| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Research Abstract |
Global systems of symbiotic nitrogen-fixing bradyrhizobia were conducted by comparative genomics of phylogenetic super-neighbors of the bacteria. Soil-dwelling Bradyrhizobium sp. strain S23321 lacked symbiosis island with high genomic co-linearity with B. japonicum USDA110, suggesting an ancestral-type genome of symbiotic bradyrhizobia. On the other hand, the genome analysis suggested soil-dwelling Agromonas oligotrophica (Bradyrhizobium oligotrophicum) is a nitrogen-fixing symbiont of Aechynomeny indica. Indeed, all texted strains of A. oligotrophica are able to nodulate A. indica with symbiotic nitrogen fixation. In addition, the rhcJ and ttsI mutants of B. japonicum for the type III protein secretion system (T3SS) gained the ability to nodulate Rj2 soybean, suggesting the effectors secreted via T3SS trigger incompatibility between these two partners.
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