Expression Profile of the Genes for Rice Cation/H super(+) Exchanger Family and Functional Analysis in Yeast

We identified five cation/H super(+) exchangers (CAX) from rice, and phylogenetically divided them into two clusters. Gene expression and absolute amounts of mRNA in different organs were analyzed by real-time PCR. OsCAX1a showed high expression in almost all organs. OsCAX1b and OsCAX1c were detecte...

Full description

Saved in:
Bibliographic Details
Published inPlant and cell physiology Vol. 46; no. 10; pp. 1735 - 1740
Main Authors Kamiya, Takehiro, Akahori, Taro, Maeshima, Masayoshi
Format Journal Article
LanguageEnglish
Published 01.10.2005
Subjects
Oryza sativa
Online AccessGet full text

Cover

More Information
Summary:We identified five cation/H super(+) exchangers (CAX) from rice, and phylogenetically divided them into two clusters. Gene expression and absolute amounts of mRNA in different organs were analyzed by real-time PCR. OsCAX1a showed high expression in almost all organs. OsCAX1b and OsCAX1c were detected in a limited number of organs and their expression levels were very low. The mRNA levels of OsCAX2 and OsCAX3 varied with the organ. OsCAXs were heterologously expressed in yeast to characterize the ion transport activity. All exchangers, except for OsCAX2, conferred tolerance to calcium. OsCAX1a and OsCAX3 conferred tolerance to manganese. The diversity of expression sites and substrates suggest the broad range function of CAX.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
content type line 23
ObjectType-Feature-2
ISSN:0032-0781