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Carvacrol and eugenol effectively inhibit Rhizopus stolonifer and control postharvest soft rot decay in peaches.
- Source :
-
Journal of applied microbiology [J Appl Microbiol] 2018 Jan; Vol. 124 (1), pp. 166-178. Date of Electronic Publication: 2017 Dec 18. - Publication Year :
- 2018
-
Abstract
- Aims: This study aimed to investigate the antifungal mechanism of carvacrol and eugenol to inhibit Rhizopus stolonifer and the control of postharvest soft rot decay in peaches.<br />Methods and Results: To investigate the antifungal mechanism, the effects of carvacrol and eugenol on the mycelium growth, leakages of cytoplasmic contents, mycelium morphology, cell membrane and membrane composition of R. stolonifer were studied. Carvacrol and eugenol both exhibited dose-dependent antifungal activity against R. stolonifer, carvacrol at a concentration of 2 μl per plant and eugenol at a concentration of 4 μl per plant inhibited fungal growth completely. The two essential oils (EOs) increased cell membrane penetrability and caused the leakage of cytoplasm, nucleic acid and protein content. The observation using scanning electron microscopy and fluorescent microscopy showed modification of the hyphal morphology and breakage of the cell plasma membrane. Decreased ergosterol contents confirmed that the two EOs could destroy the membrane of R. stolonifer. For the in vivo test, the inhibition of soft rot disease and the induction of defence-related enzymes were investigated. Carvacrol and eugenol significantly reduced the incidence and severity of soft rot decay in inoculated peaches. The best treatments for controlling soft rot decay were obtained at 0·5 μl l <superscript>-1</superscript> for carvacrol and 1 μl l <superscript>-1</superscript> for eugenol. The activities of defence-related enzymes in peaches were also enhanced by fumigation with two EOs.<br />Conclusion: This study showed that carvacrol and eugenol could effectively inhibit the growth of R. stolonifer in vitro and successfully control the incidence of soft rot decay in honey peaches.<br />Significance and Impact of the Study: The above findings may be the main antifungal mechanism of carvacrol and eugenol on R. stolonifer. Furthermore, carvacrol and eugenol are helpful for their commercial application on the preservation of fresh fruit.<br /> (© 2017 The Society for Applied Microbiology.)
- Subjects :
- Cymenes
Fruit growth & development
Fruit microbiology
Hyphae drug effects
Hyphae growth & development
Mycelium drug effects
Mycelium growth & development
Oils, Volatile pharmacology
Prunus persica growth & development
Rhizopus growth & development
Eugenol pharmacology
Fungicides, Industrial pharmacology
Monoterpenes pharmacology
Plant Diseases microbiology
Prunus persica microbiology
Rhizopus drug effects
Subjects
Details
- Language :
- English
- ISSN :
- 1365-2672
- Volume :
- 124
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Journal of applied microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 29044849
- Full Text :
- https://doi.org/10.1111/jam.13612