Updated on 2022/12/01

写真a

 
MIYAMOTO Takuji
 
Organization
Sakeology Center Specially Appointed Assistant Professor
Title
Specially Appointed Assistant Professor
Contact information
メールアドレス
External link

Degree

  • 博士(農学) ( 2015.10   京都大学 )

  • Master (Agriculture) ( 2012.3   Kyoto University )

  • Bachelor (Agriculture) ( 2010.3   Kyoto University )

Research History (researchmap)

  • Niigata University   Sakeology Center   Specially Appointed Assistant Professor

    2021.2

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  • Kyoto University   Research Institute for Sustainable Humanosphere, Core Research Divisions, Division of Diagnostics and Control of Humanosphere, Laboratory of Metabolic Science of Forest Plants and Microoganisms   Researcher

    2015.7 - 2021.1

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  • Kyoto University   Graduate School of Agriculture, Division of Applied Life Sciences, Plant Nutrition Laboratory   Researcher

    2015.4 - 2015.7

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Research History

  • Niigata University   Sakeology Center   Specially Appointed Assistant Professor

    2021.2

Education

  • Kyoto University   Graduate School of Agriculture   Division of Applied Life Sciences, Plant Nutrition Laboratory, Doctoral Program

    2012.4 - 2015.3

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  • Kyoto University   Graduate School of Agriculture   Division of Applied Life Sciences, Plant Nutrition Laboratory, Master's Course

    2010.4 - 2012.3

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  • Kyoto University   Faculty of Agriculture   Department of Applied Life Science

    2006.4 - 2010.3

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Papers

  • Nitrogen fertilization of rice plants before flowering affects sake fermentation and quality Reviewed

    Takuji MIYAMOTO, Ikuhisa NISHIDA, Norikuni OHTAKE, Dai HIRATA

    Cereal Chemistry   2022.9

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/cche.10603

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  • MYB-mediated regulation of lignin biosynthesis in grasses Invited Reviewed

    Takuji Miyamoto, Yuki Tobimatsu, Toshiaki Umezawa

    Current Plant Biology   24   100174 - 100174   2020.12

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

    DOI: 10.1016/j.cpb.2020.100174

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  • Double knockout of OsWRKY36 and OsWRKY102 boosts lignification with altering culm morphology of rice Reviewed International journal

    Takuji Miyamoto, Rie Takada, Yuki Tobimatsu, Shiro Suzuki, Masaomi Yamamura, Keishi Osakabe, Yuriko Osakabe, Masahiro Sakamoto, Toshiaki Umezawa

    Plant Science   296   110466 - 110466   2020.7

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

    Breeding to enrich lignin, a major component of lignocelluloses, in plants contributes to enhanced applications of lignocellulosic biomass into solid biofuels and valuable aromatic chemicals. To collect information on enhancing lignin deposition in grass species, important lignocellulose feedstocks, we generated rice (Oryza sativa) transgenic lines deficient in OsWRKY36 and OsWRKY102, which encode putative transcriptional repressors for secondary cell wall formation. We used CRISPR/Cas9-mediated targeted mutagenesis and closely characterized their altered cell walls using chemical and nuclear magnetic resonance (NMR) methods. Both OsWRKY36 and OsWRKY102 mutations significantly increased lignin content by up to 28 % and 32 %, respectively. Additionally, OsWRKY36/OsWRKY102-double-mutant lines displayed lignin enrichment of cell walls (by up to 41 %) with substantially altered culm morphology over the single-mutant lines as well as the wild-type controls. Our chemical and NMR analyses showed that relative abundances of guaiacyl and p-coumarate units were slightly higher and lower, respectively, in the WRKY mutant lignins compared with those in the wild-type lignins. Our results provide evidence that both OsWRKY36 and OsWRKY102 are associated with repression of rice lignification.

    DOI: 10.1016/j.plantsci.2020.110466

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  • OsMYB108 loss‐of‐function enriches p‐coumaroylated and tricin lignin units in rice cell walls Reviewed International journal

    Takuji Miyamoto, Rie Takada, Yuki Tobimatsu, Yuri Takeda, Shiro Suzuki, Masaomi Yamamura, Keishi Osakabe, Yuriko Osakabe, Masahiro Sakamoto, Toshiaki Umezawa

