caa a22 4500 467929718 CHVBK 20180406152940.0 cr unu---uuuuu 170328e20060701xx s 000 0 eng 10.1007/s10658-006-9016-5 doi (NATIONALLICENCE)springer-10.1007/s10658-006-9016-5 Rhamnus lycioides in Tunisia is a new aecial host of oat crown rust [Elektronische Daten] [Imran Hemmami, Mohamed Allagui, Mohamed Chakroun, Mohamed Gazzah] Puccinia coronata was not previously described on Rhamnus spp. in Tunisia. Three sites in the northwest of Tunisia, where Rhamnus is reported to be abundant, were surveyed for the presence of pycnia and aecia of oat crown rust caused by Puccinia coronata f. sp. avenae. Two Rhamnus species (R. lycioides and R. alaternus) were encountered in the sites. Pycnia with viable pycniospores and aecia with viable aeciospores were found on R. lycioides. However, no characteristic structures of crown rust were found on R. alaternus. Aeciospores collected from leaves of R. lycioides were used to inoculate oat plants usually susceptible to oat crown rust. Typical uredinia containing oat crown rust urediniospores appeared on the leaves of these plants. Moreover, the sixteen Pc-gene differential oat lines, used by oat researchers to study the virulence pattern in oat crown rust populations, were artificially inoculated with aeciospores from R. lycioides. These inoculated lines showed resistance/susceptibility similar to the registered resistance level of these lines to crown rust under field conditions in Tunisia. These results indicate that R. lycioides, a common and endemic part of the vegetation in the northwest of Tunisia, is a new aecial host of oat crown rust. The aeciospores produced on this forest plant could constitute the source of the virulence diversity already detected via the Pc-gene line trials. Springer Science+Business Media B.V., 2006 aeciospores nationallicence pathogenic variability nationallicence Pc -gene lines nationallicence Puccinia coronata f. sp . avenae nationallicence Hemmami Imran Institut National de la Recherche Agronomique de Tunisie (INRAT), rue Hédi Karray, 2080, Ariana, Tunisia aut Allagui Mohamed Institut National de la Recherche Agronomique de Tunisie (INRAT), rue Hédi Karray, 2080, Ariana, Tunisia aut Chakroun Mohamed Institut National de la Recherche Agronomique de Tunisie (INRAT), rue Hédi Karray, 2080, Ariana, Tunisia aut Gazzah Mohamed Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis, Tunisia aut European Journal of Plant Pathology Kluwer Academic Publishers 115/3(2006-07-01), 357-361 0929-1873 115:3<357 2006 115 10658 https://doi.org/10.1007/s10658-006-9016-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10658-006-9016-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hemmami Imran Institut National de la Recherche Agronomique de Tunisie (INRAT), rue Hédi Karray, 2080, Ariana, Tunisia aut NATIONALLICENCE 700 1- Allagui Mohamed Institut National de la Recherche Agronomique de Tunisie (INRAT), rue Hédi Karray, 2080, Ariana, Tunisia aut NATIONALLICENCE 700 1- Chakroun Mohamed Institut National de la Recherche Agronomique de Tunisie (INRAT), rue Hédi Karray, 2080, Ariana, Tunisia aut NATIONALLICENCE 700 1- Gazzah Mohamed Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis, Tunisia aut NATIONALLICENCE 773 0- European Journal of Plant Pathology Kluwer Academic Publishers 115/3(2006-07-01), 357-361 0929-1873 115:3<357 2006 115 10658 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer