| Budget Amount *help |
¥95,940,000 (Direct Cost: ¥73,800,000、Indirect Cost: ¥22,140,000)
Fiscal Year 2019: ¥25,480,000 (Direct Cost: ¥19,600,000、Indirect Cost: ¥5,880,000)
Fiscal Year 2018: ¥25,480,000 (Direct Cost: ¥19,600,000、Indirect Cost: ¥5,880,000)
Fiscal Year 2017: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Fiscal Year 2016: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Fiscal Year 2015: ¥12,480,000 (Direct Cost: ¥9,600,000、Indirect Cost: ¥2,880,000)
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| Outline of Final Research Achievements |
Nitrogen (N) is an essential macronutrient that plays a crucial role throughout plant development, but soil nitrate availability fluctuates temporally and spatially. We identified that N starvation-induced peptide CEP acts as a root-derived ascending N-demand signal. CEP is recognized in the shoot by CEP receptor, that leads to the production of non-secreted polypeptide, CEPD. CEPD acts as a descending signal to the root and ultimately upregulates nitrate transporter NRT2.1 gene in the roots. Thus, CEP induced on one side of the roots by local N starvation is able to mediate upregulation of NRT2.1 in the distant part of the roots. In addition to this, plants modulate the efficiency of root N acquisition in response to shoot N demand by CEPD-like 2, which is upregulated in the leaf vasculature in response to decreased shoot N status. Our findings provide new insights into the molecular basis of plant adaptation to a dynamically fluctuating N environment.
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