The diurnal emission pattern of constitutive and induced rice volatiles

Sobhy, Islam ORCID: https://orcid.org/0000-0003-4984-1823, Miyake, Atsushi and Galis, Ivan 2015. The diurnal emission pattern of constitutive and induced rice volatiles. Presented at: ISCE 2015: 31st Conference of the International Society of Chemical Ecology, 29 June - 3 July 2015.

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Abstract

Plants have evolved highly effective defense mechanisms to resist attacks by herbivores. Insect resistance traits include 'indirect defense' which is the ability to respond to herbivore attack by synthesizing a complex bouquet of herbivore-induced volatile organic compounds (HI-VOCs) that attract natural enemies of herbivores. Using the trophic model of rice plant and the generalist Loreyi armyworm, Mythimna loreyi Duponchel (MYL), we characterized the inducibility of rice HI-VOCs upon MYL mimicked herbivory. Our results show that simulated MYL feeding significantly increases the emission of a number of key HI-VOCs, including linalool and MeSA. Given that many abiotic factors affect VOCs emissions, such as the photoperiod (Gouinguené and Turlings 2002), the diurnal emission patterns of HI-VOCs were determined in control rice plants and those subjected to MYL simulated feeding on a previous day. Our findings stress that both control and induced rice plants followed a diurnal pattern in VOCs emission; however, induced plants emitted remarkably higher amounts of HI-VOCs, 2-10 folds in some compounds, compared with control plants. It suggests that such enhanced HI-VOCs blend and its composition fully depends on the photoperiod of the environment when the natural enemies are actively foraging during the day.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Completion
Status:	Unpublished
Schools:	Biosciences
Related URLs:	http://chemecol.org/programs/2015%20abst...
Last Modified:	10 Nov 2022 10:38
URI:	https://orca.cardiff.ac.uk/id/eprint/147647

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