Fig. 1.

Profile of total RNA isolated by using five commercial kits. a Denaturing gel electrophoresis of total RNA isolated from peach. b Denaturing gel electrophoresis of total RNA from grapevine leaves. 50 mg of young peach and grapevine leaves (indicated as Y), and mature (M) grapevine leaves was used in RNA isolation with Spectrum™ Plant Total RNA kit (Sigma), RNeasy Plant mini kit (Qiagen), Plant/fungi total RNA kit (Norgen), AccuPrep viral RNA extraction kit (Bioneer) and TRIzol Reagent (Life Technologies). The total RNA yield (μg), A260/A280 and A260/A230 ratios averaged from two replicates are given below each gel panel. 28S rRNA, 18S rRNA and small RNAs are indicated with arrows. c Capillary electrophoresis of total RNA with Agilent Bioanalyzer. One ml of each of the total RNA preparations isolated using these five systems was used for the analysis with an Agilent Bioanalyzer 2100 equipped with an RNA Nano chip