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J Agric Food Chem

Title:		Infection of corn ears by Fusarium spp. induces the emission of volatile sesquiterpenes
Author(s):		Becker EM; Herrfurth C; Irmisch S; Kollner TG; Feussner I; Karlovsky P; Splivallo R;
Address:		"Molecular Phytopathology and Mycotoxin Research, Georg-August-University , Grisebachstrasse 6, 37077 Goettingen, Germany"
Journal Title:		J Agric Food Chem
Year:		2014
Volume:		20140527
Issue:		22
Page Number:		5226 - 5236
DOI:		10.1021/jf500560f
ISSN/ISBN:		1520-5118 (Electronic) 0021-8561 (Linking)
Abstract:		"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. The aim of this study was to investigate whether volatile profiles could be used to identify Fusarium-infected corn ears. The volatiles released by corn ears infected by Fusarium graminearum, Fusarium verticillioides, and Fusarium subglutinans were studied. Volatile emission was recorded at 24 days postinoculation (dpi) and in a time series (from 4 to 24 dpi). Twenty-two volatiles were differentially emitted from Fusarium-infected versus healthy corn ears. These included C6-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 beta-macrocarpene and beta-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"
Keywords:		Fusarium/classification/*physiology Molecular Structure Plant Diseases/*microbiology Sesquiterpenes/*chemistry/metabolism Volatile Organic Compounds/*chemistry/metabolism Zea mays/*chemistry/metabolism/*microbiology;
Notes:		"MedlineBecker, Eva-Maria Herrfurth, Cornelia Irmisch, Sandra Kollner, Tobias G Feussner, Ivo Karlovsky, Petr Splivallo, Richard eng Research Support, Non-U.S. Gov't 2014/05/13 J Agric Food Chem. 2014 Jun 4; 62(22):5226-36. doi: 10.1021/jf500560f. Epub 2014 May 27"