caa a22 4500 467929769 CHVBK 20180406152940.0 cr unu---uuuuu 170328e20060801xx s 000 0 eng 10.1007/s10658-006-9034-3 doi (NATIONALLICENCE)springer-10.1007/s10658-006-9034-3 Phenotypic and histological expression of different genetic backgrounds in interactions between lettuce, wild Lactuca spp., L. sativa × L. serriola hybrids and Bremia lactucae [Elektronische Daten] [Aleš Lebeda, Michaela Sedlářová, James Lynn, David Pink] Phenotypic and histological responses of cultivated lettuce (Lactuca sativa) and wild relatives L. saligna, L.␣virosa as well as interspecific crosses derived from L. sativa × L. serriola to two races of Bremia lactucae (CS2, CS9) were investigated. With the exception of L. sativa genotypes, all accessions and hybrids expressed incomplete or complete resistance to both pathogen races, with slight differences at seedling and adult plant stages, respectively. Histological features of the interactions (development of pathogen infection structures and host hypersensitive response to attempted infection) were studied on leaf discs 48h after inoculation. Interactions with similar phenotypic expression of resistance were characterized by significant variation in rate of development of pathogen infection structures and hypersensitive reactions. Differences found within eight Lactuca spp. accessions and hybrids challenged by two distinct pathogen races are interpreted and discussed. Springer Science+Business Media, Inc., 2006 hypersensitive reaction nationallicence infection structures nationallicence interspecific hybrids nationallicence lettuce downy mildew nationallicence race-specificity nationallicence resistance mechanisms nationallicence wild lettuce nationallicence dai : days after inoculation nationallicence hai : hours after inoculation nationallicence HR : hypersensitive reaction nationallicence ID : infection degree nationallicence IH : intercellular hyphae nationallicence IMD : irreversible membrane damage nationallicence IS : infection site nationallicence ITRH : intracellular hyphae nationallicence ITERH : intercellular hyphae nationallicence NC : number of necrotic epidermal cells per infection site nationallicence PV : primary vesicle nationallicence SV : secondary vesicle nationallicence SEN : subepidermal necrosis nationallicence PN : proportion of infection sites with necrotic epidermal cells nationallicence Lebeda Aleš Faculty of Science, Department of Botany, Palacký University, Šlechtitelů 11, 783 71, Olomouc-Holice, Czech Republic aut Sedlářová Michaela Faculty of Science, Department of Botany, Palacký University, Šlechtitelů 11, 783 71, Olomouc-Holice, Czech Republic aut Lynn James Warwick HRI, University of Warwick, CV35 9EF, Wellesbourne, Warwick, UK aut Pink David Warwick HRI, University of Warwick, CV35 9EF, Wellesbourne, Warwick, UK aut European Journal of Plant Pathology Kluwer Academic Publishers 115/4(2006-08-01), 431-441 0929-1873 115:4<431 2006 115 10658 https://doi.org/10.1007/s10658-006-9034-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10658-006-9034-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lebeda Aleš Faculty of Science, Department of Botany, Palacký University, Šlechtitelů 11, 783 71, Olomouc-Holice, Czech Republic aut NATIONALLICENCE 700 1- Sedlářová Michaela Faculty of Science, Department of Botany, Palacký University, Šlechtitelů 11, 783 71, Olomouc-Holice, Czech Republic aut NATIONALLICENCE 700 1- Lynn James Warwick HRI, University of Warwick, CV35 9EF, Wellesbourne, Warwick, UK aut NATIONALLICENCE 700 1- Pink David Warwick HRI, University of Warwick, CV35 9EF, Wellesbourne, Warwick, UK aut NATIONALLICENCE 773 0- European Journal of Plant Pathology Kluwer Academic Publishers 115/4(2006-08-01), 431-441 0929-1873 115:4<431 2006 115 10658 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer