The role of nicotianamine synthase in response to Fe nutrition status in Gramineae

被引：54

作者：

Higuchi, K ^{[1
]}

Kanazawa, K ^{[1
]}

Nishizawa, NK ^{[1
]}

Mori, S ^{[1
]}

机构：

[1] UNIV TOKYO,LAB PLANT MOL PHYSIOL,DEPT APPL BIOL CHEM,BUNKYO KU,TOKYO 113,JAPAN

来源：

PLANT AND SOIL | 1996年 / 178卷 / 02期

关键词：

Fe-deficiency; graminaceous plant; mugineic acids; phytosiderophore; nicotianamine synthase;

D O I：

10.1007/BF00011580

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Nicotianamine is an intermediate for the biosynthesis of mugineic acid-family phytosiderophores (MAs) in the Gramineae and a key substance for iron metabolism in dicots. Nicotianamine synthase catalyzes the formation of nicotianamine from S-adenosylmethionine. Nicotianamine synthase activity was induced in barley roots at the 3rd day after withholding Fe supply and declined within one day following the supply of Fe3+-epihydroxymugineic acid. The induction of nicotianamine synthase activity by Fe-deficiency was observed also in sorghum, maize, and rye, and the level of nicotianamine synthase activity was highly associated with the MAs secreted among graminaceous plant tested. Therefore, the nicotianamine synthase gene may be a suitable candidate for making a transgenic plant tolerant to Fe-deficiency.

引用

页码：171 / 177

页数：7

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