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Updated: Oct 7, 2026
Evaluation of Photosynthetic Efficiency in Photorespiratory Mutants by Chlorophyll Fluorescence Analysis
Published on: December 9, 2022
Chlorophyll a fluorescence and photosynthetic activity as tools for the evaluation of simazine toxicity to
I A Kobbia1, M G Battah, E F Shabana
1Botany Department, Faculty of Science, Cairo University, Egypt.
Abstract:
On studying the effect of simazine on Protosiphon botryoides and Anabaena variabilis, data revealed that chlorophyll a content and dry weight were decreased with the increase in simazine concentration. High concentration of simazine (0.8 mg L(-1)) reduced gross photosynthesis and carbohydrate content, whereas protein content and respiration rate were increased. Algal cell recovery from simazine toxic effect occurred after 2 and 4 days for Anabaena and Protosiphon, respectively, which may be attributed to the difference in algal genotype of the tested organisms.
