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The Intersection between Cell Wall Disassembly, Ripening, and Fruit Susceptibility to Botrytis cinerea

Cantu, D. ; Vicente, A. R. ; Greve, L. C. ; Dewey, F. M. ; Bennett, A. B. ; Labavitch, J. M. ; Powell, A. L. T.

Proceedings of the National Academy of Sciences - PNAS, 2008-01, Vol.105 (3), p.859-864 [Periódico revisado por pares]

United States: National Academy of Sciences

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Título:
The Intersection between Cell Wall Disassembly, Ripening, and Fruit Susceptibility to Botrytis cinerea
Autor: Cantu, D. ; Vicente, A. R. ; Greve, L. C. ; Dewey, F. M. ; Bennett, A. B. ; Labavitch, J. M. ; Powell, A. L. T.
Assuntos: Bacteria ; Biological Sciences ; Botrytis - pathogenicity ; Botrytis cinerea ; Carbohydrates ; Cell Wall - metabolism ; Cells ; Cellular biology ; Fruit - growth & development ; Fruits ; Fungal biomass ; Genotypes ; Lycopersicon esculentum ; Pathogens ; Plant cells ; Plant Diseases ; Plant pathology ; Plant Proteins - metabolism ; Plants ; Plants, Genetically Modified ; Polygalacturonase - metabolism ; Polymers ; Polysaccharides - metabolism ; Ripening ; Ripening stage ; Solanum lycopersicum - growth & development ; Solanum lycopersicum - metabolism ; Tomatoes ; Transgenic plants
É parte de: Proceedings of the National Academy of Sciences - PNAS, 2008-01, Vol.105 (3), p.859-864
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Author contributions: D.C. and A.R.V. contributed equally to this work; D.C., A.R.V., F.M.D., A.B.B., J.M.L., and A.L.T.P. designed research; D.C., A.R.V., L.C.G., and A.L.T.P. performed research; D.C., A.R.V., L.C.G., and F.M.D. contributed new reagents/analytic tools; D.C., A.R.V., L.C.G., F.M.D., A.B.B., J.M.L., and A.L.T.P. analyzed data; and D.C., A.R.V., A.B.B., J.M.L., and A.L.T.P. wrote the paper.
Edited by Harry Klee, University of Florida, Gainesville, FL, and accepted by the Editorial Board November 30, 2007
Descrição: 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.
Editor: United States: National Academy of Sciences
Idioma: Inglês

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The Intersection between Cell Wall Disassembly, Ripening, and Fruit Susceptibility to Botrytis cinerea

Cantu, D. ; Vicente, A. R. ; Greve, L. C. ; Dewey, F. M. ; Bennett, A. B. ; Labavitch, J. M. ; Powell, A. L. T.

United States: National Academy of Sciences

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