Journal of Applied Phycology

, Volume 25, Issue 5, pp 1277–1285 | Cite as

A simple and effective method for RNA isolation and cDNA library construction from the brown seaweed Sargassum polycystum (Fucales, Phaeophyceae)

  • Mei-Chea Sim
  • Chai-Ling Ho
  • Siew-Moi PhangEmail author


The isolation of high-quality RNA from brown seaweeds has always been problematic due to a high content of polyphenolic compounds and polysaccharides in their tissues. This study presents a simple and effective method for isolating high-quality RNA from the brown seaweeds Sargassum (Sargassum polycystum, Sargassum siliquosum, Sargassum baccularia, and Sargassum binderi), Padina tetrastromatica, Turbinaria conoides, Dictyota sp., and Hormophysa cuneiformis using cetyltrimethylammonium bromide and selective lithium chloride precipitation. Approximately 25–43 μg g−1 fresh weight of total RNA was obtained from these brown algae. The A 260/A 280 absorbance ratio of these RNA samples are between 1.995 ± 0.027 and 2.122 ± 0.013, with distinct 28S and 18S ribosomal RNA bands visible on a formaldehyde agarose gel. The RNA obtained from S. polycystum was found to be suitable for many downstream applications such as reverse transcription polymerase chain reaction, cloning, synthesis of cDNA, and construction of cDNA library for the generation of expressed sequence tags.


cDNA library construction CTAB RNA isolation Sargassum polycystum Phaeophyta Biotechnology 



This work was supported by the eScienceFund project (05-01-03-SF0188) from the Ministry of Science, Technology and Innovation Malaysia and the Postgraduate Research Fund (PS081/2007B). The first author was supported by a postgraduate fellowship of the University of Malaya, Kuala Lumpur, Malaysia.


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Institute of Biological Sciences, Faculty of ScienceUniversity of MalayaKuala LumpurMalaysia
  2. 2.Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular SciencesUniversiti Putra MalaysiaSerdangMalaysia
  3. 3.Institute of Ocean and Earth Sciences (IOES)University of MalayaKuala LumpurMalaysia

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