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Colloids Surf B Biointerfaces. 2005 May 25;42(3-4):259-62.

A method for isolating functional RNA from callus of Dendrobium candidum contented rich polysaccharides.

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Key Laboratory for Biomechanics and Tissue Engineering under the State Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, China.


Isolation of high-quality RNA from Dendrobium candidum is particularly difficult. D. candidum contains considerable amounts of polysaccharides that coprecipitate with RNA, which render RNA unsuitable for either cDNA synthesis and/or PCR amplification. In this paper, a rapid and efficient method was described for functional RNA isolation from the callus of D. candidum. The procedure included: (i) an extraction with phenol and isopropyl alcohol, to remove proteins and polyphenols; (ii) purifications by lithium chloride, pre-cooled (-20 degrees C) ethanol successively to remove polysaccharides. The method resulted in high-quality RNA suitable for DDRT-PCR and cDNA library analysis finally.

[Indexed for MEDLINE]

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