    The Plant Journal   98 ( 6 )   975 - 987   2019.6

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

    Breeding approaches to enrich lignins in biomass could be beneficial to improving the biorefinery process because lignins increase biomass heating value and represent a potent source of valuable aromatic chemicals. However, despite the fact that grasses are promising lignocellulose feedstocks, limited information is yet available for molecular-breeding approaches to upregulate lignin biosynthesis in grass species. In this study, we generated lignin-enriched transgenic rice (Oryza sativa), a model grass species, via targeted mutagenesis of the transcriptional repressor OsMYB108 using CRISPR/Cas9-mediated genome editing. The OsMYB108-knockout rice mutants displayed increased expressions of lignin biosynthetic genes and enhanced lignin deposition in culm cell walls. Chemical and two-dimensional nuclear magnetic resonance (NMR) analyses revealed that the mutant cell walls were preferentially enriched in γ-p-coumaroylated and tricin lignin units, both of which are typical and unique components in grass lignins. NMR analysis also showed that the relative abundances of major lignin linkage types were altered in the OsMYB108 mutants.

    DOI: 10.1111/tpj.14290

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/tpj.14290

  • Expression level of the sodium transporter gene OsHKT2;1 determines sodium accumulation of rice cultivars under potassium-deficient conditions Reviewed

    Takuji Miyamoto, Kumiko Ochiai, Yasunori Nonoue, Kazuki Matsubara, Masahiro Yano, Toru Matoh

    Soil Science and Plant Nutrition   61 ( 3 )   481 - 492   2015.5

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    Authorship:Lead author   Publishing type:Research paper (scientific journal)   Publisher:Informa UK Limited  

    DOI: 10.1080/00380768.2015.1005539

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  • Identification of quantitative trait loci associated with shoot sodium accumulation under low potassium conditions in rice plants Reviewed

    Takuji Miyamoto, Kumiko Ochiai, Saya Takeshita, Toru Matoh

    Soil Science and Plant Nutrition   58 ( 6 )   728 - 736   2012.12

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

    Sodium (Na) application has marked beneficial effects on plant growth when the potassium (K) supply is low. Under low K supply, three japonica rice (Oryza sativa L.) cultivars, Koshihikari, Nipponbare, and Sasanishiki, accumulated more Na than three indica cultivars, IR36, IR64, and Kasalath, and the effect of Na application on growth was greater in japonica Koshihikari plants than in indica IR64 plants. A quantitative trait locus (QTL) analysis using a population of backcross inbred lines derived from japonica Koshihikari and indica Kasalath identified two significant loci associated with shoot Na concentration on chromosomes 3 and 6. The quantitative trait locus for shoot Na accumulation on chromosome 6 was confirmed in a population of chromosome segment substitution lines. The major QTL detected in this study could be useful for increasing crop productivity under low K input.

    DOI: 10.1080/00380768.2012.745797

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  • Physiology of microalgae and their application to sustainable agriculture: A mini-review Invited Reviewed

    Iffet Çakirsoy, Takuji Miyamoto, Norikuni Ohtake

    Frontiers in Plant Science   13   2022.11

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    Authorship:Corresponding author  

    DOI: 10.3389/fpls.2022.1005991

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  • Genome-edited rice deficient in two <i>4-COUMARATE:COENZYME A LIGASE</i> genes displays diverse lignin alterations Reviewed

    Osama Ahmed Afifi, Yuki Tobimatsu, Pui Ying Lam, Andri Fadillah Martin, Takuji Miyamoto, Yuriko Osakabe, Keishi Osakabe, Toshiaki Umezawa

    Plant Physiology   2022.9

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstract

    The 4-coumarate:coenzyme A ligase (4CL) is a key enzyme that contributes to channeling metabolic flux in the cinnamate/monolignol pathway, leading to the production of monolignols, p-hydroxycinnamates, and a flavonoid tricin, the major building blocks of lignin polymer in grass cell walls. Vascular plants often contain multiple 4CL genes; however, the contribution of each 4CL isoform to lignin biosynthesis remains unclear, especially in grasses. In this study, we characterized the functions of two rice (Oryza sativa L.) 4CL isoforms (Os4CL3 and Os4CL4) primarily by analyzing the cell wall chemical structures of rice mutants generated by CRISPR/Cas9-mediated targeted mutagenesis. A series of chemical and nuclear magnetic resonance analyses revealed that loss-of-function of Os4CL3 and Os4CL4 differently altered the composition of lignin polymer units. Loss of function of Os4CL3 induced marked reductions in the major guaiacyl and syringyl lignin units derived from both the conserved non-γ-p-coumaroylated and the grass-specific γ-p-coumaroylated monolignols, with more prominent reductions in guaiacyl units than in syringyl units. By contrast, the loss-of-function mutation to Os4CL4 primarily decreased the abundance of the non-γ-p-coumaroylated guaiacyl units. Loss-of-function of Os4CL4, but not of Os4CL3, reduced the grass-specific lignin-bound tricin units, indicating that Os4CL4 plays a key role not only in monolignol biosynthesis but also in the biosynthesis of tricin used for lignification. Further, the loss-of-function of Os4CL3 and Os4CL4 notably reduced cell-wall-bound ferulates, indicating their roles in cell wall feruloylation. Overall, this study demonstrates the overlapping but divergent roles of 4CL isoforms during the coordinated production of various lignin monomers.

