Antioxidant activity and lipid peroxidation in response to citrus canker bacterial infection
Journal Title: International Journal of Farming and Allied Sciences - Year 2013, Vol 2, Issue 24
Abstract
Asiatic citrus canker caused by Xannthomonas citr subsp. citri (Xcc) is endemic in many citrus-growing areas damaging citrus industry. It is expected that citrus plants respond to bacterial infection through generation of more reactive oxygen species, which is an indication of stress. In order to evaluate the stress level caused via Xcc, antioxidant activity, chlorophylls content and lipid peroxidation were measured in lime (Citrus aurantifollia) at 1, 4, and 7 days post inoculation. Two Xcc strains, namely LMG-9322 and NIGEB-88 (108 cfu/ml), were used to inoculate one-year old limes and the results were compared with mock inoculated plants with distilled water. Foliar and apoplastic catalase, apoplastic peroxidase and ascorbate peroxidase activities were increased, while foliar ascorbate peroxidase showed a decline in its activity. Treated plants responded indifferently to two bacterial strains. It seems that the different anti-oxidative capacity accompanied by the pathogen-induced response contributes to a better protection of citrus plant against bacterial pathogen stress.
Authors and Affiliations
Abdolrahman Rasoulnia, Seyed Mehdi Alavi, Hossein Askari, Naser Farrokhi and Masoud Soltani Najafabadi
Keywords
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