Different headspace profiles in wild crucifer species in response to Plutella xylostella herbivory and exogenous jasmonic acid application

Although exogenous treatment of plants withjasmonic acid （JA） may result in induced responses similar to plant defences induced by herbivory, few studies have compared the details of insect herbivory and JA-mimicked responses. We compared volatiles of two crucifer species, Cardamine impatiens and Le...

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Bibliographic Details
Published in:Insect science 2010-02, Vol.17 (1), p.29-37
Main Authors: Zhang, Peng-Jun, Shu, Jin-Ping, Dicke, Marcel, Liu, Shu-Sheng
Format: Article
Language:English
Subjects:
arabidopsis-thaliana
Brassicaceae
Cardamine
elicitor
emissions
herbivores
herbivory
identification
Impatiens
indirect defenses
induced response
involvement
jasmonic acid
Lepidium virginicum
methyl jasmonate
nicotiana-attenuata
parasitic wasps
plant volatiles
Plutella xylostella
volatile emission
十字花科蔬菜
小菜蛾幼虫
植物挥发物
茉莉酸
诱导反应
野生物种
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Summary:Although exogenous treatment of plants withjasmonic acid （JA） may result in induced responses similar to plant defences induced by herbivory, few studies have compared the details of insect herbivory and JA-mimicked responses. We compared volatiles of two crucifer species, Cardamine impatiens and Lepidium virginicum, in response to Plutella xylostella larval feeding and exogenous application of JA, over the entire period of time when induced changes were detectable. Significant differences in the composition and timing of volatiles occurred between herbivory and JA treatments in both plants. The quantity ofnitrile and isothiocyanate released in response to herbivory was significantly larger than that upon JA treatment. In each of the two plant species, most volatile components were emitted immediately upon larval feeding and their quantity dropped rapidly once feeding ceased. In contrast, the emission of volatiles in response to JA treatment lasted for a longer period of time, and the maximum emission rate was recorded 2 and 3 days after JA treatment in L. virginicum and C. impatiens respectively. These findings are discussed in the context of signal-transduction pathways and mechanisms involved in induced emissions of plant volatiles, as well as induced defences mediated by plant volatiles.
ISSN:1672-9609
1744-7917
DOI:10.1111/j.1744-7917.2009.01283.x