The down-regulation of Mt4-like genes by phosphate fertilization occurs systemically and involves phosphate translocation to the shoots
(1999) In Plant Physiology 119(1). p.241-248- Abstract
Mt4 is a cDNA representing a phosphate-starvation-inducible gene from Medicago truncatula that is down-regulated in roots in response to inorganic phosphate (Pi) fertilization and colonization by arbuscular mycorrhizal fungi. Split-root experiments revealed that the expression of the Mt4 gene in M. truncatula roots is down-regulated systemically by both Pi fertilization and colonization by arbuscular mycorrhizal fungi. A comparison of Pi levels in these tissues suggested that this systemic down-regulation is not caused by Pi accumulation. Using a 30-bp region of the Mt4 gene as a probe, Pi-starvation-inducible Mt4-like genes were detected in Arabidopsis and soybean (Glycine max L.), but not in corn (Zea mays L.). Analysis of the... (More)
Mt4 is a cDNA representing a phosphate-starvation-inducible gene from Medicago truncatula that is down-regulated in roots in response to inorganic phosphate (Pi) fertilization and colonization by arbuscular mycorrhizal fungi. Split-root experiments revealed that the expression of the Mt4 gene in M. truncatula roots is down-regulated systemically by both Pi fertilization and colonization by arbuscular mycorrhizal fungi. A comparison of Pi levels in these tissues suggested that this systemic down-regulation is not caused by Pi accumulation. Using a 30-bp region of the Mt4 gene as a probe, Pi-starvation-inducible Mt4-like genes were detected in Arabidopsis and soybean (Glycine max L.), but not in corn (Zea mays L.). Analysis of the expression of the Mt4-like Arabidopsis gene, At4, in wild-type Arabidopsis and pho1, a mutant unable to load Pi into the xylem, suggests that Pi must first be translocated to the shoot for down-regulation to occur. The data from the pho1 and split-root studies are consistent with the presence of a translocatable shoot factor responsible for mediating the systemic downregulation of Mt4-like genes in roots.
(Less)
- author
- Burleigh, Stephen H. LU and Harrison, Maria J.
- publishing date
- 1999-01-01
- type
- Contribution to journal
- publication status
- published
- in
- Plant Physiology
- volume
- 119
- issue
- 1
- pages
- 8 pages
- publisher
- American Society of Plant Biologists
- external identifiers
-
- pmid:9880366
- scopus:0032842049
- ISSN
- 0032-0889
- DOI
- 10.1104/pp.119.1.241
- language
- English
- LU publication?
- no
- id
- 38a507c3-22e0-443a-bb20-2ce75a9dbad8
- date added to LUP
- 2019-03-08 16:01:23
- date last changed
- 2024-06-11 06:07:55
@article{38a507c3-22e0-443a-bb20-2ce75a9dbad8,
abstract = {{<p>Mt4 is a cDNA representing a phosphate-starvation-inducible gene from Medicago truncatula that is down-regulated in roots in response to inorganic phosphate (Pi) fertilization and colonization by arbuscular mycorrhizal fungi. Split-root experiments revealed that the expression of the Mt4 gene in M. truncatula roots is down-regulated systemically by both Pi fertilization and colonization by arbuscular mycorrhizal fungi. A comparison of Pi levels in these tissues suggested that this systemic down-regulation is not caused by Pi accumulation. Using a 30-bp region of the Mt4 gene as a probe, Pi-starvation-inducible Mt4-like genes were detected in Arabidopsis and soybean (Glycine max L.), but not in corn (Zea mays L.). Analysis of the expression of the Mt4-like Arabidopsis gene, At4, in wild-type Arabidopsis and pho1, a mutant unable to load Pi into the xylem, suggests that Pi must first be translocated to the shoot for down-regulation to occur. The data from the pho1 and split-root studies are consistent with the presence of a translocatable shoot factor responsible for mediating the systemic downregulation of Mt4-like genes in roots.</p>}},
author = {{Burleigh, Stephen H. and Harrison, Maria J.}},
issn = {{0032-0889}},
language = {{eng}},
month = {{01}},
number = {{1}},
pages = {{241--248}},
publisher = {{American Society of Plant Biologists}},
series = {{Plant Physiology}},
title = {{The down-regulation of Mt4-like genes by phosphate fertilization occurs systemically and involves phosphate translocation to the shoots}},
url = {{http://dx.doi.org/10.1104/pp.119.1.241}},
doi = {{10.1104/pp.119.1.241}},
volume = {{119}},
year = {{1999}},
}