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Dry Weight Accumulation, Root Plasticity, and Stomatal Conductance in Rice (<i>Oryza sativa</i>L.) Varieties under Drought Stress and Re-Watering Conditions

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American Journal of Plant Sciences 2017年第12期8卷 3189-3206页

作者： Doan Cong Dien Takeo Yamakawa toshihiro Mochizuki Aung Zaw Htwe Laboratory of Plant Nutrition Graduate School of Bioresource and Bioenvironmental Sciences School of Agriculture Kyushu University Fukuoka Japan Laboratory of Plant Nutrition Division of Molecular Biosciences Department of Biosciences & Biotechnology Faculty of Agriculture Kyushu University Fukuoka Japan Agricultural Ecology Laboratory Division of Agronomy and Environmental Sciences Department of Agro-Environmental Sciences Faculty of Agriculture Kyushu University Fukuoka Japan

Drought is one of the main factors limiting rice (Oryza sativa L.) productivity and has become an increasingly severe problem in many regions worldwide. Establishing breeding programs to develop new drought-tolerant varieties requires an understanding of the effect of drought on rice plants and the mechanisms of drought tolerance in rice. We conducted a pot experiment to explore growth characteristics, root plasticity, and stomatal conductance in six rice varieties (DA8, Malagkit Pirurutong, Thierno Bande, Pate Blanc MN1, Kinandang Patong, and Moroberekan) in response to different drought stress and re-watering conditions. Drought stress significantly depressed plant growth, root size, and stomatal conductance in all experimental varieties. These negative effects depended on both the variety and the severity of the drought stress treatment. Under moderate drought stress (10 days after drought treatment), growth was less influenced in roots than in shoots. In contrast, there was an opposite trend under severe drought stress (15 days after drought treatment), with growth being more severely affected in roots than in shoots. Rice plants recovered from drought stress in terms of dry matter accumulation, root size, and stomatal conductance after re-watering;however, the recovery pattern differed among varieties. DA8 exhibited the highest dry weight accumulation and root size (root length, root surface area, root volume, fine root length, and thick root length) under well-watered, drought stress, and re-watering conditions. Kinandang Patong showed the highest recovery ability in dry matter accumulation, root length, root surface area, and stomatal conductance after re-watering. Malagkit Pirurutong expressed the poorest recovery ability in dry matter accumulation after re-watering. These three varieties might be selected for further experiments focusing on the mechanisms of drought tolerance and recovery ability in rice.

关键词： Drought Tolerance Recovery Ability Re-Watering Rice Root Morphology

Oxidative stress as a potential causal factor for autoimmune hemolytic anemia and systemic lupus erythematosus

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World Journal of Nephrology 2015年第2期4卷 213-222页

作者： Junichi Fujii toshihiro Kurahashi Tasuku Konno Takujiro Homma Yoshihito Iuchi Department of Biochemistry and Molecular Biology Graduate School of Medical ScienceYamagata University Department of Biological Chemistry Faculty of AgricultureYamaguchi University

The kidneys and the blood system mutually exert infuence in maintaining homeostasis in the body. Because the kidneys control erythropoiesis by producing erythropoietinand by supporting hematopoiesis, anemia is associated with kidney diseases. Anemia is the most prevalent genetic disorder, and it is caused by a deficiency of glucose 6-phosphate dehydrogenase （G6PD）, for which sulfhydryl oxidation due to an insufficient supply of NADPH is a likely direct cause. Elevated reactive oxygen species （ROS） result in the sulfhydryl oxidation and hence are another potential cause for anemia. ROS are elevated in red blood cells （RBCs） under superoxide dismutase （SOD1） defciency in C57BL/6 mice. SOD1 defcient miceexhibit characteristics similar to autoimmune hemolytic anemia （AIHA） and systemic lupus erythematosus （SLE） at the gerontic stage. An examination of AIHA-prone New Zealand Black （NZB） mice, which have normal SOD1 and G6PD genes, indicated that ROS levels in RBCs are originally high and further elevated during aging. Transgenic overexpression of human SOD1 in erythroid cells effectively suppresses ROS elevation and ameliorates AIHA symptoms such as elevated anti-RBC antibodies and premature death in NZB mice. These results support the hypothesis that names oxidative stress as a risk factor for AIHA and other autoimmune diseases such as SLE. Herein we discuss the association between oxidative stress and SLE pathogenesis based mainly on the genetic and phenotypic characteristics of NZB and New Zealand white mice and provide insight into the mechanism of SLE pathogenesis.

