Figure 2.
Final plant dry mass (A and B), cumulative plant water use (C and D), and WP (E and F) of seedlings of two tropical tree species grown at either ambient (40 Pa) or elevated (70 Pa) CO2 partial pressure and in four soil treatments. Soil treatments were as follows: high water supply, fertilizer addition (+W+N); high water supply, no fertilizer addition (+W−N); low water supply, fertilizer addition (−W+N); and low water supply, no fertilizer addition (−W−N). O. macrocalyx is a legume and S. macrophylla is a nonlegume. Each bar represents an average of five plants. Error bars represent se.