Artículo
Faster photosynthetic induction in tobacco by expressing cyanobacterial flavodiiron proteins in chloroplasts
Gomez, Rodrigo Lionel
; Carrillo, Nestor Jose
; Morelli, María Paula
; Tula, Suresh; Shahinnia, Fahimeh; Hajirezaei, Mohammad Reza; Lodeyro, Anabella Fernanda
Fecha de publicación:
05/2018
Editorial:
Springer
Revista:
Photosynthesis Research
ISSN:
0166-8595
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Plants grown in the field experience sharp changes in irradiation due to shading effects caused by clouds, other leaves, etc. The excess of absorbed light energy is dissipated by a number of mechanisms including cyclic electron transport, photorespiration, and Mehler-type reactions. This protection is essential for survival but decreases photosynthetic efficiency. All phototrophs except angiosperms harbor flavodiiron proteins (Flvs) which relieve the excess of excitation energy on the photosynthetic electron transport chain by reducing oxygen directly to water. Introduction of cyanobacterial Flv1/Flv3 in tobacco chloroplasts resulted in transgenic plants that showed similar photosynthetic performance under steady-state illumination, but displayed faster recovery of various photosynthetic parameters, including electron transport and non-photochemical quenching during dark–light transitions. They also kept the electron transport chain in a more oxidized state and enhanced the proton motive force of dark-adapted leaves. The results indicate that, by acting as electron sinks during light transitions, Flvs contribute to increase photosynthesis protection and efficiency under changing environmental conditions as those found by plants in the field.
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Articulos(IBR)
Articulos de INST.DE BIOLOGIA MOLECULAR Y CELULAR DE ROSARIO
Articulos de INST.DE BIOLOGIA MOLECULAR Y CELULAR DE ROSARIO
Citación
Gomez, Rodrigo Lionel; Carrillo, Nestor Jose; Morelli, María Paula; Tula, Suresh; Shahinnia, Fahimeh; et al.; Faster photosynthetic induction in tobacco by expressing cyanobacterial flavodiiron proteins in chloroplasts; Springer; Photosynthesis Research; 136; 2; 5-2018; 129-138
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