Linked Life Data

10837267

Source:http://linkedlifedata.com/resource/pubmed/id/10837267

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2000-6-30
pubmed:abstractText
Plants are able to take up ammonium from the soil, or through symbiotic interactions with microorganisms, via the root system. Using functional complementation of yeast mutants, it has been possible to identify a new class of membrane proteins, the ammonium transporter/methylammonium permease (AMT/MEP) family, that mediate secondary active ammonium uptake in eukaryotic and prokaryotic organisms. In plants, the AMT gene family can be subdivided according to their amino-acid sequences into three subfamilies: a large subfamily of AMT1 genes and two additional subfamilies each with single members (LeAMT1;3 from tomato and AtAMT2;1 from Arabidopsis thaliana). These transporters vary especially in their kinetic properties and regulatory mechanism. High-affinity transporters are induced in nitrogen-starved roots, whereas other transporters may be considered as the 'work horses' that are active when conditions are conducive to ammonium assimilation. The expression of several AMTs in root hairs further supports a role in nutrient acquisition. These studies provide basic information that will be needed for the dissection of nitrogen uptake by plants at the molecular level and for determining the role of individual AMTs in nutrient uptake and potentially in nutrient efficiency.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1369-5266
pubmed:author
pubmed:issnType
Print
pubmed:volume
3
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
254-61
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
The molecular physiology of ammonium uptake and retrieval.
pubmed:affiliation
Zentrum für Molekularbiologie der Pflanzen, Universität Tübingen, Tübingen, D-72076, Germany. vonwiren@uni-tuebingen.de
pubmed:publicationType
Journal Article, Review, Research Support, Non-U.S. Gov't