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Journal of Plant Diseases and Protection - The antagonistic rhizobacterium, Pseudomonas fluorescens strain LRB3W1, controls cabbage Fusarium yellows caused by Fusarium oxysporum f. sp. conglutinans... 相似文献
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Sekitani T Noguchi Y Hata K Fukushima T Aida T Someya T 《Science (New York, N.Y.)》2008,321(5895):1468-1472
By using an ionic liquid of 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, we uniformly dispersed single-walled carbon nanotubes (SWNTs) as chemically stable dopants in a vinylidene fluoride-hexafluoropropylene copolymer matrix to form a composite film. We found that the SWNT content can be increased up to 20 weight percent without reducing the mechanical flexibility or softness of the copolymer. The SWNT composite film was coated with dimethyl-siloxane-based rubber, which exhibited a conductivity of 57 siemens per centimeter and a stretchability of 134%. Further, the elastic conductor was integrated with printed organic transistors to fabricate a rubberlike active matrix with an effective area of 20 by 20 square centimeters. The active matrix sheet can be uniaxially and biaxially stretched by 70% without mechanical or electrical damage. The elastic conductor allows for the construction of electronic integrated circuits, which can be mounted anywhere, including arbitrary curved surfaces and movable parts, such as the joints of a robot's arm. 相似文献
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Nobutaka?Someya Masami?Nakajima Ken?Watanabe Tadaaki?Hibi Katsumi?AkutsuEmail author 《Journal of General Plant Pathology》2003,69(5):342-347
Serratia marcescens strain B2 is an antagonistic bacterium that produces the red-pigmented antibiotic prodigiosin and suppresses rice sheath blight caused by Rhizoctonia solani AG-1 IA. Rice sheath blight disease was suppressed when plants were inoculated with this bacterium an hour before pathogen inoculation but not when plants were treated 4 weeks before pathogen inoculation. In both cases the bacteria were detected in the rice rhizosphere 4 weeks after inoculation. Bacteria isolated from the rice plant and rhizosphere inhibited biosynthesis of prodigiosin in S. marcescens strain B2. We suggest that bacteria isolated from rice plants and rhizospheres mediate the suppression of antibiotic production of biological control agents and that such suppression is common under field conditions. 相似文献
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Nobutaka Someya Shinichi Numata Masami Nakajima Akira Hasebe Katsumi Akutsu 《Journal of General Plant Pathology》2004,70(6):371-375
Chitinolytic activity of the biocontrol bacterium Serratia marcescens strain B2 was inhibited by bacteria isolated from rice, even though its growth was not affected. Antifungal activity of the strain against Pyricularia oryzae was also reduced under the influence of these bacteria. In contrast, the rice-epiphytic bacterium Erwinia ananas NR1, transformed with chitinase gene chiA derived from strain B2, had high chitinolytic activity regardless of the presence of the bacteria isolated from rice. Therefore, the introduction of an antagonistic factor gene with a promoter from the recipient into the epiphytic bacteria may prove useful in the development of effective biocontrol agents. 相似文献
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Hiroyuki Ohta Kazuya OgiwaraEri Murakami Hiroshi TakahashiMasaru Sekiguchi Kiyokazu KoshidaTakashi Someya Wataru MorishimaJose D Rondal Rogelio N ConcepcionMasao Yoshida Makiko Watanabe 《Soil biology & biochemistry》2003,35(8):1155-1158
