Pathogenic Fusarium oxysporum f. sp. cepae growing inside onion bulbs emits volatile organic compounds that correlate with the extent of infection

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dc.contributor.author Wang, Aimei
dc.contributor.author Islam, Md Nahidul
dc.contributor.author Johansen, Anders
dc.contributor.author Haapalainen, Minna
dc.contributor.author Latvala, Satu
dc.contributor.author Edelenbos, Merete
dc.date.accessioned 2021-02-25T22:55:19Z
dc.date.available 2021-12-17T22:45:25Z
dc.date.issued 2019-06
dc.identifier.citation Wang , A , Islam , M N , Johansen , A , Haapalainen , M , Latvala , S & Edelenbos , M 2019 , ' Pathogenic Fusarium oxysporum f. sp. cepae growing inside onion bulbs emits volatile organic compounds that correlate with the extent of infection ' , Postharvest Biology and Technology , vol. 152 , pp. 19-28 . https://doi.org/10.1016/j.postharvbio.2019.02.010
dc.identifier.other PURE: 123878234
dc.identifier.other PURE UUID: e63b0efc-f536-4c90-8931-4645359528fd
dc.identifier.other WOS: 000462593300003
dc.identifier.other Scopus: 85061913838
dc.identifier.other ORCID: /0000-0002-2497-4059/work/101918290
dc.identifier.uri http://hdl.handle.net/10138/327098
dc.description.abstract Diseases develop during the storage of onions. To minimize losses, new methods are needed to identify diseased bulbs early in storage. Volatile organic compounds (VOCs), the respiration rate, weight loss, and the dry matter content were investigated for 1-7 weeks post inoculation of bulbs with water (control) and two strains (Fox006 or Fox260) of Fusarium oxysporum f. sp. cepae. Photos, multispectral image analysis, and real-time polymerase chain reaction (PCR) showed no infection in the control onions, weak pathogenic infection in Fox006-onions, and strong pathogenic infection in Fox260-onions at week 7 post inoculation. Infected bulbs exhibited increased respiration rate, increased VOC emission rate, and increased weight loss. The control and Fox006-onions did not respond to inoculation and had similar reaction pattern. Forty-three different VOCs were measured, of which 17 compounds had sulfur in their chemical structure. 1-Propanethiol, methyl propyl sulfide, and styrene were emitted in high concentrations and were positively correlated with the extent of infection (r = 0.82 - 0.89). Therefore, these compounds were the most promising volatile markers of Fusarium basal rot infection. For the first time, we show that the extent of fungal infection determined by real-time PCR in onion bulbs is related with VOC emission. en
dc.format.extent 10
dc.language.iso eng
dc.relation.ispartof Postharvest Biology and Technology
dc.rights cc_by_nc_nd
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Allium cepa L.
dc.subject Food spoilage
dc.subject SPME
dc.subject Image analysis
dc.subject Real-time PCR
dc.subject Respiration rate
dc.subject DISCRIMINANT-ANALYSIS
dc.subject PROLIFERATUM
dc.subject QUALITY
dc.subject 1183 Plant biology, microbiology, virology
dc.subject 416 Food Science
dc.title Pathogenic Fusarium oxysporum f. sp. cepae growing inside onion bulbs emits volatile organic compounds that correlate with the extent of infection en
dc.type Article
dc.contributor.organization Department of Agricultural Sciences
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.postharvbio.2019.02.010
dc.relation.issn 0925-5214
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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