NDLI: The intersection between cell wall disassembly, ripening, and fruit susceptibility to Botrytis cinerea

Content Provider	PubMed Central
Author	Cantu, D. Vicente, A. R. Greve, L. C. Dewey, F. M. Bennett, A. B. Labavitch, J. M. Powell, A. L. T.
Copyright Year	2008
Abstract	Fruit ripening is characterized by processes that modify texture and flavor but also by a dramatic increase in susceptibility to necrotrophic pathogens, such as Botrytis cinerea. Disassembly of the major structural polysaccharides of the cell wall (CW) is a significant process associated with ripening and contributes to fruit softening. In tomato, polygalacturonase (PG) and expansin (Exp) are among the CW proteins that cooperatively participate in ripening-associated CW disassembly. To determine whether endogenous CW disassembly influences the ripening-regulated increase in necrotropic pathogen susceptibility, B. cinerea susceptibility was assessed in transgenic fruit with suppressed polygalacturonase (LePG) and expansin (LeExp1) expression. Suppression of either LePG or LeExp1 alone did not reduce susceptibility but simultaneous suppression of both dramatically reduced the susceptibility of ripening fruit to B. cinerea, as measured by fungal biomass accumulation and by macerating lesion development. These results demonstrate that altering endogenous plant CW disassembly during ripening influences the course of infection by B. cinerea, perhaps by changing the structure or the accessibility of CW substrates to pathogen CW-degrading enzymes. Recognition of the role of ripening-associated CW metabolism in postharvest pathogen susceptibility may be useful in the design and development of strategies to limit pathogen losses during fruit storage, handling, and distribution.
Related Links	http://dx.doi.org/10.1073/pnas.0709813105
Ending Page	864
Page Count	6
Starting Page	859
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	3
Volume Number	105
Language	English
Publisher	National Academy of Sciences
Publisher Date	2008-01-22
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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Botrytis cinerea infection accelerates ripening and cell wall disassembly to promote disease in tomato fruit

Physical, Anatomical, and Biochemical Composition of Skins Cell Walls from Two Grapevine Cultivars (Vitis vinifera) of Champagne Region Related to Their Susceptibility to Botrytis cinerea during Ripening

Botrytis cinerea infection accelerates ripening and cell wall disassembly to promote disease in tomato fruit

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The intersection between cell wall disassembly, ripening, and fruit susceptibility to Botrytis cinerea

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