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Journal of General Plant Pathology

, Volume 85, Issue 6, pp 458–462 | Cite as

Exploring the origin of crop pathogens: host-specific toxin-producing pathogens as a case study

  • Takashi TsugeEmail author
Presidential Address
  • 87 Downloads

Introduction

In the agroecosystem, new diseases often occur within several years after the introduction of a new crop species or cultivar. These diseases, referred to as “man-made diseases”, appear only on newly introduced crops that are genetically susceptible to the pathogens. Because these new diseases appear very soon after the introduction of a new crop, the pathogen most likely did not arise by mutation after cultivation began, but was already present in the population as a potential pathogen. How do pathogens emerge in the field? How and where do potential pathogens live and maintain their pathogenicity until they meet a host crop? Information on the origin of crop pathogens is still very limited.

Since 1981, I have worked on Alternaria alternatapathogens, which produce host-specific toxins (HSTs). HSTs produced by fungal pathogens are generally low-molecular weight secondary metabolites with a diverse range of structures that function as effectors controlling pathogenicity or...

Notes

Acknowledgements

I express my deepest gratitude to all my colleagues and students for their enthusiastic collaboration and cooperation with this research. Most of this work was supported by Grants-in-Aid for research projects from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.

Compliance with ethical standards

Conflict of interest

The author declares that he has no conflicts of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by the author.

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Copyright information

© The Phytopathological Society of Japan and Springer Japan KK, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Bioscience and TechnologyChubu UniversityKasugaiJapan

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