{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,25]],"date-time":"2026-02-25T01:03:58Z","timestamp":1771981438692,"version":"3.50.1"},"reference-count":84,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2021,10,16]],"date-time":"2021-10-16T00:00:00Z","timestamp":1634342400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JoF"],"abstract":"<jats:p>Since 1999, an unusual Phytophthora species has repeatedly been found associated with stem lesions and root and collar rot on young olive trees in Southern Italy. In all cases, this species was obtained from recently established commercial plantations or from nursery plants. Morphologically, the Phytophthora isolates were characterized by the abundant production of caducous non-papillate conidia-like sporangia (pseudoconidia) and caducous papillate sporangia with a short pedicel, resembling P. palmivora var. heterocystica. Additional isolates with similar features were obtained from nursery plants of Ziziphus spina-christi in Iran, Juniperus oxycedrus and Capparis spinosa in Italy, and mature trees in commercial farms of Durio zibethinus in Vietnam. In this study, morphology, breeding system and growth characteristics of these Phytophthora isolates with peculiar features were examined, and combined mitochondrial and nuclear multigene phylogenetic analyses were performed. The proportion between pseudoconidia and sporangia varied amongst isolates and depended on the availability of free water. Oogonia with amphigynous antheridia and aplerotic oospores were produced in dual cultures with an A2 mating type strain of P. palmivora, indicating all isolates were A1 mating type. Phylogenetically, these isolates grouped in a distinct well-supported clade sister to P. palmivora; thus, they constitute a separate taxon. The new species, described here as Phytophthora heterospora sp. nov., proved to be highly pathogenic to both olive and durian plants in stem inoculation tests.<\/jats:p>","DOI":"10.3390\/jof7100870","type":"journal-article","created":{"date-parts":[[2021,10,17]],"date-time":"2021-10-17T23:05:47Z","timestamp":1634511947000},"page":"870","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":29,"title":["Phytophthora heterospora sp. nov., a New Pseudoconidia-Producing Sister Species of P. palmivora"],"prefix":"10.3390","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0690-580X","authenticated-orcid":false,"given":"Bruno","family":"Scanu","sequence":"first","affiliation":[{"name":"Department of Agricultural Sciences, University of Sassari, 07100 Sassari, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2034-0718","authenticated-orcid":false,"given":"Thomas","family":"Jung","sequence":"additional","affiliation":[{"name":"Phytophthora Research Centre, Faculty of Forestry and Wood Technology, Mendel University in Brno, 613 00 Brno, Czech Republic"},{"name":"Phytophthora Research and Consultancy, 83131 Nu\u00dfdorf, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2483-7799","authenticated-orcid":false,"given":"Hossein","family":"Masigol","sequence":"additional","affiliation":[{"name":"Department of Plant Protection, School of Agriculture, Shiraz University, Shiraz 7144165186, Iran"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2428-9905","authenticated-orcid":false,"given":"Benedetto Teodoro","family":"Linaldeddu","sequence":"additional","affiliation":[{"name":"Dipartimento Territorio e Sistemi Agro-Forestali, Universit\u00e0 Degli Studi di Padova, 35020 Legnaro, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2219-8647","authenticated-orcid":false,"given":"Mar\u00edlia Horta","family":"Jung","sequence":"additional","affiliation":[{"name":"Phytophthora Research Centre, Faculty of Forestry and Wood Technology, Mendel University in Brno, 613 00 Brno, Czech Republic"},{"name":"Phytophthora Research and Consultancy, 83131 Nu\u00dfdorf, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4569-5996","authenticated-orcid":false,"given":"Andrea","family":"Brandano","sequence":"additional","affiliation":[{"name":"Department of Agricultural Sciences, University of Sassari, 07100 Sassari, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5572-918X","authenticated-orcid":false,"given":"Reza","family":"Mostowfizadeh-Ghalamfarsa","sequence":"additional","affiliation":[{"name":"Department of Plant Protection, School of Agriculture, Shiraz University, Shiraz 7144165186, Iran"}]},{"given":"Josef","family":"Janou\u0161ek","sequence":"additional","affiliation":[{"name":"Phytophthora Research Centre, Faculty of Forestry and Wood Technology, Mendel University in Brno, 613 00 Brno, Czech Republic"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8058-5624","authenticated-orcid":false,"given":"Mario","family":"Riolo","sequence":"additional","affiliation":[{"name":"Department of Agricultural Science, Mediterranean University of Reggio Calabria, 89122 Reggio Calabria, Italy"},{"name":"Department of Agriculture, Food and Environment, University of Catania, 95123 Catania, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7926-3601","authenticated-orcid":false,"given":"Santa Olga","family":"Cacciola","sequence":"additional","affiliation":[{"name":"Department of Agriculture, Food and Environment, University of Catania, 95123 Catania, Italy"}]}],"member":"1968","published-online":{"date-parts":[[2021,10,16]]},"reference":[{"key":"ref_1","unstructured":"Erwin, D.C., and Ribeiro, O.K. 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