The amphibious liverwort Riccia fluitans:A novel model organism to analyze adaptive land plant features

两栖地钱 Riccia Fluitans：一种分析适应性陆地植物特征的新型模式生物

• 批准号: 440539914
• 负责人: Professorin Dr. Sabine Zachgo
• 金额: --
• 依托单位: Arbeitsgruppe Botanik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/440539914?language=en
• 关键词: amphibious; liverwort; Riccia; fluitans; novel

TCP transcription factors (TFs) are known to exert crucial regulatory functions in angiosperm development. Recently, we detected that the Marchantia polymorpha TF MpTCP1 exhibits a growth regulatory function and also governs the formation of novel plant pigments, which might mediate protective functions against abiotic stress. Plant terrestrialization likely started from a freshwater environment, where ancestors of land plants experienced water scarcity. The first land plants were thus facing novel abiotic stressors such as drought and high light intensities. To investigate adaptive molecular mechanisms enabling the conquest of land, the emerging model organism Riccia fluitans is ideally suited, as this amphibious liverwort can strive in aquatic as well as terrestrial habitats. Given its striking developmental plasticity, this liverwort can adapt thallus development to different habitats. Desiccation of the R. fluitans water form causes the formation of typical land plant structures: rhizoids as anchoring structures, air pores for gas exchange and a repellent surface. We will advance the tool box for R. fluitans and analyze the RfTCP1 activities by generating and investigating CRISPR/Cas9-induced mutants. The R. fluitans water and land forms also differ in their meristematic activities, thereby mediating thallus growth differences. The redox-sensitive MpTCP1 protein activity controls a complex downstream redox network, affecting also growth. We aim to investigate the impact of redox processes on meristematic activities and the formation of adaptive land plant features and in changing, challenging environments.

TCP转录因子在被子植物的发育过程中发挥着重要的调控作用。最近，我们发现地钱TF MpTCP 1具有生长调节功能，也支配新的植物色素的形成，这可能介导对非生物胁迫的保护功能。植物陆生化可能始于淡水环境，在那里陆生植物的祖先经历了缺水。因此，第一批陆地植物面临着新的非生物压力，如干旱和强光。为了研究适应性分子机制，使征服土地，新兴的模式生物里恰fluitans是理想的适合，因为这种两栖苔可以在水生和陆生栖息地的努力。由于其惊人的发育可塑性，这种苔可以适应不同的栖息地的叶状体发育。干燥的R。水的形式导致典型的陆地植物结构的形成：作为锚定结构的假根、用于气体交换的气孔和排斥表面。我们将推进R的工具箱。通过产生和研究CRISPR/Cas9诱导的突变体来分析RfTCP 1活性。中华民国flutans水和土地的形式也不同，在他们的分生组织活动，从而调解叶状体生长的差异。氧化还原敏感的MpTCP 1蛋白活性控制复杂的下游氧化还原网络，也影响生长。我们的目标是调查的分生组织活动和适应性陆地植物功能的形成，并在不断变化的，具有挑战性的环境中的氧化还原过程的影响。