PDIL1-2 can indirectly and negatively regulate expression of the AGPL1 gene in bread wheat
Biol. Res
;
52: 56-56, 2019. ilus, graf
Artigo
em Inglês
| LILACS
| ID: biblio-1505776
ABSTRACT
BACKGROUND:
ADP-glucose pyrophosphorylase (AGPase), the key enzyme in plant starch biosynthesis, is a heterotetramer composed of two identical large subunits and two identical small subunits. AGPase has plastidial and cytosolic isoforms in higher plants, whereas it is mainly detected in the cytosol of grain endosperms in cereal crops. Our previous results have shown that the expression of the TaAGPL1 gene, encoding the cytosolic large subunit of wheat AGPase, temporally coincides with the rate of starch accumulation and that its overexpression dramatically increases wheat AGPase activity and the rate of starch accumulation, suggesting an important role.METHODS:
In this study, we performed yeast one-hybrid screening using the promoter of the TaAGPL1 gene as bait and a wheat grain cDNA library as prey to screen out the upstream regulators of TaAGPL1 gene. And the barley stripe mosaic virus-induced gene-silencing (BSMV-VIGS) method was used to verify the functional characterization of the identified regulators in starch biosynthesis.RESULTS:
Disulfide isomerase 1-2 protein (TaPDIL1-2) was screened out, and its binding to the TaAGPL1-1D promoter was further verified using another yeast one-hybrid screen. Transiently silenced wheat plants of the TaPDIL1-2 gene were obtained by using BSMV-VIGS method under field conditions. In grains of BSMV-VIGS-TaPDIL1-2-silenced wheat plants, the TaAGPL1 gene transcription levels, grain starch contents, and 1000-kernel weight also significantly increased.CONCLUSIONS:
As important chaperones involved in oxidative protein folding, PDIL proteins have been reported to form hetero-dimers with some transcription factors, and thus, our results suggested that TaPDIL1-2 protein could indirectly and negatively regulate the expression of the TaAGPL1 gene and function in starch biosynthesis.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Proteínas de Plantas
/
Triticum
/
Pão
/
Genes de Plantas
/
Regulação da Expressão Gênica de Plantas
/
Glucose-1-Fosfato Adenililtransferase
Tipo de estudo:
Estudo prognóstico
Idioma:
Inglês
Revista:
Biol. Res
Assunto da revista:
Biologia
Ano de publicação:
2019
Tipo de documento:
Artigo
País de afiliação:
China
Instituição/País de afiliação:
Henan Agricultural University/CN
/
Henan Institute of Science and Technology/CN
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