Inhibitory activity of analogs of AM-toxin, a host-specific phytotoxin from the Alternaria alternata apple pathotype, on photosynthetic O2 evolution in apple leaves.
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.
Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan. miyamasa@kais.kyoto-u.ac.jp
Masahiro
M
Miyashita
Tomoko
T
Nakamori
Hisashi
H
Miyagawa
Miki
M
Akamatsu
Tamio
T
Ueno
D000528:Alternaria / Q000737:chemistry*; D004566:Electrodes; D006790:Host-Parasite Interactions; D027845:Malus / Q000187:drug effects* / Q000378:metabolism; D009183:Mycotoxins / Q000031:analogs & derivatives* / Q000494:pharmacology*; D009336:Necrosis; D010100:Oxygen / Q000378:metabolism*; D010456:Peptides, Cyclic / Q000737:chemistry / Q000494:pharmacology*; D010788:Photosynthesis / Q000187:drug effects*; D010935:Plant Diseases / Q000382:microbiology; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism
D009183:Mycotoxins; D010456:Peptides, Cyclic; D010100:Oxygen