Linked Life Data

17625566

Source:http://linkedlifedata.com/resource/pubmed/id/17625566

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7150
pubmed:dateCreated
2007-7-12
pubmed:databankReference
pubmed:abstractText
Silicon is an important nutrient for the optimal growth and sustainable production of rice. Rice accumulates up to 10% silicon in the shoot, and this high accumulation is required to protect the plant from multiple abiotic and biotic stresses. A gene, Lsi1, that encodes a silicon influx transporter has been identified in rice. Here we describe a previously uncharacterized gene, low silicon rice 2 (Lsi2), which has no similarity to Lsi1. This gene is constitutively expressed in the roots. The protein encoded by this gene is localized, like Lsi1, on the plasma membrane of cells in both the exodermis and the endodermis, but in contrast to Lsi1, which is localized on the distal side, Lsi2 is localized on the proximal side of the same cells. Expression of Lsi2 in Xenopus oocytes did not result in influx transport activity for silicon, but preloading of the oocytes with silicon resulted in a release of silicon, indicating that Lsi2 is a silicon efflux transporter. The identification of this silicon transporter revealed a unique mechanism of nutrient transport in plants: having an influx transporter on one side and an efflux transporter on the other side of the cell to permit the effective transcellular transport of the nutrients.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1476-4687
pubmed:author
pubmed:issnType
Electronic
pubmed:day
12
pubmed:volume
448
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
209-12
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
An efflux transporter of silicon in rice.
pubmed:affiliation
Research Institute for Bioresources, Okayama University, Chuo 2-20-1, Kurashiki 710-0046, Japan. maj@rib.okayama-u.ac.jp
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't