Germination and seedling development of soybeans in a carbon dioxide-deficient atmosphere
Journal Article
·
· Am. J. Bot.; (United States)
During the initial phase of germination and seedling development of soybeans, most of the increase in dry weight in the embryo axis occurred in the hypocotyl. The epicotyl did not undergo a rapid increase in size and dry weight until the 4th to 5th day of growth. From day 1 to 11 dry weights of the hypocotyls in the CO/sub 2/-normal and CO/sub 2/-limiting (less than 50 ppm (0.005%) atmospheric CO/sub 2/) treatments were similar. By day 13 the CO/sub 2/-normal hypocotyls had continued their rapid increase in dry weight while the dry weight of the hypocotyls grown under CO/sub 2/-limiting conditions had decreased. The parallel decrease in dry weight of the cotyledons that occurred for both CO/sub 2/ treatments (days 1 to 13) suggested that CO/sub 2/ treatments to produce significantly different patterns in utilization of lipids, total carbohydrates, or proteins in the cotyledons. The seedlings grown under either the limiting or normal CO/sub 2/ atmospheres utilized their cotyledonary carbohydrates and lipids before the proteins. Sufficient food reserves are present in the soybean cotyledon storage cells for seedling development until about day 9. Net CO/sub 2/ uptake by soybeans in a CO/sub 2/0-normal environment first occurred between days 9 to 11.
- Research Organization:
- Univ. of Minnesota, St. Paul
- OSTI ID:
- 6266681
- Journal Information:
- Am. J. Bot.; (United States), Journal Name: Am. J. Bot.; (United States) Vol. 56:9; ISSN AJBOA
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:5114617
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Related Subjects
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
COMPARATIVE EVALUATIONS
GERMINATION
GROWTH
OXIDES
OXYGEN COMPOUNDS
PLANT GROWTH
SEEDLINGS
UPTAKE
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
COMPARATIVE EVALUATIONS
GERMINATION
GROWTH
OXIDES
OXYGEN COMPOUNDS
PLANT GROWTH
SEEDLINGS
UPTAKE