The use of leaf surface contact cues during oviposition explains field preferences in the willow sawfly Nematus oligospilus

The use of leaf surface contact cues during oviposition explains field preferences in the willow sawfly Nematus oligospilus

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After an insect herbivore has reached its host plant, contact cues from the leaf surface often determine host acceptance. We studied contact cues during oviposition behavior of a willow pest, the sawfly Nematus oligospilus (Hymenoptera: Tenthredinidae), a specialist feeder on Salix (Salicaceae) trees, and how it determines oviposition preference in lab and field conditions. We described the sequence of behaviors that lead to egg laying on the most and least preferred willow species. Then we studied the morphology of chemosensory structures present on the female antenna, cerci and ovipositor. Since phenolic glycosides (PGs) are the main secondary metabolites present in Salicaceae species, we investigated their role in host acceptance. We quantified these compounds in different willow species and correlated PG content with oviposition preference under lab and natural field conditions. We demonstrated a major role for contact cues in triggering N. oligospilus egg laying on the leaf surface of preferred willow genotypes. Firstly cues are sensed by antennae, determining to leave or stay on the leaf. After that, sensing is performed by abdominal cerci, which finally triggers egg laying. The lack of PGs in non-preferred species and the significant correlation observed between PGs, natural damage and oviposition preference suggest a role for these compounds in host selection. Our study suggests that in specialist feeders, secondary compounds normally acting as defenses can actually act as a susceptibility factor by triggering specific insect behavior for oviposition. These defensive compounds could be selected against to increase resistance.

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Main Authors: Fernández, Patricia Carina, Braccini, Celina L., Dávila, Camila, Barrozo, Romina B., Coll Aráoz, María Victoria, Cerrillo, Teresa T., Gershenzon, Jonathan, Reichelt, Michael, Zavala, Jorge Alberto
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Language:eng
Subjects:LEAF SURFACE, INSECT HERBIVORE, OVIPOSITION, NEMATUS OLIGOSPILUS, ,
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id KOHA-OAI-AGRO:54566
record_format koha
institution UBA FA
collection Koha
country Argentina
countrycode AR
component Bibliográfico
access En linea
En linea
databasecode cat-ceiba
tag biblioteca
region America del Sur
libraryname Biblioteca Central FAUBA
language eng
topic LEAF SURFACE
INSECT HERBIVORE
OVIPOSITION
NEMATUS OLIGOSPILUS

LEAF SURFACE
INSECT HERBIVORE
OVIPOSITION
NEMATUS OLIGOSPILUS
spellingShingle LEAF SURFACE
INSECT HERBIVORE
OVIPOSITION
NEMATUS OLIGOSPILUS

