Acclimation to high CO/sub 2/ in monoecious cucumbers. II. Carbon exchange rates, enzyme activities, and starch and nutrient concentrations. [Cucumis sativus L]

Journal Article · Tue Dec 31 23:00:00 EST 1985 · Plant Physiol.; (United States)

OSTI ID:5614999

Peet, M M; Huber, S C; Patterson, D T

Carbon exchange capacity of cucumber (Cucumis sativus L.) germinated and grown in controlled environment chambers at 1000 microliters per liter CO/sub 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/sub 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/sub 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/sub 2/ could explain the lack of any yield increase when compared with plants grown at 350 microliters per liter.

• Research Organization: North Carolina State Univ., Raleigh
• OSTI ID: 5614999
• Journal Information: Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 80:1; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKALINE EARTH METALS
BIOLOGICAL ADAPTATION
BIOLOGICAL EFFECTS
CALCIUM
CARBOHYDRATES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON DIOXIDE FIXATION
CARBON OXIDES
CARBON-CARBON LYASES
CARBON-OXYGEN LYASES
CARBONIC ANHYDRASE
CARBOXY-LYASES
CARBOXYLASE
CHALCOGENIDES
CHEMICAL ANALYSIS
CUCUMBERS
DATA
DISACCHARIDES
ELEMENTS
ENZYME ACTIVITY
ENZYMES
EXPERIMENTAL DATA
EXPOSURE CHAMBERS
FLOWERS
FOOD
GERMINATION
GROWTH
HYDRO-LYASES
INFORMATION
KETONES
LEAVES
LYASES
METALS
MONOSACCHARIDES
NITROGEN
NONMETALS
NUMERICAL DATA
NUTRIENTS
OLIGOSACCHARIDES
OPENINGS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PENTOSES
PLANT GROWTH
PLANTS
POLYSACCHARIDES
PRODUCTIVITY
QUANTITY RATIO
REAGENTS
RIBULOSE
SACCHARIDES
SACCHAROSE
SEEDS
STARCH
STOMATA
VEGETABLES