Photosynthesis (Net CO2 Exchange Rate) References
Polygonum sachalinense [Giant Knotweed]

Onoda, Y., Hirose, T. and Hikosaka, K. 2007. Effect of elevated CO2 levels on leaf starch, nitrogen and photosynthesis of plants growing at three natural CO2 springs in Japan. Ecological Research 22: 475-484.

Osada, N., Onoda, Y. and Hikosaka, K. 2010. Effects of atmospheric CO2 concentration, irradiance, and soil nitrogen availability on leaf photosynthetic traits of Polygonum sachalinense around natural CO2 springs in northern Japan. Oecologia 164: 41-52.

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