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Kazuyoshi Futai - One of the best experts on this subject based on the ideXlab platform.
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distribution of bacterial species in soil with a vegetational change from japanese black pine pinus thunbergii to black locust Robinia pseudoacacia
Microbes and Environments, 2009Co-Authors: Takeshi Taniguchi, Ryota Kataoka, Shigenobu Tamai, Norikazu Yamanaka, Kazuyoshi FutaiAbstract:The effects of a nitrogen-fixing tree, black locust (Robinia pseudoacacia), on the distribution of bacterial species were examined in a Japanese black pine (Pinus thunbergii) and black locust-dominated area. DNA was extracted from the soil at depths of 0-5 and 5-10 cm, collected at the border between a Japanese black pine-dominated forest and a black locust-dominated forest, and the distribution of bacterial species was investigated by denaturing gradient gel electrophoresis (DGGE). The bacterial communities did not differ between the two forests. The distribution of some bacterial species correlated significantly with soil pH, soil carbon [C], soil nitrogen [N], and soil N/phosphate [P], but not with soil C/N or soil P. The distributional relationships between ectomycorrhizal (ECM) fungal species and bacterial species were also analyzed. A positive correlation was observed between the distribution of some ECM fungi and bacterial species. These bacteria may have some interactions with ECM fungi in the field.
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inhibition of the regeneration of japanese black pine pinus thunbergii by black locust Robinia pseudoacacia in coastal sand dunes
Journal of Forest Research, 2007Co-Authors: Takeshi Taniguchi, Shigenobu Tamai, Norikazu Yamanaka, Kazuyoshi FutaiAbstract:Pine forests are declining because of pine wilt disease and Robinia pseudoacacia, a nitrogen-fixing species, is dominating coastal forests along the Sea of Japan. We examined the effects of R. pseudoacacia on the regeneration of a native pine species, Pinus thunbergii. Two 200 m2 plots were set up at the border of a P. thunbergii and R. pseudoacacia-dominated area in a coastal forest. We conducted monthly censuses of emergence, distribution and survival of pine seedlings in the plots from May 2003 to December 2004. Light intensity and soil properties were also measured to analyze the relationships between the survival of pine seedlings and environmental conditions using the Mantel test and the structural equation model. Pinus thunbergii seedlings emerged in spring–early summer and in late autumn. Survival of pine seedlings in the R. pseudoacacia-dominated subplots was less than half that in the pine-dominated subplots. Survival of pine seedlings emerging in May 2003 was significantly reduced by the lower light intensity and higher soil nitrogen in R. pseudoacacia-dominated subplots. The tendency was the same for seedlings emerging from April to May 2004. We concluded that R. pseudoacacia reduced the intensity of light during the growing season and increased the nitrogen content of soil, which resulted in inhibition of the natural regeneration of P. thunbergii.
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does ectomycorrhizal fungal community structure vary along a japanese black pine pinus thunbergii to black locust Robinia pseudoacacia gradient
New Phytologist, 2007Co-Authors: Takeshi Taniguchi, Shigenobu Tamai, Norikazu Yamanaka, Natsumi Kanzaki, Kazuyoshi FutaiAbstract:Summary • In this study we examined the role of the nitrogen-fixing tree, Robinia pseudoacacia (black locust), in ectomycorrhizal (ECM) formation and ECM community of Pinus thunbergii (Japanese black pine) seedlings. • Two 200 m2 experimental plots were established at the border between a Japanese black pine- and a black locust-dominated area in a coastal forest. The ECM fungal community of pine seedlings was examined by PCR-RFLP and sequence analysis. We analyzed the relationship between ECM formation, ECM community, growth, and nutrient status of pine seedlings and environmental conditions using the Mantel test and structural equation model. • Percentages of ECM root tips, the number of ECM fungal species and ECM diversity on pine seedlings decreased in the black locust-dominated area. Cenococcum geophilum and Russula spp. were dominant in the Japanese black pine-dominated area, whereas Tomentella spp. were dominant in the black locust-dominated area. Nitrogen (N) concentration in soils or pine seedlings strongly influenced the percentage of ECM root tips, the number of ECM fungal species and ECM fungal similarity. • These results imply the long-term eutrophication caused by N-fixing trees can change ECM formation and ECM community structure.
