A Common method for high-high quality RNA extraction from plant tissues full of starch, proteins and fiber For grinding hard tissue or ligneous tissue, like cone scales from gymnosperms, the tissue was ground below liquid nitrogen in the mortar and pestle that was sterilized and baked (minimal 12 h at https://jasperncytp.total-blog.com/5-simple-techniques-for-cell-lysis-buffer-dna-extraction-54865655