关键词： Autoimmune hemolytic anemia Systemic lupus erythematosus Red blood cells New Zealand black mice New Zealand white mice

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网络互穿结构复合材料的研究进展

功能材料 2002年第1期33卷 22-25页

作者：谢贤清张荻范同祥 toshihiro Okabe Takashi Hirose 上海交通大学金属基复合材料国家重点实验室上海200030 Industrial Research Institute of Aomori Prefecture

总结了国内外在网络互穿复合材料及其预制件的制备工艺方面的研究现状，并且指出了各种工艺的特点；评述了网络互穿结构复合材料组织的特征及其表征；着重介绍了网络互穿复合材料力学性能、热学性能和摩擦学性能等方面的研究成果。

关键词：复合材料网络互穿结构制备工艺组织特征性能特征

The Metabolic Response of Arabidopsis Roots to Oxidative Stress is Distinct from that of Heterotrophic Cells in Culture and Highlights a Complex Relationship between the Levels of Transcripts, Metabolites, and Flux

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Molecular Plant 2009年第3期2卷 390-406页

作者： Martin Lehmann Markus Schwarzlander toshihiro Obata Supaart Sirikantaramas Meike Burow Carl Erik Olsen Takayuki Tohge Mark D. Fricker Birger Lindberg Moiler Alisdair R. Fernie Lee J. Sweetlove Miriam Laxa Max-Planck Institute for Molecular Plant Physiology Am M0hlenberg 14476 Potsdam-Golm Germany Department of Plant Sciences University of Oxford South Parks Road Oxford OX1 3RB UK Plant Biochemistry Laboratory Department of Plant Biology and Biotechnology and VKR Research Centre for Pro-Active Plants University of Copenhagen 40 Thorvaldsensvei DK-1871 Frederiksberg C Copenhagen Denmark

Metabolic adjustments are a significant, but poorly understood, part of the response of plants to oxidative stress. In a previous study （Baxter et al., 2007）, the metabolic response of Arabidopsis cells in culture to induction of oxidative stress by menadione was characterized. An emergency survival strategy was uncovered in which anabolic primary metabolism was largely down-regulated in favour of catabolic and antioxidant metabolism. The response in whole plant tissues may be different and we have therefore investigated the response of Arabidopsis roots to menadione treatment, analyzing the transcriptome, metabolome and key metabolic fluxes with focus on primary as well as secondary metabolism. Using a redox-sensitive GFP, it was also shown that menadione causes redox perturbation, not just in the mitochondrion, but also in the cytosol and plastids of roots. In the first 30 min of treatment, the response was similar to the cell culture： there was a decrease in metabolites of the TCA cycle and amino acid biosynthesis and the transcriptomic response was dominated by up-regulation of DNA regulatory proteins. After 2 and 6 h of treatment, the response of the roots was different to the cell culture. Metabolite levels did not remain depressed, but instead recovered and, in the case of pyruvate, some amino acids and aliphatic glucosinolates showed a steady increase above control levels. However, no major changes in fluxes of central carbon metabolism were observed and metabolic transcripts changed largely independently of the corresponding metabolites. Together, the results suggest that root tissues can recover metabolic activity after oxidative inhibition and highlight potentially important roles for glycolysis and the oxidative pentose phosphate pathway.

关键词： Carbon metabolism oxidative and photo oxidative stress secondary metabolism phenylpropanoids and phenolics root biology Arabidopsis.

