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Leaf Positioning of Arabidopsis in Response to Blue Light

Molecular Plant 2008年第1期1卷 15-26页

作者： Shin-ichiro Inoue Toshinori Kinoshit Atsushi Takemiya Michio Doi ken-ichiro shimazaki Department of Biology Faculty of Science Kyushu University Ropponmatsu Fukuoka 810-8560 Japan Research and Development Center for Higher Education Kyushu University Ropponmatsu Fukuoka 810-8560 Japan

Appropriate leaf positioning is essential for optimizing photosynthesis and plant growth. However, it has not been elucidated how green leaves reach and maintain their position for capturing light. We show here the regulation of leaf positioning under blue light stimuli. When 1-week-old Arabidopsis seedlings grown under white light were transferred to red light （25 i, mol m^-2 s^-1） for 5 d, new petioles that appeared were almost horizontal and their leaves were curled and slanted downward. However, when a weak blue light from above （0.1 i, mol m^-2 s^-1） was superimposed on red light, the new petioles grew obliquely upward and the leaves were flat and horizontal. The leaf positioning required both phototropinl （photl） and nonphototropic hypocotyl 3 （NPH3）, and resulted in enhanced plant growth. In an nph3 mutant, neither optimal leaf positioning nor leaf flattening by blue light was found, and blue light-induced growth enhancement was drastically reduced. When blue light was increased from 0.1 to 5 i, mol m^-2 s^-1, normal leaf positioning and leaf flattening were induced in both photl and nph3 mutants, suggesting that phot2 signaling became functional and that the signaling was independent of photl and NPH3 in these responses. When plants were irradiated with blue light （0.1 i, mol m^-2 s^- 1） from the side and red light from above, the new leaves became oriented toward the source of blue light. When we transferred these plants to both blue light and red light from above, the leaf surface changed its orientation to the new blue light source within a few hours, whereas the petioles initially were unchanged but then gradually rotated, suggesting the plasticity of leaf positioning in response to blue light. We showed the tissue expression of NPH3 and its plasma membrane localization via the coiled-coil domain and the C-terminal region. We conclude that NPH3-mediated phototropin signaling optimizes the efficiency of light perception by inducing both optimal leaf posit

关键词： Leaf Positioning of Arabidopsis Response Blue Light

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Blue-light-induced rapid chloroplast de-anchoring in Vallisneria epidermal cells

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Journal of Integrative Plant Biology 2015年第1期57卷 93-105页

作者： Yuuki Sakai Shin-ichiro Inoue Akiko Harada ken-ichiro shimazaki Shingo Takagi Department of Biological Sciences Graduate School of Science Osaka University Division of Biological Science Graduate School of Science Nagoya University Department of Biology Osaka Medical College Department of Biology Faculty of Science Kyushu University

In the outer periclinal cytoplasm of leaf epidermal cells of an aquatic angiosperm Vallisneria, blue light induces ＂chloroplast de-anchoring＂, a rapid decline in the resistance of chloroplasts against centrifugal force. Chloroplast de- anchoring is known induced within lmin of irradiation with high-fluence-rate blue light specifically, preceding the com- mencement of chloroplasts migration toward the anticlinal cytoplasm. However, its regulatory mechanism has remained elusive, although pharmacological analysis suggested that a calcium release from intracellular calcium stores is necessary for the response, in search of the responsible photoreceptors, immunoblotting analysis using antibodies against phototropins demonstrated that cross-reactive polypeptides of 120-kDa exist in the plasma-membrane fraction prepared from the leaves. In vitro phosphorylation analysis revealed that 120-kDa polypeptides were phosphorylated by exposure to blue light in a fluence-dependent manner. The blue-light-induced phosphorylation activity was sensitive to a Ser/Thr kinase inhibitor, staurosporine, and unusually was retained at a high level for a long time in darkness. Furthermore, phototropin gene homologs （Vallisneria PHOTOTROPINI and PHOTOTROPIN2） expressed in leaves were isolated. We propose that calcium- regulated chloroplast de-anchoring, possibly mediated by phototropins, is an initial process of the blue-light-induced avoidance response of chloroplasts in Vallisneria.

关键词： Avoidance response of chloroplasts blue-light response chloroplast de-anchoring cytoplasmic calcium phototropin

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Nitric oxide inhibits blue light-dependent stomatal opening via a subset of abscisic acid signaling pathways in Vicia guard cells

Nitric oxide inhibits blue light-dependent stomatal opening ...

