Roles of bacterial stringent response, conserved in chloroplast, for plant physiology

严格响应是控制细菌中基因表达和蛋白质活性的全球调控系统。最近的基因组序列分析表明，编码参与反应的蛋白质的基因在植物中是保守的。然而，植物严格反应的生理功能还没有得到很好的了解。在本研究中，我们对拟南芥的严格反应因子进行了表征。这些结果表明，株型的严格反应对叶绿体的发育以及叶绿体基因组的转录和翻译具有重要作用。

Stringent response is a global regulatory system controlling gene expression and protein activities in bacteria. Recent genome sequence analyses have revealed that genes encoding proteins involved in the response are conserved in plants. However, physiological functions of the plant stringent response have not been well understood.In this study, we characterized Arabidopsis stringent factors. The results indicated that the plant-type stringent response has important roles for chloroplast development as well as transcription and translation of chloroplast genome.