論文 - 山本 昭洋
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Nitawaki Y., Yasukochi T., Naono S., Yamamoto A., Saeki Y.
Microbes and environments 39 ( 4 ) ME24023 2024年12月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Microbes and environments
We herein investigated the effects of salt (NaCl) stress on soybean nodulation by rhizobial strains. We specifically exami-ned: (1) the effects of NaCl on nodule maturity and positioning by inoculating three rhizobial strains (Bradyrhizobium diazoefficiens USDA110T, Bradyrhizobium elkanii USDA31, and Sinorhizobium fredii USDA191) onto soybean variety CNS, (2) the effects of the NaCl treatment on isoflavones (daidzein and genistein) secretion by CNS, (3) the effects of the NaCl treatment on gene expression induced by daidzein and genistein in rhizobia, and (4) the effects of the NaCl treatment on rhizobial growth. The results obtained were as follows: (1) the NaCl treatment delayed nodule development and reduced nodulation on the primary root following the USDA110T inoculation, minimal sensitivity regarding nodule formation in the USDA 31 inoculation, and significantly increased the mature nodule number and nodules on the primary root following the USDA 191 inoculation. (2) The NaCl treatment significantly reduced the secretion of daidzein from soybean roots, but did not significantly affect that of genistein. (3) NaCl treatment induced a significant decrease in genistein-induced nodC expression in USDA110T, but not in USDA31, and also caused a significant reduction in daidzein-induced nodC expression, but not genistein-induced expression, in USDA191. (4) NaCl treatment reduced survivability under acidic conditions, but increased survivability under saline-alkaline conditions for USDA191 than bradyrhizobia. These results indicate that saline conditions give S. fredii a competitive advantage over Bradyrhizobium during soybean infection.
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Lee Y., Yamamoto A., Ragaey M., Hashiguchi M., Akashi R., Saeki Y.
Agricultural Research 2024年12月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Agricultural Research
Environmental issues, particularly drought and soil salinity, severely limit plant productivity. This study aimed to examine the general reaction of legumes, specifically Lotus japonicus, against drought stress and their recovery following rehydration. After a 5-week culturing period, drought stress was simulated by withholding irrigation for 7 days. Stress response and recovery were evaluated through bioassays, and measurements of chlorophyll, proline and polyamine (stress reactants), and hydrogen peroxide and malondialdehyde (oxidative stress indices). Drought stress inhibited overall growth and decreased relative water content, but a recovery to control levels was observed after 8 h of re-watering. Hydrogen peroxide and malondialdehyde levels increased under drought stress, but showed no significant difference from control levels upon recovery. The accumulation of proline and polyamines was also observed, suggesting that they are effective responses to drought stress in plants. Furthermore, gene expression of key enzymes involved in proline and polyamine metabolism was regulated by stress conditions. By a short 8-h recovery period, the expression levels of metabolism-related genes of proline and polyamine returned to the pre-stress level, but the accumulation of functional substances was not induced. This study provides insight into the physiological and biochemical changes that occur in plants under drought stress and highlights the importance of proline and polyamine metabolism in plant adaptation to drought stress.
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Soybean gene expression correlated with symbiotic rhizobial nitrogen fixation activity 査読あり
Yano S., Takushima T., Ezawa T., Sugimura Y., Yamamoto A., Saeki Y.
