Citrus as a molecular contact point for co-evolution of Alternaria pathogens

Kazuya Akimitsu, Kouhei Ohtani, Takuya Shimagami, Mai Katsumoto, Chika Igarashi, Sawa Tanaka, Syu Matsuoka, Susumu Mochizuki, Takashi Tsuge, Mikihiro Yamamoto, Motoichiro Kodama, Kazuya Ichimura, Kenji Gomi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Alternaria black rot, Alternaria leaf spot of rough lemon, and Alternaria brown spot of tangerines are three major citrus Alternaria pathogens. Citrus could be considered as a molecular contact point for host-selective toxin (HST)-mediated co-evolution of these Alternaria pathogens and susceptibility in the field. ACR-toxin is an HST produced by the rough lemon pathotype, and the target site of the toxin was identified as rough lemon mitochondria. The biosynthetic gene cluster for ACR-toxin production is on the 1.5 Mb-chromosome of the rough lemon pathotype. Another gene cluster for ACT-toxin production is located on the 1.9 Mb-chromosome of the tangerine pathotype. These TOX genes shown to have a role in ACR- or ACT-toxin biosynthesis by using gene disruption and silencing.

Original languageEnglish
Pages (from-to)93-96
Number of pages4
JournalPhysiological and Molecular Plant Pathology
Publication statusPublished - Jul 1 2016


  • Alternaria alternata
  • Co-evolution
  • Conditionally dispensable chromosome
  • Host-selective toxin
  • Pathogenicity

ASJC Scopus subject areas

  • Genetics
  • Plant Science


Dive into the research topics of 'Citrus as a molecular contact point for co-evolution of Alternaria pathogens'. Together they form a unique fingerprint.

Cite this