Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

DOI： 10.1016/j.soilbio.2021.108186

researchmap

Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s00374-020-01525-1

researchmap

Other Link： http://link.springer.com/article/10.1007/s00374-020-01525-1/fulltext.html

Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

DOI： 10.1016/j.apsoil.2020.103599

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s00374-020-01502-8

researchmap

Other Link： http://link.springer.com/article/10.1007/s00374-020-01502-8/fulltext.html

Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media {LLC}  

DOI： 10.1007/s00374-020-01431-6

researchmap

Other Link： http://link.springer.com/article/10.1007/s00374-020-01431-6/fulltext.html

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Soil bacterial community compositions and temporal changes in organic paddy fields were elucidated using a 16S rRNA gene amplicon sequencing analysis with a high-throughput next generation sequencer. At transplanting, bacterial community compositions in organic and conventional paddy fields were mostly similar despite differences in field management. The bacterial community composition in organic fields differed from that under conventional management during the rice growth period, possibly as a result of the decomposition process of organic fertilizers. However, differences in the frequency of tillage and photosynthetic bacterial inoculations in the organic plots had less of an impact on bacterial communities.

DOI： 10.1264/jsme2.ME18101

PubMed

researchmap

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：MDPI AG  

Sake, which is produced mainly from japonica rice (Oryza sativa subsp. japonica), is one of the most important alcohol products in Japan. In this study, we aimed to investigate a hypothesis that the early root endophytic bacterial communities in Japanese sake rice cultivars would be distinct from those in table rice cultivars, comparing four sake rice cultivars and two table rice cultivars. Rice roots in the vegetative stage were collected 0, 3, and 6 weeks after transplanting, and 16S rRNA gene amplicon sequencing revealed significant differences in bacterial community composition diversity between the sake and table rice cultivars. The root endophytic bacterial communities at the transplanting differed significantly between the rice cultivars, indicating differences in each seed-derived endophytic community. After an overall dominance of Pantoea and Methylobacterium-Methylorubrum at the transplanting, the endophytic community was gradually replaced by soil-derived bacteria that varied by the rice cultivars. Notably, PERMANOVA results showed that the rice endophytic bacterial community composition differed significantly between the sake and table rice cultivars (p < 0.001). These results highlight the distinct root endophytic bacterial composition in the sake rice cultivars compared to those in the table rice cultivars, supporting our hypothesis.

DOI： 10.3390/agronomy14081769

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s42832-023-0221-3

researchmap

Other Link： https://link.springer.com/article/10.1007/s42832-023-0221-3/fulltext.html

Language：English   Publishing type：Research paper (scientific journal)   Publisher：MDPI AG  

Endophytic prokaryotes, bacteria, and archaea, are important microorganisms that benefit host plants by promoting plant growth and reducing stress. The objective of this study was to evaluate temporal shifts in the root endophytic prokaryotic communities associated with carrots (Daucus carota subsp. sativus) and the effect of organic matter application on them. Carrots were grown in a planter under five fertilizer treatments (weed compost, bark compost, cattle manure, chemical fertilizer, and no-fertilizer control) and the compositions of rhizosphere and root endosphere prokaryotic communities were determined via amplicon sequencing analysis targeting the 16S rRNA gene at 60 and 108 days after sowing. The results showed that the rhizosphere prokaryotic community compositions were stable despite different sampling times and fertilizer treatments; however, a greater temporal shift and an effect of the type of organic matter applied were observed in the endosphere prokaryotic communities. The differences in treatments resulted in significant differences in the abundance and Faith pyrogenetic diversity of the endosphere prokaryotic community. Genera, such as Burkholderia, Sphingomonas, and Rhodanobacter, that exhibit plant-growth-promoting and biocontrol activities, were detected regardless of the treatments, suggesting that they may play an important ecological role as the core endophytes in carrot roots.

