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rdf:type |
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lifeskim:mentions |
umls-concept:C0018270,
umls-concept:C0018494,
umls-concept:C0032821,
umls-concept:C0162741,
umls-concept:C0242726,
umls-concept:C0596902,
umls-concept:C1428237,
umls-concept:C1514873,
umls-concept:C1546857,
umls-concept:C1556066,
umls-concept:C1619636,
umls-concept:C1710425,
umls-concept:C2700640
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pubmed:issue |
1
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pubmed:dateCreated |
2001-2-22
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pubmed:abstractText |
Root hair initiation involves the formation of a bulge at the basal end of the trichoblast by localized diffuse growth. Tip growth occurs subsequently at this initiation site and is accompanied by the establishment of a polarized cytoplasmic organization. Arabidopsis plants homozygous for a complete loss-of-function tiny root hair 1 (trh1) mutation were generated by means of the T-DNA-tagging method. Trichoblasts of trh1 plants form initiation sites but fail to undergo tip growth. A predicted primary structure of TRH1 indicates that it belongs to the AtKT/AtKUP/HAK K(+) transporter family. The proposed function of TRH1 as a K(+) transporter was confirmed in (86)Rb uptake experiments, which demonstrated that trh1 plants are partially impaired in K(+) transport. In line with these results, TRH1 was able to complement the trk1 potassium transporter mutant of Saccharomyces, which is defective in high-affinity K(+) uptake. Surprisingly, the trh1 phenotype was not restored when mutant seedlings were grown at high external potassium concentrations. These data demonstrate that TRH1 mediates K(+) transport in Arabidopsis roots and is responsible for specific K(+) translocation, which is essential for root hair elongation.
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pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/11158535-10518597,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11158535-10589676,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11158535-1463855,
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http://linkedlifedata.com/resource/pubmed/commentcorrection/11158535-9477572,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11158535-9572739,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11158535-9655814,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11158535-9684353,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11158535-9741629
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Jan
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pubmed:issn |
1040-4651
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
13
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
139-51
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pubmed:dateRevised |
2010-9-14
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pubmed:meshHeading |
pubmed-meshheading:11158535-Amino Acid Sequence,
pubmed-meshheading:11158535-Arabidopsis,
pubmed-meshheading:11158535-Carrier Proteins,
pubmed-meshheading:11158535-Genes, Plant,
pubmed-meshheading:11158535-Genetic Complementation Test,
pubmed-meshheading:11158535-Ion Transport,
pubmed-meshheading:11158535-Molecular Sequence Data,
pubmed-meshheading:11158535-Phenotype,
pubmed-meshheading:11158535-Plant Roots,
pubmed-meshheading:11158535-Potassium,
pubmed-meshheading:11158535-Protein Conformation,
pubmed-meshheading:11158535-Sequence Homology, Amino Acid
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pubmed:year |
2001
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pubmed:articleTitle |
TRH1 encodes a potassium transporter required for tip growth in Arabidopsis root hairs.
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pubmed:affiliation |
Laboratory of Molecular Biology, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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