    DOI: 10.1093/plphys/kiac450

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  • Lignocellulose molecular assembly and deconstruction properties of lignin-altered rice mutants Reviewed

    Andri Fadillah Martin, Yuki Tobimatsu, Pui Ying Lam, Naoyuki Matsumoto, Takuto Tanaka, Shiro Suzuki, Ryosuke Kusumi, Takuji Miyamoto, Yuri Takeda-Kimura, Masaomi Yamamura, Taichi Koshiba, Keishi Osakabe, Yuriko Osakabe, Masahiro Sakamoto, Toshiaki Umezawa

    Plant Physiology   in press   2022.9

  • Limiting silicon supply alters lignin content and structures of sorghum seedling cell walls Reviewed

    Reza Ramdan Rivai, Takuji Miyamoto, Tatsuya Awano, Arata Yoshinaga, Shuoye Chen, Junji Sugiyama, Yuki Tobimatsu, Toshiaki Umezawa, Masaru Kobayashi

    Plant Science   321   111325 - 111325   2022.8

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

    Sorghum has been recognized as a promising energy crop. The composition and structure of lignin in the cell wall are important factors that affect the quality of plant biomass as a bioenergy feedstock. Silicon (Si) supply may affect the lignin content and structure, as both Si and lignin are possibly involved in plant mechanical strength. However, our understanding regarding the interaction between Si and lignin in sorghum is limited. Therefore, in this study, we analyzed the lignin in the cell walls of sorghum seedlings cultured hydroponically with or without Si supplementation. Limiting the Si supply significantly increased the thioglycolic acid lignin content and thioacidolysis-derived syringyl/guaiacyl monomer ratio. At least part of the modification may be attributable to the change in gene expression, as suggested by the upregulation of phenylpropanoid biosynthesis-related genes under-Si conditions. The cell walls of the-Si plants had a higher mechanical strength and calorific value than those of the +Si plants. These results provide some insights into the enhancement of the value of sorghum biomass as a feedstock for energy production by limiting Si uptake.

    DOI: 10.1016/j.plantsci.2022.111325

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  • Effects of improved sodium uptake ability on grain yields of rice plants under low potassium supply Reviewed

    Kumiko Ochiai, Kousuke Oba, Kanoko Oda, Takuji Miyamoto, Toru Matoh

    Plant Direct   6 ( 4 )   2022.4

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    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/pld3.387

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/pld3.387

  • Structural basis of lignocellulose deconstruction by the wood-feeding anobiid beetle Nicobium hirtum Reviewed

    Ni Putu Ratna Ayu Krishanti, Yuki Tobimatsu, Takuji Miyamoto, Izumi Fujimoto, Titik Kartika, Toshiaki Umezawa, Toshimitsu Hata, Tsuyoshi Yoshimura

    Journal of Wood Science   68 ( 1 )   2022.2

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

    Abstract

    The details of the lignocellulose deconstruction processes in the digestive systems of wood-feeding insects remain elusive. This study aimed to examine the biochemical conversion of lignocellulose in the digestive system of a wood-feeding anobiid beetle, Nicobium hirtum, one of the most important pests of wooden products in Japan. To this end, N. hirtum larvae were fed with Japanese red pine (softwood) and Japanese beech (hardwood) sapwood diets, as well as an artificial diet containing Shorea wood (hardwood) sapwood sawdust. The structural differences between the original and digested (feces) lignocellulose samples were examined using wet-chemical and two-dimensional (2D) nuclear magnetic resonance (NMR) methods. Cellulose and hemicelluloses, especially mannan in the softwood diet, were preferentially degraded over lignin in the larval digestive system. As a result, lignin was enriched in the digested lignocellulose residues. Lignin compositional analyses based on thioacidolysis and 2D NMR determined that the proportions of oxidized lignin aromatic units were notably increased after digestion. Further, the 2D NMR analyses revealed the accumulation of aldehyde and hydroxypropiovanillone/syringone end-unit structures in lignin, indicating that oxidative and/or reductive modifications of lignin polymers occur in the larval digestive system. Such structural alterations of lignin may facilitate the dissociation of the lignin barrier, thereby liberating polysaccharides for subsequent enzymatic conversion for assimilation and energy.

