The United Graduate School of Agricultural Science, Tottori University , Tottori, Japan.
Functional Genomics Facility, NIBB Core Research Facilities, National Institute for Basic Biology , Okazaki, Japan.
Plant Signal Behav. 2020 Sep 1;15(9):1784544. doi: 10.1080/15592324.2020.1784544. Epub 2020 Jun 27.
Arbuscular mycorrhiza (AM) is a symbiotic interaction in terrestrial plants that is colonized by fungi in the Glomeromycotina. The morphological types of AM, including the -type and -type, are distinct, depending on the host plant species. A part of the regulatory pathways in -type AM symbiosis has been revealed because most model plants form the -type AM with a model AM fungus, . Moreover, gibberellin (GA) is known to severely inhibit AM fungal colonization in -type AM symbiosis. Recently, we showed that exogenous GA treatment significantly promoted AM fungal colonization in -type AM symbiosis in . In this study, we focused on the transcriptional changes in AM symbiosis-related genes in GA-treated . The expression levels of all examined genes were maintained or increased by GA treatment compared with those of the control treatment. Our new results suggest that signaling pathway(s) required for establishing AM symbiosis in may be distinct from the well-characterized pathway for that in model plants.
丛枝菌根 (AM) 是陆地植物中的一种共生相互作用，由 Glomeromycotina 中的真菌定殖。AM 的形态类型，包括 - 型和 - 型，因宿主植物种类而异。由于大多数模式植物与模式 AM 真菌形成 - 型 AM，因此已经揭示了 - 型 AM 共生的一部分调控途径。此外，赤霉素 (GA) 已知会严重抑制 - 型 AM 共生中的 AM 真菌定殖。最近，我们表明，外源 GA 处理可显著促进 中的 - 型 AM 共生中的 AM 真菌定殖。在这项研究中，我们专注于 GA 处理的 AM 共生相关基因的转录变化。与对照处理相比，GA 处理维持或增加了所有检查基因的表达水平。我们的新结果表明，在 中建立 AM 共生所需的信号转导途径可能与在模式植物中特征明确的途径不同。
