Control of root system architecture by DEEPER ROOTING 1 increases rice yield under drought conditions.
Nat Genet
; 45(9): 1097-102, 2013 Sep.
Article
en En
| MEDLINE
| ID: mdl-23913002
The genetic improvement of drought resistance is essential for stable and adequate crop production in drought-prone areas. Here we demonstrate that alteration of root system architecture improves drought avoidance through the cloning and characterization of DEEPER ROOTING 1 (DRO1), a rice quantitative trait locus controlling root growth angle. DRO1 is negatively regulated by auxin and is involved in cell elongation in the root tip that causes asymmetric root growth and downward bending of the root in response to gravity. Higher expression of DRO1 increases the root growth angle, whereby roots grow in a more downward direction. Introducing DRO1 into a shallow-rooting rice cultivar by backcrossing enabled the resulting line to avoid drought by increasing deep rooting, which maintained high yield performance under drought conditions relative to the recipient cultivar. Our experiments suggest that control of root system architecture will contribute to drought avoidance in crops.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Oryza
/
Genes de Plantas
/
Raíces de Plantas
/
Sitios de Carácter Cuantitativo
/
Sequías
Idioma:
En
Revista:
Nat Genet
Asunto de la revista:
GENETICA MEDICA
Año:
2013
Tipo del documento:
Article
País de afiliación:
Japón
Pais de publicación:
Estados Unidos