DOI： 10.3390/microorganisms11102377

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s10967-022-08448-1

Web of Science

researchmap

Other Link： https://link.springer.com/article/10.1007/s10967-022-08448-1/fulltext.html

Language：English   Publishing type：Research paper (scientific journal)   Publisher：MDPI AG  

Environmental pollution by microplastics (MPs) has become a global problem, but little is known about MPs in soils. This is because MP extraction methods from soils have not yet been standardized. In this study, we tried to establish a simple and economical method to extract soil MPs using the buoyancy of canola oil and the density separation process using sodium chloride (NaCl). In addition, the incineration method was adapted to evaluate the effectiveness of extraction methods precisely. First, the ability and suitability of seven different oils to extract MP from soil were investigated and canola oil was selected. Then, the spiking and recovery test was performed with canola oil and NaCl solution for low-density polyethylene (LDPE), polypropylene (PP), and polyvinylchloride (PVC) as follows: (1) soil and MP mixtures were prepared, (2) 5 g L−1 NaCl and canola oil were added and shaken thoroughly, (3) the oil phase containing MPs were separated after sedimentation, (4) the extracted MPs were rinsed with 99.5% ethanol, and (5) the organic adherents to the extracted MPs were digested with hydrogen peroxide. After drying and incineration, the substantial recovery rates were calculated. In the spiking and recovery test for MP particles (<1 mm) from five typical Japanese agricultural soils, the recoveries of LDPE, PP, and PVC were 95.2–98.3%, 95.2–98.7%, and 76.0–80.5%, respectively, higher than those obtained by the density separation using saturated NaCl solution. In conclusion, the method is effective for extracting MPs, especially LDPE and PP, from soils and is less sensitive to soil type, texture, and physicochemical properties.

DOI： 10.3390/soilsystems6020054

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s10967-022-08350-w

researchmap

Other Link： https://link.springer.com/article/10.1007/s10967-022-08350-w/fulltext.html

Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

DOI： 10.1016/j.soilbio.2021.108397

researchmap

Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

DOI： 10.1016/j.rhisph.2021.100357

researchmap

Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s00374-020-01523-3

researchmap

Other Link： http://link.springer.com/article/10.1007/s00374-020-01523-3/fulltext.html

Language：English   Publishing type：Research paper (scientific journal)  

To identify the cause of the phenomenon that rice plants close to the water inlet contain relatively higher radiocesium within a paddy field plot, we conducted a field experiment by establishing experimental channel using polypropylene corrugated sheets, and sampling surface water, paddy soil and rice plants according to the distance from the water inlet in 2014 and 2015. It was found that the 137Cs activity concentrations in both dissolved and particulate forms in paddy surface water presented a declining trend from the water inlet towards the outlet. The 137Cs activity concentration in paddy soil in the harvesting season and those of brown rice and rice straws were highest at 1-2 m from the water inlet. Balance calculation suggests that destination of the lost 137Cs from the surface water was likely to be adsorption of the dissolved form and sedimentation of particulate form onto the soil. The concentration of exchangeable potassium ion in paddy soil was below the recommended standard of 250 mg kg-1 (as K2O in dry soil) near the water inlet at the harvesting period both years．These findings suggested that the possible crucial factors to induce rice plant uptake of radiocesium near the water inlet were either (1) direct absorption of dissolved 137Cs in surface water by rice plants, (2) absorption of 137Cs, which was originally retained in particulate matter and released by ion exchange and/or by organic matter decomposition in combination with (3) loss of soil exchangeable potassium caused due partly to transportation of soil particles with exchangeable potassium by the rapid water flow near the water inlet and/or leaching by ion exchange onto the soil of other cations such as calcium ion flowing into the paddy field. These findings will contribute to providing possible measures for producing safe rice in highly contaminated areas in which agricultural production will resume in the near future. We propose providing a non-planting zone for the area closer than about 5 m from the water intake to avoid the occurrence of high 137Cs concentrations in rice crops.

DOI： 10.1016/j.jenvrad.2020.106441

PubMed

researchmap

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media {LLC}  

DOI： 10.1007/s42161-020-00503-8

researchmap

Other Link： http://link.springer.com/article/10.1007/s42161-020-00503-8/fulltext.html

Authorship：Lead author,　Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Informa {UK} Limited  

DOI： 10.1080/00380768.2019.1706432

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Taylor and Francis Ltd.  

Nineteen Trichoderma isolates, collected from different locations in Bangladesh, were characterised through phenotypic, biochemical and molecular means. Besides, they were assessed for their antifungal action in vitro. The isolates were divided into three groups: T. asperellum, T. virens and T. harzianum. A dual culture assay and a culture filtrate assay against 6 phytopathogens revealed that 9 of the 19 isolates showed significant antifungal activities. The isolate T. harzianum TR05 showed the highest inhibition against Fusarium oxysporum, Rhizoctonia solani, Fusarium circinatum and Phomopsis vexans, followed by T. asperellum TR08 and T. virens TR06. TR08 had the highest inhibition against Sclerotium rolfsii and Pythium aphanidermatum, followed by TR05 and TR06. These findings were in agreement with their activities of extracellular hydrolytic enzymes, including chitinase, β-1,3-glucanase, and proteinase. Our results suggest that isolates TR05, TR06 and TR08 have the potential to be effective biocontrol agents against the phytopathogenic fungi.

