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Photoactivated Perylenequinone Toxins in Plant Pathogenesis

  • Chapter
Plant Relationships

Part of the book series: The Mycota ((MYCOTA,volume 5))

Abstract

Fungi that parasitize plants have at their disposal a large and diverse set of tools required for successful colonization of their hosts. Among the most effective of these strategies is the production of phytotoxic compounds that play multiple roles in plant disease. These range from toxins that facilitate infection by suppressing normal plant defense pathways to ones that alter normal metabolic processes and symptom expression to toxins that directly kill the cells of the host, allowing for colonization of dead tissue. Among the most intriguing of the well studied plant pathogen toxins are the photoactivated perylenequinones. These substances, the product of the polyketide pathway in ascomycete fungi, are colored compounds that are converted to their toxic state through photoactivation. Although studied most for their involvement in plant pathogenesis, photoactivated perylenequinones have also been recovered from saprophytic species, suggesting that they may have broad functions in fungi. This chapter summarizes the current state of knowledge of the mode of action, biosynthesis, regulation, and understanding of cellular resistance to this group of compounds, with an emphasis on studies done on the perylenequinone cercosporin, produced by members of the genus Cercospora, a large and successful group of foliar plant pathogens.

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Authors and Affiliations

  1. Department of Plant Biology, North Carolina State University, Raleigh, NC, 27695-7612, USA

    Margaret E. Daub

  2. Citrus Research and Education Center, University of Florida, Lake Alfred, FL, 33850, USA

    Kuang-Ren Chung

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  2. Kuang-Ren Chung
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Correspondence to Margaret E. Daub .

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  1. Phytopathologie und Pflanzenschutz, Naturwissenschaftliche Fakultät III Institut für Agrar- und Ernährungswissenschaften, Ludwig-Wucherer-Str. 2, 06099, Halle (Saale), Germany

    Holger B. Deising

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Daub, M.E., Chung, KR. (2009). Photoactivated Perylenequinone Toxins in Plant Pathogenesis. In: Deising, H.B. (eds) Plant Relationships. The Mycota, vol 5. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-87407-2_11

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