| studies on structure-activity relationship of seiridins, phytotoxins, produced by three species of seiridium. | the phytotoxins seiridin (sei) and iso-seiridin (ise), two delta alpha,beta-butenolides produced in vitro by seiridium cardinale, s. cupressi, and s. unicorne, as well as their derivatives obtained by chemical modification of each toxin, were analyzed for their bioactivity. the effects each compound on host and non-host plants and their antimicrobial activity on bacteria were investigated. the toxicity of both seiridins (seis) decreased in the derivatives with modifications of the gamma-lactone ... | 1995 | 7648025 |
| efficient transmission of an introduced pathogen via an ancient insect-fungus association | in cupressus sempervirens the association between seed insects and tree pathogens has resulted in optimal exploitation of the cones. a fungus-infected cone can be inhabited by the nymphs of a true seed bug (orsillus maculatus), the adults of which may carry a heavy spore load at emergence. cones are infected when eggs are laid within the cone, most frequently via the emergence holes of a seed wasp (megastigmus wachtli). this symbiotic association evolved with the nonaggressive fungus pestalotiop ... | 1999 | 10541657 |
| cypress pollen: botanic aspects in fourteen cypress species and prospects for research. | the two research institutes, the cnr (national research institute, italy) and the inra (institut national de recherche agronomique, france) which have been collaborating on the problem of cypress canker from seiridium cardinale since 1975 in the context of eu projects, have measured in the sem the pollen size of fourteen species of cypress, determining the differences between the maximum diameter of 100 granules per species and noting differences in pollen colour. a research strategy based on th ... | 2000 | 10815245 |
| cypress canker: a pandemic in progress. | over the past 70 years a destructive blight of cupressus macrocarpa and other cupressaceae, caused by seiridium cardinale, has spread worldwide from california, devastating forests, plantations, and ornamental cypresses. the epidemic has been particularly severe in the mediterranean region, on c. sempervirens. a similar destructive blight induced by lepteutypa cupressi, which caused serious losses to monterey cypresses in east africa in the 1940s, has now also spread to distant continents, albei ... | 1998 | 15012494 |
| a pcr-rflp based diagnostic technique to rapidly identify seiridium species causing cypress canker. | seiridium cardinale, s. cupressi and s. unicorne represent three distinct species of fungi that cause cankers on cupressus species and the disease collectively known as cypress canker. these fungi cannot be distinguished reliably from each other using morphological characters or ribosomal dna sequence data. here we describe a rflp assay based on digesting β-tubulin amplicons with a single endonuclease, haeiii, which easily can be used to distinguish among these three species. this rflp assay pro ... | 2004 | 21148958 |
| permanent genetic resources added to molecular ecology resources database 1 january 2009-30 april 2009. | this article documents the addition of 283 microsatellite marker loci to the molecular ecology resources database. loci were developed for the following species: agalinis acuta; ambrosia artemisiifolia; berula erecta; casuarius casuarius; cercospora zeae-maydis; chorthippus parallelus; conyza canadensis; cotesia sesamiae; epinephelus acanthistius; ficedula hypoleuca; grindelia hirsutula; guadua angustifolia; leucadendron rubrum; maritrema novaezealandensis; meretrix meretrix; nilaparvata lugens; ... | 2009 | 21564911 |
| Sequence and Simple-Sequence Repeat Analyses of the Fungal Pathogen Seiridium cardinale Indicate California Is the Most Likely Source of the Cypress Canker Epidemic for the Mediterranean Region. | ABSTRACT Seiridium cardinale is the pathogenic fungus of unknown origin responsible for a world pandemic known as cypress canker affecting several species of Cupressaceae in both the Northern and Southern Hemisphere. In this study, a comparative genetic analysis of worldwide populations was performed using sequence analysis of a portion of the ?-tubulin locus and seven polymorphic simple-sequence repeat (SSR) loci on 96 isolates. Sequence analysis identified two distinct ?-tubulin alleles, bot ... | 2011 | 21879790 |
| structural characterization of the o-chain polysaccharide from an environmentally beneficial bacterium pseudomonas chlororaphis subsp. aureofaciens strain m71. | pseudomonas chlororaphis subsp. aureofaciens strain m71 was isolated from the root of a tomato plant and it was able to control in vivo fusarium oxysporum f. sp. radicis-lycopersici responsible for the tomato crown and root rot. recently, strain m71 was evaluated even for its efficacy in controlling seiridium cardinale, the causal agent of bark canker of common cypress (cupressus sempervirens l.). strain m71 ability to persist on the tomato rhizosphere and on the aerial part of cypress plants co ... | 2011 | 22036123 |