Takeshi Taniguchi - One of the best experts on this subject based on the ideXlab platform.
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gas exchange by the mesic origin arid land plantation species Robinia pseudoacacia under annual summer reduction in plant hydraulic conductance
Tree Physiology, 2018Co-Authors: Yoshiyuki Miyazawa, Takeshi Taniguchi, Norikazu Yamanaka, Tomoomi KumagaiAbstract:The mesic-origin plantation species Robinia pseudoacacia L. has been successfully grown in many arid land plantations around the world but often exhibits dieback and reduced growth due to drought. Therefore, to explore the behavior of this species under changing environmental conditions, we examined the relationship between ecophysiological traits, gas exchange and plant hydraulics over a 3-year period in trees that experienced reduced plant hydraulic conductance (Gp) in summer. We found that the transpiration rate, stomatal conductance (Gs) and minimum leaf water potential (Ψlmin) decreased in early summer in response to a decrease in Gp, and that Gp did not recover until the expansion of new leaves in spring. However, we did not observe any changes in the leaf area index or other ecophysiological traits at the leaf level in response to this reduction in Gp. Furthermore, model simulations based on measured data revealed that the canopy-scale photosynthetic rate (Ac) was 15-25% higher than the simulated Ac when it was assumed that Ψlmin remained constant after spring but almost the same as the simulated Ac when it was assumed that Gp remained high even after spring. These findings indicate that R. pseudoacacia was frequently exposed to a reduced Gp at the study site but offset its effects on Ac by plastically lowering Ψlmin to avoid experiencing any further reduction in Gp or Gs.
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distribution of bacterial species in soil with a vegetational change from japanese black pine pinus thunbergii to black locust Robinia pseudoacacia
Microbes and Environments, 2009Co-Authors: Takeshi Taniguchi, Ryota Kataoka, Shigenobu Tamai, Norikazu Yamanaka, Kazuyoshi FutaiAbstract:The effects of a nitrogen-fixing tree, black locust (Robinia pseudoacacia), on the distribution of bacterial species were examined in a Japanese black pine (Pinus thunbergii) and black locust-dominated area. DNA was extracted from the soil at depths of 0-5 and 5-10 cm, collected at the border between a Japanese black pine-dominated forest and a black locust-dominated forest, and the distribution of bacterial species was investigated by denaturing gradient gel electrophoresis (DGGE). The bacterial communities did not differ between the two forests. The distribution of some bacterial species correlated significantly with soil pH, soil carbon [C], soil nitrogen [N], and soil N/phosphate [P], but not with soil C/N or soil P. The distributional relationships between ectomycorrhizal (ECM) fungal species and bacterial species were also analyzed. A positive correlation was observed between the distribution of some ECM fungi and bacterial species. These bacteria may have some interactions with ECM fungi in the field.
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inhibition of the regeneration of japanese black pine pinus thunbergii by black locust Robinia pseudoacacia in coastal sand dunes
Journal of Forest Research, 2007Co-Authors: Takeshi Taniguchi, Shigenobu Tamai, Norikazu Yamanaka, Kazuyoshi FutaiAbstract:Pine forests are declining because of pine wilt disease and Robinia pseudoacacia, a nitrogen-fixing species, is dominating coastal forests along the Sea of Japan. We examined the effects of R. pseudoacacia on the regeneration of a native pine species, Pinus thunbergii. Two 200 m2 plots were set up at the border of a P. thunbergii and R. pseudoacacia-dominated area in a coastal forest. We conducted monthly censuses of emergence, distribution and survival of pine seedlings in the plots from May 2003 to December 2004. Light intensity and soil properties were also measured to analyze the relationships between the survival of pine seedlings and environmental conditions using the Mantel test and the structural equation model. Pinus thunbergii seedlings emerged in spring–early summer and in late autumn. Survival of pine seedlings in the R. pseudoacacia-dominated subplots was less than half that in the pine-dominated subplots. Survival of pine seedlings emerging in May 2003 was significantly reduced by the lower light intensity and higher soil nitrogen in R. pseudoacacia-dominated subplots. The tendency was the same for seedlings emerging from April to May 2004. We concluded that R. pseudoacacia reduced the intensity of light during the growing season and increased the nitrogen content of soil, which resulted in inhibition of the natural regeneration of P. thunbergii.
