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Report No.

Imaging of root exudates secreted from soybean root to soil by using carbon-11-labeled carbon dioxide and PETIS

Yin, Y.-G.; Suzui, Nobuo; Kawachi, Naoki; Ishii, Satomi; Yamazaki, Haruaki; Koyanagi, Atsushi*; Fujimaki, Shu

The root of higher plant has important role in absorb essential nutrients critical to life. On the other hand, the root evolved special abilities to uptake of nutrients from the rhizosphere environment because that is fixed in the soil. As one example, the roots secrete organic acids to surrounding of rhizosphere for solubilization of the insoluble mineral in soil and absorb directly or indirectly of the nutrition. Previously, our group has reported that imaging of cadmium (Cd) uptake from hydroponic culture solution to root for study the mechanism of mineral metabolism by using a positron-emitting tracer imaging system (PETIS) in plant. In this study, we performed the imaging of organic matter which is exudate from root to soil cultivation by using carbon-11-labeled carbon dioxide ($$^{11}$$CO$$_{2}$$) gas tracer with PETIS.



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