Inhibition of somatic embryo maturation in Sitka spruce [Picea sitchensis (Bong.) Carr.] by butylated hydroxytoluene, a volatile antioxidant released by parafilm

antioxidans bht biochemistry biochimie crecimiento croissance cultivo de tejidos culture de tissu desarrollo embrionario embryon somatique embryonic development fisiologia vegetal fitotoxicidad growth maturation metabolites metabolitos pepiniere phytotoxicity picea sitchensis plant nurseries plant physiology quinonas quinone quinones somatic embryos tissue culture viveros