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Published on: May 21, 2019
Lipid peroxidation is a consequence of elicitor activity
K R Rogers1, F Albert, A J Anderson
1Biology Department, Utah State University, Logan, Utah 84322-4500.
Plant Physiology
|February 1, 1988
Summary
Fungal elicitors trigger lipid peroxidation in bean tissues, leading to lipofuscin-like pigment accumulation and phytoalexin production. Active oxygen species may mediate this plant defense response.
Area of Science:
- Plant Pathology
- Biochemistry
- Plant Physiology
Background:
- Plant defense mechanisms are crucial for resisting pathogen attacks.
- Lipid peroxidation is a known indicator of cellular damage and stress.
- Elicitors from plant pathogens can trigger defense responses in host plants.
Purpose of the Study:
- To investigate the effect of fungal elicitors from Colletotrichum lindemuthianum on bean tissues.
- To determine if lipid peroxidation products accumulate upon elicitor treatment.
- To explore the role of active oxygen species in elicitor-induced responses.
Main Methods:
- Treatment of bean suspension cells with crude and purified elicitors.
- Measurement of lipofuscin-like pigment (LEP) and malondialdehyde accumulation.
- Induction of phytoalexins (kievitone, phaseollin, phaseollinisoflavan).
- Treatment with active oxygen species generators (xanthine:xanthine oxidase, Fe:EDDHA).
Main Results:
- Elicitor treatment stimulated the accumulation of lipid peroxidation products, including LEP and malondialdehyde.
- LEP accumulation correlated with visible browning and phytoalexin production.
- Active oxygen species generators mimicked the effects of elicitors, inducing phytoalexins and LEP.
Conclusions:
- Fungal elicitors induce lipid peroxidation in bean tissues.
- Active oxygen species generation is likely involved in elicitor-induced lipid peroxidation and defense.
- This suggests a role for oxidative stress in plant-pathogen interactions.
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