Artículo
The intersection between cell wall disassembly, ripening, and fruit susceptibility to Botrytis cinerea
Cantu, D.; Vicente, Ariel Roberto
; Greve, L. C.; Dewey, F. M.; Bennett, A. B.; Labavitch, J. M.; Powell, A. L. T.
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
01/2008
Editorial:
National Academy of Sciences
Revista:
Proceedings of the National Academy of Sciences of The United States of America
ISSN:
0027-8424
e-ISSN:
1091-6490
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
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. © 2008 by The National Academy of Sciences of the USA.
Palabras clave:
EXPANSIN
,
PLANT PATHOGEN
,
POLYGALACTURONASE
,
TOMATO
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Identificadores
Colecciones
Articulos(CIDCA)
Articulos de CENTRO DE INV EN CRIOTECNOLOGIA DE ALIMENTOS (I)
Articulos de CENTRO DE INV EN CRIOTECNOLOGIA DE ALIMENTOS (I)
Citación
Cantu, D.; Vicente, Ariel Roberto; Greve, L. C.; Dewey, F. M.; Bennett, A. B.; et al.; The intersection between cell wall disassembly, ripening, and fruit susceptibility to Botrytis cinerea; National Academy of Sciences; Proceedings of the National Academy of Sciences of The United States of America; 105; 3; 1-2008; 859-864
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