Physiological Response of Vernicia fordi and V. montana upon Inoculation with Fusarium oxysporum

YANG Su-su; GAO Ming; ZHU Hui-ping; LIU Ying-guan; WANG Yang-dong; CHEN Yi-cun

Tung wilt is a devastating disease for tung tree, which is regarded as the tung plague. Vernicia fordii and V. montana are two Chinese native tung species. V. fordii is susceptible to tung wilt disease while V. montana is resistant. To explore the difference of the two species responding to the pathogen, the research focused on the isolation and identification of the pathogen, and the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) and malondialdehyde (MDA) content of the two species after inoculation with the pathogen were measured. It turned out that the tung wilt pathogen was Fusarium oxysporum. The infection experiment revealed that the activities of SOD, POD and CAT in V. montana were higher than that of V. fordii after inoculation with F. oxysporum. in V. montana, the activities of SOD and POD increased at first and then decreased, the activity of CAT increased at first and maintained at a high level, the MDA content had no significant change. In V. fordii, both SOD activity and MDA content went up at the beginning and then down, the POD activity reduced at first and then increased, the CAT activity decreased at first and then rose and decreased at last. In conclusion, the resistant V. montana owned higher level activities of SOD, POD, CAT, and showed more increasing upon infection with the pathogen F. oxysporum than that of susceptible V. fordii.

1. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China

Received Date: 2014-04-25

Abstract: Tung wilt is a devastating disease for tung tree, which is regarded as the tung plague. Vernicia fordii and V. montana are two Chinese native tung species. V. fordii is susceptible to tung wilt disease while V. montana is resistant. To explore the difference of the two species responding to the pathogen, the research focused on the isolation and identification of the pathogen, and the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) and malondialdehyde (MDA) content of the two species after inoculation with the pathogen were measured. It turned out that the tung wilt pathogen was Fusarium oxysporum. The infection experiment revealed that the activities of SOD, POD and CAT in V. montana were higher than that of V. fordii after inoculation with F. oxysporum. in V. montana, the activities of SOD and POD increased at first and then decreased, the activity of CAT increased at first and maintained at a high level, the MDA content had no significant change. In V. fordii, both SOD activity and MDA content went up at the beginning and then down, the POD activity reduced at first and then increased, the CAT activity decreased at first and then rose and decreased at last. In conclusion, the resistant V. montana owned higher level activities of SOD, POD, CAT, and showed more increasing upon infection with the pathogen F. oxysporum than that of susceptible V. fordii.

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Reference (22)

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Physiological Response of Vernicia fordi and V. montana upon Inoculation with Fusarium oxysporum

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