ラフレモンにおける宿主特異的毒素の作用機構

概要

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Host-selective toxins are low molecular weight compounds and possess selective toxicities to particular cultivars or species of certain host plants. The selective toxicity of host-selective toxins is correlated with pathogenicity of the toxin producers, and host selective toxins are demonstrated as the disease determinant factor. Pathogens of Alternaria leaf spot of rough lemon and Alternaria brown spot of tangerines are Alternaria alternata producing different host-selective toxins, ACR-toxin and ACT-toxin. Despite the morphological similarity of A. alternata, these pathogens are possible to distinguish by determination of production of either toxin and comparing their host ranges in various citrus cultivars. Citrus is one of the major fruit trees planted around the world, however little is known about molecular basis for understanding the defense and stress responses against various exogenous factors. This review focuses on an overview of recent progress of researches on the mechanisms of specificity system in interactions of citrus cultivar rough lemon and A. alternata.
2008-12-19