Journal of Environmental Biology

Inhibitory effect of marine green algal extracts on germination of Lactuca sativa seeds

Jae-Suk Choi^1,2 and In Soon Choi^1,3*

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

? ²Division of Bioindustry, Silla University, Sasang-gu, Busan 617-736, Republic of Korea

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

*Corresponding Author E-mail: ischoi101@korea.com

Publication Data

Paper received:

19 June 2014

Revised received:

12 December 2014

Accepted:

22 April 2015

Abstract

The allelopathic potential of nine green seaweed species was examined based on germination and seedling growth of lettuce (Lactuca sativa L.). Out of nine methanol extracts, Capsosiphon fulvescens and Monostroma nitidum extracts completely inhibited germination of L. sativa at 4 mg/filter paper after 24 hr of treatment. Water extracts of these seaweeds generally showed low anti-germination activities than methanol extracts. Of the nine water extracts, Enteromorpha linza extract completely inhibited L. sativa germination at 16 mg/filter paper after 24 hrs. To identify the primary active compounds, C. fulvescens powder was successively fractionated according to polarity, and the main active agents against L. sativa were determined to be lipids (0.0% germination at 0.5 mg of lipids/paper disc). According to these results, extracts of C. fulvescens can be used to develop natural herbicidal agents and manage terrestrial weeds. ??  

 Key words

Anti-germination effect, Capsosiphon fulvescen, Green seaweed, Lactuca sativa

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