Abstract:
The interface between plants and pathogens plays an important role in their interaction. Studies of fungal cell walls are scarce and previous results show the existence of α-1,3-glucans in addition to ß-glucans. In addition, α-1,3-glucans are not present in plant cell walls, and α-glucanase activity in plants has not been described before. In a previous work, we purified and characterized an α-1,3-glucan from a binucleated, non-pathogenic Rhizoctonia isolate, which induces plant defence responses. Therefore, in order to study the architecture of the fungal cell wall, and the accessibility and localization of the α-glucan elicitor, we prepared an antibody against the α-1,3-glucan and analysed its localization by TEM. Immunolocalization showed the presence of the α-1,3-glucan in the intercellular spaces and along the cell walls, mainly on the inner layers. This result, and the presence of the α-1,3-glucan in the liquid culture medium in which binucleated non-pathogenic Rhizoctonia was grown, confirmed that the α-glucan had been secreted. The α-1,3-glucan was also immunocytolocalized on potato sprouts tissue elicited with the glucan; gold particles were observed in vacuoles and close to the plasmalemma. In addition, α-glucanase activity in potato sprouts was detected using cell wall glucans from the pathogenic isolate R. solani AG-3 as substrates; whereas, when cell wall glucans from non-pathogenic isolates were used, no α-glucanase activity was detected. Our results suggest that the presence of α-1,3-glucans could be associated with the formation and integrity of the cell wall and also with plant-fungi interactions. This is the first report to describe α-glucanolytic activity in plants. © 2007 The British Mycological Society.
Registro:
Documento: |
Artículo
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Título: | Cell wall α-1,3-glucans from a biocontrol isolate of Rhizoctonia: immunocytolocalization and relationship with α-glucanase activity from potato sprouts |
Autor: | Wolski, E.; Maldonado, S.; Daleo, G.; Andreu, A. |
Filiación: | Instituto de Investigaciones Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3250 4to nivel, P.O. Box, 1245 Mar del Plata, Argentina Laboratorio de Anatomía y Embriología Vegetal, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, P.O. Box, 1428 Buenos Aires, Argentina
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Palabras clave: | Immunoelectron microscopy; Non-pathogenic binucleate; Plant-fungus interactions; Solanum tuberosum; Ultrastructure; 1,3 alpha glucan; alpha-1,3-glucan; glucan; glycosidase; unclassified drug; biological control; cytology; enzyme activity; fungus; plant defense; potato; secretion; article; biological pest control; cell wall; chemistry; enzymology; growth, development and aging; Hyphomycetes; immunoelectron microscopy; isolation and purification; metabolism; potato; transmission electron microscopy; ultrastructure; Cell Wall; Glucans; Glycoside Hydrolases; Microscopy, Electron, Transmission; Microscopy, Immunoelectron; Pest Control, Biological; Rhizoctonia; Solanum tuberosum; Fungi; Hyphomycetes; Rhizoctonia; Solanum tuberosum |
Año: | 2007
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Volumen: | 111
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Número: | 8
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Página de inicio: | 976
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Página de fin: | 984
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DOI: |
http://dx.doi.org/10.1016/j.mycres.2007.06.012 |
Título revista: | Mycological Research
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Título revista abreviado: | Mycol. Res.
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ISSN: | 09537562
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CODEN: | MYCRE
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CAS: | glucan, 9012-72-0, 9037-91-6; glycosidase, 9032-92-2; Glucans; Glycoside Hydrolases, 3.2.1.-; alpha-1,3-glucan, 9051-95-0
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09537562_v111_n8_p976_Wolski |
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Citas:
---------- APA ----------
Wolski, E., Maldonado, S., Daleo, G. & Andreu, A.
(2007)
. Cell wall α-1,3-glucans from a biocontrol isolate of Rhizoctonia: immunocytolocalization and relationship with α-glucanase activity from potato sprouts. Mycological Research, 111(8), 976-984.
http://dx.doi.org/10.1016/j.mycres.2007.06.012---------- CHICAGO ----------
Wolski, E., Maldonado, S., Daleo, G., Andreu, A.
"Cell wall α-1,3-glucans from a biocontrol isolate of Rhizoctonia: immunocytolocalization and relationship with α-glucanase activity from potato sprouts"
. Mycological Research 111, no. 8
(2007) : 976-984.
http://dx.doi.org/10.1016/j.mycres.2007.06.012---------- MLA ----------
Wolski, E., Maldonado, S., Daleo, G., Andreu, A.
"Cell wall α-1,3-glucans from a biocontrol isolate of Rhizoctonia: immunocytolocalization and relationship with α-glucanase activity from potato sprouts"
. Mycological Research, vol. 111, no. 8, 2007, pp. 976-984.
http://dx.doi.org/10.1016/j.mycres.2007.06.012---------- VANCOUVER ----------
Wolski, E., Maldonado, S., Daleo, G., Andreu, A. Cell wall α-1,3-glucans from a biocontrol isolate of Rhizoctonia: immunocytolocalization and relationship with α-glucanase activity from potato sprouts. Mycol. Res. 2007;111(8):976-984.
http://dx.doi.org/10.1016/j.mycres.2007.06.012