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does ectomycorrhizal fungal community structure vary along a japanese black pine pinus thunbergii to black locust Robinia pseudoacacia gradient
New Phytologist, 2007Co-Authors: Takeshi Taniguchi, Shigenobu Tamai, Norikazu Yamanaka, Natsumi Kanzaki, Kazuyoshi FutaiAbstract:Summary • In this study we examined the role of the nitrogen-fixing tree, Robinia pseudoacacia (black locust), in ectomycorrhizal (ECM) formation and ECM community of Pinus thunbergii (Japanese black pine) seedlings. • Two 200 m2 experimental plots were established at the border between a Japanese black pine- and a black locust-dominated area in a coastal forest. The ECM fungal community of pine seedlings was examined by PCR-RFLP and sequence analysis. We analyzed the relationship between ECM formation, ECM community, growth, and nutrient status of pine seedlings and environmental conditions using the Mantel test and structural equation model. • Percentages of ECM root tips, the number of ECM fungal species and ECM diversity on pine seedlings decreased in the black locust-dominated area. Cenococcum geophilum and Russula spp. were dominant in the Japanese black pine-dominated area, whereas Tomentella spp. were dominant in the black locust-dominated area. Nitrogen (N) concentration in soils or pine seedlings strongly influenced the percentage of ECM root tips, the number of ECM fungal species and ECM fungal similarity. • These results imply the long-term eutrophication caused by N-fixing trees can change ECM formation and ECM community structure.
Norikazu Yamanaka - One of the best experts on this subject based on the ideXlab platform.
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gas exchange by the mesic origin arid land plantation species Robinia pseudoacacia under annual summer reduction in plant hydraulic conductance
Tree Physiology, 2018Co-Authors: Yoshiyuki Miyazawa, Takeshi Taniguchi, Norikazu Yamanaka, Tomoomi KumagaiAbstract:The mesic-origin plantation species Robinia pseudoacacia L. has been successfully grown in many arid land plantations around the world but often exhibits dieback and reduced growth due to drought. Therefore, to explore the behavior of this species under changing environmental conditions, we examined the relationship between ecophysiological traits, gas exchange and plant hydraulics over a 3-year period in trees that experienced reduced plant hydraulic conductance (Gp) in summer. We found that the transpiration rate, stomatal conductance (Gs) and minimum leaf water potential (Ψlmin) decreased in early summer in response to a decrease in Gp, and that Gp did not recover until the expansion of new leaves in spring. However, we did not observe any changes in the leaf area index or other ecophysiological traits at the leaf level in response to this reduction in Gp. Furthermore, model simulations based on measured data revealed that the canopy-scale photosynthetic rate (Ac) was 15-25% higher than the simulated Ac when it was assumed that Ψlmin remained constant after spring but almost the same as the simulated Ac when it was assumed that Gp remained high even after spring. These findings indicate that R. pseudoacacia was frequently exposed to a reduced Gp at the study site but offset its effects on Ac by plastically lowering Ψlmin to avoid experiencing any further reduction in Gp or Gs.
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distribution of bacterial species in soil with a vegetational change from japanese black pine pinus thunbergii to black locust Robinia pseudoacacia
Microbes and Environments, 2009Co-Authors: Takeshi Taniguchi, Ryota Kataoka, Shigenobu Tamai, Norikazu Yamanaka, Kazuyoshi FutaiAbstract:The effects of a nitrogen-fixing tree, black locust (Robinia pseudoacacia), on the distribution of bacterial species were examined in a Japanese black pine (Pinus thunbergii) and black locust-dominated area. DNA was extracted from the soil at depths of 0-5 and 5-10 cm, collected at the border between a Japanese black pine-dominated forest and a black locust-dominated forest, and the distribution of bacterial species was investigated by denaturing gradient gel electrophoresis (DGGE). The bacterial communities did not differ between the two forests. The distribution of some bacterial species correlated significantly with soil pH, soil carbon [C], soil nitrogen [N], and soil N/phosphate [P], but not with soil C/N or soil P. The distributional relationships between ectomycorrhizal (ECM) fungal species and bacterial species were also analyzed. A positive correlation was observed between the distribution of some ECM fungi and bacterial species. These bacteria may have some interactions with ECM fungi in the field.
