J. Penuelas et al., GROWTH, BIOMASS ALLOCATION, AND PHENOLOGY RESPONSES OF PEPPER TO ELEVATED CO2 CONCENTRATIONS AND DIFFERENT WATER AND NITROGEN SUPPLY, Photosynthetica, 31(1), 1995, pp. 91-99
Fifty-day old plants of Capsicum annuum L. with two developed leaves w
ere placed into controlled environment chambers at atmospheric (350 cm
(3) m(-3), ACO(2)) and elevated (700 cm(3) m(-3), ECO(2)) CO2 concentr
ations under different nitrogen and water supply. Plant response to EC
O(2) and the modulating effect of the availability of nitrogen and wat
er were evaluated. CO2 effects were significant only after 40 d of tre
atment. An increase in plant growth and yield was found in ECO(2) plan
ts only under a good supply of both water (HW) and nitrogen (HN). Chlo
rophyll concentration responded only to N supply. Root/shoot ratio was
higher under ECO(2) only under low N (LN) and low water (LW) supply.
Leaf area and specific leaf area decreased under ECO2. Flowering and f
ructification took place earlier in ECO(2) under HN and HW. Thus, all
CO2 effects were modulated by the N and water supply and the duration
of exposure.