Reexamination of Cupressaceae parasitic fungi based on nomenclature, type specimens and molecular phylogeny

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K07785
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Forest science
• Research Institution: Tokyo University of Agriculture
• Principal Investigator: MOTOHASHI Keiichi 東京農業大学, 国際食料情報学部, 教授 (10527542)
• Research Collaborator: HATTORI Yukako
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: 分類 / ヒノキ科 / Phyllosticta属菌 / 分子系統 / タイプ標本 / 命名規約 / 植物寄生菌類 / 病原性

Outline of Final Research Achievements

As a result of observing the disease specimens by genus of Phyllosticta of collected cypress trees and some type specimens in Japan, two known species, two species to be transferred to this genus, and three species which are newly produced in Japan were recognized.　Furthermore, molecular phylogenetic analysis, morphological characteristics, temperature characteristics and pathogenicity of Phyllosticta spp. isolated from 20 genera including Cupressaceae were identified as five monophyletic groups. Heretofore, two groups of Phyllosticta spp. have been known: pathogens that host plants are restricted and nonpathogenic endophytes which are polyphasic. For the first time in the genus of Phyllosticta from Cupressaceae, it is recognized that there is a pathogenic multispecific species different from the known species concept.

Free Research Field

分類学

Academic Significance and Societal Importance of the Research Achievements

ヒノキ科樹木に寄生するPhyllosticta属菌について、命名規約、タイプ標本および分子系統解析を行った結果、既知の2種の他、日本新産種3種を含む5種が認められ、我が国の菌類相が明らかとなった。さらに、Phyllosticta属菌には、宿主が限定される種のみならず複数の宿主に寄生することのできる種が存在することが明らかとなり、病害防除を行う上で重要となる感染経路について、新たな知見となった。