Abstract:Embryogenic calli derived from mature zygotic embryos of loblolly pine (Pinus taeda L.) of three genotypes from Hunan Province, viz. Shaoyanghigh-2, Yongshunmiddle-1 and Yongshunmiddle-3 were used in embryogenic cell suspension culture. Parameters in the growth of cultures, including fresh weight, dry weight, packed cell volume, somatic embryo number, as well as pH, conditivity, and sucrose concentration of the culture medium were measured during culture period. The results showed that, during culture circl...