| Budget Amount *help |
¥24,570,000 (Direct Cost: ¥18,900,000、Indirect Cost: ¥5,670,000)
Fiscal Year 2017: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2015: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2014: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
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| Outline of Final Research Achievements |
Chloroplasts are the organelles that perform photosynthesis and play crucial roles in plant growth. However, regulatory mechanisms of chloroplast development remain largely elusive. My research group previously reported that removal of shoots from Arabidopsis seedlings induces chloroplast development and photosynthetic activation in roots. In this project, I attempted to reveal signaling pathways involved in the shoot removal-induced root greening response. The results demonstrate that shoot removal induces upregulation of a transcription factor GNL via activation of a cytokinin signaling pathway, thereby increases expression of nuclear- and plastid-encoded photosynthesis-associated genes and photosynthetic efficiency. This project further revealed that biosynthesis of major thylakoid membrane lipids before and at the onset of chloroplast biogenesis is essential for biosynthesis of chlorophylls and thylakoid-associated photosynthesis proteins.
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