    DOI: 10.1186/s10086-022-02017-6

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    Other Link: https://link.springer.com/article/10.1186/s10086-022-02017-6/fulltext.html

  • Nitrogen deficiency results in changes to cell wall composition of sorghum seedlings Reviewed

    Reza Ramdan Rivai, Takuji Miyamoto, Tatsuya Awano, Rie Takada, Yuki Tobimatsu, Toshiaki Umezawa, Masaru Kobayashi

    Scientific Reports   11 ( 1 )   2021.12

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

    <title>Abstract</title>Sorghum [<italic>Sorghum bicolor</italic> (L.) Moench] has been gaining attention as a feedstock for biomass energy production. While it is obvious that nitrogen (N) supply significantly affects sorghum growth and biomass accumulation, our knowledge is still limited regarding the effect of N on the biomass quality of sorghum, such as the contents and structures of lignin and other cell wall components. Therefore, in this study, we investigated the effects of N supply on the structure and composition of sorghum cell walls. The cell walls of hydroponically cultured sorghum seedlings grown under sufficient or deficient N conditions were analyzed using chemical, two-dimensional nuclear magnetic resonance, gene expression, and immunohistochemical methods. We found that the level of N supply considerably affected the cell wall structure and composition of sorghum seedlings. Limitation of N led to a decrease in the syringyl/guaiacyl lignin unit ratio and an increase in the amount and alteration of tissue distribution of several hemicelluloses, including mixed linkage (1 → 3), (1 → 4)-β-<sc>d</sc>-glucan, and arabinoxylan. At least some of these cell wall alterations could be associated with changes in gene expression. Nitrogen status is thus one of the factors affecting the cell wall properties of sorghum seedlings.

    DOI: 10.1038/s41598-021-02570-y

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    Other Link: https://www.nature.com/articles/s41598-021-02570-y

  • A microscale protocol for alkaline nitrobenzene oxidation of lignins using an easily available reactor. Reviewed

    Masaomi Yamamura, Takuji Miyamoto, Rie Takada, Dwi Widyajayantie, Vincentia Esti Windiastri, Satya Nugroho, Toshiaki Umezawa

    Lignin   2   19 - 24   2021.7

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  • Effects of adding ammonium dihydrogen phosphate to a water-soluble extract of the inner part of oil palm trunk on binderless particleboard. Reviewed

    Rahma Nur Komariah, Takuji Miyamoto, Sukma Surya Kusumah, Soichi Tanaka, Toshiaki Umezawa, Kozo Kanayama, Kenji Umemura

    Bioresources   16 ( 3 )   6015 - 6030   2021.7

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    Publishing type:Research paper (scientific journal)   Publisher:BioResources  

    This study investigated the effects of adding ammonium dihydrogen phosphate (ADP) on the physical and chemical changes of a water-soluble extract of the inner part of oil palm trunk (OPT) to clarify the bonding mechanism of the binderless particleboard. The extract’s effect on ADP-added binderless particleboard was also investigated. OPT particles were treated by hot water at 60 °C for 6 h. Water-soluble extract and treated OPT particles were obtained. ADP was added to the water-soluble extract at 0, 10, and 40 wt%, and the mixtures were heated at 180 °C for 10 min. Furthermore, binderless particleboards using the treated particles were manufactured with similar condition. The 10 wt% ADP mixture changed the water-soluble extract to an insoluble substance, which was twice that of with 0 wt.% ADP addition. Infrared spectroscopy revealed peaks of furan and carbonyl in the insoluble substance. This indicated that the free sugar content in the water-soluble extract would change to furan compounds. Thermal analysis revealed that the resulting insoluble substance had good thermal stability, suggesting a high-molecular-weight substance. The insoluble substance would contribute to bonding of the binderless particleboards. In particular, a significant contribution to the water resistance was observed.

