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Título

Nitrogen fixation persists under conditions of salt stress in transgenic Medicago truncatula plants expressing a cyanobacterial flavodoxin

AutorCoba de la Peña, Teodoro ; Redondo, F. J.; Manrique, Esteban ; Lucas, M. Mercedes ; Pueyo, José Javier
Palabras claveMedicago truncatula
Flavodoxin
Nitrogen fixation
Salt stress
Symbiosis
Nodule
Fecha de publicación2010
EditorBlackwell Publishing
CitaciónPlant Biotechnology Journal (8): 1-12 (2010)
ResumenSeveral recent studies have demonstrated that the expression of a cyanobacterial flavodoxin in plants can provide tolerance to a wide range of environmental stresses. Indeed, this strategy has been proposed as a potentially powerful biotechnological tool to generate multiple-tolerant crops. To determine whether flavodoxin expression specifically increased tolerance to salt stress and whether it might also preserve legume nitrogen fixation under saline conditions, the flavodoxin gene was introduced into the model legume Medicago truncatula. Expression of flavodoxin did not confer saline tolerance to the whole plant, although the sensitive nitrogen-fixing activity was maintained under salt stress in flavodoxin-expressing plants. Our results indicate that flavodoxin induced small but significant changes in the enzymatic activities involved in the nodule redox balance that might be responsible for the positive effect on nitrogen fixation. Expression of flavodoxin can be regarded as a potential tool to improve legume symbiotic performance under salt stress, and possibly other environmental stresses.
Descripción12 pages, figures, and tables statistics.
Versión del editorhttp://dx.doi.org/10.1111/j.1467-7652.2010.00519.x
URIhttp://hdl.handle.net/10261/26017
DOI10.1111/j.1467-7652.2010.00519.x
ISSN1467-7652
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