Overlaps in the Transcriptional Profiles of Medicago truncatula Roots Inoculated with Two Different Glomus Fungi Provide Insights into the Genetic Program Activated during Arbuscular Mycorrhiza

摘要: Arbuscular mycorrhiza (AM) is a widespread symbiotic association between plants and fungal microsymbionts that supports plant development under nutrient-limiting various stress conditions. In this study, we focused on the overlapping genetic program activated by two commonly studied in addition to identifying AM-related genes. We thus applied 16,086 probe microarrays profile transcriptome of model legume Medicago truncatula during interactions with Glomus mosseae intraradices specified total 201 genes as significantly coinduced at least 2-fold, more than 160 being reported AM induced for first time. Several hundred were additionally up-regulated sole interaction, indicating some extent depends colonizing microsymbiont. Genes both nitrate, ion, sugar transporters, enzymes involved secondary metabolism, proteases, Kunitz-type protease inhibitors. Furthermore, encoded receptor kinases other components signal transduction pathways well AM-induced transcriptional regulators, reflecting changes signaling. By use reporter gene expression, demonstrated one member family encoding blue copper binding proteins (MtBcp1) was specifically strongly arbuscule-containing regions mycorrhizal roots. A comparison expression profiles those nitrogen-fixing root nodules suggested only limited overlap programs orchestrating endosymbioses.