トマトアルターナリア茎枯病菌が感染したトマト植物組織内における病原菌および宿主特異的AAL毒素の分布 Fungal growth and in planta distribution of host-specific AAL-toxin in tomato plants infected with the tomato pathotype of Alternaria alternata

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Abstract

<i>Alternaria alternata</i> tomato pathotypeは,宿主特異的AAL毒素生産によりトマトアルターナリア茎枯病を引き起こす.AAL毒素はマイコトキシン フモニシンの構造類縁体であり,その生物活性も類似する.罹病植物組織内における病原菌の伸長と産生された毒素の確認は,毒素の病理学的重要性とリスクの評価のために重要である.抵抗性植物品種上において,病原菌および毒素は接種部位のみに局在していた.一方,感受性品種上では,毒素の広範な分布と病原菌の伸長が確認された.本研究の結果から,AAL毒素の病理学的重要性が確認されるとともに,罹病トマトにおける毒素による汚染リスクの可能性が示唆された.

  The tomato pathotype of <i>Alternaria alternata</i> causes Alternaria stem canker of tomato (<i><i>Solanum lycopersicum</i></i> L.) by producing a host-specific AAL-toxin. The chemical structure and biological activities of AAL-toxin are analogous to those of the mycotoxin fumonisin. Determination of pathogen development and toxin production in infected tomato plants is of prime importance for pathological evaluation and risk assessment of AAL-toxin. On a resistant cultivar, AAL-toxin and the pathogen were restricted to a small region surrounding only the initial inoculation site. On the other hand, widespread distribution of the toxin and the pathogen were detected in a susceptible cultivar. The pathological significance and contamination risk from the toxin were supported by the results of <i>in planta</i> production of the toxin in diseased tomato plants.

Journal

  • JSM Mycotoxins

    JSM Mycotoxins 62(1), 7-13, 2012-01-31

    Japanese Society of Mycotoxicology

References:  27

Codes

  • NII Article ID (NAID)
    10030541351
  • NII NACSIS-CAT ID (NCID)
    AN00334513
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    02851466
  • Data Source
    CJP  J-STAGE  JASI 
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