Skip Navigation


Molecular Plant Advance Access originally published online on June 27, 2008
Molecular Plant 2008 1(4):675-685; doi:10.1093/mp/ssn031
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
1/4/675    most recent
ssn031v1
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 Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Li, L.-G.
Right arrow Articles by Luan, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2008. Published by the Molecular Plant Shanghai Editorial Office in association with Oxford University Press on behalf of CSPP and IPPE, SIBS, CAS.

A Mitochondrial Magnesium Transporter Functions in Arabidopsis Pollen Development

Le-Gong Lia,b,1,2, Lubomir N. Sokolovb,c,2, Yong-Hua Yangb,c,2, Dong-Ping Lid, Julie Tingb, Girdhar K. Pandyb and Sheng Luanb,d,1

a College of Life Sciences, Capital Normal University, Beijing 100037, China
b Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA
c NJU–NJFU Joint Institute for Plant Molecular Biology, College of life Sciences, Nanjing University, Nanjing 210093, China
d College of Life Sciences, Hunan Normal University, Changsha 410006, China

1 To whom correspondence should be addressed. E-mail sluan{at}nature.berkeley.edu lgli11242006{at}gmail.com, fax (510) 642-4995 or 86–10–68981191, tel. (510) 642-6306 or 86–10–68902593.

Magnesium is an abundant divalent cation in plant cells and plays a critical role in many physiological processes. We have previously described the identification of a 10-member Arabidopsis gene family encoding putative magnesium transport (MGT) proteins. Here, we report that a member of the MGT family, AtMGT5, functions as a dual-functional Mg-transporter that operates in a concentration-dependent manner, namely it serves as a Mg-importer at micromolar levels and facilitates the efflux in the millimolar range. The AtMGT5 protein is localized in the mitochondria, suggesting that AtMGT5 mediates Mg-trafficking between the cytosol and mitochondria. The AtMGT5 gene was exclusively expressed in anthers at early stages of flower development. Examination of two independent T-DNA insertional mutants of AtMGT5 gene demonstrated that AtMGT5 played an essential role for pollen development and male fertility. This study suggests a critical role for Mg2+ transport between cytosol and mitochondria in male gametogenesis in plants.

Key Words: Mg2+-transporter • pollen • mitochondria • Arabidopsis

2 These authors contributed equally to this work.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Plant CellHome page
M. Gebert, K. Meschenmoser, S. Svidova, J. Weghuber, R. Schweyen, K. Eifler, H. Lenz, K. Weyand, and V. Knoop
A Root-Expressed Magnesium Transporter of the MRS2/MGT Gene Family in Arabidopsis thaliana Allows for Growth in Low-Mg2+ Environments
PLANT CELL, December 1, 2009; 21(12): 4018 - 4030.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.