| phylogenetic relationships between members of the crucifer pathogenic leptosphaeria maculans species complex as shown by mating type (mat1-2), actin, and beta-tubulin sequences. | the dothideomycetous fungus leptosphaeria maculans comprises a complex of species differing in specificity and pathogenicity on brassica napus. twenty-eight isolates were investigated and compared to 20 other species of the pleosporales order. sequences of the mating type mat1-2 (23), fragments of actin (48) and beta-tubulin (45) genes were determined and used for phylogenetic analyses inferred by maximum parsimony, distance, maximum likelihood, and bayesian approaches. these different approache ... | 2005 | 16122948 |
| inactivation of plant infecting fungal and viral pathogens to achieve biological containment in drainage water using uv treatment. | to explore whether ultraviolet (uv) light treatment within a closed circulating and filtered water drainage system can kill plant pathogenic species. | 2011 | 21226796 |
| substrate specificity and inhibition of brassinin hydrolases, detoxifying enzymes from the plant pathogens leptosphaeria maculans and alternaria brassicicola. | blackleg (leptosphaeria maculans and leptosphaeria biglobosa) and black spot (alternaria brassicicola) fungi are devastating plant pathogens known to detoxify the plant defence metabolite, brassinin. the significant roles of brassinin as a crucifer phytoalexin and as a biosynthetic precursor of several other plant defences make it important in plant fitness. brassinin detoxifying enzymes produced by l. maculans and a. brassicicola catalyse the detoxification of brassinin by hydrolysis of its dit ... | 2009 | 19922473 |
| occurrence of a new subclade of leptosphaeria biglobosa in western australia. | stem canker of crucifers is caused by an ascomycete species complex comprising of two main species, leptosphaeria maculans and l. biglobosa. these are composed of at least seven distinct subclades based on biochemical data or on sequences of internal transcribed spacer (its), the mating type mat1-2 or fragments of actin or beta-tubulin genes. in the course of a wide-scale characterization of the race structure of l. maculans from western australia, a few isolates from two locations failed to amp ... | 2008 | 18944083 |
| brassinin oxidase, a fungal detoxifying enzyme to overcome a plant defense -- purification, characterization and inhibition. | blackleg fungi [leptosphaeria maculans (asexual stage phoma lingam) and leptosphaeria biglobosa] are devastating plant pathogens with well-established stratagems to invade crucifers, including the production of enzymes that detoxify plant defenses such as phytoalexins. the significant roles of brassinin, both as a potent crucifer phytoalexin and a biosynthetic precursor of several other plant defenses, make it critical to plant fitness. brassinin oxidase, a detoxifying enzyme produced by l. macu ... | 2008 | 18549452 |
| the phytopathogenic fungi leptosphaeria maculans and leptosphaeria biglobosa: chemotaxonomical characterization of isolates and metabolite production in different culture media. | previous molecular chemotaxonomic analyses of isolates of the plant pathogenic fungus leptosphaeria maculans (desm.) ces. et de not. (asexual stage phoma lingam (tode ex fr.) desm.) in a chemically defined medium suggested that this species complex was composed of at least three distinct groups. subsequently, a group within l. maculans was classified as leptosphaeria biglobosa, on the basis of morphologic characteristics and the lack of sexual crossing. to obtain clarification regarding the meta ... | 2007 | 17538645 |