| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
We discovered for the first time in 2010 that a bacterium P23 coexisted on the floating aquatic plants so-called a duckweed, promotes the plant growth by two-folds. In this research project, we clarified that a plant growth-promoting factor produced by P23 is a novel extracellular polysaccharide compound. Furthermore, we discovered that yeast cell surface mannan also has duckweed growth-promoting activity. It was found that only the main chain α-1,6 polymannose structure is necessary for its activity. It was also suggested that yeast mannan stimulates duckweed cell surface receptors as long chain polysaccharide compounds to promote the growth. We have successfully uncovered the molecular mechanism of novel plant-microbial interaction and casted a stone to understand co-evolution.
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