Inactivation of Xanthomonas citri subsp. citri and Effect on Infection of Citrus Canker by Gamma Irradiation

• Published in: Sigmulbyeong yeon'gu Vol. 20; no. 4; pp. 283 - 288
• Main Authors: Kim, Kyung Nam, Song, Min A, Han, Sang Heon, Song, Seong Joon, Jeun, Yong Chull
• Format: Journal Article
• Language: English
• Published: Hanrimwon Publishing Company 01.06.2015
• Subjects: Environment friendly; Ionization; Jeju Island; Radio activity
• ISSN: 1598-2262; 2233-9191
• DOI: 10.5423/RPD.2014.20.4.283

Citrus canker caused by Xanthomonas citri subsp. citri (Xcc) has been quarantined by many countries in the world. Recently, the usage of methyl bromide should be limited, application by gamma irradiation on the agricultural production is raised as an alternative method. In this study, the level of gamma irradiation which could decrease of population of Xcc in the suspension or on the surface of citrus fruit was investigated. The D10 value of Xcc, which is radiation dose required to reduce the number of the microorganism, was 55 and 28 Gy in the suspension and on the surface of citrus fruit, respectively. Furthermore, disease severity was suppressed on the citrus leaves inoculated with Xcc suspension pre-treated with gamma irradiation. Based on this study, it is suggested that Xcc on the citrus fruit could be eradicated by gamma irradiation and the results of this study may be valuable for application of gamma ray in quarantine activity