| Project/Area Number |
26660050
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | Saga University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
ARIMA SUSUMU 佐賀大学, 農学部, 教授 (90140954)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 光質 / 共生 / ミヤコグサ / トマト / 菌根菌 / ジャスモン酸 / ストリゴラクトン / R/FR / 感染 / 作物生産 / ダイズ |
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| Outline of Final Research Achievements |
We show that sensing the R/FR ratio positively influences arbuscular mycorrhizal (AM) symbiosis development through jasmonic acid (JA) and strigolactone (SL) signaling. By transferring white light-grown Lotus japonicus inoculated with Rhizophagus irregularis to conditions of differing R/FR ratio, we found that in high R/FR, the infection rate of AM fungi significantly increased compared to plants grown in low R/FR. A similar response occurred in the non-legume Solanum lycopersicum cv. Micro-Tom. Moreover, adding JA not only enhanced transcription of the marker genes in both legume and non-legume roots, but also increased fungal hyphal length. We found that root exudates from high R/FR treated plants contained more (+)-5-deoxystrigol than low R/FR-derived exudates.
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