Coverage effect on hardening of arrow cane (Gynerium sagitatum Aubl.) micropropagated plants
Efecto de cobertura en el endurecimiento de plantas micropropagadas de caña flecha (Gynerium sagitatum Aubl.)
DOI:
https://doi.org/10.15446/rfnam.v74n2.87294Keywords:
Arrow cane, micropropagation, plastic coverage, surviva, trasplanting (en)Caña flecha, cubierta plástica, micropropagación, supervivencia, trasplante (es)
To evaluate the effect of plastic film coverage on ex vitro acclimatization of arrow cane (Gynerium sagitatum Aubl.), shoots of “Criolla”, Martinera” and “Costera” cultivars were in vitro micropropagated in a medium supplied with 6-Benzylaminopurine and half of them were rooted in a medium with 1-Naphtalene acetic acid. Rooted and unrooted shoots were transplanted in a shade house with fog irrigation, into plastic trays (72 clusters per tray), using peat as substrate and half of them was covered with translucent plastic film during 5 days after transplant while the other half was maintained uncovered. The experiment consisted of a three-way factorial arrangement with 12 treatments distributed with a split-plot design where tray coverage was the main plot, cultivars were the split, and rooting condition was the split-plot. Each treatment (36 clusters) was repeated three times for a total of 1296 experimental units. After 40 days in the shade house, the survival rate was calculated, and plant heigth, number of shoots and number of roots data were analyzed by ANOVA (P<0.05) and means were separated by Tukey test (P<0.05). Plant survival was complete (100%) regardless of genotype, rooting, or coverage condition. Transferring plant into uncovered trays statistically resulted in higher levels for plant height, number of shoots, and number of roots. Ex vitro adaptation of micropropagated arrow cane plants without plastic film covers increased plant growth and reduced labor.
Para evaluar el efecto de cubiertas de plástico en la aclimatación ex vitro de plantas micropropagadas de caña flecha (Gynerium sagitatum Aubl.), brotes de los cultivares “Criolla”, “Martinera” y “Costera” fueron multiplicados en un medio con 6-Bencilaminopurina y la mitad de ellos posteriormente enraizados en un medio con 1-Acido Naftaleno acético. Ambos grupos de plantas fueron trasplantados bajos una polisombra, en bandejas plásticas (72 clústeres por bandeja) conteniendo turba como sustrato, la mitad con cubierta plástica transparente durante 5 días y la otra mitad sin cubierta. El experimento consistió en un arreglo de tres factores con 12 tratamientos distribuidos con un diseño de parcelas subdivididas, donde la cubierta fue la parcela principal, el cultivar la subparcela y la condición de enraizamiento la sub-sub parcela. Después de 40 días del trasplante, se calculó la tasa de supervivencia. Los datos de altura de planta, número de brotes y número de raíces fueron analizados por medio de ANOVA (P<0,05) y los promedios separados con la prueba de Tukey (P<0,05). La supervivencia de las plantas fue total (100%) independientemente de la cubierta, el genotipo y el enraizamiento de los brotes. La transferencia en bandejas sin cubiertas resultó en alturas de planta, y número de tallos y raíces estadísticamente mayores. La adaptación ex vitro de plantas micropropagadas de caña flecha en bandejas sin cubierta de plástico incrementó el crecimiento de las plantas y redujo la mano de obra.
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