Fujikake, H., Yamazaki, A., Ohtake, N., Sueyoshi, K., Matsuhashi, S., Ito, T., Mizuniwa, C., Kume, T., Hashimoto, S., Ishioka, N.S., Watanabe, S., Osa, A., Sekine, T., Uchida, H., Tsuji, A. and Ohyama, T. (2003) Quick and reversible inhibition of soybean ROOT nodule growth by nitrate involves a decrease in sucrose supply to nodules. Journal of Experimental Botany, 54, 1379-1388.