Yoshihito Ohmura - Academia.edu (original) (raw)
Papers by Yoshihito Ohmura
Novosti sistematiki nizših rastenij, 2022
Rinodina endospora and R. macrospora are reported as new to Japan. These species are known to be ... more Rinodina endospora and R. macrospora are reported as new to Japan. These species are known to be rare in Northeastern Asia and have a disjunctive distribution. Rinodina endospora was collected on bark of Alnus sp. and Salix sp. at 290 m a. s. l. in Hokkaido, and R. macrospora was on bark of Abies mariesii at elevation between 1960 and 2000 m a. s. l. in Toyama Prefecture of central Honshu. The paper provides data on morphology, ecology, differentiation and distribution of two Rinodina species.
Turczaninowia, 2019
Fuscidea submollis Mas. Inoue is reported for the first time from the Russian Far East. Distincti... more Fuscidea submollis Mas. Inoue is reported for the first time from the Russian Far East. Distinctive features of the taxon are discussed, and a comparison with known saxicolous Fuscidea V. Wirth & Vězda species with amyloid medulla is made. Three arctic-alpine species: Sporastatia testudinea (Ach.) A. Massal., Buellia concinna Th. Fr., Amygdalaria panaeola (Ach.) Hertel et Brodo, and Aspilidea myrinii (Fr.) Hafellner are recorded for the first time in the South Far East from the Sikhote Alin Range (Primorye Territory). Calvitimela aglaea (Sommerf.) Hafellner is reported for the first time from Sikhote Alin Range and Primorye Territory.
Longterm monitoring of Parmotrema tinctorum and qualitative changes of air pollution in Shimizu W... more Longterm monitoring of Parmotrema tinctorum and qualitative changes of air pollution in Shimizu Ward, Shizuoka City, Japan Yoshihito OHMURA 1, Masanobu KAWACHI 1, Kazuhiro OHTARA 2 and Keiichi SUGIYAMA 3 1 National Institute for Environmental Studies, 162 Onogawa, Tsukuba, Ibaraki 3058506, JAPAN 2 Shizuoka Institute of Environment and Hygiene, 4272 Kitaando, Shizuoka 4208637, JAPAN 3 Fuji Tokoha University, 325 Ohbuchi, Fuji, Shizuoka 4170801, JAPAN
Additional file 1: Table S1. The results of RNA-seq. Table S2 GO terms enriched (p-value
The Lichenologist, 2004
The taxonomic position of the Neuropogon group, as inferred from the morphology of representative... more The taxonomic position of the Neuropogon group, as inferred from the morphology of representative species of the group and ITS sequences from Usnea antarctica and U. sphacelata, is discussed. Morphological observations revealed that the Neuropogon group does not have annular-pseudocyphellae, which are characteristic of the subgenus Dolichousnea, or a fistulose axis, which is characteristic of the subgenus Eumitria. In addition, the hypothecium of Neuropogon is thin, and the iodine reaction in the axis is negative. These features are consistent with those of the subgenus Usnea. Within the subgenus Usnea, Neuropogon is morphologically distinct from sections Usnea and Ceratinae (i.e. having a sphacelata-type cortex, black pigmentation of the upper thallus and a dark brown apothecial disc). The molecular data suggest that U. antarctica and U. sphacelata are members of the subgenus Usnea and are less closely related to subgenera Dolichousnea and Eumitria. The morphological and molecular ...
The Lichenologist, 2013
The activity concentration of 131I, 134Cs and 137Cs radionuclides in lichens was traced one and a... more The activity concentration of 131I, 134Cs and 137Cs radionuclides in lichens was traced one and a half months after the Fukushima nuclear accident. The samples were collected in Tsukuba City, which is located c. 170 km south of the Fukushima Daiichi nuclear power plant (NPP). The activity concentrations differed depending on species and habitat. For example, the maximum activity concentration of 137Cs was 22596 Bq kg–1 dry weight in Physcia orientalis (collected from the trunk of Zelkova serrata on 30 June 2011), and 1928 Bq kg–1 in Hyperphyscia crocata (from the trunk of Quercus myrsinaefolia collected on 8 March 2012). The activity concentration of 137Cs in Dirinaria applanata and Phaeophyscia spinellosa growing on vertical habitats decreased by c. 50% within a year, indicating radionuclides might have been washed off by rain. The radionuclides were apparently derived from the Fukushima NPP accident because: 1) one specimen collected at the same place one year before the accident ...
