El poder de movimiento en las plantas
- Idioma:
- inglés
- Estado:
- Obra completa
- Autoría:
- Escrita por el autor
- Estado del texto:
- Sin ruido de escaneo detectado (medición automática sobre todo el texto, no revisada a mano)
- Extensión:
- ~200.000 palabras · 955 pasajes
Cita esta obra
- APACharles Darwin. (n.d.). The Power of Movement in Plants [El poder de movimiento en las plantas]. Digital reproduction: SigPhi. https://sigphiai.com/es/works/charles-darwin/the-power-of-movement-in-plants
- MLACharles Darwin. The Power of Movement in Plants [El poder de movimiento en las plantas]. Digital reproduction, SigPhi, https://sigphiai.com/es/works/charles-darwin/the-power-of-movement-in-plants.
- ChicagoCharles Darwin. The Power of Movement in Plants [El poder de movimiento en las plantas]. Digital reproduction, SigPhi. https://sigphiai.com/es/works/charles-darwin/the-power-of-movement-in-plants.
Referencia de la edición que reproduce SigPhi: SigPhi es su reproducción digital, no el editor. El año de la edición no consta en los metadatos (por eso «n.d.») y el traductor solo aparece cuando consta.
De qué trata
El estudio de cómo se mueven las plantas: la circunnutación, el giro constante de la punta que crece, y la respuesta a la luz, a la gravedad y al contacto.
Contexto e historia
Publicado en 1880, y escrito con su hijo Francis, que hizo buena parte de los experimentos; la portada lo declara y el catálogo no, de modo que conviene decirlo. Es el último libro grande de Darwin y el más experimental: tapan puntas de raíz con caperuzas minúsculas, proyectan luz de lado, miden desviaciones a lo largo de horas. Al final propone que la punta de la raíz actúa como un centro que dirige el movimiento del resto, idea que quedó de lado un siglo y que la fisiología vegetal reciente ha vuelto a discutir.
Contexto editorial, no una fuente citable: a diferencia de los pasajes de la obra, estos datos no se pueden comprobar contra el corpus.
remained stationary for about an hour, and then probably growth occurred on the side opposite to that which caused the geotropic curvature. In the case previously described the basal part of the very short radicle from being turned vertically upwards, was at first very little affected by geotropism. Filaments were affixed in two other instances to rather longer radicles protruding obliquely from seeds which had been turned upside down; and in these cases the lines traced on the horizontal glasses were only slightly zigzag, and the movement was always in the same general direction, through the action of geotropism. All these observations are liable to several causes of error, but we believe, from what will hereafter be shown with respect to the movements of the radicles of other plants, that they may be largely trusted. Fig. 2. Brassica oleracea: circumnutating and geotropic movement of radicle, traced on horizontal glass during 46 hours. Hypocotyl.—The hypocotyl protrudes through the seed-coats as a rectangular projection, which grows rapidly into an arch like the letter U turned upside down; the cotyledons being still enclosed within the seed. In whatever position the seed may be embedded in the earth or otherwise fixed, both legs of the arch bend upwards through apogeotropism, and thus rise vertically above the ground. As soon as this has taken place, or even earlier, the inner or concave surface of the arch grows more quickly than the upper or convex surface; and this tends to separate the two legs and aids in drawing the cotyledons out of the buried seed-coats. By the growth of the whole arch the cotyledons are ultimately dragged from beneath the ground, even from a considerable depth; and now the hypocotyl quickly straightens itself by the increased growth of the concave side.…