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Effects of cucumber mosaic virus infection on electron transport and antioxidant system in chloroplasts and mitochondria of cucumber and tomato leaves.
Song, Xing-Shun; Wang, Yan-Jie; Mao, Wei-Hua; Shi, Kai; Zhou, Yan-Hong; Nogués, Salvador; Yu, Jing-Quan.
Afiliación
  • Song XS; Department of Horticulture, Zhejiang University, Hangzhou, China.
Physiol Plant ; 135(3): 246-57, 2009 Mar.
Article en En | MEDLINE | ID: mdl-19140890
ABSTRACT
We examined the responses of the photosynthetic and respiratory electron transport and antioxidant systems in cell organelles of cucumber (Cucumis sativus L.) and tomato (Lycopersicon esculentum Mill.) leaves to infection of cucumber mosaic virus (CMV) by comparing the gas exchange, Chl fluorescence, respiratory electron transport, superoxide dismutase (SOD, EC 1.15.1.1) and ascorbate-glutathione (AsA-GSH) cycle enzymes and the production of H(2)O(2) in chloroplasts, mitochondria and soluble fraction in virus-infected and non-infected leaves. Long-term CMV infection resulted in decreased photosynthesis and respiration rates. Photosynthetic electron flux to carbon reduction, respiratory electron transport via both complex I and complex II and also the Cyt respiration rate all significantly decreased, while photosynthetic alternative electron flux and alternative respiration significantly increased. These changes in electron transport were accompanied by a general increase in the activities of SOD/AsA-GSH cycle enzymes followed by an increased H(2)O(2) accumulation in chloroplasts and mitochondria. These results demonstrated that disturbance of photosynthetic and respiratory electron transport by CMV also affected the antioxidative systems, thereby leading to oxidative stress in various organelles.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fotosíntesis / Cloroplastos / Cucumovirus / Solanum lycopersicum / Cucumis sativus / Mitocondrias / Antioxidantes Idioma: En Revista: Physiol Plant Año: 2009 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fotosíntesis / Cloroplastos / Cucumovirus / Solanum lycopersicum / Cucumis sativus / Mitocondrias / Antioxidantes Idioma: En Revista: Physiol Plant Año: 2009 Tipo del documento: Article País de afiliación: China