    DOI: 10.15376/biores.16.3.6015-6030

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  • Examination of the usability of leaf chlorophyll content and gene expression analyses as nitrogen status biomarkers in Sorghum bicolor Reviewed

    Reza Ramdan Rivai, Rie Takada, Takuji Miyamoto, Shigeru Hanano, Daisuke Shibata, Katsuaki Ohdoi, Masaru Kobayashi

    Journal of Plant Nutrition   44 ( 6 )   773 - 790   2021.4

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    Publishing type:Research paper (scientific journal)   Publisher:Informa UK Limited  

    Sorghum [Sorghum bicolor (L.) Moench] has been receiving attention as a feedstock for biomass energy. Since nitrogen (N) significantly affects the plant biomass production, diagnosing the N status of sorghum during its growth would be significant. Therefore, in this study, we analyzed the changes in several physiological parameters of sorghum in response to N limitation, with the aim of identifying candidates of N status biomarkers in this species. Parameters responding early and sensitively to N deficiency were searched in hydroponically cultured seedlings, and their applicability to field conditions was examined. We found that the leaf chlorophyll content measured as a soil-plant analysis development (SPAD) value was promising as a candidate N status biomarker, as it showed responses consistent with N regimes in field conditions in multiple genotypes. A gene expression analysis was capable of detecting N deficiency sensitively at an early stage, although its application to practical situations requires further investigation to identify a suitable sets of marker genes.

    DOI: 10.1080/01904167.2020.1867581

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  • Lignin metabolic engineering in grasses for primary lignin valorization. Reviewed

    Toshiaki Umezawa, Yuki Tobimatsu, Masaomi Yamamura, Takuji Miyamoto, Yuri Takeda, Taichi Koshiba, Rie Takada, Pui Ying Lam, Shiro Suzuki, Masahiro Sakamoto

    Lignin   1   30 - 41   2020.9

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  • Variation in lignocellulose characteristics of 30 Indonesian sorghum (Sorghum bicolor) accessions Reviewed

    Y. Wahyuni, T. Miyamoto, H. Hartati, D. Widjayantie, V.E. Windiastri, Y. Sulistyowati, A. Rachmat, N.S. Hartati, S.K. Ragamustari, Y. Tobimatsu, S. Nugroho, T. Umezawa

    Industrial Crops and Products   142   111840 - 111840   2019.12

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

    DOI: 10.1016/j.indcrop.2019.111840

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  • High-performance binderless particleboard from the inner part of oil palm trunk by addition of ammonium dihydrogen phosphate Reviewed

    Rahma Nur Komariah, Takuji Miyamoto, Soichi Tanaka, Kurnia Wiji Prasetiyo, Firda Aulya Syamani, Subyakto, Toshiaki Umezawa, Kozo Kanayama, Kenji Umemura

    Industrial Crops and Products   141   111761 - 111761   2019.12

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

    DOI: 10.1016/j.indcrop.2019.111761

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  • Altered lignocellulose chemical structure and molecular assembly in CINNAMYL ALCOHOL DEHYDROGENASE-deficient rice Reviewed International journal

    Andri Fadillah Martin, Yuki Tobimatsu, Ryosuke Kusumi, Naoyuki Matsumoto, Takuji Miyamoto, Pui Ying Lam, Masaomi Yamamura, Taichi Koshiba, Masahiro Sakamoto, Toshiaki Umezawa

    Scientific Reports   9 ( 1 )   17153 - 17153   2019.12

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    <title>Abstract</title>Lignin is a complex phenylpropanoid polymer deposited in plant cell walls. Lignin has long been recognized as an important limiting factor for the polysaccharide-oriented biomass utilizations. To mitigate lignin-associated biomass recalcitrance, numerous mutants and transgenic plants that produce lignocellulose with reduced lignin contents and/or lignins with altered chemical structures have been produced and characterised. However, it is not fully understood how altered lignin chemistry affects the supramolecular structure of lignocellulose, and consequently, its utilization properties. Herein, we conducted comprehensive chemical and supramolecular structural analyses of lignocellulose produced by a rice <italic>cad2</italic> mutant deficient in <italic>CINNAMYL ALCOHOL DEHYDROGENASE</italic> (<italic>CAD</italic>), which encodes a key enzyme in lignin biosynthesis. By using a solution-state two-dimensional NMR approach and complementary chemical methods, we elucidated the structural details of the altered lignins enriched with unusual hydroxycinnamaldehyde-derived substructures produced by the <italic>cad2</italic> mutant. In parallel, polysaccharide assembly and the molecular mobility of lignocellulose were investigated by solid-state <sup>13</sup>C MAS NMR, nuclear magnetic relaxation, X-ray diffraction, and Simon’s staining analyses. Possible links between <italic>CAD</italic>-associated lignin modifications (in terms of total content and chemical structures) and changes to the lignocellulose supramolecular structure are discussed in the context of the improved biomass saccharification efficiency of the <italic>cad2</italic> rice mutant.