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inhibition of the regeneration of japanese black pine pinus thunbergii by black locust Robinia pseudoacacia in coastal sand dunes
Journal of Forest Research, 2007Co-Authors: Takeshi Taniguchi, Shigenobu Tamai, Norikazu Yamanaka, Kazuyoshi FutaiAbstract:Pine forests are declining because of pine wilt disease and Robinia pseudoacacia, a nitrogen-fixing species, is dominating coastal forests along the Sea of Japan. We examined the effects of R. pseudoacacia on the regeneration of a native pine species, Pinus thunbergii. Two 200 m2 plots were set up at the border of a P. thunbergii and R. pseudoacacia-dominated area in a coastal forest. We conducted monthly censuses of emergence, distribution and survival of pine seedlings in the plots from May 2003 to December 2004. Light intensity and soil properties were also measured to analyze the relationships between the survival of pine seedlings and environmental conditions using the Mantel test and the structural equation model. Pinus thunbergii seedlings emerged in spring–early summer and in late autumn. Survival of pine seedlings in the R. pseudoacacia-dominated subplots was less than half that in the pine-dominated subplots. Survival of pine seedlings emerging in May 2003 was significantly reduced by the lower light intensity and higher soil nitrogen in R. pseudoacacia-dominated subplots. The tendency was the same for seedlings emerging from April to May 2004. We concluded that R. pseudoacacia reduced the intensity of light during the growing season and increased the nitrogen content of soil, which resulted in inhibition of the natural regeneration of P. thunbergii.
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does ectomycorrhizal fungal community structure vary along a japanese black pine pinus thunbergii to black locust Robinia pseudoacacia gradient
New Phytologist, 2007Co-Authors: Takeshi Taniguchi, Shigenobu Tamai, Norikazu Yamanaka, Natsumi Kanzaki, Kazuyoshi FutaiAbstract:Summary • In this study we examined the role of the nitrogen-fixing tree, Robinia pseudoacacia (black locust), in ectomycorrhizal (ECM) formation and ECM community of Pinus thunbergii (Japanese black pine) seedlings. • Two 200 m2 experimental plots were established at the border between a Japanese black pine- and a black locust-dominated area in a coastal forest. The ECM fungal community of pine seedlings was examined by PCR-RFLP and sequence analysis. We analyzed the relationship between ECM formation, ECM community, growth, and nutrient status of pine seedlings and environmental conditions using the Mantel test and structural equation model. • Percentages of ECM root tips, the number of ECM fungal species and ECM diversity on pine seedlings decreased in the black locust-dominated area. Cenococcum geophilum and Russula spp. were dominant in the Japanese black pine-dominated area, whereas Tomentella spp. were dominant in the black locust-dominated area. Nitrogen (N) concentration in soils or pine seedlings strongly influenced the percentage of ECM root tips, the number of ECM fungal species and ECM fungal similarity. • These results imply the long-term eutrophication caused by N-fixing trees can change ECM formation and ECM community structure.
Ming Tang - One of the best experts on this subject based on the ideXlab platform.
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effects of rhizophagus irregularis on photosynthesis and antioxidative enzymatic system in Robinia pseudoacacia l under drought stress
Frontiers in Plant Science, 2017Co-Authors: Min Sheng, Ming TangAbstract:Black locust (Robinia pseudoacacia L.) is an important legume tree species that is widely used for revegetation in the arid and semi-arid areas of China, where it frequently encounters drought stress. This study investigated how the presence of AM fungi affected the photosynthesis and antioxidant gene-enzymes response of black locust seedlings to drought stress. Here, pot experiments were performed to investigate the effects of Rhizophagus irregularis (synonym for Glomus intraradices), an AM fungus, on the tissue water content, photosynthesis, reactive oxygen species (ROS) production, antioxidant enzyme activity and gene expression in black locust (Robinia pseudoacacia L.) seedlings which were subjected to well watered or moderate drought stress. Mycorrhizal symbiosis increased relative water content of plant roots and leaves, promoted the accumulation of biomass and chlorophyll (Chl) content, and improved photochemistry efficiency, regardless of watering regimes. Mycorrhizal plants had higher SOD, POD, CAT, APX, and GR activities, and the transcript levels of Cu/Zn-SOD, APX and GR, but lower O2, H2O2 and MDA concentrations in leaves and roots of black locust under drought and well watered conditions. Results from the present study indicate that AM fungus (R. irregularis) symbiosis can enhance photosynthesis and ROS scavenging capabilities and increase relative water content of leaves and roots to alleviate drought stress in black locust. Further research is needed to elucidate the relations among AM fungi and the metabolic pathways of antioxidant enzymes, and the function of antioxidant genes regulated by mycorrhizal symbiosis with the purpose of revealing the mechanisms of mycorrhiza-induced plant tolerance to drought stress.