Plant Root 18 35 - 47 2024年12月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Plant Root
Soybean (Glycine max L.) can establish a symbiotic relationship with rhizobia. However, little is known about the host plant genes that correlate with the nitrogen fixation activity of symbiotic rhizobia. In this study, we investigated soybean genes that correlate with bacterial symbiotic nitrogen fixation in two experiments. In the first experiment, soybean seeds were inoculated with two strains of soybean rhizobia exhibiting different nitrogen fixation activities and were grown in the field until the R1 stage. Subsequently, the roots and nodules were subjected to RNA-seq analysis to identify the expression of soybean genes related to bacterial nitrogen fixation. In the second experiment, to confirm host gene expressions dependent on bacterial nitrogen fixation activity, nod+/fix- (Δnif gene) mutants and the wild type were inoculated into soybean, and gene expressions were evaluated by qRT-PCR. GmNRT2.5, a high-affinity nitrate transporter gene, was correlated with nitrogen fixation activity. qPCR analysis of roots and nodules inoculated with a nod+ /fix- mutant revealed that GmNRT2.5 on chromosome 8 (Glyma.08G284000: GmNRT2.5 Chr8) was particularly correlated with nitrogen fixation activity in the root nodule section. Based on the results, it is suggested that Gm-NRT2.5 Chr8 may function as a regulatory gene bridging nitrogen fixation and nitrate absorption from the soil. Therefore, GmNRT2.5 Chr8 might be a useful host gene for estimating symbiotic nitrogen fixation activity.
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Mason M.L.T., De Guzman B.L.T., Mactal A.G., Yamamoto A., Saeki Y.
Rhizosphere 27 100743 2023年9月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Rhizosphere
The influence of three land utilization types (LUT) on the diversity and population of soybean-nodulating rhizobia indicated how human activities affect the ecology of these microorganisms. This report revealed that based on LUT (LUT1-rice-based; LUT2-soybean-based; LUT3-legume-rice), different species of rhizobia can be more abundant than the other species. Targeting the 16S rRNA gene and the 16S-23S rRNA gene ITS region through Polymerase Chain Reaction - Restriction Fragment Length Polymorphisms (PCR-RFLP), it was found out that a majority of the nodulating rhizobia was classified under the genus Bradyrhizobium and the non-nodulating rhizobia was classified under the genus of Sinorhizobium. The species diversity of nodulating rhizobia on the LUT2 showed the lowest at 0.00 whereas the LUT1 showed the highest diversity at 0.87. Similarly, the lowest species diversity of the non-nodulating rhizobia was found on the LUT2 at 0.00 but the highest was obtained from the LUT3 at 0.69. These results suggest that the nodulating rhizobia in this study may have preference with rice-based cropping pattern than with the two cropping systems. On the other hand, the diversity of rhizobia observed on LUT2 indicated that soybean monocropping may have resulted to a lesser diversity of both nodulating and non-nodulating rhizobia. Thus, it can be stated that the change in land utilization even in an agriculture land-use, species diversification and population dominance of certain rhizobia may occur.
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Development of an effective method of human DNA extraction from soil as forensic evidence 査読あり 国際共著
Hiroko Hirashima, Rinnosuke Hisazumi, Maria Luisa T. Mason, Akihiro Yamamoto, Yuichi Saeki
Forensic Science International 335 111284 2022年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Hafiz M.H.R., Salehin A., Adachi F., Omichi M., Saeki Y., Yamamoto A., Hayashi S., Itoh K.
Horticulturae 7 ( 2 ) 1 - 12 2021年2月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Horticulturae
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. A species-specific latitudinal distribution of soybean rhizobia has been reported; Bradyrhi-zobium japonicum and B. elkanii dominate in nodules in northern and southern areas, respectively. The aim of this study was to elucidate whether temperature-dependent proliferation in soil or infection is more reliable for determining the latitudinal characteristic distribution of soybean-nodulating rhizobia under local climate conditions. Three study locations, Fukagawa (temperate continental climate), Matsue and Miyazaki (humid sub-tropical climate), were selected in Japan. Each soil sample was transported to the other study locations, and soybean cv. Orihime (non-Rj) was pot-cultivated using three soils at three study locations for two successive years. Species composition of Bradyrhi-zobium in the nodules was analyzed based on the partial 16S rRNA and 16S–23S rRNA ITS gene sequences. Two Bradyrhizobium japonicum (Bj11 and BjS10J) clusters and one B. elkanii (BeL7) cluster were phylogenetically sub-grouped into two (Bj11-1-2) and four clusters (BjS10J-1-4) based on the ITS sequence. In the Fukagawa soil, Bj11-1 dominated (80–87%) in all study locations. In the Matsue soil, the composition was similar in the Matsue and Miyazaki locations, in which BeL7 dominated (70–73%), while in the Fukagawa location, BeL7 decreased to 53% and Bj11-1 and BjS10J-3 increased. In the Miyazaki soil, BeL7 dominated at 77%, and BeL7 decreased to 13% and 33% in the Fukagawa and Matsue locations, respectively, while BjS10J-2 and BjS10J-4 increased. It was supposed that the B. japonicum strain preferably proliferated in the Fukagawa location, leading to its nodule domi-nancy, while in the Miyazaki location, temperature-dependent infection would lead to the nodule dominancy of B. elkanii, and both factors would be involved in the Matsue location.
