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A specific transporter for iron(III)-phytosiderophore in barley roots
Yoshiko Murata1, Jian Feng Ma, Naoki Yamaji
1Suntory Institute for Bioorganic Research, 1-1-1 Wakayamadai, Shimamoto-cho, Mishima-gun, Osaka 618-8503, Japan. murata@sunbor.or.jp
The Plant Journal : for Cell and Molecular Biology
|April 28, 2006
Summary
Barley possesses a specific transporter, HvYS1, crucial for acquiring iron from soil. This iron-phytosiderophore transporter is highly expressed in roots under iron deficiency, facilitating plant growth.
Area of Science:
- Plant Biology
- Molecular Biology
- Biochemistry
Background:
- Graminaceous plants acquire iron via mugineic acid (MA) and specific transporters.
- Barley exhibits high tolerance to iron deficiency.
Purpose of the Study:
- To identify and characterize the iron transporter gene (HvYS1) in barley.
- To understand the role of HvYS1 in iron acquisition.
Main Methods:
- Gene identification and sequence analysis.
- Real-time RT-PCR and in situ hybridization for gene expression and localization.
- Functional complementation in yeast and Xenopus oocytes.
Main Results:
- HvYS1 gene identified in barley, showing high identity to maize ZmYS1.
- HvYS1 expression is root-specific and upregulated under iron deficiency.
- HvYS1 specifically transports iron(III)-mugineic acid complexes.
Conclusions:
- HvYS1 is a key transporter for primary iron acquisition in barley.
- HvYS1 exhibits distinct localization and substrate specificity compared to ZmYS1.
- HvYS1 plays a vital role in barley's tolerance to iron deficiency.
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