Mycorrhizal phosphate uptake pathway in tomato is phosphorus‐repressible and transcriptionally regulated

• DOI: 10.1111/j.1469-8137.2008.02721.x
• Publication Date: 2008-12-24T06:32:59Z
• Authors: Réka Nagy; David Drissner; Nikolaus Amrhein; Iver Jakobsen; Marcel Bucher
• Keywords: Arbuscular mycorrhiza

• Plants colonized by arbuscular mycorrhizal (AM) fungi take up phosphate (Pi) via the and direct Pi uptake pathway. Our understanding of molecular mechanisms involved in regulation these pathways is just emerging. Here, we have analyzed physiology tomato (Solanum lycopersicum) variety Micro-Tom integrated data obtained with studies on chemical signaling mycorrhiza-inducible transporter gene regulation. At high plant phosphorus (P) status, pathway was almost completely repressed genes were down-regulated. A P status also suppressed activation mycorrhiza-specific StPT3 promoter fragment phospholipid extracts containing mycorrhiza signal lysophosphatidylcholine. results suggest that controlled at least partially host. This control involves components common regulatory mechanism starvation response plants.