Delayed fluorescence as an indicator of the influence of the herbicides Irgarol 1051 and Diuron on hard coral Acropora digitifera
| Autor: | Ichiro Takeuchi, Masakazu Katsumata |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
Photosystem II Coral 010501 environmental sciences Aquatic Science Oceanography Photosynthesis 01 natural sciences Fluorescence Acropora digitifera Animals Acropora Symbiosis Irgarol 1051 0105 earth and related environmental sciences biology Herbicides Triazines Environmental Exposure Anthozoa biology.organism_classification Pollution Outflow rate Diuron Environmental chemistry Dinoflagellida Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Marine Pollution Bulletin. 124:687-693 |
| ISSN: | 0025-326X |
| Popis: | We examined the effect of two herbicides (Irgarol 1051 and Diuron) on symbiotic dinoflagellates in the hard coral Acropora digitifera using delayed fluorescence (DF), specifically assessing changes in molecular membrane transport, i.e. inflow and outflow rates, and the binding of the herbicides to target proteins in photosystem II. The DF approach is rapid (e.g. measurement time, 60 s) and non-invasive, and can provide data on the extent of a photosynthetic system and the activity of its electron carriers. The DF of A. digitifera is inhibited 2 h after exposure to 1 μg/L of either Irgarol or Diuron. Analysis of DF inhibition over time by a compartment model suggests that Irgarol exposure results in a relatively higher inflow rate and lower outflow rate than does Diuron exposure. This suggests that Irgarol exposure more strongly inhibits photosynthesis and that the coral symbiotic dinoflagellates recover less from inhibition. |
| Databáze: | OpenAIRE |
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