Diversity and Pathogenicity of <i>Botryosphaeriaceae</i> and <i>Phytophthora</i> Species Associated with Emerging Olive Diseases in Italy
Extensive collar rot, sunken and bleeding cankers, shoot blight, and fruit rot symptoms on olive trees have recently been observed in several orchards in Italy. Since there is little information about the etiology of these diseases and given the high economic relevance of this iconic crop, a study w...
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| Format: | Article |
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MDPI AG
2023-08-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/13/8/1575 |
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| author | Benedetto T. Linaldeddu Giovanni Rossetto Lucia Maddau Thomas Vatrano Carlo Bregant |
| author_facet | Benedetto T. Linaldeddu Giovanni Rossetto Lucia Maddau Thomas Vatrano Carlo Bregant |
| author_sort | Benedetto T. Linaldeddu |
| collection | DOAJ |
| description | Extensive collar rot, sunken and bleeding cankers, shoot blight, and fruit rot symptoms on olive trees have recently been observed in several orchards in Italy. Since there is little information about the etiology of these diseases and given the high economic relevance of this iconic crop, a study was conducted from autumn 2017 to summer 2022, in four Italian regions, to define the occurrence, distribution and impact of the main pathogens involved. A total of 1064 symptomatic olive samples were collected and processed. Based on colony appearance, micromorphological analysis and DNA sequence data, thirty-eight species, including eighteen <i>Botryosphaeriaceae</i> species belonging to five genera and fifteen <i>Phytophthora</i> species, were isolated and identified, thirteen of which, <i>Diplodia africana</i>, <i>D. fraxini</i>, <i>D. subglobosa</i>, <i>Dothiorella omnivora</i>, <i>Do. sarmentorum</i>, <i>Do. sempervirentis</i>, <i>Sardiniella urbana</i> (<i>Botryosphaeriaceae</i>), <i>Phytophthora cactorum</i>, <i>P. cinnamomi</i>, <i>P. citricola</i>, <i>P. crassamura</i>, <i>P. niederhauserii</i> and <i>P. pseudocryptogea</i>, are reported here for the first time in olive trees. Pathogenicity tests performed on unripe drupes and on potted olive seedlings completed Koch postulates and highlighted that several species of <i>Botryosphaeriaceae</i> and <i>Phytophthora</i> represent a growing threat to olive trees. |
| first_indexed | 2024-03-11T00:12:36Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-11T00:12:36Z |
| publishDate | 2023-08-01 |
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| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-8883c5f4475c45d2bfb6ba835004d1342023-11-18T23:52:04ZengMDPI AGAgriculture2077-04722023-08-01138157510.3390/agriculture13081575Diversity and Pathogenicity of <i>Botryosphaeriaceae</i> and <i>Phytophthora</i> Species Associated with Emerging Olive Diseases in ItalyBenedetto T. Linaldeddu0Giovanni Rossetto1Lucia Maddau2Thomas Vatrano3Carlo Bregant4Dipartimento Territorio e Sistemi Agro-Forestali, Università degli Studi di Padova, Viale dell’Università 16, 35020 Legnaro, ItalyDipartimento Territorio e Sistemi Agro-Forestali, Università degli Studi di Padova, Viale dell’Università 16, 35020 Legnaro, ItalyDipartimento di Agraria, Università degli Studi di Sassari, Viale Italia 39, 07100 Sassari, ItalyIndependent Researcher, Via Einaudi 9, 88021 Borgia, ItalyDipartimento Territorio e Sistemi Agro-Forestali, Università degli Studi di Padova, Viale dell’Università 16, 35020 Legnaro, ItalyExtensive collar rot, sunken and bleeding cankers, shoot blight, and fruit rot symptoms on olive trees have recently been observed in several orchards in Italy. Since there is little information about the etiology of these diseases and given the high economic relevance of this iconic crop, a study was conducted from autumn 2017 to summer 2022, in four Italian regions, to define the occurrence, distribution and impact of the main pathogens involved. A total of 1064 symptomatic olive samples were collected and processed. Based on colony appearance, micromorphological analysis and DNA sequence data, thirty-eight species, including eighteen <i>Botryosphaeriaceae</i> species belonging to five genera and fifteen <i>Phytophthora</i> species, were isolated and identified, thirteen of which, <i>Diplodia africana</i>, <i>D. fraxini</i>, <i>D. subglobosa</i>, <i>Dothiorella omnivora</i>, <i>Do. sarmentorum</i>, <i>Do. sempervirentis</i>, <i>Sardiniella urbana</i> (<i>Botryosphaeriaceae</i>), <i>Phytophthora cactorum</i>, <i>P. cinnamomi</i>, <i>P. citricola</i>, <i>P. crassamura</i>, <i>P. niederhauserii</i> and <i>P. pseudocryptogea</i>, are reported here for the first time in olive trees. Pathogenicity tests performed on unripe drupes and on potted olive seedlings completed Koch postulates and highlighted that several species of <i>Botryosphaeriaceae</i> and <i>Phytophthora</i> represent a growing threat to olive trees.https://www.mdpi.com/2077-0472/13/8/1575invasive pathogensdrupe rotbranch diebackroot rot |
| spellingShingle | Benedetto T. Linaldeddu Giovanni Rossetto Lucia Maddau Thomas Vatrano Carlo Bregant Diversity and Pathogenicity of <i>Botryosphaeriaceae</i> and <i>Phytophthora</i> Species Associated with Emerging Olive Diseases in Italy Agriculture invasive pathogens drupe rot branch dieback root rot |
| title | Diversity and Pathogenicity of <i>Botryosphaeriaceae</i> and <i>Phytophthora</i> Species Associated with Emerging Olive Diseases in Italy |
| title_full | Diversity and Pathogenicity of <i>Botryosphaeriaceae</i> and <i>Phytophthora</i> Species Associated with Emerging Olive Diseases in Italy |
| title_fullStr | Diversity and Pathogenicity of <i>Botryosphaeriaceae</i> and <i>Phytophthora</i> Species Associated with Emerging Olive Diseases in Italy |
| title_full_unstemmed | Diversity and Pathogenicity of <i>Botryosphaeriaceae</i> and <i>Phytophthora</i> Species Associated with Emerging Olive Diseases in Italy |
| title_short | Diversity and Pathogenicity of <i>Botryosphaeriaceae</i> and <i>Phytophthora</i> Species Associated with Emerging Olive Diseases in Italy |
| title_sort | diversity and pathogenicity of i botryosphaeriaceae i and i phytophthora i species associated with emerging olive diseases in italy |
| topic | invasive pathogens drupe rot branch dieback root rot |
| url | https://www.mdpi.com/2077-0472/13/8/1575 |
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