title: [Changes in nucleic acid fractions during the germination of seeds of P. pinea. Effect of growth factors].
abstract: The application of indolacetic acid, gibberellic acid and kinetin increased the germination pattern of Pinus pinea seeds. Nucleic acid metabolism during germination has been investigated. Seeds grown in the presence of all these substances, contained higher amounts of total nucleic acid than the controls. Kinetin was the most active factor, increasing t-RNA, DNA-RNA and r-RNA levels in embryos and megagametophytes. On the other hand, gibberellic acid showed in the first stages of germination a selective action on the DNA-RNA complex and afterwards on the r-RNA fraction. Indolacetic acid showed mainly a stimulating effect on DNA-RNA and r-RNA fractions embryos; no significant changes were observed in megagametophytes.
mesh_terms: D004247:DNA / Q000032:analysis*; D005875:Gibberellins / Q000494:pharmacology; D007210:Indoleacetic Acids / Q000494:pharmacology; D007701:Kinetin / Q000494:pharmacology; D010937:Plant Growth Regulators / Q000494:pharmacology*; D012313:RNA / Q000032:analysis*; D012639:Seeds / Q000032:analysis* / Q000187:drug effects; D013268:Stimulation, Chemical; D014197:Trees
chemical_list: D005875:Gibberellins; D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; D012313:RNA; D004247:DNA; D007701:Kinetin
vernacular_title: Cambios en fracciones de ácidos nucleicos durante la germinación de semillas de P. pinea. Efecto de factores de crecimiento.