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2007中国植物生理学会全国学术会议

作者：张骁 Atsushi Takemiya Toshinori Kinoshita ken-ichiro shimazaki 河南大学生命科学学院河南省植物逆境生物学重点实验室 Department of Biology Faculty of Science Kyushu University Ropponmatsu Fukuoka 810-8560 Japan

Stomatal closing to abscisic acid(ABA)and stomatal opening to light stimuli comprise two main aspects of stomatal ***,evidence increasingly points that nitric oxide(NO),as the same as HO,is a prerequisite for ABA signal transduction in guard cells,although its situation within any one signal cascade is still poorly *** this study,we investigated this effect of sodium nitroprusside(SNP),a NO donor,on both stomatal pore size under different actinic light conditions and blue light(BL)-dependent H+

关键词： Abscisic acid Blue light H+ pumping Nitric oxide

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一氧化氮抑制蓝光诱导的气孔开放机制分析

一氧化氮抑制蓝光诱导的气孔开放机制分析

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中国细胞生物学学会2005年学术大会、青年学术研讨会

作者：张骁 ken-ichiro shimazaki 河南大学生命科学学院植物逆境生物学实验室 Department of Biology Faculty of Sciences Fukuoka 810-8560 Japan

气孔张开的分子机理研究是植物光形态建成反应的重要方面。气孔对光的反应可分为红光介导的光合作用和蓝光诱导的信号转导途径。研究表明,蓝光可通过激活保卫细胞质膜上的H+泵,改变膜电位,导致相关离子通道的活性变化等,从而诱导气孔开... 详细信息

气孔张开的分子机理研究是植物光形态建成反应的重要方面。气孔对光的反应可分为红光介导的光合作用和蓝光诱导的信号转导途径。研究表明,蓝光可通过激活保卫细胞质膜上的H+泵,改变膜电位,导致相关离子通道的活性变化等,从而诱导气孔开放。而逆境信号一氧化氮(NO)可促进气孔关闭以减少植物体内水分的散失,从而增强植物的耐旱性。考虑到诱导植物产生NO的各种逆境通常是在白天发生的,因此,综合研究NO和蓝光信号在气孔运动中的互作机制,将会为人们深入认识植物的逆境适应特性提供更多的信息。

关键词：气孔开放光诱导 ATPase 细胞质膜一氧化氮

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Inhibition of blue-light- dependent binding of 14-3-3 proteins to phototropins by hydrogen peroxide

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Science Bulletin 2005年第11期50卷 1166-1168页

作者： shimazaki ken-ichiro Faculty of Sciences Department of Biology Japan Fu- kuoka 810-8560 Kyushu University

Examines the inhibition of blue-light (BL)dependent 14-3-3 protein binding to phototropins by hydrogen peroxide. Function of phototropins, a BL receptor in plants; Mechanisms of BL signaling; Site of hydrogen peroxide... 详细信息

关键词： dependent binding of 14-3-3 proteins to phototropins by hydrogen peroxide blue

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Fantastic Histories： The Battles of Coxinga and the Preservation of Ming in Japan

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2015年第1期9卷 17-53页

作者： Satoko shimazaki Department of East Asian Languages and Cultures University of Southern California LosAngeles CA 90089 USA

People in Japan reacted to the bewilderment they felt at the fall of Ming by creating a bifurcated view of China, evident in encyclopedias and gazeteers： On the one hand, there was the traditional China represented by the Ming; on the other, there was the new China ruled by the Dattan or the Tatars. Such was the power of the Ming as an image that it endured in Japanese literature and theater for centuries after its fall. This article explores the preservation in popular discourse of the Ming as the most natural representation of China, focusing on Chikamatsu Monzaemon＇s hit jrruri play The Battles of Coxinga （Kokusen＇ya kassen）, first staged in 1715 and produced many times after that, showing how the political turmoil was filtered through both misunderstandings and creative fabrications. It shows that The Battles of Coxinga creates a fantastic image of China, as opposed to the barbaric Dattan, by drawing on historical memories internal to Japan and readily available images of foreignness. I argue that the preservation of the Ming in popular theater offered audiences a means of rethinking Japan＇s position as the inheritor of a ＂universal＂ Chinese essence in an age when knowledge of the world was being dramatically expanded by imported European cartography, complicating earlier views of a world centered on the Three Realms or the Sinocentric world order.

