(+)-Catechin acts as an infection-inhibiting factor in strawberry leaf

M. Yamamoto, S. Nakatsuka, H. Otani, K. Kohmoto, S. Nishimura

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58 Citations (Scopus)


An infection-inhibiting factor (IIF) was isolated from strawberry leaves and identified as (+)-catechin. This compound inhibited the formation of infection hyphae from appressoria of Alternaria alternata, but allowed both spore germination and appressorial formation. It is a normal component of strawberry leaves, but further accumulates as the major IIF in response to inoculation with nonpathogenic spores of A. alternata. The accumulation of (+)-catechin on a susceptible host was not induced, however, by inoculation with pathogenic spores of the strawberry pathotype or by inoculation with nonpathogenic spores supplemented with host-specific toxin (AF-toxin I). These results imply that (+)-catechin acts as a protective agent during induced resistance and that AF-toxin I acts as a fungal suppressor of induced resistance.

Original languageEnglish
Pages (from-to)595-600
Number of pages6
Issue number6
Publication statusPublished - Jun 2000


  • Alternaria black spot of strawberry

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science


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