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Aquaporin gene expression and physiological responses of Robinia pseudoacacia L. to the mycorrhizal fungus Rhizophagus irregularis and drought stress.
Mycorrhiza, 2015Co-Authors: Haoqiang Zhang, Ming TangAbstract:The influence of arbuscular mycorrhiza (AM) and drought stress on aquaporin (AQP) gene expression, water status, and photosynthesis was investigated in black locust (Robinia pseudoacacia L.). Seedlings were grown in potted soil inoculated without or with the AM fungus Rhizophagus irregularis, under well-watered and drought stress conditions. Six full-length AQP complementary DNAs (cDNAs) were isolated from Robinia pseudoacacia, named RpTIP1;1, RpTIP1;3, RpTIP2;1, RpPIP1;1, RpPIP1;3, and RpPIP2;1. A phylogenetic analysis of deduced amino acid sequences demonstrated that putative proteins coded by these RpAQP genes belong to the water channel protein family. Expression analysis revealed higher RpPIP expression in roots while RpTIP expression was higher in leaves, except for RpTIP1;3. AM symbiosis regulated host plant AQPs, and the expression of RpAQP genes in mycorrhizal plants depended on soil water condition and plant tissue. Positive effects were observed for plant physiological parameters in AM plants, which had higher dry mass and lower water saturation deficit and electrolyte leakage than non-AM plants. Rhizophagus irregularis inoculation also slightly increased leaf net photosynthetic rate and stomatal conductance under well-watered and drought stress conditions. These findings suggest that AM symbiosis can enhance the drought tolerance in Robinia pseudoacacia plants by regulating the expression of RpAQP genes, and by improving plant biomass, tissue water status, and leaf photosynthesis in host seedlings.
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Symbiosis of Arbuscular Mycorrhizal Fungi and Robinia pseudoacacia L. Improves Root Tensile Strength and Soil Aggregate Stability.
Public Library of Science (PLoS), 2024Co-Authors: Haoqiang Zhang, Zhenkun Liu, Hui Chen, Ming TangAbstract:Robinia pseudoacacia L. (black locust) is a widely planted tree species on Loess Plateau for revegetation. Due to its symbiosis forming capability with arbuscular mycorrhizal (AM) fungi, we explored the influence of arbuscular mycorrhizal fungi on plant biomass, root morphology, root tensile strength and soil aggregate stability in a pot experiment. We inoculated R. pseudoacacia with/without AM fungus (Rhizophagus irregularis or Glomus versiforme), and measured root colonization, plant growth, root morphological characters, root tensile force and tensile strength, and parameters for soil aggregate stability at twelve weeks after inoculation. AM fungi colonized more than 70% plant root, significantly improved plant growth. Meanwhile, AM fungi elevated root morphological parameters, root tensile force, root tensile strength, Glomalin-related soil protein (GRSP) content in soil, and parameters for soil aggregate stability such as water stable aggregate (WSA), mean weight diameter (MWD) and geometric mean diameter (GMD). Root length was highly correlated with WSA, MWD and GMD, while hyphae length was highly correlated with GRSP content. The improved R. pseudoacacia growth, root tensile strength and soil aggregate stability indicated that AM fungi could accelerate soil fixation and stabilization with R. pseudoacacia, and its function in revegetation on Loess Plateau deserves more attention
Shigenobu Tamai - One of the best experts on this subject based on the ideXlab platform.
