Related Experiment Video
Updated: Jun 25, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
Published on: November 16, 2013
Acclimation to High CO(2) in Monoecious Cucumbers : II. Carbon Exchange Rates, Enzyme Activities, and Starch and
M M Peet1, S C Huber, D T Patterson
1Department of Horticultural Science, North Carolina State University, Box 7609, Raleigh, North Carolina 27695-7609.
Abstract:
Carbon exchange capacity of cucumber (Cucumis sativus L.) germinated and grown in controlled environment chambers at 1000 microliters per liter CO(2) decreased from the vegetative growth stage to the fruiting stage, during which time capacity of plants grown at 350 microliters per liter increased. Carbon exchange rates (CERs) measured under growth conditions during the fruiting period were, in fact, lower in plants grown at 1000 microliters per liter CO(2) than those grown at 350. Progressive decreases in CERs in 1000 microliters per liter plants were associated with decreasing stomatal conductances and activities of ribulose bisphosphate carboxylase and carbonic anhydrase. Leaf starch concentrations were higher in 1000 microliters per liter CO(2) grown-plants than in 350 microliters per liter grown plants but calcium and nitrogen concentrations were lower, the greatest difference occurring at flowering. Sucrose synthase and sucrose-P-synthase activities were similar in 1000 microliters per liter compared to 350 microliters per liter plants during vegetative growth and flowering but higher in 350 microliters per liter plants at fruiting. The decreased carbon exchange rates observed in this cultivar at 1000 microliters per liter CO(2) could explain the lack of any yield increase (MM Peet 1986 Plant Physiol 80: 59-62) when compared with plants grown at 350 microliters per liter.
More Related Videos
10:19A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function
Published on: November 21, 2015
09:02Building and Operating a Low-Cost Elevated Carbon Dioxide Growth Chamber to Evaluate Microgreen Physiology under Spaceflight-Relevant CO2 Levels
Published on: April 17, 2026
Related Concept Videos
C4 Pathway and CAM
C4 Pathway
The C4 pathway is used by plants such as...
Regulation of Transpiration by Stomata
Adaptations that Reduce Water Loss
Responses to Heat and Cold Stress
The Calvin Benson Cycle
Carbon-dioxide Fixation