Nutrient remobilization and C:N:P stoichiometry in response to elevated CO and low phosphorus availability in rice cultivars introgressed with and without Pup1.

The continuously rising atmospheric CO concentration potentially increase plant growth through stimulating C metabolism; however, plant C:N:P stoichiometry in response to elevated CO (eCO) under low P stress remains largely unknown. We investigated the combined effect of eCO and low phosphorus on growth, yield, C:N:P stoichiometry, and remobilization in rice cv. Kasalath (aus type), IR64 (a mega rice variety), and IR64-Pup1 (Pup1 QTL introgressed IR64).