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Biosynthesis of phenolic compounds and water soluble vitamins in culantro (Eryngium foetidum L.) plantlets as affected by low doses of gamma irradiation

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Author(s): Amina Abd El-Hamid ALY

Journal: Analele Universitatii din Oradea, Fascicula Biologie
ISSN 1224-5119

Volume: TOM XVII;
Issue: 2;
Start page: 356;
Date: 2010;
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Keywords: Eryngium foetidum L. | gamma irradiation | phenolic compounds | water soluble vitamins

ABSTRACT
Explants obtained from in-vitro propagated plantlets of Culantro (Eryngium foetidum L.) were exposed to four dose levels of γ-irradiation (0.0, 10.0, 20.0 and 40.0 Gy) to investigate the biosynthesis of phenolic compounds and water soluble vitamins in Culantro fresh plantlets. Among six identified phenolic compounds, the content of p-cumaric acid was the highest in the extracts, followed by caffeic acid, coumarin, benzoic acid, salicylic acid and apigenin. Significant increases were observed at dose 40.0 Gy (61.66 mg/g d.w. for flavonoids, 18.02 mg/g d.w, for flavonone and 5.06 mg/g d.w for anthocyanin) compared to control. On the other hand, the flavonols were decreased by increasing the irradiation dose. Vitamin C was increased in irradiated samples and this increase was in correlation with irradiation dose level. Thiamin, riboflavin and nicotinic acid were enhanced by the applied dose level 10 Gy. In addition, folic acid was enhanced by the dose levels 20 and 40 Gy and not detected for the control and 10 Gy treatments. Meanwhile, pyridoxine was decreased by increasing the irradiation dose level. The results obtained suggested that both low doses of γ-irradiation and tissue culture technique could be used to produce plantlets with high amount of phenolic compounds and water soluble vitamins.
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