Japanese Journal of Phytopathology
Online ISSN : 1882-0484
Print ISSN : 0031-9473
ISSN-L : 0031-9473
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Volume 76, Issue 3
Displaying 1-8 of 8 articles from this issue
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Presidential Address
Lectures by the Winners of the Society Fellowship
Originals
  • Pathogenicity of Fusarium solani f. sp. eumartii, the causal pathogen of foot rot of tomato, on flowers, fruits and stems of tomato plants.
    K. NAKAYAMA, T. WAKI, T. AOKI, M. MORISHIMA, T. FUKUDA
    2010 Volume 76 Issue 3 Pages 135-141
    Published: 2010
    Released on J-STAGE: September 15, 2010
    DOIhttps://doi.org/10.3186/jjphytopath.76.135
    JOURNAL FREE ACCESS
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    Intact flowers and fruits on tomato cultivar Reiyo were inoculated with a conidial suspension of the causal pathogen of foot rot of tomato, Fusarium solani f. sp. eumartii 04T-2 (MAFF 240346), and the fungus was verified to cause the rot symptoms on these organs. Rot on fruits began at the base of the style, and a maximum of 34.8% of the fruits developed the rot. After wound inoculation of detached fruits, the rot symptom started to appear after 48 h, and 95.0% of the inoculated fruits had rotted after 96 h at 25°C. When healthy stems of cvs. Reiyo and Joint were inoculated with the fungus cultured on a soil wheat mixture, a brown rot identical to the natural symptom was reproduced on the stems of the cultivars. Inoculation of intact stems with a conidial suspension also caused symptoms on the stems of the both cultivars. These results indicate that F. solani f. sp. eumartii is pathogenic on flowers, fruits and stems of tomato plants. These aerial parts of the plants can also become sources of inoculum.
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  • Quantitative correlation between elicitor-responsive photon emission and hydrogen peroxide induced in rice with N-acetylchitohexaose.
    K. KATO, H. HONZAWA, H. IYOZUMI, H. NUKUI
    2010 Volume 76 Issue 3 Pages 142-148
    Published: 2010
    Released on J-STAGE: September 15, 2010
    DOIhttps://doi.org/10.3186/jjphytopath.76.142
    JOURNAL FREE ACCESS
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    Correlation analysis was performed between elicitor-responsive photon emission (ERPE) and hydrogen peroxide generation (HP) in suspension-cultured rice cells elicited with N-acetylchitohexaose. With elicitor concentrations from 0.03 to 1000 μM, ERPE and HP followed similar patterns in time-course studies. In addition, both ERPE and HP increased with increasing concentrations of N-acetylchitohexaose according to a natural logarithm function. On the basis of these results, we clarified that ERPE and HP have similar generation patterns. To analyze the quantitative relation between ERPE and HP, we measured both ERPE and HP fluctuations after altering concentrations of the elicitor or using the priming effect of a plant activator. The correlation coefficient between ERPE and HP was 0.95~0.97 (P<0.01) for the elicitor, and 0.90~0.93 (P<0.01) for the activator. Thus, we elucidated that ERPE is quantitatively correlated with HP.
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Abstracts of the Papers Presented at the 2010 Annual Meeting
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