Inhibitory Activity of Analogs of AM-Toxin, a Host-specific Phytotoxin from the Alternaria alternata Apple Pathotype, on Photosynthetic O2 Evolution in Apple Leaves

Masahiro MIYASHITA; Tomoko NAKAMORI; Hisashi MIYAGAWA; Miki AKAMATSU; Tamio UENO

doi:10.1271/bbb.67.635

Organic Chemistry Notes

Inhibitory Activity of Analogs of AM-Toxin, a Host-specific Phytotoxin from the Alternaria alternata Apple Pathotype, on Photosynthetic O₂ Evolution in Apple Leaves

Masahiro MIYASHITA, Tomoko NAKAMORI, Hisashi MIYAGAWA, Miki AKAMATSU, Tamio UENO

Author information

Keywords: AM-toxin, photosynthesis, host-specific toxin, oxygen electrode, necrosis

JOURNAL FREE ACCESS

2003 Volume 67 Issue 3 Pages 635-638

DOI https://doi.org/10.1271/bbb.67.635

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Abstract

The effect of the host-specific phytotoxins, AM-toxins, on the photosynthetic activity of leaves from susceptible apple cultivars was investigated by using an oxygen electrode. The photosynthetic O₂ evolution was inhibited by AM-toxin I in a host-specific manner. The inhibitory activity of several AM-toxin analogs against photosynthesis was also evaluated and the findings were correlated with their necrosis-inducing activity.

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