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distribution of bacterial species in soil with a vegetational change from japanese black pine pinus thunbergii to black locust Robinia pseudoacacia
Microbes and Environments, 2009Co-Authors: Takeshi Taniguchi, Ryota Kataoka, Shigenobu Tamai, Norikazu Yamanaka, Kazuyoshi FutaiAbstract:The effects of a nitrogen-fixing tree, black locust (Robinia pseudoacacia), on the distribution of bacterial species were examined in a Japanese black pine (Pinus thunbergii) and black locust-dominated area. DNA was extracted from the soil at depths of 0-5 and 5-10 cm, collected at the border between a Japanese black pine-dominated forest and a black locust-dominated forest, and the distribution of bacterial species was investigated by denaturing gradient gel electrophoresis (DGGE). The bacterial communities did not differ between the two forests. The distribution of some bacterial species correlated significantly with soil pH, soil carbon [C], soil nitrogen [N], and soil N/phosphate [P], but not with soil C/N or soil P. The distributional relationships between ectomycorrhizal (ECM) fungal species and bacterial species were also analyzed. A positive correlation was observed between the distribution of some ECM fungi and bacterial species. These bacteria may have some interactions with ECM fungi in the field.
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inhibition of the regeneration of japanese black pine pinus thunbergii by black locust Robinia pseudoacacia in coastal sand dunes
Journal of Forest Research, 2007Co-Authors: Takeshi Taniguchi, Shigenobu Tamai, Norikazu Yamanaka, Kazuyoshi FutaiAbstract:Pine forests are declining because of pine wilt disease and Robinia pseudoacacia, a nitrogen-fixing species, is dominating coastal forests along the Sea of Japan. We examined the effects of R. pseudoacacia on the regeneration of a native pine species, Pinus thunbergii. Two 200 m2 plots were set up at the border of a P. thunbergii and R. pseudoacacia-dominated area in a coastal forest. We conducted monthly censuses of emergence, distribution and survival of pine seedlings in the plots from May 2003 to December 2004. Light intensity and soil properties were also measured to analyze the relationships between the survival of pine seedlings and environmental conditions using the Mantel test and the structural equation model. Pinus thunbergii seedlings emerged in spring–early summer and in late autumn. Survival of pine seedlings in the R. pseudoacacia-dominated subplots was less than half that in the pine-dominated subplots. Survival of pine seedlings emerging in May 2003 was significantly reduced by the lower light intensity and higher soil nitrogen in R. pseudoacacia-dominated subplots. The tendency was the same for seedlings emerging from April to May 2004. We concluded that R. pseudoacacia reduced the intensity of light during the growing season and increased the nitrogen content of soil, which resulted in inhibition of the natural regeneration of P. thunbergii.
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does ectomycorrhizal fungal community structure vary along a japanese black pine pinus thunbergii to black locust Robinia pseudoacacia gradient
New Phytologist, 2007Co-Authors: Takeshi Taniguchi, Shigenobu Tamai, Norikazu Yamanaka, Natsumi Kanzaki, Kazuyoshi FutaiAbstract:Summary • In this study we examined the role of the nitrogen-fixing tree, Robinia pseudoacacia (black locust), in ectomycorrhizal (ECM) formation and ECM community of Pinus thunbergii (Japanese black pine) seedlings. • Two 200 m2 experimental plots were established at the border between a Japanese black pine- and a black locust-dominated area in a coastal forest. The ECM fungal community of pine seedlings was examined by PCR-RFLP and sequence analysis. We analyzed the relationship between ECM formation, ECM community, growth, and nutrient status of pine seedlings and environmental conditions using the Mantel test and structural equation model. • Percentages of ECM root tips, the number of ECM fungal species and ECM diversity on pine seedlings decreased in the black locust-dominated area. Cenococcum geophilum and Russula spp. were dominant in the Japanese black pine-dominated area, whereas Tomentella spp. were dominant in the black locust-dominated area. Nitrogen (N) concentration in soils or pine seedlings strongly influenced the percentage of ECM root tips, the number of ECM fungal species and ECM fungal similarity. • These results imply the long-term eutrophication caused by N-fixing trees can change ECM formation and ECM community structure.
