Evolutionarily conserved links between regulating phosphate starvation and arbuscular mycorrhizal symbiosis in plants (EvoSymPho)

调节植物磷酸盐饥饿和丛枝菌根共生之间的进化保守联系（EvoSymPho）

• 批准号: 528027896
• 负责人: Professor Dr. Burkhard Becker
• 金额: --
• 依托单位: Institut für Pflanzenwissenschaften
• 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/528027896?language=en
• 关键词: Evolutionarily; conserved; links; between; regulating

Phosphorus (P) like nitrogen (N), is a critical nutrient required for all life. It generally occurs in small quantities in the natural environment. Therefore, P is usually considered the "limiting" nutrient in aquatic and terrestrial ecosystems, meaning that the availability of this nutrient controls the growth and productivity of aquatic and terrestrial plants, including algae. In most land plants, symbiosis with mycorrhizal fungi, and nitrogen-fixing rhizobia mainly in legumes, greatly facilitates soil P and N uptake. The development of arbuscular mycorrhiza (AM) as well as other plant symbioses depends on the common symbiosis signaling pathway (CSSP) in host plants which recognizes the microbial partner and stimulates the expression of genes required for the symbiosis. Furthermore, AM and nodulation symbioses are controlled by the P and N status of the host via interlinked response pathways. Key components of the CSSP and the phosphate starvation response (PSR) pathway are conserved between algae and land plants. However, the function of algal orthologues of PSR and CSSP components is currently unknown. Recent work has shown that the AM symbiosis is modulated downstream of the CSSP by a network of receptor kinases including surface localized, transmembrane receptor-like kinases (RLKs) and receptor-like cytoplasmic kinases (RLCKs). Our project aims to elucidate the interactions between RLK/RLCK proteins and upstream and downstream regulatory steps that are important for understanding the evolution and the molecular mechanisms of RLCKs in AM symbiosis signaling in the context of the CSSP in land plants. We plan to compare the liverwort Marchantia paleacea, which forms AM symbiosis, with the evolutionarily distant aquatic and terrestrial alga Zygnema, which belongs to the extant sister group of land plants. We expect to gain significant insight into the evolution of AM symbiosis regulation and the integration of phosphate sensing and signaling. Our project will complement other proposals within MAdLand on integrating sensing of environmental cues, downstream cellular signaling and transcriptional responses underlying complex adaptive traits for life on land.

磷(P)和氮(N)一样，是所有生命所必需的重要营养物质。它通常在自然环境中少量出现。因此，磷通常被认为是水生和陆地生态系统中的“限制性”营养物质，这意味着这种营养物质的可用性控制着水生和陆地植物的生长和生产力，包括藻类。在大多数陆地植物中，与菌根真菌共生，以及主要在豆科植物中的固氮根瘤菌，极大地促进了土壤对P和N的吸收。丛枝菌根(AM)和其他植物共生生物的发育依赖于寄主植物中共同的共生信号通路(CSSP)，CSSP识别微生物伙伴并刺激共生所需基因的表达。此外，AM和结瘤共生是由寄主的P和N状态通过连锁的反应途径控制的。CSSP和磷酸盐饥饿反应(PSR)途径的关键成分在藻类和陆地植物之间是保守的。然而，PSR和CSSP组分的藻类同源物的功能目前尚不清楚。最近的工作表明，AM共生受CSSP下游一系列受体激酶的调控，这些受体蛋白包括表面定位的跨膜受体样激酶(RLKs)和受体样细胞质Ks(RLCKs)。我们的项目旨在阐明RLK/RLCK蛋白与上下游调控步骤之间的相互作用，这对于理解陆地植物在CSSP背景下AM共生信号中RLKs的进化和分子机制是重要的。我们计划将形成AM共生的古地钱草与进化上遥远的水生和陆生藻类Zygnema进行比较，Zygnema属于陆地植物现存的姊妹类。我们期望对AM共生调控的进化以及磷酸盐传感和信号的整合有重要的洞察力。我们的项目将补充Madland内部关于整合环境线索、下游细胞信号和转录反应的感知的其他建议，这些信号和转录反应是陆地生命复杂适应特征的基础。