DOI： 10.1080/03235408.2016.1147121

Scopus

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：SPRINGER  

Biological control, especially with Bacillus-based biocontrol agents, offers an attractive alternative to synthetic pesticides for sustainable management of white mold disease caused by Sclerotinia sclerotiorum. In this study, eight effective Bacillus isolates were isolated from rhizospheric soil samples as potential bacterial biocontrol agents. Cultural, biochemical, and molecular analyses of 16S rDNA and gyrase subunit A (gyrA) confirmed that all isolates were identified as Bacillus amyloliquefaciens subsp. plantarum. The production of hydrolytic enzymes and the plant growth-promotional attributes of these isolates confirmed their multifaceted potential. Molecular analysis of the eight biosynthetic genes, which are related to antibiotic properties of bacilli, revealed that all of the isolates possess five genes: bacA for bacilysin, dfnM for difficidin, fenA for fengycin, ituA for iturin, and sfp for surfactin. The Bacillus isolates inhibited mycelial growth and suppressed formation of sclerotia during an in vitro test against S. sclerotiorum. Deformities and cell-wall lysis of mycelia, abnormalities of apothecia, and germination failure of ascospores through interaction with the Bacillus isolates were observed with light and scanning electron microscopes, suggesting that they have high antagonistic effects against S. sclerotiorum. Seed bacterization with the Bacillus isolates protected mustard seedlings in vitro up to 98 % against S. sclerotiorum. In a pot experiment, damages of mustard plants against the pathogen decreased up to 90 % after foliar spray of the Bacillus isolates. In addition, the isolates increased seed germination and accelerated seedling vigor of mustard, suggesting that they have plant growth-promoting functions.

DOI： 10.1007/s13313-016-0397-4

Web of Science

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：TAYLOR & FRANCIS INC  

A minimal amount of information is currently available concerning arbuscular mycorrhizal (AM) fungal associations with crops in semi-arid zones on Leptosols in Turkey. Therefore, using molecular ecological techniques, we studied the effects of different management practices (without fertilization, chemical fertilization, farmyard manure, and plant compost amendments) on AM fungal communities associated with wheat roots. Experiments were conducted in a field established in 1996 in southern Mediterranean Turkey where soil productivity is low owing to unfavorable climatic effects and soil characteristics. We determined 201 partial sequences of AM fungal nuclear ribosomal large subunit genes. The higher AM fungal richness was found in the control treatment without fertilization and plant compost treatments compared with the chemical fertilization and farmyard manure treatments. Clones related to Rhizophagus were found in all treatments and accounted for 37% of the total AM fungal clones, whereas those of Funneliformis were dominant under chemical fertilization. Redundancy analysis based on the frequency of operational taxonomic units revealed that AM fungal communities were divided into three groups, namely, the control treatment, the chemical fertilization treatment, and the organic treatments (farmyard manure and plant compost treatments). Although different organic amendments supported relatively similar AM fungal communities, plant compost induced higher AM fungal richness than farmyard manure fertilization.

DOI： 10.1080/15324982.2016.1177749

Web of Science

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：TAYLOR & FRANCIS LTD  

Little is known about the distribution of arbuscular mycorrhizal fungi (AMF, phylum Glomeromycota) in the Turkish arable soils. In this study, we investigated AM fungal phylotype composition in the roots of 13 different plant samples from one site each of the East Black Sea, Mediterranean, and Central Anatolian regions of Turkey. Fifty-seven distinguished operational taxonomic units at 97% nucleotide sequence identity were recorded among 424 partial sequences of the nuclear ribosomal large subunit (LSU) RNA genes determined. Most of the new sequences were clustered within 10 well-resolved phyloclades of the order Glomerales. About half of the newly determined sequences lacked similar sequences in the public databases. In particular, all sequences from Camellia sinensis collected in the East Black Sea region had only 83-97% sequence similarity to known AMF species. The findings suggest that novel and endemic AMF species may exist in Turkish agricultural soils. The AM fungal community composition in the East Black Sea region was relatively simple and completely differed from those in the other two regions, presumably due to the low soil pH and host specificity. The AM fungal community compositions of the Mediterranean and Central Anatolian samples were broadly similar; however, some sequences related to Rhizophagus were found only in the Mediterranean samples. This reflects the trend that more diverse AM fungal communities are established in the Mediterranean region than the Central Anatolian region.

