Kehl, A; Dötterl, S; Aas, G; Rambold, G: Is flower scent influencing host plant selection of leaf-galling sawflies (Hymenoptera, Tenthredinidae) on willows?, Chemoecology, 20, 215-221 (2010)
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 nonflowering twigs were compared (dynamic headspace-gas chromatography–mass spectrometry, DHS-GC–MS), and a scent 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 of flower 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–MS analyses revealed that the total amount of flower scent emitted 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 nonflowering twigs. In the GC-EAD analyses, antennae consistently responded not only to green leaf volatiles, but also to 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 longdistance signals especially when flowers are absent on host plants, e.g. during the oviposition period of the second generation of P. proxima.
Aktuelle Termine

Bayreuther Stadtgespräch(e):
Mi. 04.03.2020
Das Kunststoffzeitalter: Unsachliche Berichterstattungen zum Thema Mikroplastik verunsichern Verbraucher. Was Forscher wirklich (nicht) wissen und zukunftsweisende Lösungsansätze.
Ökologisch-Botanischer Garten:
So. 01.03.2020
Moore, Wälder & Co.: Ihre Leistungen für Natur und Mensch
So. 08.03.2020
"Einzig-ART-ige Natur": Malereei von Steffi Rodigas, Vernissage - Ausstellungseröffnung
So. 05.04.2020
3x3=0: Wildkräuter für die Gründonnerstagssuppe
Fr. 17.04.2020
Mit tausend Schritten durch die Erdgeschichte: Gesteine im ÖBG
BayCEER Blog
Why Science Communication?
Stoichiometric controls of C and N cycling
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
EGU – interesting research and free coffee
RSS Blog als RSS Feed
Wetter Versuchsflächen
Luftdruck (356m): 967.5 hPa
Lufttemperatur: 11.7 °C
Niederschlag: 0.5 mm/24h
Sonnenschein: 4 h/d
Wind (Höhe 17m): 33.4 km/h
Wind (Max.): 80.3 km/h
Windrichtung: SW

Globalstrahlung: 22 W/m²
Lufttemperatur: 7.0 °C
Niederschlag: 6.8 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 32.9 km/h

Diese Webseite verwendet Cookies. weitere Informationen