Allocation Patterns in Two Tropical Vines in Response to Increased Atmospheric CO 2

Our study addresses two questions. (a) When net primary productivity increases in tropical vines, is there an increasing allocation of the gains to growth in height? (b) Are allocation patterns of vines from different types of tropical forests similar or different? 2. We chose congeneric tuberous vines from two types of tropical forest (Psiguria racemosa from tropical premontane moist forest and Psiguria umbrosa from tropical dry forest) and grew seedlings at three concentrations of ambient CO 2 in controlled environment chambers