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Key Event: 2457
Key Event Title
Decreased, electron transport in photosystem II
Short name
Biological Context
| Level of Biological Organization |
|---|
| Cellular |
Cell term
Organ term
Event Components
Key Event Overview
AOPs Including This Key Event
| AOP Name | Role of event in AOP | Point of Contact | Author Status | OECD Status |
|---|---|---|---|---|
| PSII inhibition by atrazine leading to rice yield loss | KeyEvent | SURIYA S (send email) | Under development: Not open for comment. Do not cite |
Taxonomic Applicability
Life Stages
Sex Applicability
Key Event Description
A decrease in the rate of electron flow through the photosystem II (PSII) complex due to the blocked QB site, preventing the reduction of plastoquinone and halting the flow of electrons to the cytochrome b6f complex.
How It Is Measured or Detected
Measured via electron transport rate (ETR) derived from chlorophyll fluorescence, or by measuring the reduction of artificial electron acceptors (e.g., DCPIP) in isolated thylakoid membranes.
Domain of Applicability
Taxonomic Applicability: Oryza sativa (rice) and other higher plants. Life Stage: Vegetative and reproductive stages. Sex: Not applicable.
References
1. Trebst, A. (2007). Inhibitors of photosystem II: Their history and mode of action. Zeitschrift für Naturforschung C, 62(3-4), 173-182. 2. Kumar, S., et al. (2018). Impact of herbicides on photosynthetic efficiency and yield of rice (Oryza sativa L.). Pesticide Biochemistry and Physiology, 148, 22-29.