| Budget Amount *help |
¥44,850,000 (Direct Cost: ¥34,500,000、Indirect Cost: ¥10,350,000)
Fiscal Year 2014: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
Fiscal Year 2013: ¥12,740,000 (Direct Cost: ¥9,800,000、Indirect Cost: ¥2,940,000)
Fiscal Year 2012: ¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
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| Outline of Final Research Achievements |
We identified novel genes involved in accumulation of cadmium (Cd) and arsenic (As) in rice. We found that OsNramp5 is a major transporter for Cd uptake in rice. OsNramp5 is polarly localized at the distal side of root exodermis and endodermis. Over-expression of OsHMA3, a tonoplast-localized Cd transporter, resulted in enhanced tolerance to Cd toxicity. Furthermore, we found that OsHMA2 localized at the node is involved in distribution of Cd to the grain. On the other hand, we found that OsABCC1 reduces As accumulation to the grain in rice. OsABCC1 is mainly localized to the tonoplast of phloem companion cells of the node.
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