Acclimation to high CO/sub 2/ in bean
Young bean plants (Phaseolus vulgaris L. cv Seafarer) grew faster in air enriched with CO/sub 2/ (1200 microliters per liter) than in ambient CO/sub 2/ (30 microliters per liter). However, by 7 days when increases in overall growth (dry weight, leaf area) were visible, there was a significant decline (about 25%) in the leaf mineral content (N, P, K, Ca, Mg) and a drop in the activity of two enzymes of carbon fixation, carbonic anhydrase and ribulose 1,5-bisphosphate (RuBP) carboxylase under high CO/sub 2/. Although the activity of neither enzyme was altered in young, expanding leaves during the acclimation period, in mature leaves the activity of carbonic anhydrase was reduced 95% compared with a decline of 50% in the ambient atmosphere. While CO/sub 2/ enrichment might alter the flow of carbon into the glycolate pathway by modifying the activities of carbonic anhydrase or RuBP carboxylase, there is no early change in the ability of photosynthetic tissue to oxidize glycolate to CO/sub 2/.
- Research Organization:
- University of Guelph, Ontario
- OSTI ID:
- 6577746
- Journal Information:
- Plant Physiol.; (United States), Vol. 74:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON DIOXIDE
BIOLOGICAL ADAPTATION
BIOLOGICAL EFFECTS
CARBONIC ANHYDRASE
ENZYME ACTIVITY
CARBOXYLASE
OXIDOREDUCTASES
PHASEOLUS
PLANT GROWTH
CALCIUM
GLYCOLS
LEAVES
MAGNESIUM
NITROGEN
PHOSPHATES
PHOSPHORUS
POTASSIUM
RIBULOSE
ALCOHOLS
ALKALI METALS
ALKALINE EARTH METALS
CARBOHYDRATES
CARBON COMPOUNDS
CARBON OXIDES
CARBON-OXYGEN LYASES
CHALCOGENIDES
ELEMENTS
ENZYMES
GROWTH
HYDRO-LYASES
HYDROXY COMPOUNDS
KETONES
LEGUMINOSAE
LIGASES
LYASES
METALS
MONOSACCHARIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PENTOSES
PHOSPHORUS COMPOUNDS
PLANTS
SACCHARIDES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)