4.2 Article

Volatile organic compounds (VOCs) from cereal plants infested with crown rot: their identity and their capacity for inducing production of VOCs in uninfested plants

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INTERNATIONAL JOURNAL OF PEST MANAGEMENT
卷 56, 期 4, 页码 377-383

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TAYLOR & FRANCIS LTD
DOI: 10.1080/09670874.2010.505668

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volatiles; cereals; Fusarium spp; crown-rot pathogens

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When infested with Fusarium sp., the cereals Triticum aestivum L. emend. Fiori et Paol. cv. 'Bombona', Avena sativa L. cv. 'Deresz', and Hordeum vulgare L. cv. 'Rastik' can emit volatile organic compounds (VOCs). The VOCs differ both qualitatively and quantitatively from those emitted by non-infested wheat, oat, and barley plants. We detected increased amounts of VOCs released by green leaves (green leaf volatiles - GLVs): (Z)-3-hexenal, (E)-2-hexenal, (Z)-3-hexen-1-ol, (E)-2-hexen-1-ol, (Z)-3-hexen-1-yl acetate, 1-hexyl acetate as well as the other VOCs like (Z)-ocimen, linalol, linaloloxide, benzyl acetate, indole, and -caryophyllene. The lipoxygenase pathway resulted in the highest release of GLVs in comparison to the other biochemical pathways of volatile production. As a result of Fusarium infestation, the amounts of VOCs varied between tested cereals. We also subjected uninfested wheat, barley, and oat plants to infested wheat plants, and found that these cereals released larger amounts of VOCs compared to control plants. Emitted amounts of VOCs were significantly higher the shorter the distance between uninfested and infested plants.

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