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Is flower scent influencing host plant selection of leaf-galling sawflies (Hymenoptera, Tenthredinidae) on willows?

Title data

Kehl, Alexandra ; Dötterl, Stefan ; Aas, Gregor ; Rambold, Gerhard:
Is flower scent influencing host plant selection of leaf-galling sawflies (Hymenoptera, Tenthredinidae) on willows?
In: Chemoecology. Vol. 20 (2010) Issue 3 . - pp. 215-221.
ISSN 1423-0445
DOI: https://doi.org/10.1007/s00049-010-0050-6

Abstract in another language

Though it is known that flower scent not only attracts pollinators but also herbivores, little is known about the importance of flower scent on the distribution of leaf herbivores among individuals within a plant species. In this study we determined the distribution of galls induced by the sawfly Pontania proxima (Serville 1823) (Hymenoptera,Tenthredinidae, Nematinae) on flowering and nonflowering representatives of several clones belonging to Salix fragilis and S. 9 rubens (Salicaceae). Further, amounts and composition of scent of flowering and nonfloweringtwigs were compared (dynamic headspace-gaschromatography–mass spectrometry, DHS-GC–MS), and ascent sample collected from flowering twigs of S. fragilis was tested by coupled gas chromatography and electroantennographic detection (GC-EAD) on the antennae of P. proxima females. The results show that the presence off lower catkins on plants led to a higher degree of allocation with galls, but the number of galls differed not between flowering and non-flowering plants. The DHS-GC–MSanalyses revealed that the total amount of flower scentemitted per flowering twig is about 90 times higher than the scent emitted by a non-flowering twig. Further, several compounds were emitted only by flowering but not by nonfloweringtwigs. In the GC-EAD analyses, antennae consistently responded not only to green leaf volatiles, but alsoto compounds emitted only by the flowers (e.g. 1,4-dimethoxybenzene). These flower scent compounds are suggested to affect the host plant choice by attracting more sawflies from the distance to flowering plants compared to non-flowering plants. The EAD-active compounds emitted from vegetative plant parts are assumed to act as long distance signals especially when flowers are absent on hostplants, e.g. during the oviposition period of the second generation of P. proxima.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER82438
BAYCEER101799
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Systematics
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Professorship Mycology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Professorship Mycology > Professorship Mycology - Univ.-Prof. Dr. Gerhard Rambold
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Research Institutions > Research Centres > Institute of African Studies - IAS
Service Facilities
Service Facilities > Ökologisch-Botanischer Garten
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 21 May 2015 06:35
Last Modified: 24 Nov 2015 16:24
URI: https://eref.uni-bayreuth.de/id/eprint/14122