State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China.
Plant Signal Behav. 2011 Sep;6(9):1300-4. doi: 10.4161/psb.6.9.16365.
Most terrestrial plant roots form mutualistic symbiosis with soil-borne arbuscular mycorrhizal fungi (AMF), a characteristic feature of which is nutrient exchange between the two symbiotic partners. Phosphate (Pi) is the main benefit the host plants acquired from the AMF. It has long been a common realization that high Pi supply could suppress the AMF development. However, the direct molecular regulatory mechanisms underlying this plant directed suppression are lacking. Here, we reviewed the recent work providing the evidences that high Pi supply induces transcriptional alteration, leading to the inhibition of AMF development at different stages of AM symbiosis, and gave our view on potential cross-talk among Pi starvation, AM as well as phytohormone signaling.
大多数陆生植物根系与土壤来源的丛枝菌根真菌（AMF）形成互利共生关系，其特征是两个共生伙伴之间的养分交换。磷酸盐（Pi）是宿主植物从 AMF 获得的主要益处。长期以来，人们普遍认识到高 Pi 供应会抑制 AMF 的发育。然而，这种由植物直接调控的抑制作用的分子机制尚不清楚。在这里，我们回顾了最近的工作，这些工作提供了证据表明，高 Pi 供应会诱导转录改变，从而抑制 AM 共生不同阶段的 AMF 发育，并就 Pi 饥饿、AM 以及植物激素信号之间的潜在串扰提出了我们的看法。
