Integration of two herbivore-induced plant volatiles results in synergistic effects on plant defence and resistance

Hu, Lingfei; Ye, Meng; Erb, Matthias (2019). Integration of two herbivore-induced plant volatiles results in synergistic effects on plant defence and resistance. Plant, Cell & Environment, 42(3), pp. 959-971. Blackwell Science 10.1111/pce.13443

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Plants can use induced volatiles to detect herbivore‐ and pathogen‐attacked neighbors and prime their defenses. Several individual volatile priming cues have been identified, but whether plants are able to integrate multiple cues from stress‐related volatile blends remains poorly understood. Here, we investigated how maize plants respond to two herbivore‐induced volatile priming cues with complementary information content, the green leaf volatile (Z)‐3‐hexenyl acetate (HAC) and the aromatic volatile indole. In the absence of herbivory, HAC directly induced defence gene expression, whereas indole had no effect. Upon induction by simulated herbivory, both volatiles increased jasmonate signalling, defence gene expression, and defensive secondary metabolite production and increased plant resistance. Plant resistance to caterpillars was more strongly induced in dual volatile‐exposed plants than plants exposed to single volatiles.. Induced defence levels in dual volatile‐exposed plants were significantly higher than predicted from the added effects of the individual volatiles, with the exception of induced plant volatile production, which showed no increase upon dual‐exposure relative to single exposure. Thus, plants can integrate different volatile cues into strong and specific responses that promote herbivore defence induction and resistance. Integrating multiple volatiles may be beneficial, as volatile blends are more reliable indicators of future stress than single cues.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Biotic Interactions
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Hu, Lingfei; Ye, Meng and Erb, Matthias

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0140-7791

Publisher:

Blackwell Science

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

30 Oct 2018 16:24

Last Modified:

28 Feb 2019 07:57

Publisher DOI:

10.1111/pce.13443

Uncontrolled Keywords:

(Z)‐3‐hexenyl acetate, benzoxazinoids, indole, induced resistance, insects, jasmonic acid, maize,plant defence, plant herbivore interactions, volatile communication

BORIS DOI:

10.7892/boris.120789

URI:

https://boris.unibe.ch/id/eprint/120789

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