PLOS ONE, 2021
We investigated the radiocaesium content of nine epiphytic foliose lichens species and the adjace... more We investigated the radiocaesium content of nine epiphytic foliose lichens species and the adjacent barks of Zelkova serrata (Ulmaceae, "Japanese elm") and Cerasus sp. (Rosaceae, "Cherry tree") at the boundary of the Fukushima Dai-ichi Nuclear Power Station six years after the accident in 2011. Caesium-137 activities per unit area (the 137Cs-inventory) were determined to compare radiocaesium retentions of lichens (65 specimens) and barks (44 specimens) under the same growth conditions. The 137Cs-inventory of lichens collected from Zelkova serrata and Cerasus sp. were respectively 7.9- and 3.8-times greater than the adjacent barks. Furthermore, we examined the radiocaesium distribution within these samples using autoradiography and on the surfaces with an electron probe micro analyzer (EPMA). Autoradiographic results showed strong local spotting and heterogeneous distributions of radioactivity in both the lichen and bark samples, although the intensities were lowe...
The Bryologist, 2006
The genetic combinations between mycobionts and photobionts in Parmotrema tinctorum collected fro... more The genetic combinations between mycobionts and photobionts in Parmotrema tinctorum collected from ca. 60 km 2 of the Shimizu district, of Shizuoka City in Japan was investigated based on ITS rDNA sequences. This lichen produces apothecia quite rarely, and in principle propagates vegetatively by isidia. The genetic diversity of the mycobiont comprised four types, while that of the photobiont comprised 21 types. There were 28 different combinations between mycobiont and photobiont. All the photobionts were identified as Trebouxia corticola (s. lat.), based on both molecular phylogenetic results and morphological observation of culture strains obtained in this study. Therefore, P. tinctorum is considered to be highly selective toward the photobiont. The 28 combinations from the small area represent an unexpectedly high diversity, because P. tinctorum is thought to propagate vegetatively. Four possible mechanisms to account the high genetic combinations are suggested: i.e., photobiont exchange, fusion of thalli, and long-distance dispersal of isidia or ascospores. The genetic diversity of photobionts was poor in the urban area, but rich in suburbs and mountainsides. This might be caused by a bottleneck or founder effect in the population recovering from former damage by heavy air pollution, or variable selectivity of P. tinctorum depending on the environments.
New localities and/or molecular data are provided for the following eight threatened species of l... more New localities and/or molecular data are provided for the following eight threatened species of lichens in Japan: Chiodecton congestulum, Flavopunctelia soredica, Icmadophila japon- ica, Lethariella togashii, Pseudocyphellaria argyracea, Thysanothecium scutellatum, Usnea fil- ipendula, and U. nipparensis. ITS rDNA sequences were successfully obtained from all species except for C. congestulum, and were compared with the known sequences retrieved from GenBank.
Opegrapha phaeophysciae is newly reported for Japan from Hokkaido and central Honshu, and a detai... more Opegrapha phaeophysciae is newly reported for Japan from Hokkaido and central Honshu, and a detailed description of the species is provided based on the Japanese collections. This species has previously been found on Phaeophyscia hispidula and was known only from Far East Russia. In Japan, O. phaeophysciae was found on the thallus of P. limbata, a species closely related to P. hispidula.
Usnea flavocardia is reported as new to Asia. It was collected from Taiwan where it grows on twig... more Usnea flavocardia is reported as new to Asia. It was collected from Taiwan where it grows on twig of Aquifoliaceae and bark of Tsuga sp. at elevation between 1900 and 3100 m. The description is given based on the Taiwanese specimens.
We performed an experiment involving transplantation of disks punched from Par- motrema tinctorum... more We performed an experiment involving transplantation of disks punched from Par- motrema tinctorum lobes at 3 sites with different air pollution levels in Shimizu Ward, Shizuoka City, Japan. Lobule formation was observed in the clean site, while disintegration of the cortex was observed in the polluted sites where NOx, NO2, SO2, and O3 levels were significantly higher. In ad- dition, the amounts of atranorin were lower in the polluted sites than in the clean site, and they were lowest in the site where O3 levels were the highest during summer. The difference between the amounts of lecanoric acid was not statistically significant among the test sites.
