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conditions ( Table 1 ), after more than 5 months of CO 2 enrichment the plants grown in the elevated CO 2 chambers had consistently greater net assimilation rates across all N treatments ( Table 1 ). However, decomposition of the A - C i curves showed

(j), leaf net assimilation rate (P nl , μmol·m −2 ·s −1 ), and atmospheric pressure (θ, Pa) as proposed for potted roses ( Ball et al., 1987 ; Kim and Lieth, 2003 ); k is the conversion factor from [m 2 ·s·mol −1 ] to [s·m −1 ] with 0.025 ( Jones

storage and internal cycling of remobilized N. Strawberry plants accumulate biomass in response to CO 2 enrichment ( Chen et al., 1997b , 1997c ). Under high CO 2 conditions, leaf net assimilation rate increased, leading to enhanced vegetative

(1997) found that salvia ( Salvia sp.) seedlings grown in trays with 7.3-cm 3 root volumes suffered from root restriction and had decreased net assimilation rates compared with trays with 55-, 166-, and 510-cm 3 root volumes. Latimer (1991) also

). Moreover, growth traits, including relative growth rate (RGR), net assimilation rate (NAR), and leaf area ratio (LAR), are greatly dependent on the efficiency with which intercepted radiation is transformed into DW ( Dapoigny et al., 2000 ). Nutrient

of 370 μmol·mol −1 and then to estimate the net assimilation rate at this C i . The gas-phase resistance for CO 2 assimilation, consisting of the boundary layer and stomatal resistance, was calculated as (CO 2,air − C i )/ A n . Mesophyll

HortScience 43 1944 1946 Bruggink, G.T. Heuvelink, E. 1987 Influence of light on the growth of young tomato, cucumber and sweet pepper plants in the greenhouse: Effects on relative growth rate, net assimilation rate and leaf area ratio Scientia Hort. 31 3 1737

carboxylation efficiency were obtained from analysis of so-called “A-C i curves” [i.e., response curves of net assimilation rate versus leaf internal CO 2 concentration, where A = P n ( Farquhar and Sharkey, 1982 )]. Complete A-C i curves were obtained for a

supplemental CO 2 . Morison and Gifford (1983) reported that the stomatal conductance ( g S ) of plants decreases under elevated CO 2 , whereas the internal concentration of CO 2 increases and net assimilation rate is either unaffected or increased ( Mott

(from day 4 to day 30 or 33), and at a 50% higher DLI, which could cause different responses. The relative growth rate of a plant is a function of its leaf area ratio and the net assimilation rate ( Lambers et al., 2008 ). The leaf area ratio indicates