The diversity of bacterial populations developed in the surface layer (0-0.25 m depth) of volcanic mudflow deposits from the Mt. Pinatubo volcano (the Philippines) was investigated using quinone profiling. Samples were collected from sites (named N and S1) that had been hit repeatedly by mudflows during successive rainy seasons after the violent eruption of 1991 and also from sites (F1 and F3) covered by mudflow in 1991 but with no deposition in following years. The total microscopic count ranged from 108 g−1 (N and S1 sites) to 3.9×109 g−1(site F3). In the N sample only three quinone species were detected, while the quinone profiles of samples from sites S3 and F3 showed higher diversity. Tetrahydrogenated menaquinone with eight isoprenoid units [MK-8 (H4)] was the predominant quinone species in the sample from site N, while MK-8, MK-8 (H2), MK-8 (H4), MK-9 (H4) and MK-9 (H8) were found as major quinones in the sample from site F3. Because these MK species are known to be the major respiratory quinones of the Actinobacteria, this bacterial group is expected to predominate in the land with primary vegetation recovery following the impact of the volcanic mudflow. 相似文献
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Someya A Otsuki K Murase T 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2007,69(10):1009-1014
The present study reports colibacillosis of layer chickens in a commercial egg-producing farm in western Japan. Three flocks of chicken at 18-21 weeks of age were affected during the initiation of egg lay. Postmortem examination revealed pericarditis, perihepatitis, airsacculitis, subcutaneous inguinal lesion, and injured cloaca. Escherichia coli was isolated from the lesions of the affected birds. Twenty-two of 26 E. coli isolates (84.6%) obtained from 18 birds in the 3 flocks showed pulsed-field gel electrophoresis (PFGE) patterns that were considered to be closely associated to each other and arbitrarily designated as pattern A. All the 22 isolates with the PFGE pattern A harbored the putative virulence genes, astA, iss, iucD, tsh, and cva/cvi. Additional 2 PFGE patterns (B and C) were also found in E. coli isolates obtained from the affected flocks and had the putative virulence genes in combinations different from those in the pattern A strains. The results suggested that certain E. coli virulence genes and host factors, such as initiation of egg lay may be associated with occurrence of colibacillosis. 相似文献
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Masaharu Kubota Osamu Tamura Yasuhiro Nomura Noriko Orihara Norihito Yamauchi Kengo Yonemoto Kenichiro Chiba Nobutaka Someya 《Journal of General Plant Pathology》2017,83(2):117-120
Isolates of spinach downy mildew fungus, Peronospora farinosa f. sp. spinaciae, collected at seven sites in Japan from December 2013 to March 2016, were identified as belonging to races 8, 10, 12 and 13, and one was unauthorized. Races 10, 12, 13 and the unauthorized were first found in Japan. 相似文献
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Nobutaka Someya Masami Nakajima Hiroshi Hamamoto Isamu Yamaguchi Katsumi Akutsu 《Journal of General Plant Pathology》2004,70(6):367-370
Serratia marcescens strain B2 is a potential biocontrol agent that produces the antibiotic pigment prodigiosin. When this strain was incubated under white or blue light conditions (<100µmol m–2s–1), prodigiosin concentration in bacterial cells decreased, but growth did not. However, red and far-red light had no effect on prodigiosin concentration in bacterial cells. Purified prodigiosin was degraded under white or blue light conditions but was not degraded under red and far-red light. Because white and blue light appeared to affect the stability of prodigiosin itself, light conditions may affect the suppressive effects of the biocontrol agent S. marcescens strain B2. 相似文献
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Sundar VC Zaumseil J Podzorov V Menard E Willett RL Someya T Gershenson ME Rogers JA 《Science (New York, N.Y.)》2004,303(5664):1644-1646
We introduce a method to fabricate high-performance field-effect transistors on the surface of freestanding organic single crystals. The transistors are constructed by laminating a monolithic elastomeric transistor stamp against the surface of a crystal. This method, which eliminates exposure of the fragile organic surface to the hazards of conventional processing, enables fabrication of rubrene transistors with charge carrier mobilities as high as approximately 15 cm2/V.s and subthreshold slopes as low as 2nF.V/decade.cm2. Multiple relamination of the transistor stamp against the same crystal does not affect the transistor characteristics; we exploit this reversibility to reveal anisotropic charge transport at the basal plane of rubrene. 相似文献