Respuestas de crecimiento y desarrollo en Gypsophila paniculata a la ubicación de los esquejes en la planta madre y a tratamientos con bajas temperaturas
Growth and development responses in gypsophila paniculata as related to cutting position on the stock plant and to low temperature treatments
Keywords:
gypsophila paniculata, esquejes, planta madre, tratamientos, crecimiento desarrollo, baja temperatura, flores, localización (es)Downloads
O°C durante un mes y en el segundo ensayo durante dos meses; comparando las respuestas con las de testigos no almacenados. Las variables evaluadas fueron: longitud de la
planta, diámetro de la base del tallo veqetativa, número de ramificaciones, diámetro de cada ramificación floral y peso de las ramas florales. Se observó al finalizar los ensayos
que el tratamiento de vernalización de un mes no afecta significativamente la calidad de los esquejes enraizados ni su establecimiento posterior en el invernadero. Las tasas
de crecimiento de las plantas vernal izadas, con uno o dos meses de tratamiento, siempre fueron superiores a las de aquellas no almacenadas en frío, independientemente de su
localización original en la planta madre. El almacenamiento en frío por un mes no afectó la altura de las plantas, pero sí incrementó el grosor de los tallos vegetativos, especialmente
de las plantas provenientes de los tercios medio e inferior, además en estos mismos grupos disminuyó el número de ramificaciones vegetativas; las plantas más productivas
en el primer ensayo provenían de la zona media y se habían sometido durante un mes a 0°C. En el segundo ensayo los resultados no fueron concluyentes ya que por efecto
del enfriamiento durante dos meses, se presentaron diferencias en cuanto al número de plantas establecidas, lo cual originó una densidad de siembra desigual. Sin embargo,
el tratamientó con frío adelantó la floración en quince días.
Knowing the expansion that the non traditionals flowers sowing for exportation (Statice, Gerbera, Fresia, Gypsophila) has got in the last few years, this investigation was proposed in order to stablish the effects of cold storage and the localization of the cuttings on the mother plant, on some aspects of growing and development. For the experiment the cuttings were obtained from the medium, lower and upper thirds of the mother plant and with this material two tests were made; in the first one, rooted plants from the three layers were putted into a freezer at zero degrees for a 'perlod of one month and in the second one it was applied a cold treatment of two months. The results of each treatment were compared with a not treated testing plant. The evaluated variables were the plant length, the vegetative stem base diameter, the number of branches, the diameter of each floral branch and the floral branch weigth. At the end of the test it was seen that the one month freezing treatment does not affect significantly the rooted cuttings quality nor there subsecuently growing in winter cuarters. The frezzed
plants growing rates, with one or two months treatments, were always bigger than that of the non storaged plants, indepently of there original localization on the mother
plant. The one month cold storaqe had not effect on the plant heigth, but it did increase the vegetative stem diameter, specially on the plants obtained from the medium and
lower third, moreover in this same groups the number of vegetatives branches got smaller; the more productive plants of the first test carne from the medium third zone and they had a month treatment. The results in the second test were not clear because the two months freezing effect, there
was a difference on the number of grown plants, this caused a not equal sowing dansitv, nevertheless, the cold treatment produced an anticipated fifteen days flowering.
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