La Raíz, definición, funciones, partes y tipos de raíces
Ing. Luis Peñarreta Colegio Agropecuario Padre Miguel Gamboa
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Definición •
La raíz es el órgano perteneciente a las plantas que se introduce en la tierra para absorber las sustancias necesarias para que el vegetal crezca y se desarrolle.
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Funciones de la Raíz de los vegetales •
La raíz es el órgano de la planta, generalmente subterráneo, encargado de sujetar la planta en la tierra, absorber las sales minerales y el agua del suelo, y transportarlas al resto de la planta. También actúa como órgano de reserva, acumulando sustancias que luego
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Partes de la Raíz • •
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Las partes de la raíz son: Cuello: parte de la raíz, situada a nivel de la superficie del suelo, que comunica el tallo con la raíz. Zona suberificada o de ramificación : zona comprendida entre el cuello y la zona pilífera, en donde comienzan a formarse las raíces secundarias. Zona pilífera o de pelos absorbentes : zona comprendida entre la zona suberificada y la zona de crecimiento, que está cubierta de pelos que absorben las sales minerales y el agua del suelo. Presenta una forma cónica, con los pelos inferiores más cortos que los superiores.
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Tipos de Raíces •
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Según su origen. Según su forma. Según su medio donde viven. Según su duración. Según su consistencia. consistencia.
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Según su origen •
Normales. son aquellas que provienen de la radícula del embrión, comprende la raíz principal y secundaria.
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Adventicias.
Son aquellas que no provienen de la radícula y se encuentran en el tallo, ramas ramas o hojas.
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Según su forma •
Napiforme
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Según su forma •
Tuberosas.
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Por el Medio donde Viven •
Raíces Terrestre:
Raíces Aéreas:
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Por el Medio donde Viven •
Raíces acuáticas:
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Raíces Epifitas:
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Por su duración: Anual
Bianuales
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Clasificación de las Raices
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