27 research outputs found
Contribuição para o conhecimento de Chytridiomycota da "Reserva Biológica de Paranapiacaba", Santo André, SP, Brasil
Diverse organizations of actin and nuclei underpin the evolution of indeterminate growth in Chytridiomycota and Dikarya
Stages of infection and ecological effects of a fungal epidemic on the eggs of a limnetic copepod
Kalyptorhynchia (Plathelminthes Rhabdocoela) from the Kenyan Coast, with descriptions of four new species
The host range of Polymyxa betae in Britain
The host range of Polymyxa betae on common arable weed species in Britain was determined by growing plants in naturally infested soil and examining their root systems for the presence of resting spores (cystosori). Of the 24 species tested, only Atriplex patula and Chenopodium album of the Chenopodiaceae, and Silene alba of the Caryophyllaceae, were found to be heavily infected. S. alba is a newly recorded host species for Polymyxa. The host specificity of isolates of P. betae from Beta vulgaris, C. album and A. patula was investigated by observing which of 11 test plants could be infected by the isolates obtained from this soil, Three main biotypes of P. betae appeared to be distinguishable: one which was able to infect all chenopodiaceous species; one which had a narrower host range; and one which was able to infect S. alba. The role of weed species in the epidemiology of rhizomania is discussed