| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Research Abstract |
In higher plants, it has been hypothesised that there are unknown signals (“plastid signals”) derived from plastids to control nuclear gene expression. Analysis of gun mutants that have defects in this signal transduction pathway suggests the involvement of the tetrapyrrole intermediates (e.g. Mg-Protoporphyrin IX, MgProto) as signaling factors. Although the involvement of tetrapyrrole biosynthesis has been strongly suggested, the entity of the signal is still obscure. For better understanding of plastid signaling, we have been screening the gain-of-function type gun mutants using FOX-hunting (Riken Arabidopsis Full Length cDNA overexpressor) lines. We identified genes that encode a member of bHLH gene family and a kelch-repeat containing factor.
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