TY - JOUR
T1 - Changes in volatile compounds emitted by fungal pathogen spoilage of apples during decay
AU - Kim, Seong Mi
AU - Lee, Sang Mi
AU - Seo, Jeong Ah
AU - Kim, Young Suk
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/12
Y1 - 2018/12
N2 - Postharvest diseases in apples are mainly caused by pathogenic fungi. Fungal contamination and decay can change some of the emitted volatile organic compounds (VOCs). In this study, three major pathogens isolated from Fuji apples; Penicillium expansum, Botryosphaeria dothidea, and Alternaria alternata, were inoculated onto disease-free Fuji apples. The VOCs released were analyzed using gas chromatography-mass spectrometry combined with solid-phase microextraction to compare the changes in VOCs according to the decay index and pathogen species. After apples were inoculated with pathogens, ethanol, 3-methylbutan-1-ol, benzaldehyde, styrene, limonene and some ethyl esters constituted the main VOCs emitted during decay. The main volatile compounds according to pathogen species were (E)-hex-2-enal, 1-methoxy-3-methylbenzene, methyl heptanoate, diethyl carbonate, ethyl 2-phenylacetate, propyl octanoate, and ethyl decanoate produced in P. expansum, (E)-hex-3-enyl acetate, 1-methyl-4-propan-2-ylbenzene, 2-phenylethanol, α-terpinene, and α-terpinolene in B. dothidea, and phenylmethanol, 2-ethylhexan-1-ol, and acetophenone in A. alternata. The increase of fungal VOCs can be affected by tissue degradation and/or fungal metabolism of apples during decay.
AB - Postharvest diseases in apples are mainly caused by pathogenic fungi. Fungal contamination and decay can change some of the emitted volatile organic compounds (VOCs). In this study, three major pathogens isolated from Fuji apples; Penicillium expansum, Botryosphaeria dothidea, and Alternaria alternata, were inoculated onto disease-free Fuji apples. The VOCs released were analyzed using gas chromatography-mass spectrometry combined with solid-phase microextraction to compare the changes in VOCs according to the decay index and pathogen species. After apples were inoculated with pathogens, ethanol, 3-methylbutan-1-ol, benzaldehyde, styrene, limonene and some ethyl esters constituted the main VOCs emitted during decay. The main volatile compounds according to pathogen species were (E)-hex-2-enal, 1-methoxy-3-methylbenzene, methyl heptanoate, diethyl carbonate, ethyl 2-phenylacetate, propyl octanoate, and ethyl decanoate produced in P. expansum, (E)-hex-3-enyl acetate, 1-methyl-4-propan-2-ylbenzene, 2-phenylethanol, α-terpinene, and α-terpinolene in B. dothidea, and phenylmethanol, 2-ethylhexan-1-ol, and acetophenone in A. alternata. The increase of fungal VOCs can be affected by tissue degradation and/or fungal metabolism of apples during decay.
KW - Apple
KW - Fungal pathogen
KW - Postharvest disease
KW - Volatile organic compounds
UR - http://www.scopus.com/inward/record.url?scp=85052241374&partnerID=8YFLogxK
U2 - 10.1016/j.postharvbio.2018.08.003
DO - 10.1016/j.postharvbio.2018.08.003
M3 - Article
AN - SCOPUS:85052241374
SN - 0925-5214
VL - 146
SP - 51
EP - 59
JO - Postharvest Biology and Technology
JF - Postharvest Biology and Technology
ER -