caa a22 4500 467929637 CHVBK 20180406152939.0 cr unu---uuuuu 170328e20060701xx s 000 0 eng 10.1007/s10658-006-9015-6 doi (NATIONALLICENCE)springer-10.1007/s10658-006-9015-6 Macroscopic and Histological Characterisation of Genes er1 and er2 for Powdery Mildew Resistance in Pea [Elektronische Daten] [S. Fondevilla, T. Carver, M. Moreno, D. Rubiales] In pea, two single recessive genes, er1 and er2, have been identified for resistance to powdery mildew caused by Erysiphe pisi, but little is known about their mode of action. Pea accessions carrying the genes er1 or er2 and other accessions displaying resistance to powdery mildew in the field were studied. In accessions carrying gene er1, epidermal cell penetration was prevented and very few haustoria or colonies were formed. Under controlled conditions, er1 conferred complete or almost complete resistance to the fungal isolates used and this resistance was not associated with macroscopically visible necrosis. Under field conditions these accessions developed a low level of disease. Resistance in line JI2480 (carrying er2) increased with temperature and leaf age, and complete resistance was expressed only at high temperature (25°C) or in mature leaves. This resistance was based mainly on post-penetration cell death, complemented by a reduction of percentage penetration success in mature leaves. Combining the resistance provided by gene er1 and by line JI2480 into new cultivars is likely to increase their level of resistance and enhance durability of the protection. Springer, 2006 grain legumes nationallicence haustorium nationallicence histology nationallicence hypersensitive resistance nationallicence Fondevilla S. IFAPACICE, CIFA-Alameda del Obispo, Apdo. 3092, E-14080, Córdoba, Spain aut Carver T. Institute of Grassland and Environmental Research, SY23 3EB, Aberystwyth, Ceredigion, UK aut Moreno M. IFAPACICE, CIFA-Alameda del Obispo, Apdo. 3092, E-14080, Córdoba, Spain aut Rubiales D. CSIC, Instituto de Agricultura Sostenible, Apdo. 4084, E-14080, Córdoba, Spain aut European Journal of Plant Pathology Kluwer Academic Publishers 115/3(2006-07-01), 309-321 0929-1873 115:3<309 2006 115 10658 https://doi.org/10.1007/s10658-006-9015-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10658-006-9015-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fondevilla S. IFAPACICE, CIFA-Alameda del Obispo, Apdo. 3092, E-14080, Córdoba, Spain aut NATIONALLICENCE 700 1- Carver T. Institute of Grassland and Environmental Research, SY23 3EB, Aberystwyth, Ceredigion, UK aut NATIONALLICENCE 700 1- Moreno M. IFAPACICE, CIFA-Alameda del Obispo, Apdo. 3092, E-14080, Córdoba, Spain aut NATIONALLICENCE 700 1- Rubiales D. CSIC, Instituto de Agricultura Sostenible, Apdo. 4084, E-14080, Córdoba, Spain aut NATIONALLICENCE 773 0- European Journal of Plant Pathology Kluwer Academic Publishers 115/3(2006-07-01), 309-321 0929-1873 115:3<309 2006 115 10658 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer