title: High expression of a sucrose non-fermenting (SNF1)-related protein kinase from Colletotrichum gloeosporoides f. sp. malvae is associated with penetration of Malva pusilla.
abstract: A sucrose non-fermenting (SNF1)-related protein kinase homologue, cgsnf, from Colletotrichum gloeosporoides f. sp. malvae, a hemibiotrophic fungal pathogen of round-leaved mallow (Malva pusilla) was examined. During infection, cgsnf showed a large peak in expression relative to a constitutively expressed fungal actin gene when appressoria had formed during the penetration phase and then showed much lower expression levels during subsequent necrotrophic growth in the host. In pure culture with glucose or glycerol as sole carbon sources, expression levels were similar to that during necrotrophic growth. Expression was consistently higher in glycerol than in glucose cultures, which may reflect a lower cellular energy status in the fungus. These results are consistent with cgsnf having a role in transmitting nutritional signals, which may be involved with host penetration.
authors.affiliation: Department of Environmental Biology, University of Guelph, ON, Canada NiG 2W1. pgoodwin@uoguelph.ca
authors.forename: Paul H
authors.initials: PH
authors.lastname: Goodwin
authors.forename: Grace Y-J
authors.initials: GY
authors.lastname: Chen
mesh_terms: D000595:Amino Acid Sequence; D003001:Cloning, Molecular; D020231:Colletotrichum / Q000201:enzymology* / Q000254:growth & development / Q000472:pathogenicity*; D003470:Culture Media; D015966:Gene Expression Regulation, Fungal; D028501:Malva / Q000382:microbiology*; D008969:Molecular Sequence Data; D010935:Plant Diseases / Q000382:microbiology*; D017346:Protein Serine-Threonine Kinases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D017422:Sequence Analysis, DNA
chemical_list: D003470:Culture Media; C071570:SNF1-related protein kinases; D017346:Protein Serine-Threonine Kinases