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:

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