Post - transcriptional regulation of seed dormancy and germination : current understanding and future directions

• Autores: Tognacca, Rocío Soledad; Botto, Javier Francisco
• Año de publicación: 2021
• Idioma: inglés
• Tipo de recurso: artículo
• Fuente: Plant Communications; Vol.2, no.4; art.100169; https://www.cell.com
• Materia: ALTERNATIVE SPLICING; CHROMATIN REMODELING; DORMANCY; GERMINATION; MICRORNA (MIRNA); SEEDS
• Institución: Universidad de Buenos Aires. Facultad de Agronomía

Fil: Tognacca, Rocío Soledad. Universidad de Buenos Aires. Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE, CONICET-UBA). Buenos Aires, Argentina.
Fil: Tognacca, Rocío Soledad. CONICET - Universidad de Buenos Aires. Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE, CONICET-UBA). Buenos Aires, Argentina.
Fil: Tognacca, Rocío Soledad. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Fil: Tognacca, Rocío Soledad. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Fil: Botto, Javier Francisco. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Fil: Botto, Javier Francisco. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Seed dormancy is a developmental checkpoint that prevents mature seeds from germinating under conditions that are otherwise favorable for germination. Temperature and light are the most relevant environmental factors that regulate seed dormancy and germination. These environmental cues can trigger molecular and physiological responses including hormone signaling, particularly that of abscisic acid and gibberellin. The balance between the content and sensitivity of these hormones is the key to the regulation of seed dormancy. Temperature and light tightly regulate the transcription of thousands of genes, as well as other aspects of gene expression such as mRNA splicing, translation, and stability. Chromatin remodeling determines specific transcriptional outputs, and alternative splicing leads to different outcomes and produces transcripts that encode proteins with altered or lost functions. Proper regulation of chromatin remodeling and alternative splicing may be highly relevant to seed germination. Moreover, microRNAs are also critical for the control of gene expression in seeds. This review aims to discuss recent updates on post-transcriptional regulation during seed maturation, dormancy, germination, and post-germination events. We propose future prospects for understanding how different post-transcriptional processes in crop seeds can contribute to the design of genotypes with better performance and higher productivity.
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