One stop shop: backbones trees for important phytopathogenic genera: I (2014)

Many fungi are pathogenic on plants and cause significant damage in agriculture and forestry. They are also part of the natural ecosystem and may play a role in regulating plant numbers/density. Morphological identification and analysis of plant pathogenic fungi, while important, is often hampered by the scarcity of discriminatory taxonomic characters and the endophytic or inconspicuous nature of these fungi. Molecular (DNA sequence) data for plant pathogenic fungi have emerged as key information for diagnostic and classification studies, although hampered in part by non-standard laboratory practices and analytical methods. To facilitate current and future research, this study provides phylogenetic synopses for 25 groups of plant pathogenic fungi in the Ascomycota, Basidiomycota, Mucormycotina (Fungi), and Oomycota, using recent molecular data, up-to-date names, and the latest taxonomic insights. Lineage-specific laboratory protocols together with advice on their application, as well as general observations, are also provided. We hope to maintain updated backbone trees of these fungal lineages over time and to publish them jointly as new data emerge. Researchers of plant pathogenic fungi not covered by the present study are invited to join this future effort. Bipolaris, Botryosphaeriaceae, Botryosphaeria, Botrytis, Choanephora, Colletotrichum, Curvularia, Diaporthe, Diplodia, Dothiorella, Fusarium, Gilbertella, Lasiodiplodia, Mucor, Neofusicoccum, Pestalotiopsis, Phyllosticta, Phytophthora, Puccinia, Pyrenophora, Pythium, Rhizopus, Stagonosporopsis, Ustilago and Verticillium are dealt with in this paper

Flowering biology of the seagrass Zostera marina L.

Contains fulltext : mmubn000001_026719983.pdf (publisher's version ) (Open Access)Promotores : H. Linskens en C. den Hartog99 p

The genus Blomia Oudemans (Acari: Glycyphagidae). I. Description of Blomia tropicalis sp.n. from house dust in tropical and sub-tropical regions

Since the rediscovery of the role of mites in provoking house-dust allergies (VOORHORST et al. 1964) more attention has been paid to the mite fauna of house dusts of different geographical areas. Blomia has been found in house dust in Taipei (Taiwan) and Paramaribo (Surinam), some times in large numbers (OSHIMA 1970, BRONSWIJK 1972). Allergological investigations (MIYAMOTO et al. r969) showed a cross antigenicity with Dermatophagoides farinae Hughes 1961 indicating that Blomia could be important in the house-dust allergy problem in Japan. Taxonomical investigations revealed that a not yet described species Blomia tropicalis sp. n. is involved

The genus Blomia Oudemans (Acari: Glycyphagidae). I. Description of Blomia tropicalis sp.n. from house dust in tropical and sub-tropical regions

Since the rediscovery of the role of mites in provoking house-dust allergies (VOORHORST et al. 1964) more attention has been paid to the mite fauna of house dusts of different geographical areas. Blomia has been found in house dust in Taipei (Taiwan) and Paramaribo (Surinam), some times in large numbers (OSHIMA 1970, BRONSWIJK 1972). Allergological investigations (MIYAMOTO et al. r969) showed a cross antigenicity with Dermatophagoides farinae Hughes 1961 indicating that Blomia could be important in the house-dust allergy problem in Japan. Taxonomical investigations revealed that a not yet described species Blomia tropicalis sp. n. is involved

A comparison of Morphology, Pathogenicity and Restriction Fragment Patterns of Mitochondrial DNA Among Isolates of Phytophthora porri Foister.

Thirteen strains ofPhytophthora porri from five different hosts were compared with respect to their morphology, cardinal temperatures for growth, pathogenicity to leek and cabbage and restriction fragment patterns of mitochondrial DNA. Morphology of vegetative growth was rather similar in most isolates. Those characters which differed among isolates showed overlapping variability and could not be used to distinguish groups, with the exception of production of oogonia and sporangia and the antheridium type. Considerable differences were found in restriction patterns of mitochondrial DNA, isolates from the same host mostly showing identical patterns. Isolates from differentAllium species showed relatively similar restriction patterns if compared to the other isolates. Isolates fromBrassica oleracea proved to be a homogeneous group, quite different from the others with respect to restriction patterns, production of sporangia, production of oogonia, antheridium type and pathogenicity. One isolate, CBS 366.59, isolated from and pathogenic toA. porrum, deviated in many characters from the other isolates. It showed the restriction patterns ofPhytophthora nicotianae and also the high cardinal temperatures for growth typical for this species. The sporangia, however, were distinctly non-papillate and the majority of antheridia was of the paragynous type

The Phytophthora Genus Anno 2012

Plant diseases caused by Phytophthora species will remain an ever increasing threat to agriculture and natural ecosystems. Phytophthora literally means plant destroyer, a name coined in the 19th century by Anton de Bary when he investigated the potato disease that set the stage for the Great Irish Famine. Phytophthora infestans, the causal agent of potato late blight, was the first species in a genus that at present has over 100 recognized members. In the last decade, the number of recognized Phytophthora species has nearly doubled and new species are added almost on a monthly basis. Here we present an overview of the 10 clades that are currently distinguished within the genus Phytophthora with special emphasis on new species that have been described since 1996 when Erwin and Ribeiro published the valuable monograph ‘Phytophthora diseases worldwide’ (35