Japanese Journal of Phytopathology
Online ISSN : 1882-0484
Print ISSN : 0031-9473
ISSN-L : 0031-9473
Volume 75 , Issue 3
Showing 1-11 articles out of 11 articles from the selected issue
Presidential Address
Lectures by the Winners of the Society Fellowship
Originals
  • S. YAMASAKI, J. SAKAI, S. KAMISOYAMA, K. HANADA
    2009 Volume 75 Issue 3 Pages 156-163
    Published: 2009
    Released: September 02, 2009
    JOURNALS FREE ACCESS
    A new isolate of Sweet potato feathery mottle virus (SPFMV) was obtained from Ipomoea batatas in Oita Prefecture in Japan. The symptoms of I. nil infected with this new isolate differed from those of plants infected with the severe (S), ordinary (O), or Tokushima (T) strains of SPFMV. In addition, reverse transcriptase-polymerase chain reaction-restriction fragment length polymorphism (RT-PCR-RFLP) analysis revealed that this isolate was distinct from these other three strains of SPFMV. The coat protein (CP) of this isolate is composed of 313 amino acids, which have over 90% homology with those in the CPs of SPFMV common strain (C), SPFMV-CH2, SPFMV6 and SPFMV-SOR. On the basis of a phylogenetic analysis of the amino acid sequences of the CP, the isolate was classified as a group C strain, among other strains of SPFMV isolated from sweet potato in other parts of the world. This is the first report on the detection of the SPFMV-C strain in Japan, and we have named this isolate SPFMV-Bungo.
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  • H. INOUE, M. YAMAUCHI, H. MIYAGAWA
    2009 Volume 75 Issue 3 Pages 164-169
    Published: 2009
    Released: September 02, 2009
    JOURNALS FREE ACCESS
    Iron coating of rice seeds was originally developed as a seed preparation for direct sowing in flooded paddy fields to reduce the number of floating seedlings and injuries from birds. Here we examined the efficacy of iron coating of rice seeds in the control seed borne bacterial and fungus diseases, because metal ions (e.g., copper and silver) have antimicrobial activity and have been used as a seed disinfectant. When rice seeds inoculated with Burkholderia plantarii, B. glumae or Acidovorax avenae subsp. avenae were coated with iron powder just before seeding, the subsequent seedlings had not developed any disease symptoms by two weeks after seeding. Iron coating was also effective against “Bakanae” disease, brown spot and blast caused by fungi. Four kinds of iron powders were tested, and all were effective against bacterial seedling blight, bacterial grain rot and bacterial brown stripe. Iron coating of rice seeds is advantageous because it can be used for both direct sowing in paddy fields and raising seedlings in nursery boxes. Iron coating to control disease will be developed as a new seed disinfection method to reduce the use of agricultural chemicals.
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Disease Notes
Abstracts of the Papers Presented at the 2009 Annual Meeting
Erratum
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