Long-term lamivudine treatment for chronic,hepatitis B in Japanese patients:A project of Kyushu University Liver Disease Study

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World Journal of Gastroenterology 2006年第4期12卷 561-567页

作者： Norihiro Furusyo Hiroaki Takeoka Kazuhiro Toyoda Masayuki Murata Yuichi Tanabe Eiji Kajiwara Junya Shimono Akihide Masumoto toshihiro Maruyama Hideyuki Nomura Makoto Nakamuta Kazuhiro Takahashi Shinji Shimoda Koichi Azuma Hironori Sakai Jun Hayashi Department of General Medicine Kyushu University Hospital Department of Environmental Medicine and Infectious Diseases Graduate School of Medical Sciences. Kyushu University Fukuoka Japan Department of Medicine Fukuoka City HospitalFukuoka Japan Department of Internal Medicine Nippon SteelYawata Memorial Hospital Kitakyushu Japan Department of Medicine Yahata SaiseikaiHospital Kitakyushu Japan Department of Clinical Research NationalHospital Organization Kokura Hospital Kitakyushu Japan Department of Medicine KitakyushuMunicipal Medical Center Kitakyushu Japan Department of Internal Medicine ShinKokura Hospital Kitakyushu Japan Department of Medicine and Bioregulatory Science Graduate School of Medical Sciences Kyushu University Fukuoka Japan Department of Medicine HamanomachiHospital Fukuoka Japan Department of Medicine and Biosystemic Science Graduate School of Medical Sciences Kyushu University Fukuoka Japan Department of Medicine and Clinical Science Graduate School of Medical Sciences Kyushu University Fukuoka Japan Department of Gastroenterology National Hospital Organization Kyushu Medical Center Fukuoka Japan

AIM： To determine the efficacy of long-term lamivudine treatment of a large number of Japanese patients with chronic hepatitis B. METHODS： In this retrospective, multi-center trial, 318 Japanese patients with chronic hepatitis B received 100 mg of lamivudine daily for up to 36 （median 21） mo. Virological response was a decline to a serum HBV DNA level less than 3.7 log copies/mL. Virological breakthrough was defined as the reappearance of a serum HBV DNA level to more than 10-fold the minimum during treatment. RESULTS： Lamivudine produced virological response in 86.8% of the 318 patients at 6 mo, in 80.2% of 252 patients at 12 mo, in 69.2% of 133 patients at 24 mo, and in 53.6% of 28 patients at 36 mo. Forward stepwise logistic regression analysis showed an HBV DNA level less than 6.8 log copies/mL （P〈 0.0001）, HBeAg negativity （P〈 0.0001）, a platelet count of 100×10^9/L or more （P= 0.0162） at baseline, and a decline of the HBV DNA level of more than 3.2 log copies/mL as compared with the baseline level at 3 mo after the start of treatment （P= 0.0003） to be significantly associated with virological response. Among patients with a virological response, virological breakthrough was seen in 5.3% of 19 patients who responded virologically at 1 mo, in 20.7% of 203 patients at 3 mo, in 27.5% of 51 patients at 6 mo, in 33.3% of 12 patients at 9 mo, and in 100% of 3 patients at ≥15 mo. A virological breakthrough was found significantly more often in patients with delayed virological response. CONCLUSION： Lamivudine treatment could suppress serum HBV DNA in most of the tested Japanese patients. Long-term efficacy might be seen in patients without HBeAg at baseline, in the absence of cirrhosis, and in patients with a decline in HBV DNA level soon after the start of treatment.