关键词： fall of the Ming Chikamatsu Monzaemon The Battles of Coxinga(Kokusen 'ya kassen) Nishikawa Joken Japanese views of China

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Edo kabuki in transition

Edo kabuki in transition

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作者： shimazaki Satoko

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Engineered three-dimensional rabbit oral epithelial–mesenchymal–muscular hybrid sheets

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International Journal of Oral Science 2016年第3期8卷 145-154页

作者： Shigeki Yamane Kazunari Higa Takashi Umezawa Masamitsu Serikawa Jun shimazaki Shinichi Abe Department of Anatomy Tokyo Dental College Tokyo Japan Department of Ophthalmology/Cornea Center Tokyo Dental College Chiba Japan

Regenerative muscles are required for swallowing and mastication, and are important for functional recovery from diseases involving oral muscular defects. Therefore, we generated three-layer hybrid sheets, similar to oral mucosal structures containing submucosal muscles, using rabbit oral mucosa epithelial, mesenchymal, and myoblastic progenitor cells, and examined the structural proteins. Each cell type was obtained from rabbit oral mucosa using enzymatic digestion. Isolated mesenchymal and myoblastic cells were multi-differentiated into osteoblasts, adipocytes, and chondrocytes or myotubes. Isolated epithelial cells were cultured on collagen gels containing isolated mesenchymal cells for 2 weeks, and these epithelial-mesenchymal cell sheets were laminated onto myoblastic cell sheets. The engineered hybrid sheets were multi-stratified in the epithelial and myoblastic layers in a time-dependent manner, expressing intermediate cytoskeletal filament proteins of epithelium and muscle. Hybrid sheets also expressed extracellular matrix basement membrane proteins. Immature cell markers for epithelial and myoblastic cells were observed continuously in hybrid sheet cultures. We established engineered three-dimensional rabbit oral mucosa hybrid sheets containing each immature cell type in vitro.

关键词： mesenchymal stem cell multi-differentiation myoblast oral mucosa three-dimensional culture

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Recent Advances in X-Ray Structures of Metal-Phenoxyl Radical Complexes

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Advances in Materials Physics and Chemistry 2013年第1期3卷 60-71页

作者： Yuichi shimazaki College of Science Ibaraki University Mito Japan

An “experimental” valence state of metal complexes is sometime different from the “formal” oxidation state, especially in the species having redox active ligands. This difference can be seen in biological system, such as iron(IV)-porphyrin π-cation radical in some heme proteins and copper(II)-phenoxyl radical in galactose oxidase (GO). Although structural characterizations of these species by X-ray diffraction methods have been rare due to their stability, some artificial metal-phenoxyl radical complexes have been synthesized and successfully characterized by X-ray crystal structure. In this review, syntheses and X-ray crystal structures of the one-electron oxidized metal-phenolate complexes, metal- phenoxyl radical, and high-valent metal phenolate species are discussed.

关键词： Phenoxyl Radical Metal Complexes Oxidation Valence State Crystal Structure Electronic Structure Reactivity

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Oxygen Isotopic Characteristics of Granitic Intrusions Related to Haobugao Zn-Pb-Cu-Sn Skarn Deposit,East Inner Mongolia,China

Oxygen Isotopic Characteristics of Granitic Intrusions Relat...

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中国科学院地质与地球物理研究所2004学术年会

作者： Hidehiko shimazaki 23-9 Tokiwadaira-Nishikubo Matsudo 270-2266Japan

Granitic rocks related to the formation of Haobugao Zn-Pb-Cu-Sn skarn deposit,Inner Mongolia,China,show unusual low whole-rockδO values down to -8.8‰(V-SMOW),whereas separated quartz crystals from those rocks give positiveδO values of +4.1 to +9.9‰.Chemical analyses and microscopic observation of those granitic rocks confirm that they suffered hydrothermal *** skarn specimens and quartz from the Haobugao deposit also show negativeδO *** isotopic evidence indicates that intensive meteoric water circulation occurred at the time of granitic intrusion, and caused the pervasive hydrothermal alteration of granitic rocks and the precipitation of skarn deposit in this area.

关键词： Haobugao Zn-Pb-Cu-Sn skarn deposit Baiyinnuo Zn-Pb-Cu(-Sn) skarn deposit alkali granite oxygen isotopes meteoric water Inner Mongolia

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