| Budget Amount *help |
¥41,080,000 (Direct Cost: ¥31,600,000、Indirect Cost: ¥9,480,000)
Fiscal Year 2019: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2018: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2017: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2016: ¥22,360,000 (Direct Cost: ¥17,200,000、Indirect Cost: ¥5,160,000)
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| Outline of Final Research Achievements |
AM fungi had long been postulated to produce signal molecules called “Myc factors” that induce the molecular and cellular responses leading to successful root colonization by AM fungi. Lipochitooligosaccharides called Myc-LCOs and small chitin oligomers have been identified as Myc factors from the germinated spore exudates of the AM fungus Rhizophagus irregularis (Maillet et al., 2011, Genre et al., 2012). However, it was found that Myc-LCOs and chitin oligomers elicit only partial and limited induction of symbiotic responses in AM host plants. We previously showed that partially N-deacetylated chitin (DAC) trimers were strong inducers of AM symbiosis-related gene expression in rice roots and were secreted from R. irregularis. There are six possible isomers for DAC trimers. In this study, we identified a DAC trimer isomer, secreted by the AM fungus, acting as an inducer of AM-symbiotic responses in rice.
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