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Isoprene emission by poplar is not important for the feeding behaviour of poplar leaf beetles

Overview of attention for article published in BMC Plant Biology, June 2015
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Title
Isoprene emission by poplar is not important for the feeding behaviour of poplar leaf beetles
Published in
BMC Plant Biology, June 2015
DOI 10.1186/s12870-015-0542-1
Pubmed ID
Authors

Anna Müller, Moritz Kaling, Patrick Faubert, Gerrit Gort, Hans M Smid, Joop JA Van Loon, Marcel Dicke, Basem Kanawati, Philippe Schmitt-Kopplin, Andrea Polle, Jörg-Peter Schnitzler, Maaria Rosenkranz

Abstract

Chrysomela populi (poplar leaf beetle) is a common herbivore in poplar plantations whose infestation causes major economic losses. Because plant volatiles act as infochemicals, we tested whether isoprene, the main volatile organic compound (VOC) produced by poplars (Populus x canescens), affects the performance of C. populi employing isoprene emitting (IE) and transgenic isoprene non-emitting (NE) plants. Our hypothesis was that isoprene is sensed and affects beetle orientation or that the lack of isoprene affects plant VOC profiles and metabolome with consequences for C. populi feeding. Electroantennographic analysis revealed that C. populi can detect higher terpenes, but not isoprene. In accordance to the inability to detect isoprene, C. populi showed no clear preference for IE or NE poplar genotypes in the choice experiments, however, the beetles consumed a little bit less leaf mass and laid fewer eggs on NE poplar trees in field experiments. Slight differences in the profiles of volatile terpenoids between IE and NE genotypes were detected by gas chromatography - mass spectrometry. Non-targeted metabolomics analysis by Fourier Transform Ion Cyclotron Resonance Mass Spectrometer revealed genotype-, time- and herbivore feeding-dependent metabolic changes both in the infested and adjacent undamaged leaves under field conditions. We show for the first time that C. populi is unable to sense isoprene. The detected minor differences in insect feeding in choice experiments and field bioassays may be related to the revealed changes in leaf volatile emission and metabolite composition between the IE and NE poplars. Overall our results indicate that lacking isoprene emission is of minor importance for C. populi herbivory under natural conditions, and that the lack of isoprene is not expected to change the economic losses in poplar plantations caused by C. populi infestation.

Mendeley readers

The data shown below were compiled from readership statistics for 45 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 1 2%
Unknown 44 98%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 10 22%
Researcher 10 22%
Student > Master 5 11%
Professor 4 9%
Unspecified 2 4%
Other 7 16%
Unknown 7 16%
Readers by discipline Count As %
Agricultural and Biological Sciences 19 42%
Environmental Science 3 7%
Medicine and Dentistry 3 7%
Biochemistry, Genetics and Molecular Biology 2 4%
Unspecified 2 4%
Other 6 13%
Unknown 10 22%