbivores' natural enemies to locate their hosts or prey. In nature, plants are often simultaneously confronted with insect herbivores and phytopathogens, potentially interfering with the attraction of the herbivores' enemies as a result of modifications of the induced volatile blend. Here, we investigated parasitoid (Cotesia glomerata) attraction to volatiles of plants challenged by different attackers, either alone or in combination with Pieris brassicae caterpillars, hosts of C.¿glomerata. We used a natural system consisting of Brassica nigra plants, eggs and larvae of P.¿brassicae, Brevicoryne brassicae aphids and the bacterial phytopathogen Xanthomonas campestris pv. campestris. In all cases, parasitoids successfully located host-infested plants, and wasp foraging behaviour was unaffected by the simultaneous presence of a non-host attacker or host eggs. Analysis of the volatile emissions show that the volatile blends of caterpillar-infested treatments were different from those without caterpillars. Furthermore, dually attacked plants could not be separated from those with only caterpillars, regardless of non-host identity, supporting the behavioural data. Our results suggest that, in this system, indirect plant defences may be more resistant to interference than is generally assumed, with volatiles induced during dual attack remaining reliable indicators of host presence for parasitoids.",
keywords = "interspecific interactions, pseudomonas-syringae, arabidopsis-thaliana, phytophagous insects, multiple herbivory, cotesia-glomerata, pieris-brassicae, fungal-infection, natural enemies, damaged plants",
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year = "2014",
doi = "10.1111/pce.12301",
language = "English",
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pages = "1924--1935",
journal = "Plant, Cell & Environment",
issn = "0140-7791",
publisher = "Wiley",
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Caterpillar-induced plant volatiles remain a reliable signal for foraging wasps during dual attack with a plant pathogen or non-host insect herbivore. / Ponzio, C.A.M.; Gols, R.; Weldegergis, B.T.; Dicke, M.

In: Plant, Cell & Environment, Vol. 37, No. 8, 2014, p. 1924-1935.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Caterpillar-induced plant volatiles remain a reliable signal for foraging wasps during dual attack with a plant pathogen or non-host insect herbivore

AU - Ponzio, C.A.M.

AU - Gols, R.

AU - Weldegergis, B.T.

AU - Dicke, M.

PY - 2014

Y1 - 2014

N2 - Plants respond to herbivory with the emission of plant volatiles, which can be used by the herbivores' natural enemies to locate their hosts or prey. In nature, plants are often simultaneously confronted with insect herbivores and phytopathogens, potentially interfering with the attraction of the herbivores' enemies as a result of modifications of the induced volatile blend. Here, we investigated parasitoid (Cotesia glomerata) attraction to volatiles of plants challenged by different attackers, either alone or in combination with Pieris brassicae caterpillars, hosts of C.¿glomerata. We used a natural system consisting of Brassica nigra plants, eggs and larvae of P.¿brassicae, Brevicoryne brassicae aphids and the bacterial phytopathogen Xanthomonas campestris pv. campestris. In all cases, parasitoids successfully located host-infested plants, and wasp foraging behaviour was unaffected by the simultaneous presence of a non-host attacker or host eggs. Analysis of the volatile emissions show that the volatile blends of caterpillar-infested treatments were different from those without caterpillars. Furthermore, dually attacked plants could not be separated from those with only caterpillars, regardless of non-host identity, supporting the behavioural data. Our results suggest that, in this system, indirect plant defences may be more resistant to interference than is generally assumed, with volatiles induced during dual attack remaining reliable indicators of host presence for parasitoids.

AB - Plants respond to herbivory with the emission of plant volatiles, which can be used by the herbivores' natural enemies to locate their hosts or prey. In nature, plants are often simultaneously confronted with insect herbivores and phytopathogens, potentially interfering with the attraction of the herbivores' enemies as a result of modifications of the induced volatile blend. Here, we investigated parasitoid (Cotesia glomerata) attraction to volatiles of plants challenged by different attackers, either alone or in combination with Pieris brassicae caterpillars, hosts of C.¿glomerata. We used a natural system consisting of Brassica nigra plants, eggs and larvae of P.¿brassicae, Brevicoryne brassicae aphids and the bacterial phytopathogen Xanthomonas campestris pv. campestris. In all cases, parasitoids successfully located host-infested plants, and wasp foraging behaviour was unaffected by the simultaneous presence of a non-host attacker or host eggs. Analysis of the volatile emissions show that the volatile blends of caterpillar-infested treatments were different from those without caterpillars. Furthermore, dually attacked plants could not be separated from those with only caterpillars, regardless of non-host identity, supporting the behavioural data. Our results suggest that, in this system, indirect plant defences may be more resistant to interference than is generally assumed, with volatiles induced during dual attack remaining reliable indicators of host presence for parasitoids.

KW - interspecific interactions

KW - pseudomonas-syringae

KW - arabidopsis-thaliana

KW - phytophagous insects

KW - multiple herbivory

KW - cotesia-glomerata

KW - pieris-brassicae

KW - fungal-infection

KW - natural enemies

KW - damaged plants

U2 - 10.1111/pce.12301

DO - 10.1111/pce.12301

M3 - Article

VL - 37

SP - 1924

EP - 1935

JO - Plant, Cell & Environment

JF - Plant, Cell & Environment

SN - 0140-7791

IS - 8

ER -