Artículo
BBX24 Interacts with JAZ3 to Promote Growth by Reducing della Activity in Shade Avoidance
Saura Sánchez, Maite; Chiriotto, Tai Sabrina
; Cascales, Jimena
; Gómez Ocampo, Jorge Gabriel
; Hernández García, Jorge; Li, Zheng; Pruneda Paz, José Luis; Blázquez, Miguel Angel; Botto, Javier Francisco
Fecha de publicación:
01/2023
Editorial:
Oxford University Press
Revista:
Plant And Cell Physiology
ISSN:
0032-0781
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Shade avoidance syndrome (SAS) is a strategy of major adaptive significance and typically includes elongation of the stem and petiole, leaf hyponasty, reduced branching and phototropic orientation of the plant shoot toward canopy gaps. Both cryptochrome 1 and phytochrome B (phyB) are the major photoreceptors that sense the reduction in the blue light fluence rate and the low red:far-red ratio, respectively, and both light signals are associated with plant density and the resource reallocation when SAS responses are triggered. The B-box (BBX)-containing zinc finger transcription factor BBX24 has been implicated in the SAS as a regulator of DELLA activity, but this interaction does not explain all the observed BBX24-dependent regulation in shade light. Here, through a combination of transcriptional meta-analysis and large-scale identification of BBX24-interacting transcription factors, we found that JAZ3, a jasmonic acid signaling component, is a direct target of BBX24. Furthermore, we demonstrated that joint loss of BBX24 and JAZ3 function causes insensitivity to DELLA accumulation, and the defective shade-induced elongation in this mutant is rescued by loss of DELLA or phyB function. Therefore, we propose that JAZ3 is part of the regulatory network that controls the plant growth in response to shade, through a mechanism in which BBX24 and JAZ3 jointly regulate DELLA activity. Our results provide new insights into the participation of BBX24 and JA signaling in the hypocotyl shade avoidance response in Arabidopsis.
Palabras clave:
BBX24
,
DELLAS
,
JAZ3
,
PHYTOCHROME B (PHYB)
,
SHADE AVOIDANCE SYNDROME (SAS)
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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
Saura Sánchez, Maite; Chiriotto, Tai Sabrina; Cascales, Jimena; Gómez Ocampo, Jorge Gabriel; Hernández García, Jorge; et al.; BBX24 Interacts with JAZ3 to Promote Growth by Reducing della Activity in Shade Avoidance; Oxford University Press; Plant And Cell Physiology; 64; 5; 1-2023; 474-485
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