Video Experimental Relacionado
Updated: Jan 22, 2026
10:35
A Protocol for Conducting Rainfall Simulation to Study Soil Runoff
Published on: April 3, 2014
21.4K
Un nuevo punto de vista sobre cómo las raíces se adaptan a las lluvias esporádicas
Bipin K Pandey1, Malcolm J Bennett1
1Plant and Crop Sciences, School of Biosciences, University of Nottingham, UK.
Cell
|July 13, 2019
Resumen
Los investigadores identificaron un nuevo gen que regula el ángulo de la raíz, crucial para la absorción de nutrientes y agua de las plantas. Este descubrimiento mejora la aptitud de las plantas, particularmente en entornos con precipitaciones impredecibles.
Área de la Ciencia:
- Biología vegetal
- La genética
- Agronomía
Sus antecedentes:
- La arquitectura de las raíces es vital para la supervivencia de las plantas, lo que afecta a la adquisición de nutrientes y agua.
- La aptitud de las plantas está significativamente influenciada por la capacidad de adaptarse a las tensiones ambientales como la sequía.
Objetivo del estudio:
- Para identificar nuevos genes que controlan la arquitectura del sistema de raíces.
- Aclarar los mecanismos moleculares que vinculan los rasgos de las raíces con la adaptación de las plantas.
- Comprender cómo la regulación del ángulo de raíz afecta el rendimiento de la planta bajo escasez de agua.
Principales métodos:
- Identificación y caracterización de genes.
- Clonado molecular y análisis de las vías reguladoras.
- Análisis fenotípico del crecimiento de las plantas en diferentes condiciones de agua.
Principales resultados:
- Se descubrió un nuevo gen regulador que controla la determinación del ángulo de raíz dependiente de la auxina.
- El mecanismo identificado demuestra un vínculo directo entre el ángulo de raíz y la eficiencia de recolección de agua.
- Las plantas con ángulos de raíz optimizados mostraron una mejor aptitud bajo lluvias variables simuladas.
Conclusiones:
- El estudio revela un regulador genético clave para la arquitectura del sistema de raíces.
- Este hallazgo proporciona una base molecular para mejorar la resistencia de los cultivos a la sequía.
- La orientación hacia esta vía ofrece un potencial para mejorar la productividad agrícola en las regiones con poca agua.
Videos de Conceptos Relacionados
01:13Contact Angle
18.3K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
18.3K
01:27Open Angle Glaucoma: Treatment
969
In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Drugs such as carbonic anhydrase inhibitors, α2- and...
969
03:02Primary and Secondary Growth in Roots and Shoots
60.2K
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
60.2K
01:13Angle of Twist: Problem Solving
762
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the torque...
762
01:28Angle Closure Glaucoma: Treatment
1.2K
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
1.2K
01:25Design Example: Traverse Angle Computations
315
Traverse angle computations are a critical component of surveying, used to compute the internal angles within a closed traverse. A traverse consists of a series of connected lines forming a closed loop, often used for land boundary delineation or mapping. Calculating the internal angles ensures accuracy in the traverse geometry and is essential for checking survey data integrity.The process begins with known azimuths and bearings of the traverse sides. Internal angles at each vertex are...
315