DOI： 10.1080/00380768.2014.890916

Web of Science

researchmap

Language：Japanese   Publisher：一般社団法人 日本土壌肥料学会  

DOI： 10.20710/dohikouen.58.0_49_3

CiNii Article

CiNii Books

researchmap

Language：Japanese   Publisher：日本土壌微生物学会  

DOI： 10.18946/jssm.66.2_86_1

CiNii Article

researchmap

Event date： 2021.1

Language：English   Presentation type：Poster presentation  

researchmap

Event date： 2021.1

Language：English   Presentation type：Poster presentation  

researchmap

Event date： 2021.1

Language：English   Presentation type：Poster presentation  

researchmap

Event date： 2020.9

Language：Japanese   Presentation type：Poster presentation  

researchmap

Event date： 2020.9

Language：English   Presentation type：Poster presentation  

researchmap

Event date： 2020.9

Language：Japanese   Presentation type：Poster presentation  

researchmap

Event date： 2019.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Ankara,Turkey  

researchmap

Event date： 2019.6

Language：English   Presentation type：Poster presentation  

Venue：Ankara,Turkey  

researchmap

Event date： 2019.6

Language：English   Presentation type：Poster presentation  

Venue：Ankara,Turkey  

researchmap

Event date： 2019.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Ankara,Turkey  

researchmap

Event date： 2019.6

Language：English   Presentation type：Oral presentation (general)  

researchmap

Event date： 2019.6

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2019.6

Language：English   Presentation type：Poster presentation  

researchmap

Event date： 2019.6

Language：Japanese   Presentation type：Poster presentation  

researchmap

Event date： 2019.5

Language：English   Presentation type：Oral presentation (general)  

Venue：Sendai,Japan  

researchmap

Event date： 2019.5

Language：English   Presentation type：Poster presentation  

Venue：Sendai,Japan  

researchmap

Event date： 2019.5

Language：English   Presentation type：Poster presentation  

Venue：Sendai,Japan  

researchmap

Event date： 2018.12

Language：Japanese   Presentation type：Poster presentation  

researchmap

Event date： 2018.12

Language：Japanese   Presentation type：Poster presentation  

researchmap

Event date： 2018.12

Language：Japanese   Presentation type：Poster presentation  

researchmap

Event date： 2018.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Malaysia  

researchmap

Event date： 2018.11

Language：English   Presentation type：Poster presentation  

Venue：Malaysia  

researchmap

Event date： 2018.11

Language：English   Presentation type：Poster presentation  

Venue：Malaysia  

researchmap

Event date： 2018.11

Language：English   Presentation type：Poster presentation  

Venue：Malaysia  

researchmap

Event date： 2018.11

Language：English   Presentation type：Poster presentation  

Venue：Malaysia  

researchmap

Event date： 2018.11

Language：English   Presentation type：Poster presentation  

Venue：Malaysia  

researchmap

Event date： 2018.7

Language：English   Presentation type：Poster presentation  

researchmap

Event date： 2017.8 - 2017.9

Language：Japanese   Presentation type：Poster presentation  

researchmap

Event date： 2017.8 - 2017.9

Language：Japanese   Presentation type：Poster presentation  

researchmap

Event date： 2016.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Fukushima,Japan  

researchmap

Event date： 2016.3

Language：English   Presentation type：Oral presentation (general)  

Venue：Niigata,Japan  

researchmap

Event date： 2016.3

Language：English   Presentation type：Poster presentation  

Venue：Niigata,Japan  

researchmap

Event date： 2016.3

Language：English   Presentation type：Poster presentation  

Venue：Niigata,Japan  

researchmap

Event date： 2015.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Chiang Mai,Thailand  

researchmap

Event date： 2015.5

Language：Japanese   Presentation type：Poster presentation  

researchmap

Event date： 2015.5

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：English   Presentation type：Poster presentation  

Venue：Instanbul,Turkey  

researchmap

Language：English   Presentation type：Poster presentation  

Venue：Dijon,France  

researchmap

Language：English   Presentation type：Poster presentation  

Venue：Antalya,Turkey  

researchmap

Language：English   Presentation type：Poster presentation  

Venue：Jeju,Korea  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：English   Presentation type：Poster presentation  

Venue：Izmir,Turkey  

researchmap