Sodium bicarbonate induces crystalline wax generation, activates host-resistance, and increases imazalil level in rind wounds of oranges, improving the control of green mold during storage
Abstract
Imazalil (IMZ) was quantified in the flavedo and albedo (Citrus fruits outer and inner tissue of the exocarp) of wounded and unwounded Valencia L. Olinda oranges following a 2 min immersion at 25 degrees C in 50, 100, or 250 microg mL(-1) of the fungicide mixture with or without 3% sodium bicarbonate (SBC). The addition of SBC significantly reduced the decay incidence throughout 30 d of storage at 10 degrees C with 95% RH and 6 d of simulated marketing period at 25 degrees C and 75% RH. In unwounded oranges, IMZ uptake was not changed by the coapplication of SBC, and the fungicide was predominantly recovered in the flavedo. To the contrary, in the albedo of wounded fruit, the residue level increased by about 6-fold when the fungicide was applied with SBC. When SBC was coapplied to wounded fruit, the phytoalexin scoparone was induced in the albedo and the accumulation was not affected by IMZ. When fruit was treated with SBC, scanning electron microscopy observations evidenced a production of crystalline wax patches with branched stripes and the magnitude was positively correlated to the salt concentration in the mixture. The generation as fast as 24 h post-treatment, and the different morphology of the new wax suggests a displacement of intracuticular waxes which can affect the fungicide sorption and diffusion coefficient into the rind.
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Postharvest treatments that have been combined with carbonates include a number of antagonistic biological control agents, curing, UV-C light, different disinfectants or oxidizers, and conventional fungicides such as imazalil (IMZ), pyrimethanil (PYR), or thiabendazole (TBZ) at low doses.
“Besides heating the solutions, postharvest treatments that have been combined with carbonates for this purpose include a number of antagonistic biological control agents, curing, UV-C light, different disinfectants or oxidizers, and conventional fungicides such as imazalil (IMZ), pyrimethanil (PYR), or thiabendazole (TBZ) at low doses (Palou et al., 2008; Dore et al., 2010; Venditti et al., 2010;”
From GRAS, plant- and animal-derived compounds as alternatives to conventional fungicides for the control of postharvest diseases of fresh horticultural produce (2016) · cites this paper as Dore et al., 2010
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- Authors
- Dore, A., Molinu, M. G., Venditti, T., & D’Hallewin, G.
- Affiliations
- Institute of Sciences of Food Production (IT)
- Consiglio Nazionale delle Ricerche, Istituto di Scienze delle Produzioni Alimentari, Traversa La Crucca, 3 Loc. Baldinca, 07040-Li Punti, Sassari, Italy
- Venue
- Journal of Agricultural and Food Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-05-20
- Volume
- 58
- Issue
- 12
- Pages
- 7297-7304
- ISSN
- 0021-8561 (ISSN-L)
- 1520-5118
- OpenAlex
- W2015450429
- Cited by
- 24
- References
- 44
- Citations by year
- 2026: 1 · 2025: 2 · 2024: 1 · 2023: 1 · 2021: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 4 · 2013: 4 · 2012: 2
- FWCI
- 3.08
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Agricultural and Food Chemistry (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Postharvest Quality and Shelf Life Management
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Surface Properties and Treatments
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Fungal Plant Pathogen Control
- Keywords
- sodium bicarbonate, imazalil, scoparone, host resistance, fungicide uptake, flavedo, albedo, postharvest storage, Valencia orange
- MeSH terms
- Food Preservation, Fruit, Fungicides, Industrial, Imidazoles, Penicillium, Waxes, Sodium Bicarbonate, Citrus sinensis
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