Effect Of Open Shade Conditions On The Phytochemical Content Of Some Medicinal Plants
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Fatusi, C. K
ABSTRACT: Vernonia amygdalina (bitterleaf), Tel/aria occidentalis (Fluted pumpkin) and Acalypha wilkesiana plants were grown under open field and open shade. V. amygdalin a is a used to treat stomach infections, T. accidentalis (Fluted pumpkin) is used as a blood tonic and Acalypha wilkesiana is effective in the treatment of skin infections. Plants were grown in planting bags placed in these sites. Results show that all the plant species have better vegetative growth under direct sunlight. However, phytochemical screenings of the leaves of the plants reveal that the effect of open shade conditions enhance the synthesis and accumulation of bioactive compounds with medicinal values. The effect is however not specific to the type of phytochemical but it is actually species specific. Open shade condition enhances the production and accumulation of flavonoids while it inhibits that of anthraquinone in V. amygdalina. Also, flavonoid content of T. occidentalis plants was enhanced under open shade conditions. The same conditions did not affect the flavonoid and anthraquinones content of A. wilkesiona but leaves of the plant under open shade conditions had higher concentration of tannin than those grown under open field condition. Saponin was also found present in A. wilkesiana plants grown under open shade condition while it was absent in those under open field conditions. The conclusion is that, though direct sunlight help ensure better vegetative growth, open shade enhance the synthesis and accumulation of bioactive compounds with medicinal values.
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Phytochemical , Medicinal Plants
Ade-Ademilua, O. E (2011) Effect Of Open Shade Conditions On The Phytochemical Content Of Some Medicinal Plants Being a Paper Presented At 37th Annual Conference of the South African Association of Botany holding in Rhodes University, Grahamstown, South Africa.