Journal
JOURNAL OF PLANT PHYSIOLOGY
Volume 168, Issue 17, Pages 2041-2047Publisher
ELSEVIER GMBH
DOI: 10.1016/j.jplph.2011.06.014
Keywords
M. ozyzae; Rice (Oryza sativa); Volatile organic compounds; Reactive oxygen species; Long-chain alkanols; 1-Octanol; 1-Decanol; Cell wall hydrolysate
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Funding
- Italian Ministry of University [PRIN-2006]
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Plants react to microbial attack with a number of defense mechanisms, including the synthesis of volatile organic compounds (VOCs) and the production of reactive oxygen species (ROS). These responses are triggered by elicitors derived from either the cell surface of pathogens or the incomplete hydrolysis of the plant cell wall. Here we show the response of rice (Otyza sativa L, cv Gigante Vercelli) cell cultures following treatment with cell wall hydrolysates prepared from the rice blast Magnaporthe oryzae. Elicitation prompted the production of several plant VOCs, which were analyzed by stir bar sorptive extraction from both the liquid and head-space phase (SBSE and HSSE, respectively) and gas chromatography coupled to mass spectrometry (GC-MS) analysis. VOCs included alkanes, alkenes and long-chain alcohols as well as cinnamyl alcohol, myristicin, a sesquiterpene alcohol (caryolan-1-ol), 1-butanamide and 2-pentylfuran. The major released compounds, 1-octanol and 1-decanol, were found to induce ROS production in both elicited and non-elicited rice cells and showed fungistatic activity against the pathogen M. oryzae. The possible role of induced VOCs and ROS production in the plant-pathogen interaction is discussed. (C) 2011 Elsevier GmbH. All rights reserved.
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