Effect of the combined treatment with gamma irradiation and sodium dichloroisocyanurate on postharvest Rhizopus soft rot of sweet potato

Jeong, Je-Yong; Yoon, Minchul; Lee, Kwang-Youll; Jung, Kwangyun; Kim, Hwa Jung; Park, Hae-Jun; Jeong, Rae‐Dong

doi:10.1007/bf03356519

Cited by 9 publications

(3 citation statements)

References 21 publications

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“…Also, in this study it was demonstrated that Xcc was very sensitive to X-irradiation, as it is to γ-irradiation ( Table 1 ). Additionally in case of mold strains, the lethal doses for Rhizopus stolonifer , Botrytis cinerea , Botrytis elliptica , and Aspergillus flavus were 2.8 kGy, 4 kGy, 2 kGy, and 10 kGy, respectively ( Aquino et al, 2005 ; Jeong et al, 2014 ; Kim and Yun, 2014 ; Yoon et al, 2014 ), which were higher compared with that for Xcc . This high sensitivity of Xcc to ionizing radiation may be useful for its application in agricultural production in which elimination of Xcc is required for export to the Xcc- free countries.…”

Section: Resultsmentioning

confidence: 91%

Effect of X-irradiation on Citrus Canker Pathogen Xanthomonas citri subsp. citri of Satsuma Mandarin Fruits

Song

Park

Kim

et al. 2015

The Plant Pathology Journal

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Citrus canker caused by Xanthomonas citri subsp. citri (Xcc) is one of the most important bacterial diseases of citrus. Because citrus canker is not found in many countries including European Union and Australia, Xcc is strictly regulated in order to prevent its spread. In this study, the effects of X-irradiation on Xcc growth either in the suspension or on the surface of citrus fruits were investigated. The suspension containing 1×107 cfu/ml of Xcc was irradiated with different absorbed doses of X-irradiation ranging from 50 to 400 Gy. The results showed that Xcc was fully dead at 400 Gy of X-irradiation. To determine the effect of X-irradiation on quarantine, the Xcc-inoculated citrus fruits were irradiated with different X-ray doses at which Xcc was completely inhibited by an irradiation dose of 250 Gy. The D10 value for Xcc on citrus fruits was found to be 97 Gy, indicating the possibility of direct application on citrus quarantine without any side sterilizer. Beside, presence of Xcc on the surface of asymptomatic citrus fruits obtained from citrus canker-infected orchards was noted. It indicated that the exporting citrus fruits need any treatment so that Xcc on the citrus fruits should be completely eliminated. Based on these results, ionizing radiation can be considered as an alternative method of eradicating Xcc for export of citrus fruits.

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Section: Resultsmentioning

confidence: 91%

Effect of X-irradiation on Citrus Canker Pathogen Xanthomonas citri subsp. citri of Satsuma Mandarin Fruits

Song

Park

Kim

et al. 2015

The Plant Pathology Journal

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“…Pear fruit firmness was determined as described by Jeong et al. (). Briefly, firmness was measured at five locations per fruit using a textural measurement instrument (TA‐XT2i; Stable Micro System, Surrey, UK) equipped with a 5 kg mechanical load.…”

Section: Methodsmentioning

confidence: 99%

Gamma irradiation‐induced disease resistance of pear (Pyrus pyrifolia “Niitaka”) against Penicillium expansum

Jeong

Park

2017

Journal of Phytopathology

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In this study, the effects of gamma irradiation on the resistance of pear fruit against Penicillium expansum, the causal agent of blue mould disease, were investigated. A low dose of gamma irradiation for 14 days increased the disease resistance and firmness of pear fruits. Remarkably, exposure to 200 Gy of gamma irradiation significantly maintained fruit firmness, markedly reduced disease incidence and enhanced the activity of defence‐related enzymes (e.g., β‐1,3‐glucanase, phenylalanine ammonia lyase, peroxidase and polyphenol oxidase) and expression of pathogenesis‐related (PR) genes (e.g., PR‐1, PR‐3 and PR‐4). Therefore, the gamma irradiation‐induced resistance against P. expansum involves both metabolic changes and the induction of expression of defence‐related genes. In addition, scanning electron microscopic analysis revealed that gamma irradiation significantly inhibits the growth of P. expansum. These results suggest that exposure of mature harvested pear fruits to artificial gamma irradiation confers fungal disease resistance; therefore, gamma irradiation represents an important strategy for controlling postharvest diseases in pear fruit.

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“…The unit of irradiation dose is the gray (Gy), which is the energy absorbed in J/kg of material. It has been reported that GI successfully inhibits the growth of pathogens on fruits or vegetables, such as Botrytis cinerea in sweet pepper, Penicillium purpurogenum in pineapple, Rhizopus stolonifer in sweet potato, and Monilinia fructicola in peach (Damayanti et al 1992;Kim & Yook 2009;Jeong et al 2014;Yoon et al 2014). Despite many studies on the control of postharvest fungal pathogens by irradiation, the technique has not been carried out much for the control of bacterial pathogens and its potential modes of action.…”

mentioning

confidence: 99%

Effect of gamma irradiation on Pseudomonas syringae pv. tomato DC3000 - short communication

Jeong¹,

Chu²,

Lee³

et al. 2016

Plant Prot. Sci.

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Jeong R.D., Chu E.H., Lee G.W., Park J.M., Park H.J. (2016): Effect of gamma irradiation on Pseudomonas syringae pv. tomato DC3000 -short communication. Plant Protect. Sci., 52: 107-112.Gamma irradiation (GI) was evaluated for its in vitro and in vivo antibacterial activity against bacterial specks of tomato, Pseudomonas syringae pv. tomato (Pst). GI showed complete inactivation of Pst DC3000, especially at a dose of 200 Gy in vitro. Gamma-irradiated bacterial cells were found to (1) have spilled cytoplasmic contents, (2) display a damage on the surface of the cells, (3) have reduced membrane integrity, and (4) have fragmented genomic DNA, all in a dosedependent manner. Consistent with the in vitro assay, a low dose of 150 Gy showed sufficient antibacterial activity on tomato seedlings. The present study suggested that the GI of bacterial cells results in substantial damage of the cell membrane, and that, along with DNA fragmentation, results in dose-dependent cell inactivation. These findings suggest that GI has potential as an antibacterial approach to reduce the severity of the bacterial speck disease of tomato.

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Effect of the combined treatment with gamma irradiation and sodium dichloroisocyanurate on postharvest Rhizopus soft rot of sweet potato

Cited by 9 publications

References 21 publications

Effect of X-irradiation on Citrus Canker Pathogen Xanthomonas citri subsp. citri of Satsuma Mandarin Fruits

Effect of X-irradiation on Citrus Canker Pathogen Xanthomonas citri subsp. citri of Satsuma Mandarin Fruits

Gamma irradiation‐induced disease resistance of pear (Pyrus pyrifolia “Niitaka”) against Penicillium expansum

Effect of gamma irradiation on Pseudomonas syringae pv. tomato DC3000 - short communication

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