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Comparative analysis of essential oil composition and oil containing glands in Ocimum sanctum L. (Holy basil) under ambient and supplemental level of UV-B through gas chromatography–mass spectrometry and scanning electron microscopy

100%

Kumari R. , Agrawal S. B.

Acta Physiologiae Plantarum

2011

tom 33

nr 4

Field grown plants of holy basil (Ocimum sanctum L.) were treated with biologically effective supplemental ultraviolet-B (sUV-B) radiation (ambient +1.8 kJ m⁻² day⁻¹) to evaluate its effect on specialized oil glands and quantity and quality of the essential oil. The total yield of essential oil increased significantly by 42.0% after sUV-B treatment. Gas chromatography–mass spectrometry analysis showed that most important flavor compounds β-caryophyllene, germacrene-D, ethyl linoleolate, β-elemene and camphenol increased significantly after sUV-B treatment. Moreover, the level of main compound eugenol was not affected significantly. Scanning electron microscopy analysis showed turgidity of oil glands after sUV-B exposure and it was well correlated with the higher yield of essential oil. The result is of specific interest because if other parameters remain constant, sUV-B may affect the production of the essential oil in Ocimum sanctum L.

Spatiotemporal variation of alkaline phosphatase activity in coastal waters off Trivandrum

70%

Shivaramu M. S. , Randive A. K. , Kumari R. , Gauns M. , Ponnapakkam L. A.

nr 1