Lichens of Mikura-jima Island, Izu Islands, central Japan, were investigated. As the results of t... more Lichens of Mikura-jima Island, Izu Islands, central Japan, were investigated. As the results of taxonomic study, 78 taxa (77 species and 1 variety) were recognized from the island. Among them, Graphis mikuraensis Y. Ohmura & M. Nakan. is described as a new species. Lepraria finkii and L. lobificans, based on the emended species concept, were confirmed to occur in Japan. A new combination, Rhabdodiscus inalbescens (Nyl.) Frisch is proposed. Phytogeographic discussion is made for the listed species. The lichen flora of Mikura-jima Island is characterized by the high percentage of pantemperate element species together with tropical and subtropical species. A remarkable range extension is noted for Physma radians, and the find represents the northernmost locality for this pacific element species. Nipponoparmelia laevior, which was common before 1981, may have become extinct or drastically reduced in this island during the past 30 years.
New localities and/or molecular data are provided for the following eight threatened species of l... more New localities and/or molecular data are provided for the following eight threatened species of lichens in Japan: Chiodecton congestulum, Flavopunctelia soredica, Icmadophila japonica, Lethariella togashii, Pseudocyphellaria argyracea, Thysanothecium scutellatum, Usnea filipendula, and U. nipparensis. ITS rDNA sequences were successfully obtained from all species except for C. congestulum, and were compared with the known sequences retrieved from GenBank.
Six localities from Honshu in Japan and one from Primorye Territory in Far East of Russia are new... more Six localities from Honshu in Japan and one from Primorye Territory in Far East of Russia are newly added for the distribution of Ropalospora phaeoplaca. Although this species is known from main land of China, Taiwan, Korea and Far East of Russia, only the type locality was known in Japan before the present report. The ITS nrDNA region was sequenced from the fresh materials using in this study, and the maximum likelihood phylogenetic tree is also presented. The tree shows that the samples of R. phaeoplaca formed a monophyletic clade that is a sister to the clade of R. viridis, and they are sister to R. lugubris clade. Although R. chlorantha is considered to be closely related to R. phaeoplaca, the ITS nrDNA sequence could not be obtained in this study.
Novosti sistematiki nizših rastenij, 2022
Rinodina endospora and R. macrospora are reported as new to Japan. These species are known to be ... more Rinodina endospora and R. macrospora are reported as new to Japan. These species are known to be rare in Northeastern Asia and have a disjunctive distribution. Rinodina endospora was collected on bark of Alnus sp. and Salix sp. at 290 m a. s. l. in Hokkaido, and R. macrospora was on bark of Abies mariesii at elevation between 1960 and 2000 m a. s. l. in Toyama Prefecture of central Honshu. The paper provides data on morphology, ecology, differentiation and distribution of two Rinodina species.
Turczaninowia, 2019
Fuscidea submollis Mas. Inoue is reported for the first time from the Russian Far East. Distincti... more Fuscidea submollis Mas. Inoue is reported for the first time from the Russian Far East. Distinctive features of the taxon are discussed, and a comparison with known saxicolous Fuscidea V. Wirth & Vězda species with amyloid medulla is made. Three arctic-alpine species: Sporastatia testudinea (Ach.) A. Massal., Buellia concinna Th. Fr., Amygdalaria panaeola (Ach.) Hertel et Brodo, and Aspilidea myrinii (Fr.) Hafellner are recorded for the first time in the South Far East from the Sikhote Alin Range (Primorye Territory). Calvitimela aglaea (Sommerf.) Hafellner is reported for the first time from Sikhote Alin Range and Primorye Territory.
