Objective:To obtain total RNA with high quality from sunflower seeds induced by space flight.Methods:The grind powders in liquid nitrogen were transferred into extraction buffer containing SDS with equal volume of chloroform for extraction,and then extracted by acidic phenol,followed by precipitation overnight by LiCl.After digested by DNaseⅠ,polysaccharide was removed by precipitation with 1/2 volume of absolute ethanol,and finally the total RNA was precipitated with 1/10 volume of NaAc and 2 volume of abs...