Propagación in vitro de Phalaenopsis (Orchidaceae) mediante el cultivo de secciones de ejes florales después de la senescencia de las flores
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Jiménez García, Víctor
Guevara Berger, Eric
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Abstract
Segmentos nodales provenientes de inflorescencias senescentes de híbridos de Phalaenopsis fueron desinfectados dos veces y colocados en un medio sólido MS modificado bajo en calcio y con varios aditivos orgánicos (vitaminas, adenina, agua de coco, carbón activado, reguladores de crecimiento, sacarosa y glucosa). La presencia de carbón activado redujo los efectos negativos asociados a las sustancias fenólicas liberadas en el medio por las estacas. Se observaron tres tipos de respuesta: ausencia de crecimiento, crecimiento vegetativo y reproductivo. Las yemas vegetativas desarrollaron hojas y raíces, mientras que las florales formaron una inflorescencia compuesta por varios segmentos nodales. Estos se sec-cionaron y subcultivaron en un medio fresco, en el cual iniciaron crecimiento vegetativo. Después de seis meses de cultivo, los explantes enraizados fueron exitosamente transferidos a condiciones de invernadero.
Nodal cuttings from senescent flower stalks of Phalaenopsis hybrids were desinfected twice and put on modified MS media low in calcium and containing organic additives (vitamines, adenine, coconut milk, activated charcoal, growth regulators, sucrose and glucose). Activated charcoal reduced the negative effects of phenolic substances released by the explant. Three different responses were observed: no growth, vegetative growth and reproductive growth. Vegetative buds rapidly produced leaves and roots. Flower buds developed into an inflorescence with nodal segments. These were cut and subcultivated on a fresh medium, where they started vegetative growth. After six months, rooted explants were successfully transferred to greenhouse conditions.
Nodal cuttings from senescent flower stalks of Phalaenopsis hybrids were desinfected twice and put on modified MS media low in calcium and containing organic additives (vitamines, adenine, coconut milk, activated charcoal, growth regulators, sucrose and glucose). Activated charcoal reduced the negative effects of phenolic substances released by the explant. Three different responses were observed: no growth, vegetative growth and reproductive growth. Vegetative buds rapidly produced leaves and roots. Flower buds developed into an inflorescence with nodal segments. These were cut and subcultivated on a fresh medium, where they started vegetative growth. After six months, rooted explants were successfully transferred to greenhouse conditions.
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584.4 Orquídeas
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https://revistas.ucr.ac.cr/index.php/agrocost/index