Fig. 8.

P-use efficiency of wild-type (WT) rice and of transgenic plants with OsPAP10c driven by the constitutive ubiquitin promoter (UP) or the native promoter (NP) grown either with or without Pi, or with ATP as the only source of P. Germinated seeds were grown in normal nutrient solution for 15 d and then transferred to different solutions for 10 d. (A, B) P-use efficiency ratio of the genotypes under the different treatments. P-use efficiency was defined as the amount of biomass produced by a given amount of P content in the tissue. (C, D) Total P content of the genotypes under the different treatments. Data are means (±SEM) of three replicates. Significant differences compared with the WT were determined using Turkey’s test (*P<0.05; **P<0.01).