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Keiki Ishiyama · SciRah

Researcher profile · Semantic Scholar

Keiki Ishiyama

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Keiki Ishiyama — researcher profile on SciRah

h-index: 24
Works: 55
Citations: 2,704

Most-cited papers

The Organization of High-Affinity Ammonium Uptake in Arabidopsis Roots Depends on the Spatial Arrangement and Biochemical Properties of AMT1-Type Transporters[W]
Lixing Yuan, D. Loqué, S. Kojima, Sabine Rauch +4 more
2007The Plant Cell Online386 citations Open access
Semantic Scholar
Severe reduction in growth rate and grain filling of rice mutants lacking OsGS1;1, a cytosolic glutamine synthetase1;1.
M. Tabuchi, Kenjiro Sugiyama, Keiki Ishiyama, Eri Inoue +3 more
2005The Plant Journal283 citations Open access
Semantic Scholar
Additive contribution of AMT1;1 and AMT1;3 to high-affinity ammonium uptake across the plasma membrane of nitrogen-deficient Arabidopsis roots.
D. Loqué, Lixing Yuan, S. Kojima, A. Gojon +5 more
2006The Plant Journal227 citations
Semantic Scholar
Kinetic Properties and Ammonium-dependent Regulation of Cytosolic Isoenzymes of Glutamine Synthetase in Arabidopsis*
Keiki Ishiyama, Eri Inoue, A. Watanabe-Takahashi, Mitsuhiro Obara +2 more
2004Journal of Biological Chemistry190 citations Open access
Semantic Scholar
Transgenic rice overproducing Rubisco exhibits increased yields with improved nitrogen-use efficiency in an experimental paddy field
Dong-Kyung Yoon, Keiki Ishiyama, Mao Suganami, Youshi Tazoe +8 more
2020Nature Food145 citations
Semantic Scholar
Biochemical background and compartmentalized functions of cytosolic glutamine synthetase for active ammonium assimilation in rice roots.
Keiki Ishiyama, Eri Inoue, M. Tabuchi, T. Yamaya +1 more
2004Plant and Cell Physiology140 citations Open access
Semantic Scholar
Overexpression of AtCpNifS Enhances Selenium Tolerance and Accumulation in Arabidopsis1
D. Van Hoewyk, G. Garifullina, Ashley R. Ackley, S. Abdel-Ghany +7 more
2005Plant Physiology131 citations
Semantic Scholar
A Ca(2+)-dependent protein kinase that endows rice plants with cold- and salt-stress tolerance functions in vascular bundles.
Y. Saijo, Natsuko Kinoshita, Keiki Ishiyama, S. Hata +6 more
2001Plant and Cell Physiology128 citations Open access
Semantic Scholar
The Transport of Prolamine RNAs to Prolamine Protein Bodies in Living Rice Endosperm Cells Online version contains Web-only data. Article, publication date, and citation information can be found at www.plantcell.org/cgi/doi/10.1105/tpc.013466.
S. Hamada, Keiki Ishiyama, Sang-Bong Choi, Changlin Wang +4 more
2003The Plant Cell Online85 citations Open access
Semantic Scholar
NADH-dependent glutamate synthase plays a crucial role in assimilating ammonium in the Arabidopsis root.
N. Konishi, Keiki Ishiyama, Kaya Matsuoka, Ikumi Maru +3 more
2014Physiologia Plantarum : An International Journal for Plant Biology84 citations Open access
Semantic Scholar
Contributions of two cytosolic glutamine synthetase isozymes to ammonium assimilation in Arabidopsis roots
N. Konishi, Keiki Ishiyama, M. Beier, Eri Inoue +4 more
2016Journal of Experimental Botany74 citations Open access
Semantic Scholar
Dual Regulated RNA Transport Pathways to the Cortical Region in Developing Rice Endosperm Article, publication date, and citation information can be found at www.plantcell.org/cgi/doi/10.1105/tpc.013821.
S. Hamada, Keiki Ishiyama, Chotipa Sakulsingharoj, Sang-Bong Choi +6 more
2003The Plant Cell Online74 citations Open access
Semantic Scholar
Expression of NADH-dependent glutamate synthase protein in the epidermis and exodermis of rice roots in response to the supply of ammonium ions
Keiki Ishiyama, T. Hayakawa, T. Yamaya
1998Planta71 citations
Semantic Scholar
Asparagine synthetase1, but not asparagine synthetase2, is responsible for the biosynthesis of asparagine following the supply of ammonium to rice roots.
Miwa Ohashi, Keiki Ishiyama, S. Kojima, N. Konishi +4 more
2015Plant and Cell Physiology62 citations Open access
Semantic Scholar
Lack of cytosolic glutamine synthetase1;2 in vascular tissues of axillary buds causes severe reduction in their outgrowth and disorder of metabolic balance in rice seedlings.
