Innate Vulnerability of <i>Oryza glaberrima</i> to <i>Rice tungro bacilliform virus</i>

DOI Web Site 参考文献23件 オープンアクセス
  • SAITO Nozomi
    Laboratory of Plant Breeding, Research Faculty of Agriculture, Hokkaido University
  • ENCABO Jaymee R.
    Plant to Rice Breeding Platform, International Rice Research Institute Microbiology Division, Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines
  • CHEN Sunlu
    Laboratory of Plant Breeding, Research Faculty of Agriculture, Hokkaido University
  • JONSON Gilda
    Plant to Rice Breeding Platform, International Rice Research Institute
  • KISHIMA Yuji
    Laboratory of Plant Breeding, Research Faculty of Agriculture, Hokkaido University
  • CHOI Il-Ryong
    Plant to Rice Breeding Platform, International Rice Research Institute

説明

<p>Rice tungro disease (RTD) is a serious threat to rice production in South and Southeast Asia. RTD is caused by Rice tungro bacilliform virus (RTBV) and Rice tungro spherical virus (RTSV). Coinfection of RTSV and RTBV results in more severe symptoms in African rice Oryza glaberrima than in Asian rice O. sativa. In this study, we examined whether RTBV alone causes more severe symptoms in O. glaberrima than in O. sativa. The examination of 18 accessions of O. glaberrima for RTBV infection indicated that all the O. glaberrima accessions examined were susceptible to RTBV. The reactions to RTBV of three O. glaberrima accessions and two RTBV-susceptible varieties of O. sativa, Taichung Native 1 (TN1) and IR 64, were compared. RTBV accumulation varied depending on the plants and differences in RTBV accumulation were not evident between the two species. However, the O. glaberrima accessions were significantly more stunted by RTBV than IR 64 was. Discoloration of leaves by RTBV was evident in the O. glaberrima plants, but not in the O. sativa plants. Collectively, these results presumably indicated that O. glaberrima is generally more vulnerable to RTBV than O. sativa is.</p>

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