Journal
PLANT MOLECULAR BIOLOGY REPORTER
Volume 30, Issue 6, Pages 1480-1487Publisher
SPRINGER
DOI: 10.1007/s11105-012-0467-x
Keywords
Arbuscular mycorrhiza; Lysophosphatidylcholine; Petunia; Phosphate transporter; Phosphorus
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Funding
- National Transgenic Crop Research Project of China [2008ZX0811-005, 2009ZX08004-003B]
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An important characteristic of arbuscular mycorrhizal (AM) symbiosis is the transfer of phosphate from AM fungi to plants. This transfer is facilitated by mycorrhiza-inducible phosphate transporter proteins. Lysophosphatidylcholine (LPC) stimulates mycorrhiza-inducible phosphate transporter gene expression. This study aims to detect the pattern of five Petunia hybrida phosphate transporter (PhPT1-5) genes associated with AM development and their response to LPC in petunia roots. Using the method of real-time reverse transcription-polymerase chain reaction (RT-PCR), we explored the transcriptional changes of PhPT1-5 genes. Our results reveal that the PhPT4 transcript level is enhanced by 8,320-fold at 40 days after inoculation in mycorrhizal roots compared with uninoculated roots. However, PhPT4 is depressed by LPC, which acts as a mycorrhiza signal in several mycorrhizal plants. Our results suggest that PhPT4 is a mycorrhiza-specific phosphate transporter and LPC is not always a universal signal in AM fungi-plant symbiosis.
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