| Popis: |
SummaryDifferent systems of CO2 enrichment and heating were used to produce glasshouse atmospheres with varying concentrations of NOx and CO2 (ambient NOx and CO2, ambient NOx and 1000 vpm CO2, and three concentrations of NOx varying between 0.5 and 2.5 vpm with concurrent CO2 concentrations between 1000−2500 vpm). The growth response of winter lettuce in these environments was assessed for three contrasting culti- vars (Ambassador, Berlo and Pascal). Contents of ribulose-1, 5-bisphosphate carboxylase-oxygenase (RuBPco) and nitrite reductase (NiR) in the leaf tissue were also determined using immunoblotting and enzyme-linked immunosorbent assay (ELISA). ‘Ambassador’ produced the heaviest “head” weights, but on marketable criteria ‘Berlo’ performed better. COz enrichment enhanced yields, but the High NOx treatments reduced growth relative to that in the Low NOx and unpolluted environments. Growth assessments suggested a greater tolerance of NOx in cvs Berlo and Pascal than in cv. Ambassador. Immunoblots sh... |
