Double lysis: an integrative time-saving method yielding high-quality RNA from strawberry

Area of Science:

• Plant Molecular Biology
• Biochemistry

Background:

• Strawberry tissues (leaves, fruits) are rich in secondary metabolites (phenolics, pigments) that hinder high-quality RNA isolation.
• Existing RNA isolation protocols are often costly, time-consuming, or inefficient for recalcitrant plant samples.

Purpose of the Study:

• To develop a novel, efficient, and cost-effective RNA isolation method for strawberry tissues.
• To overcome challenges posed by high phenolic and pigment content in strawberry RNA extraction.

Main Methods:

• A new "double lysis" RNA isolation protocol was developed.
• This method integrates CTAB and Trizol reagents for enhanced lysis and purification.
• The protocol was tested on strawberry leaves, fruits, petals, and roots.

Main Results:

• The double lysis method yielded RNA of significantly improved purity and quality compared to conventional Trizol protocols.
• High 260/280 (2.06-2.07) and 260/230 (2.07-1.75) ratios indicated minimal contamination.
• Isolated RNA was white, signifying effective removal of polyphenolics and pigments, unlike the reddish precipitates from the Trizol method.
• RNA integrity was preserved, enabling successful genomic DNA removal, efficient cDNA synthesis, and RT-PCR.

Conclusions:

• Double lysis is a robust, cost-effective, and time-saving RNA isolation protocol.
• It effectively isolates high-quality RNA from phenolics-rich strawberry tissues.
• The method is suitable for various strawberry tissues, including leaves, fruits, petals, and roots.