Longterm monitoring of Parmotrema tinctorum and qualitative changes of air pollution in Shimizu W... more Longterm monitoring of Parmotrema tinctorum and qualitative changes of air pollution in Shimizu Ward, Shizuoka City, Japan Yoshihito OHMURA 1, Masanobu KAWACHI 1, Kazuhiro OHTARA 2 and Keiichi SUGIYAMA 3 1 National Institute for Environmental Studies, 162 Onogawa, Tsukuba, Ibaraki 3058506, JAPAN 2 Shizuoka Institute of Environment and Hygiene, 4272 Kitaando, Shizuoka 4208637, JAPAN 3 Fuji Tokoha University, 325 Ohbuchi, Fuji, Shizuoka 4170801, JAPAN
Additional file 1: Table S1. The results of RNA-seq. Table S2 GO terms enriched (p-value
The Lichenologist, 2004
The taxonomic position of the Neuropogon group, as inferred from the morphology of representative... more The taxonomic position of the Neuropogon group, as inferred from the morphology of representative species of the group and ITS sequences from Usnea antarctica and U. sphacelata, is discussed. Morphological observations revealed that the Neuropogon group does not have annular-pseudocyphellae, which are characteristic of the subgenus Dolichousnea, or a fistulose axis, which is characteristic of the subgenus Eumitria. In addition, the hypothecium of Neuropogon is thin, and the iodine reaction in the axis is negative. These features are consistent with those of the subgenus Usnea. Within the subgenus Usnea, Neuropogon is morphologically distinct from sections Usnea and Ceratinae (i.e. having a sphacelata-type cortex, black pigmentation of the upper thallus and a dark brown apothecial disc). The molecular data suggest that U. antarctica and U. sphacelata are members of the subgenus Usnea and are less closely related to subgenera Dolichousnea and Eumitria. The morphological and molecular ...
The Lichenologist, 2013
The activity concentration of 131I, 134Cs and 137Cs radionuclides in lichens was traced one and a... more The activity concentration of 131I, 134Cs and 137Cs radionuclides in lichens was traced one and a half months after the Fukushima nuclear accident. The samples were collected in Tsukuba City, which is located c. 170 km south of the Fukushima Daiichi nuclear power plant (NPP). The activity concentrations differed depending on species and habitat. For example, the maximum activity concentration of 137Cs was 22596 Bq kg–1 dry weight in Physcia orientalis (collected from the trunk of Zelkova serrata on 30 June 2011), and 1928 Bq kg–1 in Hyperphyscia crocata (from the trunk of Quercus myrsinaefolia collected on 8 March 2012). The activity concentration of 137Cs in Dirinaria applanata and Phaeophyscia spinellosa growing on vertical habitats decreased by c. 50% within a year, indicating radionuclides might have been washed off by rain. The radionuclides were apparently derived from the Fukushima NPP accident because: 1) one specimen collected at the same place one year before the accident ...
PLOS ONE, 2021
We investigated the radiocaesium content of nine epiphytic foliose lichens species and the adjace... more We investigated the radiocaesium content of nine epiphytic foliose lichens species and the adjacent barks of Zelkova serrata (Ulmaceae, "Japanese elm") and Cerasus sp. (Rosaceae, "Cherry tree") at the boundary of the Fukushima Dai-ichi Nuclear Power Station six years after the accident in 2011. Caesium-137 activities per unit area (the 137Cs-inventory) were determined to compare radiocaesium retentions of lichens (65 specimens) and barks (44 specimens) under the same growth conditions. The 137Cs-inventory of lichens collected from Zelkova serrata and Cerasus sp. were respectively 7.9- and 3.8-times greater than the adjacent barks. Furthermore, we examined the radiocaesium distribution within these samples using autoradiography and on the surfaces with an electron probe micro analyzer (EPMA). Autoradiographic results showed strong local spotting and heterogeneous distributions of radioactivity in both the lichen and bark samples, although the intensities were lowe...
The Bryologist, 2006
The genetic combinations between mycobionts and photobionts in Parmotrema tinctorum collected fro... more The genetic combinations between mycobionts and photobionts in Parmotrema tinctorum collected from ca. 60 km 2 of the Shimizu district, of Shizuoka City in Japan was investigated based on ITS rDNA sequences. This lichen produces apothecia quite rarely, and in principle propagates vegetatively by isidia. The genetic diversity of the mycobiont comprised four types, while that of the photobiont comprised 21 types. There were 28 different combinations between mycobiont and photobiont. All the photobionts were identified as Trebouxia corticola (s. lat.), based on both molecular phylogenetic results and morphological observation of culture strains obtained in this study. Therefore, P. tinctorum is considered to be highly selective toward the photobiont. The 28 combinations from the small area represent an unexpectedly high diversity, because P. tinctorum is thought to propagate vegetatively. Four possible mechanisms to account the high genetic combinations are suggested: i.e., photobiont exchange, fusion of thalli, and long-distance dispersal of isidia or ascospores. The genetic diversity of photobionts was poor in the urban area, but rich in suburbs and mountainsides. This might be caused by a bottleneck or founder effect in the population recovering from former damage by heavy air pollution, or variable selectivity of P. tinctorum depending on the environments.