关键词： Hepatitis B virus Lamivudine HBeAg Cirrhosis

RNA-binding Domain of the Key Structural Protein P7 for the Rice dwarf virus Particle Assembly

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Acta Biochimica et Biophysica Sinica 2005年第1期37卷 55-60页

作者： Bo-Xiong ZHONG~(1,2*) Yan-Wei SHEN~1 toshihiro OMURA~2 ~1 Department of Bioresource Science.College of Animal Science,Zhejiang University,Hangzhou 310029,China ~2National Agricultural Research Center,Tsukuba.Ibaraki 305,Japan Department of Bioresource Science College of Animal Science Zhejiang UniversityHangzhou 310029 China National Agricultural Research CenterTsukuba Ibaraki 305 Japan

The Rice dwarf virus(RDV)P7 structural protein is the key protein in the RDV *** P7 protein was digested partially or completely by Staphylococcus aureus V8 protease and/orPseudomonas fragi Asp-N *** molecular mass and the N-terminal amino acid sequence of thepolypeptide fragments of the P7 protein were determined by SDS-PAGE and the Edman degradation method,*** the polypeptides were located in the deduced amino acid sequence of the RDV P7 proteinbased on the nucleotide sequence information,with the knowledge of the specific cleavage sites of theStaphylococcus aureus V8 and Pseudomonas fragi Asp-N protease,and the two RNA-binding domains in theP7 protein were *** 1 was located in the residue 128-249 containing 122 amino acids anddomain 2 was located in the residue 325-355 containing 31 amino ***,these two domains may playan important role in the virus particle assembly by contributing to the packaging of viral dsRNAs inside *** two domains may be novel RNA-binding domains,because no amino acid sequences highlysimilar to the conservative sequences of known dsRNA-binding domains reported so *** similaritybetween the motif of domain 1 and the motif of the DNA-binding protein suggests that the DNA-bindingactivity of the RDV P7 protein may be due to this *** similarity between the motif of domain 1 andthe motif of the RNA polymerase domain suggests that the P7 protein may also play a role in RNA synthesis,besides its function in the assembly and subsequent packaging of viral dsRNA into core particles.

关键词： RDV RNA-binding protein protein functional domain virion assembly RNA polymerase

Cerebral aneurysms and inflammation

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Neuroimmunology and Neuroinflammation 2015年第1期2卷 55-58页

作者： toshihiro Yokoi Makoto Saito Yayoi Yoshimura Keiichi Tsuji Kazuhiko Nozaki Department of Neurosurgery Shiga University of Medical ScienceShiga 520-2192Japan

Multiple inflammatory factors,playing a crucial role in cerebral aneurysm formation,have been *** necrosis factor‑alpha(TNF‑α)has been revealed to have a close connection with several risk factors that affect aneurysm *** expression in aneurysm walls of mRNA for TNF‑αhas been observed in *** therapeutic interventions to reduce the formation of cerebral aneurysms may include the inhibition of mediators of inflammation.

关键词： Cerebral aneurysm inflammation molecular biology

Photovoltaic properties of Cu_2O-based heterojunction solar cells using n-type oxide semiconductor nano thin films prepared by low damage magnetron sputtering method

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Journal of Semiconductors 2019年第3期40卷 29-32页

作者： toshihiro Miyata Kyosuke Watanabe Hiroki Tokunaga Tadatsugu Minami Optoelectronic Device System R&D Center Kanazawa Institute of Technology

We improved the photovoltaic properties of Cu_2O-based heterojunction solar cells using n-type oxide semiconductor thin films prepared by a sputtering apparatus with our newly developed multi-chamber system. We also obtained the highest efficiency(3.21%) in an AZO/p-Cu_2O heterojunction solar cell prepared with optimized pre-sputtering conditions using our newly developed multi-chamber sputtering system. This value achieves the same or higher characteristics than AZO/Cu_2O solar cells with a similar structure prepared by the pulse laser deposition method.

关键词： Cu2O AZO solar cell oxide thin film magnetron sputtering

Preparetion of Cu(In,Ga)(S,Se)2 Thin Films by Thermal Crystallization from CuInGaSe/CuGaSe Precursors in Sulfur and Selenium Atmosphere

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Preparetion of Cu(In,Ga)(S,Se)2 Thin Films by Thermal Crysta...