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Mason M.L.T., De Guzman B.L.T., Yamamoto A., Saeki Y.
Symbiosis 83 ( 1 ) 55 - 63 2021年1月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Symbiosis
© 2020, Springer Nature B.V. This report aimed to evaluate the ability of the dominant indigenous strains of bradyrhizobia obtained from different locations in the Philippines in terms of their symbiosis, N-fixation and nodulation with various soybean cultivars harboring different Rj genotypes. This was done to select the most efficient and effective strain that can be used as an inoculant under the Philippines’ local condition. Two soybean cultivars from the Philippines and three cultivars from Japan and Brazil were used and inoculated with 12 indigenous strains and the reference strain Bradyrhizobium diazoefficiens USDA110. Culture pots were grown inside a growth chamber for four weeks with 33 °C for 16 h as daytime and 28 °C for 8 h as night time. All the strains formed nodules on all soybean cultivars, except for B. elkanii BO-4, which only formed nodules on Philippines’ cultivars. Among the indigenous strains, B. elkanii IS-2 is significantly the most efficient and effective N-fixer than the other strains for the Philippines’ cultivars. In contrast, B. diazoefficiens SK-5 was found to be the most efficient and effective N-fixer for cultivars from Japan and Brazil. Additionally, a positive correlation was observed between the symbiotic efficiency and the nitrogenase activity indicating an efficient N-fixation by the indigenous strains. Thus, we were able to identify the most promising indigenous bradyrhizobia that could be used as an inoculant to increase the soybean yield in the Philippines and provided insights on soybean inoculation.
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Effect of salt stress on soybean growth and nodulation under inoculation with soybean rhizobia 査読あり
Nitawaki Y., Kitabayashi H., Mason M.L.T., Yamamoto A., Saeki Y.
Soil Science and Plant Nutrition 2020年12月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Soil Science and Plant Nutrition
© 2020 Japanese Society of Soil Science and Plant Nutrition. Salinity is one of the major problems when it comes to soil fertility and agricultural productivity. In this regard, this study aimed to elucidate the influence of four salinity levels (0, 20, 50, 100 mM NaCl) on the soybean growth and the nodulation by rhizobia inoculated on the soybean variety CNS. Additionally, the compatibility of soybean varieties with the seven representative strains of rhizobia was also investigated. Through the compatibility test, it was revealed that the Sinorhizobium (Ensifer) fredii USDA 191 and the three bradyrhizobia (Bradyrhizobium japonicum USDA 6T, B. elkanii USDA 31, and B. diazoefficiens USDA 110T) showed compatible nodulation with the Rfg1 genotype soybean, whereas, the S. fredii USDA 192, 193, and 205T showed incompatible nodulation. The inoculation tests with bradyrhizobia (USDA 31, 110T) and sinorhizobia (USDA 191, 192, 193) indicated a better growth of soybean for bradyrhizobia than the sinorhizobia until 50 mM NaCl. Note that even though the symbiotic efficiency at each strain was not different among 0, 20, and 50 mM NaCl treatments, the symbiotic efficiency of bradyrhizobia was higher than the sinorhizobia at each NaCl treatment. The result of the mix inoculation test indicated that the nodule occupancy rate of strain USDA 191 increased significantly along with the NaCl concentration but strain USDA 110T showed an opposite response. These results indicate a positive relationship between the soybean growth and the nitrogen fixation ability of the inoculant under salt-stress conditions. Furthermore, the results obtained from the mix inoculation test partly describe the dominance of sinorhizobia under saline conditions.
