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Photosynthesis | Photosynthesis | Chloroplast

Photosynthesis rate and chlorophyll a fluorescence were also reduced by a paraquat concentration lower than 0,30 μM.

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As an herbicide, paraquat acts by inhibiting photosynthesis

Paraquat inhibits photosynthesis. In light-exposed plants, itaccepts electrons from and transfers them tomolecular oxygen. In this manner, destructive areproduced. In forming these reactive oxygen species, the oxidizedform of paraquat is regenerated, and is again available to shuntelectrons from to start the cycleagain.

Effects of Paraquat on Photosynthetic ..

In the present study, we studied the effects of the herbicide paraquat on growth, photosynthetic pigments, antioxidant enzymes, and gene expression in Chlorella pyrenoidosa under mixotrophic compared with autotrophic conditions.

Mode of action: how herbicides work | Paraquat …

The photosynthetic responses of marine phytoplankton, periphyton and epipsammon to the herbicides paraquat and simazine

These data showed that similar to autotrophic conditions, paraquat affected the activities of antioxidant enzymes and decreased Chl synthesis and transcription of photosynthesis-related genes in C.

Exposure to paraquat for 72 h under both autotrophic and mixotrophic conditions induced decreased growth and chlorophyll (Chl) content, increased superoxide dismutase and peroxidase activities, and decreased transcript abundances of three photosynthesis-related genes (light-independent protochlorophyllide reductase subunit, photosystem II protein D1, and ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit [rbcL]).

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Paraquat and Photosynthesis - As an herbicide, paraquat stops photosynthesis. -It accepts electrons from photosystem I and transfers them to molecular oxygen.

The effects of 2,4-D, glyphosate and paraquat on growth, photosynthesis and chlorophyll-a synthesis by a freshwater green alga, Scenedesmus quadricauda Berb 614, …
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