vitÓria rÉgia do amazonas - sua origem
TRANSCRIPT
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Victoria regiaVictoria regia
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La Victoria regia, también llamada Victoria amazónica, es un lirio o nenúfar de agua, es el
más grande de todos los lirios de agua.
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El nombre específico de Victoria regia está dedicado a la reina Victoria de Inglaterra, ya que fue descrita por botánicos ingleses en el s. XIX,
pero se cambiaría posteriormente a Victoria amazónica haciendo alusión al sitio de su
descubrimiento.
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Es una planta nativa de América meridional, incluyendo el río Amazonas. Su hogar tropical
acuático se extiende por Brasil, Colombia, Perú y Guyana; en Guyana se la considera la flor
nacional.
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La Victoria se caracteriza por tener hojas circulares que pueden llegar a superar los 2 metros de diámetro que
flotan sobre la superficie.
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La hoja está sostenida por un largo pecíolo que la une a un rizoma sumergido que se hunde en
el lodo.
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Los bordes perpendiculares de 10-20 cm, de color verde y reticulados por la cara superior,
rojizos y con la nerviación dispuesta en espiral en la cara que se hallan en contacto con el
agua.
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Este reborde impide que el agua la penetre lo que le permite sostener grandes pesos, pueden llegar a soportar hasta 40 kilos si el peso se encuentra bien distribuido en su superficie por lo que es común ver aves y pequeños
mamíferos reposando sobre ellas.
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La planta está armada por todas partes, excepto por la superficie, con espinas, que las
protegen de depredadores.
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El jugo extraído de sus raíces lo utilizan los indígenas de la región del Amazonas como tinte
negro para el cabello.
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Su f lor mide siempre más de 4 cm de diámetro (su floración ocurre desde inicio de marzo hasta julio) es
blanca y se abre apenas anochece, a partir de las seis de la tarde, exhalan una divina fragancia
nocturna parecida al albaricoque, llamada por los europeos de "rosa lacustre", se mantiene abierta
hasta aproximadamente las nueve horas de la mañana del día siguiente, que se vuelve a cerrar.
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En el segundo día, el de la polinización, la flor se abre de nuevo al atardecer y cambia su
color a rosa.
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Cuando la flor es de color blanco y es femenina, sólo el estigma está maduro y
puede recibir polen.
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La segunda noche cuando es rosada, es masculina, las anteras han madurado y produce
polen que sirve para fecundar otras flores.
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La flor muestra su esplendor sólo dos días. Se abre en el atardecer, la flor blanca, con un fuerte olor frutal y más
caliente que el ambiente en el interior de 5 a 10 °C. Este calor y olor atraen a los escarabajos polinizadores de la
especie Cylocephata castaneal. Por la mañana, la flor se cierra y se convierte en la prisión del escarabajo. Sólo en la tarde del segundo día la flor se abre una vez más, esta vez rosa fuerte y sin olor. Entretanto, los escarabajos se cargan con polen, que llevan a la próxima flor fragante
blanca.
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Actualmente existen numerosas variedades gracias a las nuevas biotecnologías con las que es posible controlar el tamaño de las
hojas; por esta razón se usan mucho en el paisajismo urbano, tanto en grandes lagos,
como en pequeños espejos de agua.
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Crecieron en cultivo por primera vez en 1849, en un invernadero construido en Inglaterra
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El primer botánico en encontrar un nenúfar gigante fue Tadeo Javier Peregrino Haenke , en Bolivia, en 1801.
Más tarde, otros botánicos los encontraron en Paraguay, Brasil y la Guayana británica. Las primeras semillas llegaron en agosto de 1846 a Londres, de las que se obtuvieron tan sólo dos plantas en los Reales Jardines Botánicos de Kew, que perecieron pronto.
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Tas varios intentos por fin, el jardinero del Duque de Devonshire, Joseph Paxton, en noviembre de 1849 fue el primero en conseguirlo gracias a haber hecho
una réplica del hábitat caluroso y pantanoso del nenúfar (esfuerzo gigantesco de lucha contra el invierno inglés con la ayuda sólo de estufas de
carbón),
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Anne Paxton (hija de Joseph Paxton) demostrando la capacidad de una hoja de V. amazonica de soportar su peso.
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El Duque de Devonshire le presentó a la reina Victoria, a través de Paxton, la primera de estas flores, que había sido
originalmente nombrada en su honor.
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Fin