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品評会における煎茶の評価と茶葉中無機元素含有量との関係 査読あり
児﨑章憲，山本昭洋，佐伯雄一
茶業研究報告 ( 129 ) 19 - 26 2020年6月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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品評会における煎茶の評価とアミノ酸，カテキン類，テオガリン，没食子酸およびカフェインとの関係 査読あり
児﨑章憲，山本昭洋，佐伯雄一
茶業研究報告 ( 129 ) 11 - 18 2020年6月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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Ramesh Raj Puri, Fumihiko Adachi, Masayuki Omichi, Yuichi Saeki, Akihiro Yamamoto, Shohei Hayashi, Md Arshad Ali, Kazuhito Itoh
World Journal of Microbiology and Biotechnology 35 176 2019年10月
記述言語：英語 掲載種別：研究論文（学術雑誌）
The aim of this study was to clarify effects of soil and climatic conditions on community structure of sweet potato bacterial
endophytes by applying locked nucleic acid oligonucleotide-PCR clamping technique and metagenomic analysis. For this
purpose, the soil samples in three locations were transferred each other and sweet potato nursery plants from the same farm
were cultivated for ca. 3 months. After removal of plastid, mitochondria and undefined sequences, the averaged numbers of
retained sequences and operational taxonomic units per sample were 20,891 and 846, respectively. Proteobacteria (85.0%),
Bacteroidetes (6.6%) and Actinobacteria (6.3%) were the three most dominant phyla, accounting for 97.9% of the reads, and
γ-Proteobacteria (66.3%) being the most abundant. Top 10 genera represented 81.2% of the overall reads in which Pseudomonas
(31.9–45.0%) being the most predominant. The overall endophytic bacterial communities were similar among the
samples which indicated that the soil and the climatic conditions did not considerably affect the entire endophytic community.
The original endophytic bacterial community might be kept during the cultivation period. -
Culture-dependent analysis of endophytic bacterial community of sweet potato (Ipomoea batatas) in different soils and climates 査読あり
Ramesh Raj Puri, Fumihiko Adachi, Masayuki Omichi, Yuichi Saeki, Akihiro Yamamoto, Shohei Hayashi, Kazuhito Itoh
Journal of Advances in Microbiology 13 ( 2 ) 1 - 12 2018年11月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Maria Luisa Tabing Mason, Baby Lyn Cortez Tabing, Akihiro Yamamoto, Yuichi Saeki
Heliyon 4 ( 11 ) 2018年11月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Heliyon
© 2018 One of the strategies that is commonly used in the Philippines to improve the production of soybean is by inoculation. However, this technique often fails mainly due to the lack of information about the indigenous soybean rhizobia in the Philippines soil. In this study, the diversity of indigenous bradyrhizobia collected from the non-flooded and flooded soil conditions at 11 locations in the country was investigated using a local soybean cultivar as the host plant. The genetic variation among the 424 isolates was detected through Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) treatment and sequence analysis for 16S rRNA gene, 16S-23S rRNA internal transcribed spacer (ITS) region and rpoB housekeeping gene. All the isolates were classified under the Bradyrhizobium species namely B. elkanii, B. diazoefficiens, B. japonicum, B. yuanmingense and a considerable proportion of the isolates were clustered under Bradyrhizobium sp. The isolates which were classified under Bradyrhizobium sp. were thought to be endemic to Philippines soil as evidenced by their nucleotide divergence against the known rhizobia and the historical absence of rhizobia inoculation in the collection sites. The major influence on the distribution and diversity of soybean bradyrhizobia is attributed to the difference in the flooding period, followed by soil properties such as pH, soil type, and nutrient content. As determined, it is proposed that the major micro-symbiont of soybean in the Philippines are B. elkanii for non-flooded soils, then B. diazoefficiens and B. japonicum for flooded soils.
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Mason M., Matsuura S., Domingo A., Yamamoto A., Shiro S., Sameshima-Saito R., Saeki Y.