    DOI: 10.1038/s41598-019-53156-8

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    Other Link: http://www.nature.com/articles/s41598-019-53156-8

  • NMR studies on lignocellulose deconstructions in the digestive system of the lower termite Coptotermes formosanus Shiraki Reviewed

    Didi Tarmadi, Yuki Tobimatsu, Masaomi Yamamura, Takuji Miyamoto, Yasuyuki Miyagawa, Toshiaki Umezawa, Tsuyoshi Yoshimura

    Scientific Reports   8 ( 1 )   1290   2018.12

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

    DOI: 10.1038/s41598-018-19562-0

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    Other Link: http://www.nature.com/articles/s41598-018-19562-0.pdf

  • Comparative analysis of lignin chemical structures of sugarcane bagasse pretreated by alkaline, hydrothermal, and dilute sulfuric acid methods Reviewed

    Takuji Miyamoto, Asako Mihashi, Masaomi Yamamura, Yuki Tobimatsu, Shiro Suzuki, Rie Takada, Yoshinori Kobayashi, Toshiaki Umezawa

    Industrial Crops and Products   121   124 - 131   2018.10

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

    DOI: 10.1016/j.indcrop.2018.04.077

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  • A comparative study of the biomass properties of Erianthus and sugarcane: lignocellulose structure, alkaline delignification rate, and enzymatic saccharification efficiency Reviewed

    Takuji Miyamoto, Masaomi Yamamura, Yuki Tobimatsu, Shiro Suzuki, Miho Kojima, Keiji Takabe, Yoshifumi Terajima, Asako Mihashi, Yoshinori Kobayashi, Toshiaki Umezawa

    Bioscience, Biotechnology, and Biochemistry   82 ( 7 )   1143 - 1152   2018.7

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    Authorship:Lead author   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    <title>Abstract</title>
    A comprehensive understanding of the structure and properties of gramineous lignocelluloses is needed to facilitate their uses in biorefinery. In this study, lignocelluloses from fractionated internode tissues of two taxonomically close species, Erianthus arundinaceus and sugarcane (Saccharum spp.), were characterized. Our analyses determined that syringyl (S) lignins were predominant over guaiacyl (G) or p-hydroxyphenyl (H) lignins in sugarcane tissues; on the other hand, S lignin levels were similar to those of G lignin in Erianthus tissues. In addition, tricin units were detected in sugarcane tissues, but not in Erianthus tissues. Distributions of lignin inter-monomeric linkage types were also different in Erianthus and sugarcane tissues. Alkaline treatment removed lignins from sugarcane tissues more efficiently than Erianthus tissues, resulting in a higher enzymatic digestibility of sugarcane tissues compared with Erianthus tissues. Our data indicate that Erianthus biomass displayed resistance to alkaline delignification and enzymatic digestion.

    DOI: 10.1080/09168451.2018.1447358

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  • The effects of various lignocelluloses and lignins on physiological responses of a lower termite, Coptotermes formosanus Reviewed

    Didi Tarmadi, Tsuyoshi Yoshimura, Yuki Tobimatsu, Masaomi Yamamura, Takuji Miyamoto, Yasuyuki Miyagawa, Toshiaki Umezawa

    Journal of Wood Science   63 ( 5 )   464 - 472   2017.10

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

    DOI: 10.1007/s10086-017-1638-z

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    Other Link: http://link.springer.com/content/pdf/10.1007/s10086-017-1638-z.pdf

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Books

  • 日本酒学講義

    新潟大学日本酒学センター( Role: Contributor ,  コラム3 米作りから見る日本酒学)

    ミネルヴァ書房  2022.4  ( ISBN:9784623093182

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    Total pages:x, 306, 5p   Language:Japanese

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  • Rice, its functional foods and the development of novel utilization and advanced processing technology of rice

    ( Role: Contributor ,  Chapter 3, Section 8, Subsection 3, “Interaction between rice cultivation and sake brewing”)

    Technosystem Co., Ltd.  2022.3  ( ISBN:9784924728929

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Teaching Experience

  • 日本酒学A

    2022
    Institution name:新潟大学

  • 日本酒学C

    2021
    Institution name:新潟大学

  • 日本酒学B

    2021
    Institution name:新潟大学

  • 日本酒学A-2

    2021
    Institution name:新潟大学

  • 日本酒学A-1

    2021
    Institution name:新潟大学