Extracts from <Emphasis Type="Italic">Ralstonia solanacearum</Emphasis> induce effective resistance to the pathogen in both <Emphasis Type="Italic">Arabidopsis</Emphasis> and solanaceous plants     

Reona Takabatake  Takafumi Mukaihara 《Journal of General Plant Pathology》2011,77(1):33-42

Plants defend themselves against microbial invasions by detecting conserved molecules, collectively called pathogen-associated molecular patterns (PAMPs). PAMPs-triggered basal resistance is the first inducible layer of plant defense. Here we found that Ralstonia solanacearum strain RS1002 can efficiently grow and cause disease in ecotype Columbia-0 of the model plant Arabidopsis thaliana in a manner dependent on the Hrp type III secretion system (T3SS). The extent of disease symptoms caused by R. solanacearum was reduced in plants pretreated with ΔhrpY mutant deficient in the functional Hrp T3SS. Pretreatment with a boiled extract (BE) from R. solanacearum had a similar inhibitory effect on disease development or bacterial multiplication in both Arabidopsis and several solanaceous plants. Simultaneous inoculations with BE and R. solanacearum did not induce BE-mediated resistance, nor did a BE treatment with proteinases. These results indicate that host plants recognize an unknown proteinaceous PAMP in the BE to induce disease resistance and that the Hrp T3SS of R. solanacearum can suppress it. From an analysis using Arabidopsis mutants lacking PAMP receptors, the elongation factor Tu of R. solanacearum was shown to partially contribute to BE-mediated basal resistance in Arabidopsis plants.  相似文献   

Comparison of Ni/Zn Accumulation Ability of Thlaspi japonicum from Three Different Areas in Hokkaido     

Takafumi Mizuno  Hitoshi Obata  Kenji Horie  Shiro Nosaka  Naoharu Mizuno 《Soil Science and Plant Nutrition》2005,51(4):589-594

Thlaspi japonicum is a Japanese Ni-hyperaccumulator plant growing in areas with serpentine soil containing a high level of Ni. In the present study, we investigated the ability of wild Thlaspi japonicum plants inhabiting non-ultramafic soil areas of Hokkaido to accumulate Ni/Zn. Wild T. japonicum plants growing on Rebun Island (Rebun-T) accumulated small amounts of Ni, while the plants cultivated on ultramafic rock soil accumulated large amounts of Ni, like T. japonicum growing on Mt. Yubari (Yubari-T), and this change was also observed for T. japonicum growing on Mt. Tengu (Tengu-T). All the T. japonicum plants transplanted on both ultramaflc soil or Andosol accumulated over 100 mg kg⁻¹ Zn, especially the Ni/Zn content of Tengu-T plants tended to be higher than that of the plants growing in the other two areas. In contrast, transplanting of Yubari-T plants from ultramafic soil with a high level of Ni to soil with a lower-Ni content decrease of the Ni concentration in the leaves. Wild Rebun-T plants showed a smaller biomass than the Yubari-T and Tengu-T plants, and some individuals of the Rebun-T population were smaller than those of the other populations, with tiny radical leaves. Zinc content of the small leaves was not significantly different from that in large leaves. These results suggested that T. japonicum plants are able to accumulate high Ni/Zn accumulation, regardless ecotype, habitat and leaf size.  相似文献   

Lymphocyte transformation of peripheral blood lymphocytes and plaque forming cells of the spleen and the mesenteric lymph node in suckling piglets with and without immunopotentiators     

S Namioka  T Ohsugi  T Fujimoto  Y Maede 《The Japanese journal of veterinary research》1983,31(2):53-64

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Ultrastructural studies on muscular atrophy in Marek's disease. II. Muscular lesions in spontaneous cases     

H Madarame  Y Fujimoto  R Moriguchi 《The Japanese journal of veterinary research》1986,34(1):51-75

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Serum concentration and properties of alpha-fetoprotein and serum level of albumin in sucking piglets     

T Fujimoto  A Hara  Y Maede  S Namioka 《Research in veterinary science》1984,36(2):212-216

Porcine alpha-fetoprotein (AFP) was purified from the sera of four-day-old piglets using an immunoadsorbent column. The molecular weight of the AFP was 80,000 when determined by gel filtration on Sephadex G-200 and 75,000 when determined by sodium dodecylsulphate polyacrylamide gel electrophoresis. The isoelectric point of the AFP was pH 4.85 at 0 degree C. The maximum concentration of serum AFP was reached on the fourth day after birth (mean value 1.1 mg ml-1), and it then decreased to 10 micrograms ml-1 when the piglets were 35 days old. The concentration of serum albumin increased rapidly between birth and seven days old, reaching 16 to 17 mg ml-1 at seven days old. Between birth and seven days old, the serum concentrations of AFP and albumin were approximately inversely proportional.  相似文献   

Isolation of influenza A viruses from migratory waterfowl in San-in District, western Japan in the winter of 1983-1984   总被引：1，自引：0，他引：1  

K Otsuki  O Takemoto  R Fujimoto  K Yamazaki  N Kubota  H Hosaki  T Mitani  M Tsubokura 《Research in veterinary science》1987,43(2):177-179

Certain species of winter migratory waterfowl in San-in District, western Japan, were surveyed for influenza virus from November 1983 to March 1984. Faeces of the waterfowl were collected regularly at five stations. Eleven influenza A viruses including H5N3 and H10N4 subtypes were isolated from 450 faecal samples from whistling swans, 28 viruses including H2N2 and H10N4 subtypes were isolated from 362 faecal samples from pintails; and subtype H13N6 was isolated from 240 faecal samples of black-tailed gulls.  相似文献   

Pathological studies of Marek's disease. I. The histopathology on field cases in Japan   总被引：2，自引：0，他引：2  

Y Fujimoto  M Nakagawa  K Okada  M Okada  K Matsukawa 《The Japanese journal of veterinary research》1971,19(1):7-26

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Persistence of secondary spongiosa in three calves     

T Umemura  R Fujimoto  M Goryo  C Itakura 《Veterinary pathology》1988,25(4):312-314

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The fine structure of Marek's disease virus and herpesvirus of turkey in cell culture   总被引：3，自引：0，他引：3  

K Okada  Y Fujimoto  T Mikami  K Yonehara 《The Japanese journal of veterinary research》1972,20(3):57-68

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Proportion of abortions due to neosporosis among dairy cattle in Japan   总被引：2，自引：0，他引：2  

Koiwai M  Hamaoka T  Haritani M  Shimizu S  Kimura K  Yamane I 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2005,67(11):1173-1175

A retrospective cohort study was conducted to clarify the association between seropositive reactions to Neospora caninum and subsequent reproductive disorders among dairy cattle in Japan. A statistically significant association between Neospora seropositive reactions and abortions was observed (P=0.016), and seropositive cattle were 6.1 times more likely to abort compared to seronegative cows. No significant differences were observed between seropositive reactions and other reproductive disorders such as conception failure, perinatal death and calf mortality. As indicated by estimation of the attributable fraction, 83.6% of abortions in Neospora seropositive animals may be attributed to N. caninum. Considering seroprevalence of N. caninum in the cattle which aborted in Japan, 21.8% of abortions were estimated to be caused by neosporosis in Japan.  相似文献