Plant and Soil 417 ( 1-2 ) 349 - 362 2017年8月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Plant and Soil
© 2017, Springer International Publishing Switzerland. Aims: Understanding the factors that influence the diversity of soybean-nodulating rhizobia is important before doing inoculation. Since studies about this topic in tropical regions are limited, this could lay the groundwork for related research particularly on Bradyrhizobium elkanii. Methods: To determine the genetic diversity of B. elkanii in different regions, we conducted Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) and sequence analysis of 16S rRNA gene, internal transcribed spacer (ITS) region and rpoB gene. Also, sequence analysis of symbiotic nifD and nodD1 genes was conducted. Results: Analysis of the rpoB gene revealed a higher genetic diversity than the ITS region, and possible endemic B. elkanii strains were observed. Meanwhile, no variation was detected among the strains in both nifD and nodD1 phylogenies. Through rpoB gene analysis, variations in the ITS-rpoB type of B. elkanii strains were distinguished and differentiated with that of the closest reference strains. We identified potential soybean inoculants which possess symbiotic efficiency regardless of the Rj genotypes used, suggesting broad host-range of the strains. Conclusions: We show how the genetic diversity of soybean-nodulating B. elkanii strains in subtropical and tropical regions might be influenced by temperature and soil pH and, provided some insights between the symbiotic genes and Rj genotypes.
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Effect of flooding and the nosZ gene in bradyrhizobia on bradyrhizobial community structure in the soil 査読あり
Yuichi Saeki, Misato Nakamura, Maria Luisa T. Mason, Tsubasa Yano, Sokichi Shiro, Reiko Sameshima-Saito, Manabu Itakura, Kiwamu Minamisawa, Akihiro Yamamoto
Microbes and Environments 32 154 - 163 2017年6月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Inhibition of putrescine biosynthesis enhanced salt stress sensitivity and decreased spermidine concentration in rice seedlings. 査読あり
Akihiro Yamamoto, Ie-Sung Shim, Shinsuke Fujihara
Biologia Plantarum 61 ( 2 ) 385 - 388 2017年6月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Identification and Characterization of the Human Cytosolic Sulfotransferases Mediating the Sulfation of Clioquinol and Iodoquinol 査読あり
Akihiro Yamamoto, Maame Debrah-Pinamang, Nicholas J. DiModica, Katsuhisa Kurogi, Ali A. Naqvi, Ying Hui, Yoichi Sakakibara, Masahito Suiko, Ming-Cheh Liu
Drug Metabolism Letters 10 ( 3 ) 200 - 205 2016年9月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Human Cytosolic Sulfotransferase SULT1A3 Mediates the Sulfation of Dextrorphan 査読あり
Akihiro Yamamoto, Katsuhisa Kurogi, Isaac Thomas Schiefer, Ming-Yih Liu, Yoichi Sakakibara, Masahito Suiko, Ming-Cheh Liu
Biological and Pharmaceutical Bulletin 39 ( 9 ) 1432 - 1436 2016年9月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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The relationship between salt gland density and sodium accumulation/secretion in a wide selection from three Zoysia species 査読あり
Akihiro Yamamoto, Masatsugu Hashiguchi, Ryo Akune, Takahito Masumoto, Melody Muguerza, Yuichi Saeki, Ryo Akashi
Australian Journal of Botany 64 ( 4 ) 277 - 284 2016年6月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Temperature-dependent expression of nodC and community structure of soybean-nodulating bradyrhizobia 査読あり
Sokichi Shiro, Chika Kuranaga, Akihiro Yamamoto, Reiko Sameshima-Saito, Yuichi Saeki
