Bioscience, Biotechnology, and Biochemistry
Online ISSN : 1347-6947
Print ISSN : 0916-8451
Biochemistry & Molecular Biology
The Expression of a Barley HνNAS1 Nicotianamine Synthase Gene Promoter-gus Fusion Gene in Transgenic Tobacco is Induced by Fe-deficiency in Roots
Kyoko HIGUCHIMasaharu TANIHiromi NAKANISHIToshihiro YOSHIWARAFumiyuki GOTONaoko K. NISHIZAWASatoshi MORI
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2001 年 65 巻 7 号 p. 1692-1696

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Nicotianamine (NA) is a precursor for mugineic acid-family phytosiderophores, which are a critical component of the Fe aquisition process in graminaceous plants. In addition, nicotianamine synthase (NAS) is strongly induced in these plants by Fe deficiency. NA is essential for Fe metabolism also in dicots, but NAS is not induced by Fe deficiency. We introduced a barley HνNAS1 promoter-gus fusion gene into tobacco. GUS activity was induced in the roots of these plants by Fe deficiency, and was constitutively expressed at a low level in their leaves.
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© 2001 by Japan Society for Bioscience, Biotechnology, and Agrochemistry
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