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Home > Archives > Volume 20, No 8 (2022) > Article

DOI: 10.14704/nq.2022.20.8.NQ44249

Seasonal environmental variations on physicochemical properties of Justicia adhatoda- An Indian Medicinal Plant.

Gautam Sadashiv Palshikar, Vivek Subhash Tarate, Kishor Vasant Otari, P. Shanmuga Pandiyan


Plants live on a planet with days and seasons, and that affects their phytoconstituents. Challenge is, availability of active principles in medicinal plants change by seasonal fluctuations, so their dose pattern for therapeutic efficacy also gets influenced. Seasonal impact show changes in important constituents like polyphenol, flavonoids, glycosides, alkaloids, essential oil etc. Late summer is the best collection time for essential oil component. Winter and rainy are best season for other secondary metabolites. The selected plant i.e. Justicia adhatoda, belongs to alkaloidal antidiabetic category. It was evaluated for pharmacognostic study which includes macroscopic and microscopic evaluation, determination of physicochemical parameters in a systematic way. HPTLC fingerprinting for vasicine was done. Study was performed for plant material with three different seasons and best results were analysed. It showed correct taxonomy with specific morphological, microscopical and physico-chemical parameters which is helpful for the standardization of drugs. Extracts showed presence of alkaloids, terpenes, flavonoids, steroids, phenolics, saponin and carbohydrate. HPTLC fingerprinting confirmed the presence of vasicine in the plant extracts. Seasonal variations occur in plant constituent shows best collection period. Current research aims to focus on best possible season for the harvesting of some pharmaceutically important plant materials.


Secondary metabolites, Herbal medicines, alkaloids, antidiabetic, seasonal variations

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