bZIP17 regulates the expression of genes related to seed storage and germination, reducing seed susceptibility to osmotic stress
| Autor: | Irina Mitina, Adrián A. Moreno, Claudio Meneses, Paulina Arraño-Salinas, Ariel Orellana, Carlos Henríquez-Valencia, Nicolas Cifuentes-Esquivel, Francisca Blanco-Herrera, Jonathan Celiz-Balboa |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Osmotic shock Arabidopsis Cellular homeostasis Germination Biology 01 natural sciences Biochemistry Transcriptome 03 medical and health sciences Gene Expression Regulation Plant Osmotic Pressure medicine Arabidopsis thaliana Molecular Biology Transcription factor Arabidopsis Proteins food and beverages Cell Biology biology.organism_classification Cell biology 030104 developmental biology Basic-Leucine Zipper Transcription Factors Seeds Unfolded protein response Mannitol 010606 plant biology & botany medicine.drug |
| Zdroj: | Journal of cellular biochemistry. 119(8) |
| ISSN: | 1097-4644 |
| Popis: | Low temperatures, salinity, and drought cause significant crop losses. These conditions involve osmotic stress, triggering transcriptional remodeling, and consequently, the restitution of cellular homeostasis and growth recovery. Protein transcription factors regulate target genes, thereby mediating plant responses to stress. bZIP17 is a transcription factor involved in cellular responses to salinity and the unfolded protein response. Because salinity can also produce osmotic stress, the role of bZIP17 in response to osmotic stress was assessed. Mannitol treatments induced the transcript accumulation and protein processing of bZIP17. Transcriptomic analyses showed that several genes associated with seed storage and germination showed lower expression in bzip17 mutants than in wild-type plants. Interestingly, bZIP17 transcript was more abundant in seeds, and germination analyses revealed that wild-type plants germinated later than bzip17 mutants in the presence of mannitol, but no effects were observed when the seeds were exposed to ABA. Finally, the transcript levels of bZIP17 target genes that control seed storage and germination were assessed in seeds exposed to mannitol treatments, which showed lower expression levels in bzip17 mutants compared to the wild-type seeds. These results suggest that bZIP17 plays a role in osmotic stress, acting as a negative regulator of germination through the regulation of genes involved in seed storage and germination. |
| Databáze: | OpenAIRE |
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