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Article: The role of mucilage in the attachment of conidia, germ tubes and appressoria in the saprobic aquatic hyphomycetes Lemonniera aquatica and Mycocentrospora filiformis

TitleThe role of mucilage in the attachment of conidia, germ tubes and appressoria in the saprobic aquatic hyphomycetes Lemonniera aquatica and Mycocentrospora filiformis
Authors
KeywordsAquatic hyphomycetes
Appressorium
Ultrastructure
Mucilage
Germination
Issue Date1996
PublisherN R C Research Press. The Journal's web site is located at http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_desc_e?cjb
Citation
Canadian Journal of Botany, 1996, v. 74 n. 11, p. 1789-1800 How to Cite?
AbstractSpore attachment of the saprobic aquatic Hyphomycetes Lemonniera aquatica and Mycocentrospora filiformis was compared on Thermanox cover slips at the scanning and transmission electron microscope levels. The strength of attachment to Perspex discs was measured with the Fowler cell adhesion measurement module. Data are presented on the initial attachment of conidia and subsequent attachment of germ tubes, hyphae, and appressoria. Attachment at all stages was mediated by mucilage. Both fungi exhibited a similar strength of initial conidial attachment, but attachment resulted from different strategies: (i) in L. aquatica, by active release of mucilage as a result of a thigmotropic response to the substratum; (ii) in M. filiformis, by a passive process involving attachment by pre-existing conidial mucilage prior to contact with the substratum. The strength of attachment increased with settlement time. A fast germination rate, concurrent with mucilage production, resulted in the firm attachment of L. aquatica conidia, while initial germination in M. filiformis was slow and this corresponded to a comparatively weaker conidial attachment. Further increase in the strength of attachment was the result of greater hyphal development, and most importantly, by appressorium formation. All these structures were enrobed in a mucilanginous sheath, although variations were observed in the morphology and texture of mucilages. This suggested differences in chemical composition of mucilage (I) between the two fungi, and (ii) among different structures of the same fungus.
Persistent Identifierhttp://hdl.handle.net/10722/42094
ISSN
2009 Impact Factor: 1.397

 

DC FieldValueLanguage
dc.contributor.authorAu, WTen_HK
dc.contributor.authorJones, EBGen_HK
dc.contributor.authorMoss, STen_HK
dc.contributor.authorHodgkiss, IJen_HK
dc.date.accessioned2007-01-08T02:28:49Z-
dc.date.available2007-01-08T02:28:49Z-
dc.date.issued1996en_HK
dc.identifier.citationCanadian Journal of Botany, 1996, v. 74 n. 11, p. 1789-1800en_HK
dc.identifier.issn0008-4026en_HK
dc.identifier.urihttp://hdl.handle.net/10722/42094-
dc.description.abstractSpore attachment of the saprobic aquatic Hyphomycetes Lemonniera aquatica and Mycocentrospora filiformis was compared on Thermanox cover slips at the scanning and transmission electron microscope levels. The strength of attachment to Perspex discs was measured with the Fowler cell adhesion measurement module. Data are presented on the initial attachment of conidia and subsequent attachment of germ tubes, hyphae, and appressoria. Attachment at all stages was mediated by mucilage. Both fungi exhibited a similar strength of initial conidial attachment, but attachment resulted from different strategies: (i) in L. aquatica, by active release of mucilage as a result of a thigmotropic response to the substratum; (ii) in M. filiformis, by a passive process involving attachment by pre-existing conidial mucilage prior to contact with the substratum. The strength of attachment increased with settlement time. A fast germination rate, concurrent with mucilage production, resulted in the firm attachment of L. aquatica conidia, while initial germination in M. filiformis was slow and this corresponded to a comparatively weaker conidial attachment. Further increase in the strength of attachment was the result of greater hyphal development, and most importantly, by appressorium formation. All these structures were enrobed in a mucilanginous sheath, although variations were observed in the morphology and texture of mucilages. This suggested differences in chemical composition of mucilage (I) between the two fungi, and (ii) among different structures of the same fungus.en_HK
dc.format.extent12290564 bytes-
dc.format.extent25600 bytes-
dc.format.extent607207 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.format.mimetypeapplication/pdf-
dc.languageengen_HK
dc.publisherN R C Research Press. The Journal's web site is located at http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_desc_e?cjben_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsCanadian Journal of Botany. Copyright © N R C Research Press.en_HK
dc.subjectAquatic hyphomycetesen_HK
dc.subjectAppressoriumen_HK
dc.subjectUltrastructureen_HK
dc.subjectMucilageen_HK
dc.subjectGerminationen_HK
dc.titleThe role of mucilage in the attachment of conidia, germ tubes and appressoria in the saprobic aquatic hyphomycetes Lemonniera aquatica and Mycocentrospora filiformisen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0008-4026&volume=74&issue=11&spage=1789&epage=1800&date=1996&atitle=The+role+of+mucilage+in+the+attachment+of+conidia,+germ+tubes+and+appressoria+in+the+saprobic+aquatic+hyphomycetes+Lemonniera+aquatica+and+Mycocentrospora+filiformisen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.scopuseid_2-s2.0-0030447247-
dc.identifier.hkuros23768-

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