Abstract
WhenChlorella protothecoides cells were grown in the presence of 30, 100 and 300 μM of SANDOZ 9785 and 9789, there was a significant decrease in cell number and packed cell volume as compared to control. SANDOZ 9789 seems to be a stronger inhibitor of growth than SANDOZ 9785. The immediate effect of pyridazinone herbicides on photosynthesis showed that SANDOZ 9789 is a weaker inhibitor than SANDOZ 9785. There was no direct correlation between the inhibition of growth and photosynthesis by the herbicide treatment suggesting that the inhibition of photosynthesis is not the primary cause of growth inhibition. Experiments on growth, carried out with non-photosynthetic and non green cells also support this suggestion. The observed increase in cell size when the cells grown with SANDOZ 9785 suggests that cell division was inhibited by SANDOZ 9785.
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Samuel, K., Bose, S. Sites of action of pyridazinone herbicides (SANDOZ 9785 and 9789) onChlorella protothecoides . Proc. Indian Acad. Sci. 97, 415–423 (1987). https://doi.org/10.1007/BF03053569
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DOI: https://doi.org/10.1007/BF03053569