Rice F-bZIP transcription factors regulate the zinc deficiency response

• Tipo: Artigo em Revista Científica Internacional
• Data: 2020

Autores

Lilay, GH (Autor) Outra; Castro, PH (Autor) Outra; Guedes, JG (Autor) Outra; Almeida, DM (Autor) Outra; Campilho, A (Autor) FCUP; Azevedo, H (Autor) FCUP; Aarts, MGM (Autor) Outra; Saibo, NJM (Autor) Outra; Assuncao, AGL (Autor) Outra

Revista

Título: Journal of Experimental Botany

Vol. 71

Páginas: 3664-3677

ISSN: 0022-0957

Editora: Oxford University Press

Indexação

ISI Web of Knowledge - 30 Citações

Scopus - 42 Citações

Outras Informações

ID Authenticus: P-00S-HSM

DOI: 10.1093/jxb/eraa115

Abstract (EN): The F-bZIP transcription factors bZIP19 and bZIP23 are the central regulators of the zinc deficiency response in Arabidopsis, and phylogenetic analysis of F-bZIP homologs across land plants indicates that the regulatory mechanism of the zinc deficiency response may be conserved. Here, we identified the rice F-bZIP homologs and investigated their function. OsbZIP48 and OsbZIP50, but not OsbZIP49, complement the zinc deficiency-hypersensitive Arabidopsis bzip19bzip23 double mutant. Ectopic expression of OsbZIP50 in Arabidopsis significantly increases plant zinc accumulation under control zinc supply, suggesting an altered Zn sensing in OsbZIP50. In addition, we performed a phylogenetic analysis of F-bZIP homologs from representative monocot species that supports the branching of plant F-bZIPs into Group 1 and Group 2. Our results suggest that regulation of the zinc deficiency response in rice is conserved, with OsbZIP48 being a functional homolog of AtbZIP19 and AtbZIP23. A better understanding of the mechanisms behind the Zn deficiency response in rice and other important crops will contribute to develop plant-based strategies to address the problems of Zn deficiency in soils, crops, and cereal-based human diets.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14