Characteristics of light-regulated iron transport system in barley chloroplasts (Reprinted from Plant nutrition for sustainable food production and environment, 1997)

被引：0

作者：

Bughio, N ^{[1
]}

Takahashi, M ^{[1
]}

Yoshimura, E ^{[1
]}

Nishizawa, NK ^{[1
]}

Mori, S ^{[1
]}

机构：

[1] Univ Tokyo, Dept Appl Biol Chem, Lab Plant Mol Physiol, Bunkyo Ku, Tokyo 113, Japan

来源：

SOIL SCIENCE AND PLANT NUTRITION | 1997年 / 43卷

关键词：

Fe-59(3+)-epiHMA; Fe-transport; heavy metals; Hordeum vulgare; inhibitors; pH;

D O I：

暂无

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Fe absorption was examined using chloroplasts, isolated from leaves of hydroponically cultured Fe-sufficient barley plants, to clarify the mechanism underlying the light-dependent Fe-influx into the chloroplasts. Inhibitors of Fe transport, ATP and proton flux were employed. Fe transport into the chloroplasts was partially inhibited by bathophenanthrolinedisulfonic acid (BPDS), which suggested the involvement of Fe3+-reductase in the process of transmembrane Fe-influx. We also found that adenosine triphosphate (ATP:) and proton (H+) flux were not the cause of transmembrane Fe transport. The optimum pH for Fe transport across the chloroplast envelope was 8.0. However, a sharp increase in the Fe absorption was observed in pH range of 7.0 to 7.5. Fe transport into the chloroplasts was unaffected by the presence of Zn, Cu, Ni, Mn, Co or Cd in the medium at 1 x 10(-5) or 1 x 10(-4) M concentration.

引用

页码：959 / 963

页数：5

共 37 条

[1] Reevaluation of the genes induced by iron deficiency in barley roots (Reprinted from Plant nutrition for sustainable food production and environment, 1997)
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[2] Boron requirement for reproductive development in wheat (Reprinted from Plant nutrition for sustainable food production and environment, 1997)
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[5] Responses of secondary metabolism in plants to nutrient deficiency (Reprinted from Plant nutrition for sustainable food production and environment, 1997)
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