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

Authors
Song, Min-APark, Jae SinKim, Ki DeokJeun, Yong Chull
Issue Date
12월-2015
Publisher
KOREAN SOC PLANT PATHOLOGY
Keywords
citrus disease; environment friendly; exportation; radioactivity; sterilization
Citation
PLANT PATHOLOGY JOURNAL, v.31, no.4, pp.343 - 349
Indexed
SCIE
SCOPUS
KCI
Journal Title
PLANT PATHOLOGY JOURNAL
Volume
31
Number
4
Start Page
343
End Page
349
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/91794
DOI
10.5423/PPJ.OA.06.2015.0106
ISSN
1598-2254
Abstract
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 x 10(7) 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 D-10 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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