Journal of Environmental Biology

Seasonal variation of antibacterial activities in the

green alga Ulva pertusa Kjellman

Jae-Suk Choi¹, Yu-Mi Ha¹, Bo-Bae Lee¹, Hye Eun Moon¹, Kwang Keun Cho² and In Soon Choi^1,3*

¹RIS Center, Industry-Academic Cooperation Foundation, Silla University, Busan 617 736, Republic of Korea

²Department of Animal Resources Technology, Gyeongnam National University of Science and Technology,

150 Chilam-dong, Jinju, Gyeongnam, 660 758, Republic of Korea

³Department of Biological Science, Silla University, Busan 617 736, Republic of Korea

*Corresponding Author E-mail: ischoi@silla.ac.kr

Publication Data

Paper received:

29 September 2012

Revised received:

27 February 2013

Accepted:

05 June 2013

Abstract

The present study was performed to screen out the extracts of algae and assess the seasonal variation in antimicrobial activity of Ulva pertusa against Gardnerella vaginalis. Seasonal variation in antibacterial activity was observed, with the extracts showing no activity during summer and autumn, and showing antibacterial activity from early winter (December) to middle spring (April). The maximum value of antimicrobial activity (6.5 mm inhibition zone at 5 mg disk^-1) of U. pertusa against G. vaginalis was observed in April. Otherwise, for both chlorophyll a and b, the highest content (2.87 mg g^-1 and 1.37 mg g^-1) was observed in March 2009. These results may reflect variation in cellular chemical compositions such as secondary metabolite(s) rather than chlorophyll and biological activities according to season.

 Key words

Antimicrobial activity, Gardnerella vaginalis, Seasonal variation, Ulva pertusa

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