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A spatial analysis of physiological changes associated with infection of cotyledons of marrow plants with cucumber mosaic virus

Tecsi, L.I., Smith, A.M., Maule, A.J. and Leegood, R.C. (1996) A spatial analysis of physiological changes associated with infection of cotyledons of marrow plants with cucumber mosaic virus. Plant Physiology, 111 (4). pp. 975-985. ISSN 0032-0889

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Abstract

Changes in host primary metabolism associated with the compatible interaction between cucumber mosaic virus and cotyledons of the marrow plant (Cucurbita pepo L.) have been localized, first by measuring activities of key enzymes in infected and uninfected regions of the cotyledon, and second by histochemical techniques applied to tissue prints of the infected region. A series of progressive metabolic changes occurs within the expanding infected lesion. Virus replication and the synthesis of viral protein at the periphery creates a strong sink demand associated with increased activities of anaplerotic enzymes, increased photosynthesis, and starch accumulation. Inside the lesion, when the synthesis of virus has declined, photosynthesis is reduced, starch is mobilized, and the emphasis of metabolism is shifted toward glycolysis and mitochondrial respiration. These changes are associated spatially with the onset of chlorosis. A decrease in total protein synthesis in this inner zone could be instrumental in some or all of these changes, leading to symptoms of viral infection.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 1996 by American Society of Plant Biologists
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > School of Biological Sciences (Sheffield) > Department of Animal and Plant Sciences (Sheffield)
The University of Sheffield > University of Sheffield Research Centres and Institutes > Robert Hill Institute (Sheffield)
Depositing User: Repository Officer
Date Deposited: 22 Oct 2004
Last Modified: 06 Jun 2014 21:56
Status: Published
Refereed: Yes
URI: http://eprints.whiterose.ac.uk/id/eprint/163

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