Management of stockplant for the in vitro culture of nodal segments of guava (Psidium guajava L.)


Abstract:

Nodal segments collected from shoots of adult grafts on juvenile root-stocks from seedlings grown under full sun and shade (40%), and from adult plants grown without and with shade (80%) were cultivated in vitro. In addition, nodal segments from field grown plants were cultivated in vitro under the following conditions: control; sixty days after dormex (hydrogenated cyanamide 49%) application at 2% and 4%; sixty days after partial pruning; and 75 days of 80% shading. Sixty days after culture initiation, seedlings and adult plants under shade produced no browning expiants. The highest percentage of budbreak (PBB) (100%) was obtained at 20 days in explants of seedlings; at 40 days in explants of adult plants under shade. At sixty days, adult and grafted plants without shade presented 40% and 35% browning explants, respectively, and 85% and 80% budbreak expiants, respectively. At sixty days, the control treatment produced 65% budbreak; the dormex treatment with the concentrations of 2% and 4%, 80% and 70% PBB, respectively; the partial pruning, 65%. Dormex application at 2% increased PBB and percentage of leaves formed to more than that of the control.

Año de publicación:

2004

Keywords:

  • Adult plants
  • Hydrogenated cyanamide
  • Shading
  • Seedlings
  • pruning

Fuente:

scopusscopus

Tipo de documento:

Article

Estado:

Acceso restringido

Áreas de conocimiento:

  • Ciencia agraria
  • Ciencias Agrícolas

Áreas temáticas:

  • Agricultura y tecnologías afines
  • Huertos, frutas, silvicultura
  • Cultivos de campo y plantaciones