Seed dormancy is a developmental checkpoint that prevents mature seeds from germinating under conditions that are otherwise favorable for germination.Temperature and light are themost relevant environmental factors th...Seed dormancy is a developmental checkpoint that prevents mature seeds from germinating under conditions that are otherwise favorable for germination.Temperature and light are themost 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 asmRNAsplicing,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 howdifferent post-transcriptional processes in crop seeds can contribute to the design of genotypes with better performance and higher productivity.展开更多
基金supported by the UBACyT 20020170100265BAthe Agencia Nacional de Promociòn Científica y Tecnològica of Argentina(PICT2016-1784 and PICT2017-0583)to J.F.B.
文摘Seed dormancy is a developmental checkpoint that prevents mature seeds from germinating under conditions that are otherwise favorable for germination.Temperature and light are themost 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 asmRNAsplicing,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 howdifferent post-transcriptional processes in crop seeds can contribute to the design of genotypes with better performance and higher productivity.
