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Phytophthora Root and Collar Rot of Paulownia, a New Disease for Europe
- Source :
- Forests; Volume 12; Issue 12; Pages: 1664, Forests, Vol 12, Iss 1664, p 1664 (2021)
- Publication Year :
- 2021
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2021.
-
Abstract
- Paulownia species are fast growing trees native to China, which are being grown in managed plantings in several European countries for the production of wood and biomasses. In 2018, wilting, stunting, leaf yellowing, and collapse, as a consequence of root and crown rot, were observed in around 40% of trees of a 2-year-old planting of Paulownia elongata × P. fortunei in Calabria (Southern Italy). Two species of Phytophthora were consistently recovered from roots, basal stem bark, and rhizosphere soil of symptomatic trees and were identified as Ph. nicotianae and Ph. palmivora on the basis of both morphological characteristics and phylogenetic analysis of rDNA ITS sequences. Koch’s postulates were fulfilled by reproducing the symptoms on potted paulownia saplings transplanted into infested soil or stem-inoculated by wounding. Both Phytophthora species were pathogenic and caused root rot and stem cankers. Even though P. palmivora was the only species recovered from roots of naturally infected plants, in pathogenicity tests through infested soil P. nicotianae was more virulent. This is the first report of Phytophthora root and crown rot of a Paulownia species in Europe. Strategies to prevent this emerging disease include the use of healthy nursery plants, choice of well-drained soils for new plantations, and proper irrigation management.
- Subjects :
- Phytophthora heterospora
ph
Phytophthora palmivora
Paulownia
complex mixtures
Paulownia elongata
Root rot
DNA sequencing
pathogenicity
QK900-989
Plant ecology
Biomass and timber, DNA sequencing, Nursery plants, Pathogenicity, Paulownia elongata × P. fortunei, Phylogenetic analysis, Phytophthora heterospora, Phytophthora nicotianae, Phytophthora palmivora, Princess tree, Tree of life
Rhizosphere
Paulownia elongata × P. fortunei
biology
princess tree
tree of life
Phytophthora nicotianae
phylogenetic analysis
managed plantings
biomass and timber
nursery plants
fungi
Settore AGR/12 - Patologia Vegetale
food and beverages
Forestry
biology.organism_classification
Horticulture
Collar rot
Phytophthora
Subjects
Details
- Language :
- English
- ISSN :
- 19994907
- Database :
- OpenAIRE
- Journal :
- Forests; Volume 12; Issue 12; Pages: 1664
- Accession number :
- edsair.doi.dedup.....7926ff0d241f3f59c071286564a41cf7
- Full Text :
- https://doi.org/10.3390/f12121664