Document Detail


Infection of maize ears by Fusarium spp. induces the emission of volatile sesquiterpenes.
MedLine Citation:
PMID:  24816267     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Infection of corn (Zea mays L.) ears with fungal pathogens of the Fusarium genus might result in yield losses and in the accumulation of mycotoxins. Our aim was to investigate whether volatiles profiles could be used to identify Fusarium-infected corn ears. The volatiles released by corn ears infected by Fusarium graminearum, F. verticillioides, and F. subglutinans were studied. Volatile emission was recorded at 24 dpi (days post-inoculation) and in a time series (from 4 to 24 dpi). Twenty-two volatiles were differentially emitted from Fusarium-infected vs. healthy corn ears. These included C6 to C8 compounds and sesquiterpenoids. All volatiles indicative of Fusarium infection were detectable as early as 4-8 dpi and continued to be produced to the final sampling time (early milk maturity stage). The induced emission of β-macrocarpene and β-bisabolene correlated with an increased transcript accumulation of corn terpene synthase 6/11 (tps6/11). Additionally the modification of volatile profiles after Fusarium infection was accompanied by the induction of plant defense compounds such as zealexins and oxylipins. Together, these results reveal a broad metabolic response of the plant to pathogen attack. Volatile biomarkers of Fusarium infection are promising indicators for the early detection of fungal infection before disease symptoms become visible.
Authors:
Eva Maria Becker; Cornelia Herrfurth; Sandra Irmisch; Tobias Koellner; Ivo Feussner; Petr Karlovsky; Richard Splivallo
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-5-11
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2014 May 
Date Detail:
Created Date:  2014-5-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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