Seasonal variation in the content of sennoside in Senna leaves
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Cassia acutifolia (Alexandrian Senna) andC.angustifolia (Tinnevelly Senna) have great medicinal value because of sennosides, in leaves and pods, used as purgatives. The seasonal variation of sennoside in leaves of these species was studied from January to December 1975.
A decline in the sennoside content was observed in both species with the onset of flowering and fruiting. A fall in the sennoside content was also observed during the rainy season. This fall was experimentally shown to be due to the leaching effect of rain. After the rainy season the plants shed their old leaves and newly sprouted leaves contained a very high percentage of sennosides, which again declined on maturation.
KeywordsRainy Season Plant Stage Main Shoot Sennoside Pharmaceutisch Weekblad Scientific Edition
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