1. CONICET
  2. S&T Productions
Science and Technology Production
In vitro and ex vitro germination of three Handroanthus species (Bignoniaceae)

Article

Authorship
LARRABURU, EZEQUIEL ENRIQUE
Date
2016
Publishing House and Editing Place
Instituto de Botánica del Nordeste
Magazine
BONPLANDIA, vol. 25 (pp. 5-15) Instituto de Botánica del Nordeste
Summary Information provided by the agent in SIGEVA
Northwest of Argentina and have germination and conservation problems in their natural habitats. The germination of seeds under controlled conditions is an alternative that ensures the propagation. In this integrated study, in vitro and ex vitro germination, seed characteristics and seedling morphology of three species were analyzed. The length and width of the seeds, the width of the wings, the width and length of the seed body and embryo were measured. The germination capacity of the three sp... Northwest of Argentina and have germination and conservation problems in their natural habitats. The germination of seeds under controlled conditions is an alternative that ensures the propagation. In this integrated study, in vitro and ex vitro germination, seed characteristics and seedling morphology of three species were analyzed. The length and width of the seeds, the width of the wings, the width and length of the seed body and embryo were measured. The germination capacity of the three species was determined during 12 months after seed harvesting, carrying out ex vitro and in vitro germination trials. The seeds and embryos of H. impetiginosus were significantly larger than those of other species. Handroanthus impetiginosus seeds maintained a high germination capacity over the 12 months (95%). Seed germination capacity of H. ochraceus gradually decreased four months after seed collection (63 to 47%), whereas that of H. lapacho decreased abruptly after eight months. No significant differences were observed between ex vitro and in vitro methods in H. impetiginosus and H. ochraceus. In the three species, the germination capacity is directly proportional to the size of seeds and seedlings.
Show more Show less
Key Words
H. OCHRACEUSH. LAPACHOHANDROANTHUS IMPETIGINOSUSSEEDLINGSEED