An improved CTAB-ammonium acetate method for total RNA isolation from cotton

Area of Science:

• Plant Molecular Biology
• Biotechnology
• Agricultural Science

Background:

• Cotton is a vital economic crop, necessitating high-quality RNA for genetic and molecular research.
• Conventional RNA isolation methods are often inefficient for cotton due to high polyphenol and polysaccharide content.
• Existing protocols are typically time-consuming and laborious, hindering rapid analysis.

Purpose of the Study:

• To develop a streamlined and efficient protocol for isolating high-yield, high-quality RNA from cotton.
• The protocol aims to address the challenges of polyphenols and polysaccharides in cotton tissues.
• Focus on a rapid, simple, and cost-effective method for RNA extraction.

Main Methods:

• Adaptation of the cetyltrimethylammonium bromide (CTAB) protocol.
• Inclusion of phenol-chloroform and chloroform-isoamyl alcohol for impurity removal.
• Utilized ammonium acetate for RNA precipitation with reduced incubation times and low-temperature centrifugation to prevent degradation.

Main Results:

• The developed method isolates RNA in just 1.5 hours, suitable for various cotton tissues.
• Achieved high RNA purity with A260:A280 ratios between 1.80-1.85.
• Isolated RNA demonstrated integrity with clear 28s and 18s ribosomal RNA bands and was validated for downstream applications like RT-PCR and real-time qPCR.

Conclusions:

• The CTAB-ammonium acetate method provides an easy, rapid, and cost-effective solution for RNA isolation from challenging cotton samples.
• This protocol yields high-quality RNA suitable for diverse molecular biology applications.
• The efficiency of this method supports advanced genetic and developmental studies in cotton.