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JST Press Release

Nov. 20, 2013
Japan Science and Technology Agency (JST)
5-3, Yonbancho, Chiyoda-ku, Tokyo 102-8666
URL http://www.jst.go.jp/EN/index.html

Iron-efficient rice with improved growth under low iron availability and high iron accumulation

Iron is an essential element for all animals and plants. However, iron availability for plants is limited because of extremely low solubility in soil. Consequently, plants often suffer from iron deficiency, leading to growth defect. Kobayashi et al. searched for iron-binding proteins and identified novel rice proteins OsHRZ1 and OsHRZ2. Transgenic rice with reduced amounts of these proteins showed better growth under iron-limiting conditions and accumulated about 2-4 times more iron in seeds and leaves compared to normal rice. This achievement paves the way for improvement in plant productivity in problem soils and creation of crops accumulating high iron in edible parts.

Researcher Information

Research Area : "Plant Sicences for CO2 Utilization"
Research Theme : "Reinforcement of bioproductivity by uncovering plant iron sensing mechanism"

Journal Information

Takanori Kobayashi, Seiji Nagasaka, Takeshi Senoura, Reiko Nakanishi Itai, Hiromi Nakanishi, Naoko K. Nishizawa.
“Iron-binding haemerythrin RING ubiquitin ligases regulate plant iron responses and accumulation“
Nature Communications, Published online 20 November 2013
doi: 10.1038/ncomms3792


[About Research]
Takanori Kobayashi, Ph.D.
PRESTO researcher, Japan Science and Technology Agency (JST)
Associate Professor, Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University

[About Program]
Masashi Furukawa
Green Innovation Group, Department of Innovation Research, JST


JST, an integrated organization of science and technology in Japan, establishes an infrastructure for the entire process from the creation of knowledge to the return to the society. For more information, visit http://www.jst.go.jp/EN/