Microbes and Environments 31 ( 1 ) 27 - 32 2016年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Sulphation of acetaminophen by the human cytosolic sulfotransferases: a systematic analysis 査読あり
Yamamoto A, Liu MY, Kurogi K, Sakakibara Y, Saeki Y, Suiko M, Liu MC
Journal of Biochemistry 158 497 - 504 2015年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Functional genetic analysis of Arabidopsis thaliana SYNC1 in Lotus corniculatus super-growing roots using the FOX gene-hunting system. 査読あり
Tsubasa Yano, Hidenori Tanaka, Taiki Kurino, Akihiro Yamamoto, Hisato Kunitake, Yuichi Saeki, Ryo Akashi
Plant Root 9 6 - 14 2015年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Effects of polyamines on self-incompatibility-like responses in pollen tubes of Citrus cultivars, Banpeiyu and Hyuganatsu. 査読あり
Yiran Li, Asuka Uchida, Akiha Abe, Akihiro Yamamoto, Tomonari Hirano, Hisato Kunitake
Journal of the American Society for Horticultural Science 140 183 - 190 2015年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Sulfation of phenylephrine by the human cytosolic sulfotranserases. 査読あり
Akihiro Yamamoto, Jiwan Kim, Ming-Yih Liu, Katsuhisa Kurogi, Yoichi Sakakibara, Masahito Suiko, Ming-Cheh Liu
Drug Metabolism Letters 8 96 - 100 2014年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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The phenomenon of root elongation and high respiration activity in the rolB-gene-enhanced FSL#35 variant of Lotus corniculatus FOX-SR line. 査読あり
Tsubasa Yano, Akihiro Yamamoto, Hisato Kunitake, Yuichi Saeki, Ryo Akashi
Plant Root 8 82 - 91 2014年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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窒素固定エンドファイトの窒素固定活性に与える異なる炭素源の影響 査読あり
川上明子，谷田将人，矢野翼，城惣吉，佐伯雄一，山本昭洋
宮崎大学農学部研究報告 60 13 - 20 2014年3月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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2.Mathematical Ecology Analysis of Geographical Distribution of Soybean-Nodulating Bradyrhizobia in Japan 査読あり
Yuichi Saeki, Sokichi Shiro, Toshiyuki Tajima, Akihiro Yamamoto, Reiko Sameshima-Saito, Takashi Sato, Takeo Yamakawa
Microbes and Environments 28 ( 4 ) 470 - 478 2013年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Genetic diversity and geographical distribution of indigenous soybean-nodulating bradyrhizobia in the United States 査読あり
Sokichi SHIRO, Syota MAtsuura, Rina SAIKI, Gilbert SIGUA, Akihiro YAMAMOTO, Yosuke UMEHARA, Masaki HAYASHI, Yuichi SAEKI
Applied Environmental Microbiology 79 ( 12 ) 3610 - 3618 2013年5月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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豚糞尿スラリーを原料としたメタン発酵消化液の微生物群集構造 査読あり
佐伯雄一, 園田亮一, 城惣吉, 矢野翼, 赤木功, 山本昭洋, 杉本安寛
宮崎大学農学部研究報告 59 19 - 28 2013年3月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Chilling-stress responses by rice seedlings grown with different ammonium concentrations and its relationship to leaf spermidine. 査読あり
Yamamoto, A., Shim, I.S., Fujihara, S.
Journal of Plant Biology 55 191 - 197 2012年6月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Effect of Rj-genotype and cultivation temperature on the community structure of soybean-nodulating bradyrhizobia. 査読あり
Shiro, S., Yamamoto, A., Umehara, Y., Hayashi M., Yoshida, N., Nishiwaki, A., Yamakawa, T., Saeki, Y.
Applied Environmental Microbiology 78 1243 - 1250 2012年2月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Effect of salt stress on physiological response and leaf polyamine content in NERICA rice seedlings. 査読あり
Yamamoto, A., Sawada, H., Shim, I.S., Usui, K., Fujihara, S.
