The balance between shoot and root growth of oil palm
seedlings under elevated CO2 is presented in Fig. 6. Oil
palm seedlings mostly partitioned their biomass to the
shoot from week 3 to 15. No significant difference was
observed throughout the weeks. Shoot to root ratio of oil
palm seedlings was not affected by the progeny, CO2
treatments or their interaction. However, there was an
increasing trend in shoot:root ratio for plants under elevated
CO2 (800 and 1,200 lmol/mol) throughout the
experiment period compared to the control, implying that
there was higher investment of seedling to the shoot under
elevated CO2.