LEAF SURFACE
INSECT HERBIVORE
OVIPOSITION
NEMATUS OLIGOSPILUS
Fernández, Patricia Carina
Braccini, Celina L.
Dávila, Camila
Barrozo, Romina B.
Coll Aráoz, María Victoria
Cerrillo, Teresa T.
Gershenzon, Jonathan
Reichelt, Michael
Zavala, Jorge Alberto
The use of leaf surface contact cues during oviposition explains field preferences in the willow sawfly Nematus oligospilus
description After an insect herbivore has reached its host plant, contact cues from the leaf surface often determine host acceptance. We studied contact cues during oviposition behavior of a willow pest, the sawfly Nematus oligospilus (Hymenoptera: Tenthredinidae), a specialist feeder on Salix (Salicaceae) trees, and how it determines oviposition preference in lab and field conditions. We described the sequence of behaviors that lead to egg laying on the most and least preferred willow species. Then we studied the morphology of chemosensory structures present on the female antenna, cerci and ovipositor. Since phenolic glycosides (PGs) are the main secondary metabolites present in Salicaceae species, we investigated their role in host acceptance. We quantified these compounds in different willow species and correlated PG content with oviposition preference under lab and natural field conditions. We demonstrated a major role for contact cues in triggering N. oligospilus egg laying on the leaf surface of preferred willow genotypes. Firstly cues are sensed by antennae, determining to leave or stay on the leaf. After that, sensing is performed by abdominal cerci, which finally triggers egg laying. The lack of PGs in non-preferred species and the significant correlation observed between PGs, natural damage and oviposition preference suggest a role for these compounds in host selection. Our study suggests that in specialist feeders, secondary compounds normally acting as defenses can actually act as a susceptibility factor by triggering specific insect behavior for oviposition. These defensive compounds could be selected against to increase resistance.
format Texto
topic_facet
LEAF SURFACE
INSECT HERBIVORE
OVIPOSITION
NEMATUS OLIGOSPILUS
author Fernández, Patricia Carina
Braccini, Celina L.
Dávila, Camila
Barrozo, Romina B.
Coll Aráoz, María Victoria
Cerrillo, Teresa T.
Gershenzon, Jonathan
Reichelt, Michael
Zavala, Jorge Alberto
author_facet Fernández, Patricia Carina
Braccini, Celina L.
Dávila, Camila
Barrozo, Romina B.
Coll Aráoz, María Victoria
Cerrillo, Teresa T.
Gershenzon, Jonathan
Reichelt, Michael
Zavala, Jorge Alberto
author_sort Fernández, Patricia Carina
title The use of leaf surface contact cues during oviposition explains field preferences in the willow sawfly Nematus oligospilus
title_short The use of leaf surface contact cues during oviposition explains field preferences in the willow sawfly Nematus oligospilus
title_full The use of leaf surface contact cues during oviposition explains field preferences in the willow sawfly Nematus oligospilus
title_fullStr The use of leaf surface contact cues during oviposition explains field preferences in the willow sawfly Nematus oligospilus
title_full_unstemmed The use of leaf surface contact cues during oviposition explains field preferences in the willow sawfly Nematus oligospilus
title_sort use of leaf surface contact cues during oviposition explains field preferences in the willow sawfly nematus oligospilus
url http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=54566
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
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spelling KOHA-OAI-AGRO:545662023-11-23T14:51:00Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=54566http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=AAGThe use of leaf surface contact cues during oviposition explains field preferences in the willow sawfly Nematus oligospilusFernández, Patricia CarinaBraccini, Celina L.Dávila, CamilaBarrozo, Romina B.Coll Aráoz, María VictoriaCerrillo, Teresa T.Gershenzon, JonathanReichelt, MichaelZavala, Jorge Albertotextengapplication/pdfAfter an insect herbivore has reached its host plant, contact cues from the leaf surface often determine host acceptance. We studied contact cues during oviposition behavior of a willow pest, the sawfly Nematus oligospilus (Hymenoptera: Tenthredinidae), a specialist feeder on Salix (Salicaceae) trees, and how it determines oviposition preference in lab and field conditions. We described the sequence of behaviors that lead to egg laying on the most and least preferred willow species. Then we studied the morphology of chemosensory structures present on the female antenna, cerci and ovipositor. Since phenolic glycosides (PGs) are the main secondary metabolites present in Salicaceae species, we investigated their role in host acceptance. We quantified these compounds in different willow species and correlated PG content with oviposition preference under lab and natural field conditions. We demonstrated a major role for contact cues in triggering N. oligospilus egg laying on the leaf surface of preferred willow genotypes. Firstly cues are sensed by antennae, determining to leave or stay on the leaf. After that, sensing is performed by abdominal cerci, which finally triggers egg laying. The lack of PGs in non-preferred species and the significant correlation observed between PGs, natural damage and oviposition preference suggest a role for these compounds in host selection. Our study suggests that in specialist feeders, secondary compounds normally acting as defenses can actually act as a susceptibility factor by triggering specific insect behavior for oviposition. These defensive compounds could be selected against to increase resistance.After an insect herbivore has reached its host plant, contact cues from the leaf surface often determine host acceptance. We studied contact cues during oviposition behavior of a willow pest, the sawfly Nematus oligospilus (Hymenoptera: Tenthredinidae), a specialist feeder on Salix (Salicaceae) trees, and how it determines oviposition preference in lab and field conditions. We described the sequence of behaviors that lead to egg laying on the most and least preferred willow species. Then we studied the morphology of chemosensory structures present on the female antenna, cerci and ovipositor. Since phenolic glycosides (PGs) are the main secondary metabolites present in Salicaceae species, we investigated their role in host acceptance. We quantified these compounds in different willow species and correlated PG content with oviposition preference under lab and natural field conditions. We demonstrated a major role for contact cues in triggering N. oligospilus egg laying on the leaf surface of preferred willow genotypes. Firstly cues are sensed by antennae, determining to leave or stay on the leaf. After that, sensing is performed by abdominal cerci, which finally triggers egg laying. The lack of PGs in non-preferred species and the significant correlation observed between PGs, natural damage and oviposition preference suggest a role for these compounds in host selection. Our study suggests that in specialist feeders, secondary compounds normally acting as defenses can actually act as a susceptibility factor by triggering specific insect behavior for oviposition. These defensive compounds could be selected against to increase resistance.LEAF SURFACEINSECT HERBIVOREOVIPOSITIONNEMATUS OLIGOSPILUSScientific reports

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