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Phytophthora Root and Collar Rot of Paulownia, a New Disease for Europe

2021

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…

Phytophthora heterosporaphPhytophthora palmivoraPaulowniacomplex mixturesPaulownia elongataRoot rotDNA sequencing; phpathogenicityDNA sequencingQK900-989Plant ecologyBiomass and timber DNA sequencing Nursery plants Pathogenicity Paulownia elongata × P. fortunei Phylogenetic analysis Phytophthora heterospora Phytophthora nicotianae Phytophthora palmivora Princess tree Tree of lifeRhizospherePaulownia elongata × P. fortuneibiologyprincess tree; tree of life; Phytophthora nicotianae; Phytophthora palmivora; Phytophthora heterospora; DNA sequencing; phylogenetic analysis; managed plantings; biomass and timber; nursery plants; pathogenicityphylogenetic analysis<i>Phytophthora palmivora</i>fungiSettore AGR/12 - Patologia Vegetalefood and beveragesForestryPhytophthora nicotianaePhytophthora palmivoraPhytophthora nicotianaebiology.organism_classification<i>Phytophthora heterospora</i>Horticulturetree of lifeCollar rot<i>Phytophthora nicotianae</i>princess treePhytophthoraprincess tree; tree of life; <i>Phytophthora nicotianae</i>; <i>Phytophthora palmivora</i>; <i>Phytophthora heterospora</i>; DNA sequencing; phylogenetic analysis; <i>Paulownia elongata</i> × <i>P. fortunei</i>; biomass and timber; nursery plants; pathogenicityForests; Volume 12; Issue 12; Pages: 1664
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