A Comparative Study on Extraction Methods of Total RNA from Leaves of Acer truncatum ‘Luhong No.1’

Leaves of Acer truncatum ＇ Luhong No. 1 ＇ contain large amounts of polysaccharides and polyphenols, which seriously affect extraction yield and quality of total RNA. In order to explore the appropriate total RNA extraction method, total RNA was extracted from leaves of A. truncatum ＇ Luhong No. 1 ＇ with three methods, including kit method, Trizol method and modified CTAB method. The results showed that ODE6o/OD2so and OD^o/OD2ao ratios of total RNA extracted from leaves of A. truncatum ＇ Luhong No. 1 ＇ with kit method were higher than 1.8, with a general yield and certain level of DNA contamination ; OD^o/OD~ and OD^o/OD^o ratios of total RNA extracted with Trizol method were about 1.5, with the lowest yield; OD260/OD280 and OD260/OD230 ratios of total RNA extracted with modified CTAB method were about 2.0, with the highest yield and distinct eleetrophoresis patterns. The results demonstrated that total RNA extracted with modified CTAB method exhibited high yield and purity, which could meet the demands of subsequent molecular biology research. Thus, modified CTAB method is the appro- oriate method for extracting total RNA from leaves of A. truncatum ＇ Luhong No. 1 ＇

‘鲁红一号’元宝枫叶片总RNA提取方法的比较研究

‘鲁红一号’元宝枫叶片中富含大量多糖、多酚物质,严重影响了总RNA提取的产率和质量。为了找出适宜‘鲁红一号’元宝枫叶片总RNA提取的方法,本试验运用试剂盒法、TRIZOL法和改良CTAB法提取其秋季叶片总RNA。结果表明,试剂盒法提取的叶片总RNA OD260/OD280、OD260/OD230均在1.8以上,但产率一般,有DNA污染;TRIZOL法提取的总RNA OD260/OD280、OD260/OD230均在1.5左右,且产率最低;改良CTAB法提取的总RNA OD260/OD280、OD260/OD230均在2.0左右,且产率最高,电泳图较清晰。说明采用改良CTAB法提取的叶片总RNA质量和产率高,可以满足分子生物学进一步研究的需求,是‘鲁红一号’元宝枫叶片总RNA提取的适宜方法。