Photosynthetic response to growth temperature and CO2 enrichment in two species of C4 grasses
- 1 March 1985
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Botany
- Vol. 63 (3) , 483-487
- https://doi.org/10.1139/b85-059
Abstract
Plants of Echinochloa crus-galli from Québec, North Carolina, and Mississippi and of Eleusine indica from Mississippi were grown under three thermoperiods (28:22, 24:18, 21:15 °C) and two atmospheric CO2 concentrations (350 and 675 μL ∙ L−1). CO2 enrichment induced an increase in net photosynthesis and in dark respiration for all populations. Neither conductance, transpiration, nor the transpiration/photosynthesis ratio were affected by CO2 enrichment. Plants showed higher photosynthetic and dark respiration rates when grown in warm regimes. Stomatal conductance did not vary with growth temperature. Cool-adapted plants from Québec maintained the overall highest net photosynthesis and respiration. Plants originating from warm areas had a weaker acclimation potential to low temperature than those from cool environments.This publication has 5 references indexed in Scilit:
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