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819 results on '"Abe, Akira"'

308. The tillering phenotype of the rice plastid terminal oxidase ( PTOX) loss-of-function mutant is associated with strigolactone deficiency.

Author

Tamiru, Muluneh, Abe, Akira, Utsushi, Hiroe, Yoshida, Kakoto, Takagi, Hiroki, Fujisaki, Koki, Undan, Jerwin R., Rakshit, Sujay, Takaichi, Shinichi, Jikumaru, Yusuke, Yokota, Takao, Terry, Matthew J., and Terauchi, Ryohei

Subjects
*PLASTIDS, *PHYTOENE desaturase, *CHLOROPLASTS, *ARABIDOPSIS, *MONOCOTYLEDONS, *CAROTENOIDS, *PHENOTYPES
Abstract

The significance of plastid terminal oxidase ( PTOX) in phytoene desaturation and chloroplast function has been demonstrated using PTOX-deficient mutants, particularly in Arabidopsis. However, studies on its role in monocots are lacking. Here, we report cloning and characterization of the rice ( Oryza sativa) PTOX1 gene., Using Ecotype Targeting Induced Local Lesions IN Genomes (Eco TILLING) and TILLING as forward genetic tools, we identified the causative mutation of an EMS mutant characterized by excessive tillering, semi-dwarfism and leaf variegation that corresponded to the PTOX1 gene., The tillering and semi-dwarf phenotypes of the ptox1 mutant are similar to phenotypes of known strigolactone ( SL)-related rice mutants, and both phenotypic traits could be rescued by application of the synthetic SL GR24. The ptox1 mutant accumulated phytoene in white leaf sectors with a corresponding deficiency in β-carotene, consistent with the expected function of PTOX1 in promoting phytoene desaturase activity. There was also no accumulation of the carotenoid-derived SL ent-2′- epi-5-deoxystrigol in root exudates. Elevated concentrations of auxin were detected in the mutant, supporting previous observations that SL interaction with auxin is important in shoot branching control., Our results demonstrate that PTOX1 is required for both carotenoid and SL synthesis resulting in SL-deficient phenotypes in rice. [ABSTRACT FROM AUTHOR]

Published
2014
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309. Increase of lysosomal phospholipase A2 in aqueous humor by uveitis.

Author

Hiraoka, Miki, Abe, Akira, Lennikov, Anton, Kitaichi, Nobuyoshi, Ishida, Susumu, and Ohguro, Hiroshi

Subjects
*PHOSPHOLIPASE A2, *LYSOSOMES, *AQUEOUS humor, *UVEITIS, *ENDOTOXINS, *EYE inflammation
Abstract

Abstract: This study was conducted to elucidate pathophysiological roles of the lysosomal phospholipase A2 (LPLA2), a phospholipid-degrading enzyme, of the aqueous humor (AH) in uveitis using an animal model and clinical specimens. Endotoxin-induced uveitis (EIU) was induced by subcutaneous injections of lipopolysaccharide from Escherichia coli to seven-week-old male Lewis rats. Inflammation of the anterior chamber (AC) was evaluated by measurement of the protein concentration of rat AH. The LPLA2 activity in the AH, serum and cerebrospinal fluid obtained from EIU rats was detected using liposomes consisting of 1,2-dioleoylphosphatidylglycerol/N-acetylsphingosine as the substrate under acidic conditions. Immunohistochemical analysis was performed using antibodies against CD11b and LPLA2. Sixty-five human AH specimens, in which 11 eyes had a history of chronic uveitis, were collected during patient cataract surgeries and used to determine LPLA2 activity. The LPLA2 activity in rat AH was significantly increased by EIU induction, and was correlated to the extent of inflammation in the AC. By contrast, the LPLA2 activity in rat serum or cerebrospinal fluid was not influenced by EIU induction. According to the immunohistochemistry, LPLA2 was found in CD11b positive cells in the AC of the EIU rats. In the clinical specimens, the AH obtained from the patients with a history of uveitis possessed significantly higher LPLA2 activity than that from the senile patients with cataract but without other ocular diseases. These results demonstrate that the LPLA2 activity in the AH is augmented with the inflammation in the AC and suggest that the LPLA2 in the AH participates in the inflammation process in the AC. [Copyright &y& Elsevier]

Published
2014
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329. Direct measurements of ion distribution function in loss cones and plasma potential in the tandem mirror (oral)

Author

Ishii, Kameo, primary, Takahashi, Toshiki, additional, Abe, Akira, additional, Kikuno, Nagayoshi, additional, Goto, Tetsuya, additional, ~:atsuki, Yuzo, additional, Katanuma, Isao, additional, Itakura, Akiyosi, additional, Ichimura, Makoto, additional, Kiwamoto, Yosuhito, additional, Yatsu, Kiyoshi, additional, and Tamano, Teruo, additional

Published
1997
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335. Gain Curves of a Microchannel Plate Ion Detector for Measurement of End-Loss Ions in the Tandem Mirror

Author

Tetsuya Goto, Tetsuya Goto, primary, Kameo Ishii, Kameo Ishii, additional, Toshiki Takahashi, Toshiki Takahashi, additional, Akira Abe, Akira Abe, additional, Yuzo Katsuki, Yuzo Katsuki, additional, Nagayoshi Kikuno, Nagayoshi Kikuno, additional, Yasuhiro Goi, Yasuhiro Goi, additional, Yoshihiro Ono, Yoshihiro Ono, additional, Nobutsugu Ishibashi, Nobutsugu Ishibashi, additional, Yousuke Nakashima, Yousuke Nakashima, additional, Kiyoshi Yatsu, Kiyoshi Yatsu, additional, and Teruo Tamano, Teruo Tamano, additional

Published
1996
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340. Relationships of Dietary and Ruminal Characteristics to Carcass Traits in Wagyu Steers

Author

NARUSE, Misako, primary, MORITA, Hiroshi, additional, HASHIBA, Kenjiro, additional, KAJIKAWA, Hiroshi, additional, AMARI, Masahiro, additional, MASAKI, Shigehiko, additional, OZUTSUMI, Kyouhei, additional, ABE, Akira, additional, MARUYAMA, Shin, additional, MORIMOTO, Hisashi, additional, MIURA, Yasuhiro, additional, FUJITA, Kou, additional, and FUKE, Takeo, additional

Published
1996
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