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Isoprene emissions influence herbivore feeding decisions

Laothawornkitkul, Jullada and Paul, Nigel D. and Vickers, Claudia E. and Possell, Malcolm and Taylor, Jane E. and Mullineaux, Philip M. and Hewitt, C. N. (2008) Isoprene emissions influence herbivore feeding decisions. Plant, Cell and Environment, 31 (10). pp. 1410-1415. ISSN 0140-7791

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Abstract

Isoprene (C5H8, 2-methyl 1,3-butadiene) is synthesized and emitted by many, but not all, plants. Unlike other related volatile organic compounds (monoterpenes and sesquiterpenes), isoprene has not been shown to mediate plant-herbivore interactions. Here, for the first time, we show, in feeding choice tests using isoprene-emitting transgenic tobacco plants (Nicotiana tabacum cv. Samsun) and non-emitting azygous control plants, that isoprene deters Manduca sexta caterpillars from feeding. This avoidance behaviour was confirmed using an artificial (isoprene-emitting and non-emitting control) diet. Both in vivo and in vitro experiments showed that isoprene can activate feeding avoidance behaviour in this system with a dose-response effect on caterpillar behaviour and an isoprene emission threshold level of < 6 nmol m(-2) s(-1).

Item Type: Article
Journal or Publication Title: Plant, Cell and Environment
Uncontrolled Keywords: avoidance ; dose response ; herbivory ; threshold ; tobacco hornworm ; transgenic tobacco ; VOLATILE ORGANIC-COMPOUNDS ; PLANT VOLATILES ; COMPOUND EMISSIONS ; BIOSYNTHESIS ; PRODUCTS ; DEFENSE ; LEAVES ; TEMPERATURE ; PERFORMANCE ; SYNTHASE
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: UNSPECIFIED
ID Code: 26584
Deposited By: Prof CN Hewitt
Deposited On: 05 Jun 2009 15:03
Refereed?: Yes
Published?: Published
Last Modified: 23 Jul 2014 14:48
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/26584

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