Miwa Ohashi, Keiki Ishiyama, M. Kusano, Atsushi Fukushima +8 more
2015The Plant Journal51 citations Open access
Semantic Scholar
Lack of Cytosolic Glutamine Synthetase1;2 Activity Reduces Nitrogen-Dependent Biosynthesis of Cytokinin Required for Axillary Bud Outgrowth in Rice Seedlings
Miwa Ohashi, Keiki Ishiyama, S. Kojima, M. Kojima +3 more
2017Plant and Cell Physiology46 citations Open access
Semantic Scholar
Pregnancy prediction on the day of embryo transfer (Day 7) and Day 14 by measuring luteal blood flow in dairy cows.
T. Kanazawa, Motohide Seki, Keiki Ishiyama, Tomoaki Kubo +4 more
2016Theriogenology45 citations
Semantic Scholar
Photosynthetic Enhancement, Lifespan Extension, and Leaf Area Enlargement in Flag Leaves Increased the Yield of Transgenic Rice Plants Overproducing Rubisco Under Sufficient N Fertilization
Masami Tanaka, Mamoru Keira, Dong-Kyung Yoon, T. Mae +3 more
2021Rice43 citations Open access
Semantic Scholar
Cell type distinct accumulations of mRNA and protein for NADH-dependent glutamate synthase in rice roots in response to the supply of NH4+
Keiki Ishiyama, S. Kojima, Hideki Takahashi, T. Hayakawa +1 more
200339 citations
Semantic Scholar
Overproduction of Chloroplast Glyceraldehyde-3-Phosphate Dehydrogenase Improves Photosynthesis Slightly under Elevated [CO2] Conditions in Rice.
Yuji Suzuki, Keiki Ishiyama, Misaki Sugawara, Yuka Suzuki +7 more
2020Plant and Cell Physiology31 citations
Semantic Scholar
Overproduction of PGR5 enhances the electron sink downstream of photosystem I in a C4 plant, Flaveria bidentis.
Youshi Tazoe, Noriko Ishikawa, T. Shikanai, Keiki Ishiyama +4 more
2020The Plant Journal27 citations Open access
Semantic Scholar
A mathematical model of phloem sucrose transport as a new tool for designing rice panicle structure for high grain yield.
Motohide Seki, F. Feugier, Xian-Jun Song, M. Ashikari +6 more
2015Plant and Cell Physiology27 citations
Semantic Scholar
Manganese toxicity disrupts indole acetic acid homeostasis and suppresses the CO2 assimilation reaction in rice leaves
Daisuke Takagi, Keiki Ishiyama, Mao Suganami, Tomokazu Ushijima +5 more
2021Scientific Reports26 citations Open access
Semantic Scholar
A temporal and spatial contribution of asparaginase to asparagine catabolism during development of rice grains
Yui Yabuki, Miwa Ohashi, Fumi Imagawa, Keiki Ishiyama +6 more
2017Rice26 citations Open access
Semantic Scholar
Reduction in sucrose contents by downregulation of fructose-1,6-bisphosphatase 2 causes tiller outgrowth cessation in rice mutants lacking glutamine synthetase1;2
Miwa Ohashi, Keiki Ishiyama, M. Kusano, Atsushi Fukushima +3 more
2018Rice24 citations Open access
Semantic Scholar
High yielding ability of a large-grain rice cultivar, Akita 63
A. Makino, Y. Kaneta, Mitsuhiro Obara, Keiki Ishiyama +4 more
2020Scientific Reports23 citations Open access
Semantic Scholar
Cytosolic Glutamine Synthetase GS1;3 Is Involved in Rice Grain Ripening and Germination
T. Fujita, M. Beier, Mayumi Tabuchi-Kobayashi, Yoshitaka Hayatsu +12 more
2022Frontiers in Plant Science22 citations Open access
Semantic Scholar
NADH-dependent glutamate synthase participated in ammonium assimilation in Arabidopsis root
S. Kojima, N. Konishi, M. Beier, Keiki Ishiyama +3 more
2014Plant Signalling & Behavior22 citations Open access
Semantic Scholar
Enhancing photosynthesis and yield in rice with improved N use efficiency.
A. Makino, Yuji Suzuki, Keiki Ishiyama
2022Plant Science21 citations Open access
Semantic Scholar
Outgrowth of Rice Tillers Requires Availability of Glutamine in the Basal Portions of Shoots
Miwa Ohashi, Keiki Ishiyama, S. Kojima, N. Konishi +4 more
2018Rice19 citations Open access
Semantic Scholar
Coregulation of glutamine synthetase1;2 (GLN1;2) and NADH-dependent glutamate synthase (GLT1) gene expression in Arabidopsis roots in response to ammonium supply
S. Kojima, Haruka Minagawa, Chika Yoshida, Eri Inoue +2 more
2023Frontiers in Plant Science18 citations Open access
Semantic Scholar
The urea transporter DUR3 contributes to rice production under nitrogen-deficient and field conditions.
M. Beier, T. Fujita, K. Sasaki, K. Kanno +9 more
