Journal article
Mycorrhizal phosphate uptake pathway in tomato is phosphorus-repressible and transcriptionally regulated
Swiss Federal Institute of Technology Zurich1
Ecosystems, Biosystems Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Biosystems Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
Risø National Laboratory for Sustainable Energy, Technical University of Denmark4
Plants colonized by arbuscular mycorrhizal (AM) fungi take up phosphate (Pi)via the mycorrhizal and the direct Pi uptake pathway. Our understanding of the molecular mechanisms involved in the regulation of these pathways is just emerging.Here, we have analyzed the molecular physiology of mycorrhizal Pi uptake in the tomato (Solanum lycopersicum) variety Micro-Tom and integrated the data obtained with studies on chemical signaling in mycorrhiza-inducible Pi transporter gene regulation.At high plant phosphorus (P) status, the mycorrhizal Pi uptake pathway was almost completely repressed and the mycorrhiza-inducible Pi transporter genes were down-regulated.
A high plant P status also suppressed the activation of the mycorrhiza-specific StPT3 promoter fragment by phospholipid extracts containing the mycorrhiza signal lysophosphatidylcholine.Our results suggest that the mycorrhizal Pi uptake pathway is controlled at least partially by the plant host. This control involves components in common
Language: | English |
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Publisher: | Blackwell Publishing Ltd |
Year: | 2009 |
Pages: | 950-959 |
ISSN: | 14698137 and 0028646x |
Types: | Journal article |
DOI: | 10.1111/j.1469-8137.2008.02721.x |
Biological Transport Lysophosphatidylcholines Mycorrhizae Phosphate Transport Proteins Phosphates Phosphorus Plant Proteins Signal Transduction Solanum lycopersicum gene regulation lysophosphatidylcholine mycorrhiza phosphate starvation response phosphate transporter phosphate uptake pathways tomato (Solanum lycopersicum) Micro-Tom tomato (Solanum lycopersicum) Micro‐Tom