caa a22 4500 469042001 CHVBK 20180323132813.0 cr unu---uuuuu 170328e19921101xx s 000 0 eng 10.1007/BF01974463 doi (NATIONALLICENCE)springer-10.1007/BF01974463 Voorrips Roeland DLO-Center for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, the Netherlands aut Root hair infection by Plasmodiophora brassicae in clubrootresistant and susceptible genotypes of Brassica oleracea, B. rapa and B. napus [Elektronische Daten] [Roeland Voorrips] The pathogenesis of clubroot, a disease of cruciferous crops caused by the fungusPlasmodiophora brassicae, starts with infection of the root hairs. This process was studied in 13 accessions ofBrassica oleracea, B. napus and B. rapa with varying levels of plant resitance toP. brassicae. Seedlings were grown in a mineral solution, inoculated with resting spores ofP. brassicae, and the number of plasmodia developing in root hairs was recorded. When compared with the standard susceptible cultivar Septa, both higher and lower resistance to root hair infection was found in the accessions of the differentBrassica species. No complete resistance to root hair infection was found. Over the accessions studied, there was no correlation between the plant resistance estimated from greenhouse tests and the resistance to root hair infection of seedlings. The resistance of all accessions must at least partly be caused by other mechanisms which operate after the root hair plasmodia are formed. Koninklijke Nederlandse Planteziektenkundige Vereniging, 1992 Brassica campestris nationallicence nutrient solution culture nationallicence plasmodium nationallicence zoospore nationallicence Netherlands Journal of Plant Pathology Kluwer Academic Publishers 98/6(1992-11-01), 361-368 0028-2944 98:6<361 1992 98 10658 https://doi.org/10.1007/BF01974463 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01974463 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Voorrips Roeland DLO-Center for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA, Wageningen, the Netherlands aut NATIONALLICENCE 773 0- Netherlands Journal of Plant Pathology Kluwer Academic Publishers 98/6(1992-11-01), 361-368 0028-2944 98:6<361 1992 98 10658 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer