Departamento de Biología Molecular, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay.
J Exp Bot. 2022 Jul 16;73(13):4546-4561. doi: 10.1093/jxb/erac055.
Transcription factors control gene expression, leading to regulation of biological processes that determine plant development and adaptation to the environment. Land colonization by plants occurred 450-470 million years ago and was accompanied by an increase in the complexity of transcriptional regulation associated to transcription factor gene expansions. AP2/ERF, bHLH, MYB, NAC, GRAS, and WRKY transcription factor families increased in land plants compared with algae. In angiosperms, they play crucial roles in regulating plant growth and responses to environmental stressors. However, less information is available in bryophytes and only in a few cases is the functional role of moss transcription factors in stress mechanisms known. In this review, we discuss current knowledge of the transcription factor families involved in development and defense responses to stress in mosses and other bryophytes. By exploring and analysing the Physcomitrium patens public database and published transcriptional profiles, we show that a high number of AP2/ERF, bHLH, MYB, NAC, GRAS, and WRKY genes are differentially expressed in response to abiotic stresses and during biotic interactions. Expression profiles together with a comprehensive analysis provide insights into relevant transcription factors involved in moss defenses, and hint at distinct and conserved biological roles between bryophytes and angiosperms.
转录因子控制基因表达，从而调节决定植物发育和适应环境的生物学过程。植物在 4.5 亿至 4.7 亿年前开始在陆地上殖民，伴随着与转录因子基因扩展相关的转录调控复杂性的增加。与藻类相比，AP2/ERF、bHLH、MYB、NAC、GRAS 和 WRKY 转录因子家族在陆地植物中增加。在被子植物中，它们在调节植物生长和对环境胁迫的反应中起着至关重要的作用。然而，在苔藓植物中，信息较少，并且只有在少数情况下才知道苔藓转录因子在胁迫机制中的功能作用。在这篇综述中，我们讨论了参与苔藓植物和其他苔藓植物发育和应激防御反应的转录因子家族的现有知识。通过探索和分析 Physcomitrium patens 公共数据库和已发表的转录谱，我们表明，大量的 AP2/ERF、bHLH、MYB、NAC、GRAS 和 WRKY 基因在应对非生物胁迫和生物相互作用时表现出差异表达。表达谱结合全面分析提供了对参与苔藓防御相关转录因子的深入了解，并暗示了苔藓植物和被子植物之间存在独特而保守的生物学作用。
