The Role of Light and Oxygen in the Action of the Photosynthetic Inhibitor Herbicide Monuron

Abstract Monuron treatment of detached flax cotyledons caused a rapid inhibition of CO2 fixation in darkness and light. Chlorophyll breakdown was promoted by increased light intensity. Ethane generation, an indicator of membrane damage, increased as the chlorophyll level decreased. The carotene pigments were destroyed more rapidly than the xanthophylls and chlorophylls. Treatment of cotyledons with monuron in the absence of oxygen almost prevented carotenoid and chlorophyll loss. The addition of the singlet oxygen quencher DABCO delayed chlorophyll breakdown. The results are discussed in relation to a role for singlet oxygen in the herbicidal action of monuron.

• Publication year

  1979

• Venue

  Zeitschrift für Naturforschung C

• Publication date

  1979-11-01

• Fields of study

  Biology, Chemistry, Environmental Science

• Identifiers
  DOI 10.1515/znc-1979-1136
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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