Artículo
Cryptochromes are the dominant photoreceptors mediating heliotropic responses of Arabidopsis inflorescences
Serrano, Alejandro Miguel
; Vanhaelewyn, Lucas; Vandenbussche, Filip; Boccalandro, Hernan Esteban
; Maldonado, María Belén
; Van Der Straeten, Dominique; Ballare, Carlos Luis
; Arana, Maria Veronica
Fecha de publicación:
10/2021
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Plant, Cell and Environment
ISSN:
0140-7791
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Inflorescence movements in response to natural gradients of sunlight are frequently observed in the plant kingdom and are suggested to contribute to reproductive success. Although the physiological and molecular bases of light-mediated tropisms in vegetative organs have been thoroughly investigated, the mechanisms that control inflorescence orientation in response to light gradients under natural conditions are not well understood. In this work, we have used a combination of laboratory and field experiments to investigate light-mediated re-orientation of Arabidopsis thaliana inflorescences. We show that inflorescence phototropism is promoted by photons in the UV and blue spectral range (≤500 nm) and depends on multiple photoreceptor families. Experiments under controlled conditions show that UVR8 is the main photoreceptor mediating the phototropic response to narrowband UV-B radiation, and phototropins and cryptochromes control the response to narrowband blue light. Interestingly, whereas phototropins mediate bending in response to low irradiances of blue, cryptochromes are the principal photoreceptors acting at high irradiances. Moreover, phototropins negatively regulate the action of cryptochromes at high irradiances of blue light. Experiments under natural field conditions demonstrate that cryptochromes are the principal photoreceptors acting in the promotion of the heliotropic response of inflorescences under full sunlight.
Palabras clave:
ARABIDOPSIS THALIANA
,
CRYPTOCHROMES
,
HELIOTROPISM
,
INFLORESCENCE
,
UVR8
Archivos asociados
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Colecciones
Articulos (IFAB)
Articulos de INSTITUTO DE INVESTIGACIONES FORESTALES Y AGROPECUARIAS BARILOCHE
Articulos de INSTITUTO DE INVESTIGACIONES FORESTALES Y AGROPECUARIAS BARILOCHE
Articulos (IIBIO)
Articulos de INSTITUTO DE INVESTIGACIONES BIOTECNOLOGICAS
Articulos de INSTITUTO DE INVESTIGACIONES BIOTECNOLOGICAS
Articulos(IADIZA)
Articulos de INST. ARG DE INVEST. DE LAS ZONAS ARIDAS
Articulos de INST. ARG DE INVEST. DE LAS ZONAS ARIDAS
Articulos(IBAM)
Articulos de INST.DE BIOLOGIA AGRICOLA DE MENDOZA
Articulos de INST.DE BIOLOGIA AGRICOLA DE MENDOZA
Articulos(IFEVA)
Articulos de INST.D/INV.FISIOLOGICAS Y ECO.VINCULADAS A L/AGRIC
Articulos de INST.D/INV.FISIOLOGICAS Y ECO.VINCULADAS A L/AGRIC
Citación
Serrano, Alejandro Miguel; Vanhaelewyn, Lucas; Vandenbussche, Filip; Boccalandro, Hernan Esteban; Maldonado, María Belén; et al.; Cryptochromes are the dominant photoreceptors mediating heliotropic responses of Arabidopsis inflorescences; Wiley Blackwell Publishing, Inc; Plant, Cell and Environment; 44; 10; 10-2021; 3246-3256
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