Plant Physiol. Tips for Better Browsing
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Physiology Preview
Published on January 26, 2007; 10.1104/pp.106.093005

This Article
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrow All Versions of this Article:
143/3/1306    most recent
pp.106.093005v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Yamaji, N.
Right arrow Articles by Ma, J. F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Yamaji, N.
Right arrow Articles by Ma, J. F.
Agricola
Right arrow Articles by Yamaji, N.
Right arrow Articles by Ma, J. F.

Received November 14, 2006
Accepted January 8, 2007

Spatial Distribution and Temporal Variation of the Rice Si Transporter Lsi1

Naoki Yamaji and Jian Feng Ma *

Research Institute for Bioresources, Okayama University, Chuo 2-20-1, Kurashiki 710-0046, Japan

* Corresponding author; email: maj{at}rib.okayama-u.ac.jp.

Rice is a typical Si accumulator and requires a large amount of Si for high yield production. Recently, a gene (Lsi1) encoding a Si transporter was identified in rice roots. Here, we characterized Lsi1 in terms of spatial distribution and temporal variation using both physiological and molecular approaches. Results from a multi-compartment transport-box experiment showed that the major site for Si uptake was located at the basal zone (>10 mm from the root tip) of the roots rather than at the root tips (<10 mm from the root tip). Consistent with the Si uptake pattern, Lsi1 expression and distribution of the Lsi1 protein were found only in the basal zone of roots. In the basal zones of the seminal, crown and lateral roots, the Lsi1 protein showed a polar localization at the distal side of both the exodermis and endodermis, where the Casparian bands are formed. This indicates that Lsi1 is required for the transport of Si through the cells of exodermis and endodermis. The expression of Lsi1 displayed a distinct diurnal pattern. Furthermore, the expression was transiently enhanced around the heading stage, which coincides with a high Si requirement during this growth stage. The expression was down-regulated by dehydration stress and ABA, suggesting that the expression of Lsi1 may be regulated by ABA.




This article has been cited by other articles:


Home page
 Plant CellHome page
N. Yamaji, N. Mitatni, and J. F. Ma
A Transporter Regulating Silicon Distribution in Rice Shoots
PLANT CELL, May 1, 2008; 20(5): 1381 - 1389.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
J. F. Ma, N. Yamaji, K. Tamai, and N. Mitani
Genotypic Difference in Silicon Uptake and Expression of Silicon Transporter Genes in Rice
Plant Physiology, November 1, 2007; 145(3): 919 - 924.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 2007 by the American Society of Plant Biologists