M
Masaji Koshioka
Researcher at Nihon University
Publications - 144
Citations - 3693
Masaji Koshioka is an academic researcher from Nihon University. The author has contributed to research in topics: Gibberellin & Matthiola incana. The author has an hindex of 27, co-authored 144 publications receiving 3390 citations. Previous affiliations of Masaji Koshioka include University of Calgary & Teikyo University.
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Journal ArticleDOI
slender Rice, a Constitutive Gibberellin Response Mutant, Is Caused by a Null Mutation of the SLR1 Gene, an Ortholog of the Height-Regulating Gene GAI/RGA/RHT/D8
Akira Ikeda,Miyako Ueguchi-Tanaka,Yutaka Sonoda,Hidemi Kitano,Masaji Koshioka,Yuzo Futsuhara,Makoto Matsuoka,Junji Yamaguchi +7 more
TL;DR: The rice slender mutant (slr1-1) is caused by a loss-of-function mutation of the SLR1 gene, which is an ortholog of GAI, RGA, RHT, and D8, and succeeded in producing GA-insensitive dwarf rice by transforming wild-type rice with a modified SLR 1 gene construct that has a 17–amino acid deletion affecting the DELLA region.
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Phenolic antioxidants from the leaves of Corchorus olitorius L.
Keiko Azuma,Masayoshi Nakayama,Masaji Koshioka,Katsunari Ippoushi,Yuichi Yamaguchi,Katsunari Kohata,Yuji Yamauchi,Hidekazu Ito,Hisao Higashio +8 more
TL;DR: Six phenolic antioxidative compounds were identified from the leaves of Corchorus olitorius L. (moroheiya) by NMR and FAB-MS and showed that 5-caffeoylquinic acid was a predominant phenolic antioxidant in C. Olitorius leaves.
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The Involvement of Gibberellin 20-Oxidase Genes in Phytochrome-Regulated Petiole Elongation of Arabidopsis
TL;DR: It is shown that enhancement of petiole elongation by a far-red (FR)-rich LD is mimicked by a brief end-of-day (EOD) FR exposure in short day (SD), and Circadian entrainment to a daytime pattern provides an explanation for the SD expression of AtGA20ox1.
Journal Article
Slender rice, a constitutive gibberellin response mutant
Akira Ikeda,Ueguchi-Tanaka Miyako,Hidemi Kitano,Masaji Koshioka,Yuzo Futsuhara,Makoto Matsuoka,Junji Yamaguchi +6 more
Journal ArticleDOI
A role of OsGA20ox1, encoding an isoform of gibberellin 20-oxidase, for regulation of plant stature in rice
Tetsuo Oikawa,Masaji Koshioka,Kiyohide Kojima,Hitoshi Yoshida,Motoshige Kawata,Motoshige Kawata +5 more
TL;DR: Analysis of mRNA and the endogenous GAs reveal that biologically active GA level is increased by up-regulation of the OsGA20ox1 gene in B142, a novel tall mutant of rice distinct from GA signaling mutants such as slr1.