New localities and/or molecular data are provided for the following eight threatened species of l... more New localities and/or molecular data are provided for the following eight threatened species of lichens in Japan: Chiodecton congestulum, Flavopunctelia soredica, Icmadophila japon- ica, Lethariella togashii, Pseudocyphellaria argyracea, Thysanothecium scutellatum, Usnea fil- ipendula, and U. nipparensis. ITS rDNA sequences were successfully obtained from all species except for C. congestulum, and were compared with the known sequences retrieved from GenBank.
Opegrapha phaeophysciae is newly reported for Japan from Hokkaido and central Honshu, and a detai... more Opegrapha phaeophysciae is newly reported for Japan from Hokkaido and central Honshu, and a detailed description of the species is provided based on the Japanese collections. This species has previously been found on Phaeophyscia hispidula and was known only from Far East Russia. In Japan, O. phaeophysciae was found on the thallus of P. limbata, a species closely related to P. hispidula.
Usnea flavocardia is reported as new to Asia. It was collected from Taiwan where it grows on twig... more Usnea flavocardia is reported as new to Asia. It was collected from Taiwan where it grows on twig of Aquifoliaceae and bark of Tsuga sp. at elevation between 1900 and 3100 m. The description is given based on the Taiwanese specimens.
We performed an experiment involving transplantation of disks punched from Par- motrema tinctorum... more We performed an experiment involving transplantation of disks punched from Par- motrema tinctorum lobes at 3 sites with different air pollution levels in Shimizu Ward, Shizuoka City, Japan. Lobule formation was observed in the clean site, while disintegration of the cortex was observed in the polluted sites where NOx, NO2, SO2, and O3 levels were significantly higher. In ad- dition, the amounts of atranorin were lower in the polluted sites than in the clean site, and they were lowest in the site where O3 levels were the highest during summer. The difference between the amounts of lecanoric acid was not statistically significant among the test sites.
Lichens of Mikura-jima Island, Izu Islands, central Japan, were investigated. As the results of t... more Lichens of Mikura-jima Island, Izu Islands, central Japan, were investigated. As the results of taxonomic study, 78 taxa (77 species and 1 variety) were recognized from the island. Among them, Graphis mikuraensis Y. Ohmura & M. Nakan. is described as a new species. Lepraria finkii and L. lobificans, based on the emended species concept, were confirmed to occur in Japan. A new combination, Rhabdodiscus inalbescens (Nyl.) Frisch is proposed. Phytogeographic discussion is made for the listed species. The lichen flora of Mikura-jima Island is characterized by the high percentage of pantemperate element species together with tropical and subtropical species. A remarkable range extension is noted for Physma radians, and the find represents the northernmost locality for this pacific element species. Nipponoparmelia laevior, which was common before 1981, may have become extinct or drastically reduced in this island during the past 30 years.
New localities and/or molecular data are provided for the following eight threatened species of l... more New localities and/or molecular data are provided for the following eight threatened species of lichens in Japan: Chiodecton congestulum, Flavopunctelia soredica, Icmadophila japonica, Lethariella togashii, Pseudocyphellaria argyracea, Thysanothecium scutellatum, Usnea filipendula, and U. nipparensis. ITS rDNA sequences were successfully obtained from all species except for C. congestulum, and were compared with the known sequences retrieved from GenBank.
Six localities from Honshu in Japan and one from Primorye Territory in Far East of Russia are new... more Six localities from Honshu in Japan and one from Primorye Territory in Far East of Russia are newly added for the distribution of Ropalospora phaeoplaca. Although this species is known from main land of China, Taiwan, Korea and Far East of Russia, only the type locality was known in Japan before the present report. The ITS nrDNA region was sequenced from the fresh materials using in this study, and the maximum likelihood phylogenetic tree is also presented. The tree shows that the samples of R. phaeoplaca formed a monophyletic clade that is a sister to the clade of R. viridis, and they are sister to R. lugubris clade. Although R. chlorantha is considered to be closely related to R. phaeoplaca, the ITS nrDNA sequence could not be obtained in this study.