2019Physiologia Plantarum : An International Journal for Plant Biology18 citations
Semantic Scholar
Gln49 and Ser174 residues play critical roles in determining the catalytic efficiencies of plant glutamine synthetase.
Keiki Ishiyama, Eri Inoue, T. Yamaya, Hideki Takahashi
2006Plant and Cell Physiology18 citations Open access
Semantic Scholar
Differential distribution of proteins expressed in companion cells in the sieve element-companion cell complex of rice plants.
A. Fukuda, S. Fujimaki, T. Mori, N. Suzui +6 more
2005Plant and Cell Physiology16 citations
Semantic Scholar
The gs3 allele from a large‐grain rice cultivar, Akita 63, increases yield and improves nitrogen‐use efficiency
Dong-Kyung Yoon, Mao Suganami, Keiki Ishiyama, T. Kagawa +8 more
2022Plant Direct13 citations Open access
Semantic Scholar
Administration of gonadotropin-releasing hormone agonist on Day 5 increases luteal blood flow and improves pregnancy prediction accuracy on Day 14 in recipient Holstein cows
T. Kanazawa, Motohide Seki, Keiki Ishiyama, Masao Araseki +2 more
2017Journal of reproduction and development10 citations Open access
Semantic Scholar
Effects of co-overproduction of Rubisco and chloroplast glyceraldehyde-3-phosphate dehydrogenase on photosynthesis in rice
Yuji Suzuki, Keiki Ishiyama, A. Cho, Yuki Takegahara-Tamakawa +3 more
20219 citations
Semantic Scholar
Ammonium Assimilation and Metabolism in Rice
S. Kojima, Keiki Ishiyama, M. Beier, T. Hayakawa
20208 citations
Semantic Scholar
Organization and Structure of Ferredoxin-Dependent Glutamate Synthase Gene and Intracellular Localization of the Enzyme Protein in Rice Plants
T. Hayakawa, T. Sakai, Keiki Ishiyama, Naoya Hirose +7 more
20037 citations Open access
Semantic Scholar
Contribution of the grain size QTL GS3 to yield properties and physiological nitrogen-use efficiency in the large-grain rice cultivar ‘Akita 63’
Mitsuhiro Obara, Y. Kaneta, Ikuko Kodama, Sinichi Matsumoto +4 more
2022Breeding Science6 citations Open access
Semantic Scholar
Suppression of chloroplast triosephosphate isomerase evokes inorganic phosphate-limited photosynthesis in rice.
Yuji Suzuki, Keiki Ishiyama, Dong-Kyung Yoon, Yuki Takegahara-Tamakawa +5 more
2021Plant Physiology5 citations Open access
Semantic Scholar
NADH-dependent glutamate synthase participated in ammonium assimilation in Arabidopsis root.
S. Kojima, N. Konishi, M. Beier, Keiki Ishiyama +3 more
2014Plant Signalling & Behavior2 citations
Semantic Scholar
Analyses of the transgenic rice plants expression antisense NADH-GOGAT RNA
Keiki Ishiyama, Fumihiko Kajita, Yuri Ishii, N. Suzuki +3 more
19992 citations
Semantic Scholar
Manganese toxicity disrupts indole acetic acid homeostasis and suppresses CO2 assimilation reaction in rice plants
Daisuke Takagi, Keiki Ishiyama, Mao Suganami, Tomokazu Ushijima +5 more
2021bioRxiv1 citations Open access
Semantic Scholar
Transgenic rice overproducing Rubisco exhibits high yields with high nitrogen use efficiency in a paddy field from 2016 to 2019
D. K. Yoon, Keiki Ishiyama, Suganami Mao, Kagawa Takaaki +9 more
20201 citations
Semantic Scholar
Tissue and Cellular Localization of NADH-Dependent Glutamate Synthase Protein in Leaves of Spinach
T. Hayakawa, Keiki Ishiyama, T. Yamaya
20071 citations
Semantic Scholar
Changes in the tissue-localization of NADH-dependent glutamate synthase protein following the addition of NH_4^+ in the root-tips of rice seedlings
Keiki Ishiyama, T. Hayakawa, K. T. Alyson, T. Yamaya
19971 citations
Semantic Scholar
Photosynthetic Enhancement, Lifespan Extension, and Leaf Area Enlargement in Flag Leaves Increased the Yield of Transgenic Rice Plants Overproducing Rubisco Under Sufficient N Fertilization
Marin Tanaka, Mamoru Keira, Dong-Kyung Yoon, T. Mae +3 more
2022Rice0 citations Open access
Semantic Scholar
of PGR5 enhances the electron sink downstream of photosystem
Youshi Tazoe, Noriko Ishikawa, T. Shikanai, Keiki Ishiyama +4 more
20200 citations
Semantic Scholar
Outgrowth of Rice Tillers Requires Availability of Glutamine in the Basal Portions of Shoots
Miwa Ohashi, Keiki Ishiyama, S. Kojima, N. Konishi +4 more
2018Rice0 citations Open access
Semantic Scholar

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