PT  - JOURNAL ARTICLE
AU  - Pious Thomas
AU  - John W. Schiefelbein
TI  - Improved Method for Purification of RNA from Stem Tissue of Grapevine and Its Use in mRNA Profiling
AID  - 10.5344/ajev.2002.53.3.231
DP  - 2002 Jan 01
TA  - American Journal of Enology and Viticulture
PG  - 231--234
VI  - 53
IP  - 3
4099  - http://www.ajevonline.org/content/53/3/231.short
4100  - http://www.ajevonline.org/content/53/3/231.full
SO  - Am J Enol Vitic.2002 Jan 01; 53
AB  - A procedure that does not involve an ultracentrifugation step for the isolation of functional RNA from recalcitrant grape stem tissue derived from both in vitro and in vivo sources has been optimized. The procedure used an extraction buffer containing a reducing agent, nuclease inhibitor, and mild detergents. RNA was purified from abundant carbohydrates, polyphenols, and other contaminating compounds with the use of insoluble polyvinylpyrrolidone, two cycles of potassium acetate precipitation, and lithium chloride differential dissolution. RNA appeared intact with prominent 28S and 18S rRNA bands, OD260/280 values ranging from 1.8 to 2.0, and yield ranging from 80 to 120 µg g-1 tissue. RNA was successfully used in mRNA differential display studies involving reverse transcription, polymerase chain reaction-amplification of cDNA, Northern hybridization, and cDNA probing to elucidate differential gene expression during rooting inductive phase. The procedure worked well for other tissues including leaf, petiole, root, and new shoots.Acknowledgments: PT acknowledges the award of Overseas Associateship by the Department of Biotechnology, Ministry of Science and Technology, Government of India, which facilitated the exchange visit program. The supply of grape Arka Neelamani culture from the Indian Institute of Horticultural Research, Bangalore, is also acknowledged.