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2004•Acta Phytopathologica SinicaRequires access

The dynamic effects of Colletotrichum capsici f. nicotianae toxin on MDA content and some protective enzymes in tobacco

Ping Liu

Open publisher page 2 citations

Abstract

The dynamic changes of malondialdehyde (MDA) content and superoxide dismutase (SOD), peroxidase (POD) and polyphenol oxidase (PPO) activities induced by Colletotrichum capsici f. nico-tianae toxin on tobacco were studied. The activities of SOD,POD and PPO in both resistant cultivar (Bur-ley21) and susceptible cultivar(NC82)increased in the early stage after treatment,and decreased in the late period. However,the resistant cultivar Burley21 showed a higher level of SOD, POD and PPO activities and a lower changing rate of MDA content than those in the susceptible cultivar NC82. Moreover, the activities of three tested enzymes in Burley21 also declined more slowly in the late time after inoculation. It demonstrated that Burley21 possessed stronger protective potential and was more resistant to membrane lipid peroxidation.

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What this paper is about

The dynamic changes of malondialdehyde (MDA) content and superoxide dismutase (SOD), peroxidase (POD) and polyphenol oxidase (PPO) activities induced by Colletotrichum capsici f. nico-tianae toxin on tobacco were studied. The activities of SOD,POD and PPO in both resistant cultivar (Bur-ley21) and susceptible cultivar(NC82)increased in the early stage after treatment,and decreased in the late period. However,the resistant cultivar Burley21 showed a higher level of SOD, POD and PPO activities and a lower changing rate of MDA content than those in the susceptible cultivar NC82. Moreover, the activities of three tested enzymes in Burley21 also declined more slowly in the late time after inoculation. It demonstrated that Burley21 possessed stronger protective potential and was more resistant to membrane lipid peroxidation.

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Available abstract

The dynamic changes of malondialdehyde (MDA) content and superoxide dismutase (SOD), peroxidase (POD) and polyphenol oxidase (PPO) activities induced by Colletotrichum capsici f. nico-tianae toxin on tobacco were studied. The activities of SOD,POD and PPO in both resistant cultivar (Bur-ley21) and susceptible cultivar(NC82)increased in the early stage after treatment,and decreased in the late period. However,the resistant cultivar Burley21 showed a higher level of SOD, POD and PPO activities and a lower changing rate of MDA content than those in the susceptible cultivar NC82. Moreover, the activities of three tested enzymes in Burley21 also declined more slowly in the late time after inoculation. It demonstrated that Burley21 possessed stronger protective potential and was more resistant to membrane lipid peroxidation.

Key concepts: Polyphenol oxidase, Malondialdehyde, Superoxide dismutase, Peroxidase, Point of delivery, Cultivar, Lipid peroxidation, Catechol oxidase

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