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Polluants

Utilisation des systèmes photosynthétiques comme éléments. biologiques pour la détection de polluants. stroma. granum. thylacoïde. chloroplaste. lamelle stromatique. membrane thylacoïde. thylacoïde. espace thylacoïde ou lumen. HERBICIDES. stroma. CF. FNR. Fd. 1. cyt b 559. LHC II.

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Polluants

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  1. Utilisation des systèmes photosynthétiques comme éléments biologiques pour la détection de polluants stroma granum thylacoïde chloroplaste lamelle stromatique membrane thylacoïde thylacoïde espace thylacoïde ou lumen HERBICIDES stroma CF FNR Fd 1 cyt b 559 LHC II LHC I pool PQ PS II cyt b PS I CF 0 f membrane thylacoïde 6 PCy - + lumen 2 H O OEC O + 4 e + 4 H 2 2 Polluants : herbicides de la famille des urées et de la famille des triazines inhibent la photosynthèse en agissant sur le transfert d'électrons au niveau du photosystème II (PSII) et métaux lourds qui agissent à différents endroits avec une sensibilité plus marquée du PSII

  2. 4) Open and Close circuit We realised works to see the differences between the inhibition with an open circuit (big quantities of herbicides) and a close one (5 mL) Peristaltic pump Peristaltic pump Herbicide Cuve Herbicide Cuve Hansatech + photosynthetic system Hansatech + photosynthetic system End of circuit Computer Computer Close circuit Open circuit

  3. This table represents the values obtains with the two kinds of circuit Increase of inhibition: 25 %

  4. Inhibition curve of diuron with continuous flow We wanted to determinate: - I50 at 15 min : - - I10 at 15 min : 46 ppb -I50 at 30 min : 8 ppm -I10 at 30 min : 5 ppb This method is not enough sensitive Values higher than the European limits

  5. Inhibition curve of different herbicides (manual method) You are going to see, the inhibition curves of: - Diuron - Atrazine - Metribuzine

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