- 著者
- Masato Nakamura Mamoru Nozaki Yuji Iwata Nozomu Koizumi Yasushi Sato
- 出版者
- Japanese Society for Plant Biotechnology
- 雑誌
- Plant Biotechnology (ISSN:13424580)
- 巻号頁・発行日
- vol.39, no.2, pp.129-138, 2022-06-25 (Released:2022-06-25)
- 参考文献数
- 48
- 被引用文献数
- 2
Endoplasmic reticulum (ER) stress activates unfolded protein responses (UPRs), such as promoting protein folding under the control of specific gene expression. Our previous study showed that ER stress induced by ER stress inducers such as tunicamycin (Tm), an inhibitor of N-linked glycan synthesis, causes ectopic lignin deposition in Arabidopsis roots, but the relationship between UPR and ectopic lignin deposition remains unclear. The receptor-like kinase THESEUS1 (THE1) has been shown to sense cell wall damage (CWD) induced in Arabidopsis by cellulose synthase inhibitors such as isoxaben (ISO) and to activate ectopic lignin deposition. In this study, we assessed the involvement of THE1 in ectopic lignin deposition caused by the ER stress inducer Tm. The loss-of-function mutation of THE1, the1-3, suppressed Tm-induced root growth inhibition and ectopic lignin deposition, revealing that THE1 is involved in root growth defects and ectopic lignin deposition caused by ER stress. Similarly, ISO treatment induced ectopic lignin deposition as well as the expression of the UPR marker genes binding protein 3 (BiP3) and ER-localized DnaJ 3b (ERdj3b). Conversely, in the the1-3 mutant, ISO-induced ectopic lignin deposition and the expression of BiP3 and ERdj3b were suppressed. These results showed that THE1 is involved in not only root growth inhibition and ectopic lignin deposition caused by ER stress but also CWD-induced UPR.
- 著者
- Yasushi SATO Chihiro KUMASHIRO Kokoro OKIMOTO Koji TOMITA Masato KAKIHANA
- 出版者
- The Ceramic Society of Japan
- 雑誌
- Journal of the Ceramic Society of Japan (ISSN:18820743)
- 巻号頁・発行日
- vol.130, no.1, pp.49-54, 2022-01-01 (Released:2022-01-01)
- 参考文献数
- 37
- 被引用文献数
- 2
Eu2+-activated Ca3MgSi2O8 (Ca3MgSi2O8:Eu2+) phosphors were successfully synthesized by an amorphous metal complex method using propylene glycol-modified silane (PGMS) and heat-treatment under a reduced atmosphere at 1400 °C. The photoluminescence (PL) of Ca3MgSi2O8:Eu2+ was studied as a function of total Eu concentration. Furthermore, Ca3MgSi2O8 with Eu2+ concentrations at 1.0–30 % for Ca exhibited a blue-green emission peaking at approximately 480 nm. In contrast, with increasing Eu2+ concentration up to 50 % for Ca, the emission peak of Ca3MgSi2O8:Eu2+ phosphors exhibited a redshift to 521 nm with green emissions. The redshift of emissions in Ca3MgSi2O8:Eu2+ phosphors could be attributed to the strong electrostatic interactions related to the Eu2+ ions occupying the peculiar Ca sites.
- 著者
- Yuto NAKAMURA Yasushi SATO Naoki SHIDA Mahito ATOBE
- 出版者
- The Electrochemical Society of Japan
- 雑誌
- Electrochemistry (ISSN:13443542)
- 巻号頁・発行日
- pp.21-00053, (Released:2021-05-12)
- 参考文献数
- 27
- 被引用文献数
- 1
In this study, we report one step electrochemical trimerization of catechol to 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) for the first time. Electrochemical trimerization was demonstrated in a flow microreactor, which offers advantages for reaction screening owing to short reaction time and small reaction scale, as well as avoiding the further oxidation of HHTP. The use of 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) as a solvent was essential for the efficient production of HHTP. Computational simulation, pKa calculation, and electrochemical measurements gave some important insights into the mechanism of the electrochemical oxidation of catechol in HFIP.