A5044583895- Plant Pathogens and Fungal Diseases
- Forest Insect Ecology and Management
- Mycorrhizal Fungi and Plant Interactions
- Plant and animal studies
- Yeasts and Rust Fungi Studies
- Horticultural and Viticultural Research
- Forest Ecology and Biodiversity Studies
- Species Distribution and Climate Change
- Nematode management and characterization studies
- Plant Physiology and Cultivation Studies
- Ecology and Vegetation Dynamics Studies
- Bioactive Natural Diterpenoids Research
- Flowering Plant Growth and Cultivation
- Plant Parasitism and Resistance
- Plant and Fungal Interactions Research
- Plant Disease Resistance and Genetics
- Marine Biology and Ecology Research
- Berry genetics and cultivation research
- Legume Nitrogen Fixing Symbiosis
Forestry and Forest Products Research Institute
2019-2024
The University of Tokyo
1976-2021
Mie University
2010-2017
Exotic diseases and pests of trees have caused continental-scale disturbances in forest ecosystems industries, their invasions are considered largely unpredictable. We tested the concept preinvasion assessment not yet invasive organisms, which enables empirical risk potential invasion impact. Our example assesses fungi associated with Old World bark ambrosia beetles to impact North American trees. selected 55 Asian European scolytine beetle species using host use, economic, regulatory...
In Korea, mass mortality of Quercus mongolica trees has become obvious since 2004. Raffaelea quercus-mongolicae is believed to be a causal fungus contributing the mortality. To evaluate pathogenicity trees, was multiple- and single-inoculated seedlings twigs mature respectively. both inoculations, reisolated from more than 50% inoculated seedlings. single proportions transverse area non-conductive sapwood at inoculation points vertical lengths discoloration expanded were significantly...
The species diversity and abundance of soil nematodes can be an indicator reflecting environmental changes in a given ecosystem. As rather simple type forest ecosystem, coastal pine forests make good model system for characterizing nematode communities. purpose this study was to determine the heterogeneity community structure Japanese black (Pinus thunbergii) forest. We examined from sandy soils over one year divided them into trophic groups based on morphological traits. (per g dry soil)...
Summary Mass mortality of Fagacean tree species caused by Raffaelea quercivora has occurred widely in Japan. Because conidia or other propagules the pathogen have not been found infected trees, spread is assumed to occur primarily hyphae. To clarify relationship between hyphal growth within trees and their vessel arrangements, we examined two native Japanese oaks, Quercus crispula glauca , three exotic American coccinea palustris rubra . a radial‐porous species, whereas four ring‐porous wood...
To compare the distributions of Raffaelea quercivora hyphae within seedlings a susceptible species, Quercus crispula, and resistant Q. glauca, we examined water conductance at transverse sections. was inoculated into stems in July (summer) October (autumn) observed by light fluorescence microscopy 1 2 weeks after inoculation. The hyphal distribution patterns expressed as Iδ index differed between species each occasion. growth wider crispula than glauca inoculation, but did not differ...
Summary Mass mortality of fagaceous trees caused by Japanese oak wilt has occurred widely in Japan. Although virulence the causal fungus, Raffaelea quercivora , appeared to differ among isolates, its relation fungal growth within was unknown. To clarify differences against susceptible Quercus crispula we examined four R. isolates and resulting virulence. In our study, were multiple‐inoculated seedlings single‐inoculated twigs mature trees. multiple‐inoculation test, rates observation...
Paulownia tree canker is a major disease of Paulowniae tomentosa in Japan. The pathogen was described as Valsa paulowniae 1916 by Hemmi and Miyabe. However, its current taxonomic status phylogenetic position are uncertain. In this study, we reviewed the protologue species rediscovered syntypes maintained at Hokkaido University Museum (SAPA). From these specimens, lectotype selected. molecular examined with newly collected samples. Based on result phylogeny morphology, an epitype designated...
ISHS XXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010): Symposium Berries: From Genomics to Sustainable Production, Quality Health MANIPULATION OF CROPPING TIME BY CONTROLLING TIMING CANE ELONGATION IN PRIMOCANE-FRUITING RED RASPBERRY 'HERITAGE' JAPAN
In Japan, no association between the ambrosia beetle and their fungal symbionts causing branch dieback or tree mortality on maple, Acer amoenum, has been reported. However, we identified of several branches numerous holes created by three species beetles, Euwallacea fornicatus, interjectus, Platypus calamus, amoenum trees at University Tokyo Tanashi Forest, Metropolis, in 2016. The high attack density beetles was observed weakened trees; however, contribution associated fungi to still...
Summary Japanese oak wilt causes widespread mortality in Japan. Possible differences susceptibility to the causal fungus, Raffaelea quercivora , may be due vessel arrangements host trees. To clarify whether constitutive defence mechanisms including or induced are main determinants of susceptibility, we inoculated fungus into living seedlings sterilized stem segments four fagaceous species. In seedlings, water conductance was assessed with dye. both and segments, hyphal growth examined by...
Two morphologically similar fungi, Fomitiporia torreyae and punctata, are causal fungi of various tree diseases in Japan speculated to be distributed different climatic zones. Clarifying their distribution ranges preferences would contribute the prediction disease occurrences consideration controls. In this study, we predicted present geographical distributions F. punctata using a Maxent species model analyze our data previously published collection records. addition, examined importance...
Trunk rot caused by the wood decay fungus Fomitiporia torreyae is a serious disease of Japanese cedar. The characterized white sap with brown zone lines and vertical depressions on trunk. During our field investigations this disease, we found another cedar, lines, or without less obvious results phylogenetic analysis most frequently isolated from diseased trees morphological observation basidiocarps previously identified as Fomitiporella umbrinella showed that both represented sinica. Our...
Abstract The pathogenic fungus Raffaelea quercivora kills members of the Fagaceae throughout Japan. Although amount host damage caused by different strains pathogen varies, degree this variation and underlying factors have not been thoroughly examined. We used 40 R . isolates collected across Japan from oak other species evaluated their virulence in stem Konara ( Quercus serrata ), compared hyphal growth living gamma‐irradiated Japanese crispula ) twigs activity carbohydrate‐degrading...