Plant, Soil and Environment 57 571 - 576 2011年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Changes in Population Occupancy of Bradyrhizobia under Different Temperature Regimes 査読あり
Yuichi Saeki, Satoru Ozumi, Akihiro Yamamoto, Yosuke Umehara, Masaki Hayashi, Gilbert C. Sigua
Microbes and Environments 25 ( 4 ) 309 - 312 2010年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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豚糞尿を原料としたメタン発酵消化液の液肥としての安全性に関する微生物的評価 査読あり
園田亮一,赤木功,浅野陽樹,山本昭洋,佐伯雄一
宮崎大学農学部研究報告 56 93 - 101 2010年2月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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ダイズ根粒菌の外来遺伝子獲得に関する菌株間差異の解析 査読あり
城惣吉,山本昭洋,吉田ナオト,佐伯雄一
宮崎大学農学部研究報告 56 79 - 87 2010年2月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Intragenomic variation of internal transcribed spacer regions between 16S-23S rRNA genes among the three copies of Sinorhizobium fredii strains 査読あり
Saeki, Y., Oguro, H., Akagi, I., Yamakawa, T., Yamamoto, A.
Soil Science and Plant Nutrition 55 627 - 633 2009年10月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Estimation of nodulation tendency among Rj-genotype soybeans by bradyrhizobial community isolated from an Andosol 査読あり
Minami, M., Yamakawa, T., Yamamoto, A., Akao, S., Saeki, Y.
Soil Science and Plant Nutrition 55 ( 1 ) 65 - 72 2009年2月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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圃場における窒素固定エンドファイト接種サトウキビの固定窒素量の推定 査読あり
中村和美, 谷田将人, 園田誠一郎, 鵜戸西夏奈, 佐伯雄一, 赤尾勝一郎, 山本昭洋
宮崎大学農学部研究報告 55 99 - 108 2009年1月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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Estimation of the bacterial community diversity of soybean-nodulating bradyrhizobia isolated from Rj-genotype soybeans 査読あり
Yuichi SAEKI, Mai MINAMI, Akihiro YAMAMOTO, Shoichiro AKAO
Soil Science and Plant Nutrition 54 ( 5 ) 718 - 724 2008年10月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Colonization and growth promotion characteristics of Enterobacter sp. and Herbaspirillum sp. on Brassica oleracea. 査読あり
Zakria, M., Ohsako, A., Saeki, Y., Yamamoto, A., Akao, S.
Soil Science and Plant Nutrition 54 507 - 516 2008年8月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Infection, multiplication and evaluation of the nitrogen-fixing ability of Herbaspirillum sp. Strain B501gfp1 in sugarcane stems inoculated by the vacuum infiltration method. 査読あり
Zakria, M., Udonishi, K., Saeki, Y., Yamamoto, A., Akao, S.
Microbe and Environment 23 128 - 133 2008年6月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Diversity and Distribution of Indigenous Soybean-Nodulating Rhizobia in the Okinawa Islands, Japan. 査読あり
Suzuki, K., Oguro, H. , Yamakawa, T., Yamamoto, A., Akao, S., Saeki, Y.
Soil Science and Plant Nutrition 54 237 - 246 2008年4月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Influence of inoculation technique on the endophytic colonization of rice by Pantoea sp. isolated from sweet potato and Enterobacter sp. from sugarcane. 査読あり
Zakria, M., Udonishi, K., Ogawa, T., Yamamoto, A., Saeki, Y., Akao, S.
Soil Science and Plant Nutrition 54 224 - 236 2008年4月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Effect of difference in nitrogen media on salt-stress response and contents of nitrogen compounds in rice seedlings 査読あり
Akihiro Yamamoto, Ie-Sung Shim, Shinsuke Fujihara, Tadakatsu Yoneyama, Kenji Usui
Soil Science and Plant Nutrition 50 ( 1 ) 85 - 93 2004年2月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Physiochemical factors affecting the salt tolerance of Echinochloa crus-galli Beauv. var. formosensis Ohwi 査読あり
Akihiro Yamamoto, Ie-Sung Shim, Shinsuke Fujihara, Tadakatsu Yoneyama, Kenji Usui
Weed Biology and Management 3 ( 2 ) 98 - 104 2003年6月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Inhibition of catalase activity by oxidative stress and its relationship to salicylic acid accumulation in plants 査読あり
Ie-Sung Shim, Yukie Momose, Akihiro Yamamoto, Dea-Wook Kim, Kenji Usui
Plant Growth Regulation 39 ( 3 ) 285 - 292 2003年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）