Ana Carolina Lyra Brumat, Celso Garcia Auer, Dauri José Tessmann, Henrique da Silva Silveira Duarte, Álvaro Figueredo dos Santos
{"title":"First report of Phytophthora macrochlamydospora associated with tree decline in Pinus taeda in Brazil","authors":"Ana Carolina Lyra Brumat, Celso Garcia Auer, Dauri José Tessmann, Henrique da Silva Silveira Duarte, Álvaro Figueredo dos Santos","doi":"10.1111/efp.12840","DOIUrl":null,"url":null,"abstract":"<p>In 2019, 18-year-old <i>Pinus taeda</i> trees with symptoms of chlorosis in the aerial part, shortening of needles and reduced plant growth, ultimately leading to tree decline, were found in plantations in southern Brazil. When collecting roots, a reduction in the volume of fine roots in trees and absence of ectomycorrhiza was observed. An oomycete was isolated from the roots and soil of the rhizosphere, and its pathogenicity was confirmed through Koch's postulates. The morphological characteristics of this oomycete were similar to the <i>Phytophthora macrochlamydospora</i>, which was confirmed by the molecular characterization from three gene regions (ITS-rDNA, COX I and TEF1α). This is the first report of <i>P. macrochlamydospora</i> associated with tree decline in <i>P. taeda</i> in Brazil and worldwide.</p>","PeriodicalId":55153,"journal":{"name":"Forest Pathology","volume":"53 6","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Forest Pathology","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/efp.12840","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"FORESTRY","Score":null,"Total":0}
引用次数: 0
Abstract
In 2019, 18-year-old Pinus taeda trees with symptoms of chlorosis in the aerial part, shortening of needles and reduced plant growth, ultimately leading to tree decline, were found in plantations in southern Brazil. When collecting roots, a reduction in the volume of fine roots in trees and absence of ectomycorrhiza was observed. An oomycete was isolated from the roots and soil of the rhizosphere, and its pathogenicity was confirmed through Koch's postulates. The morphological characteristics of this oomycete were similar to the Phytophthora macrochlamydospora, which was confirmed by the molecular characterization from three gene regions (ITS-rDNA, COX I and TEF1α). This is the first report of P. macrochlamydospora associated with tree decline in P. taeda in Brazil and worldwide.
期刊介绍：
This peer reviewed, highly specialized journal covers forest pathological problems occurring in any part of the world. Research and review articles, short communications and book reviews are addressed to the professional, working with forest tree diseases caused by fungi, bacteria, nematodes, viruses, and phytoplasms; their biology, morphology, and pathology; disorders arising from genetic anomalies and physical or chemical factors in the environment. Articles are published in English.
Fields of interest: Forest pathology, effects of air pollution and adverse environmental conditions on trees and forest ecosystems.
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