Response of two wheat cultivars to CO sub 2 enrichment under subambient oxygen conditions

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · Plant Physiology; (USA)

DOI:https://doi.org/10.1104/pp.87.2.346· OSTI ID:5560000

Musgrave, M E; Strain, B R ^[1]

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1. Duke Univ., Durham, NC (USA)

Two cultivars of wheat (Triticum aestivum L. cvs Sonoita and Yecora Rojo) were grown to maturity in a growth chamber within four subchambers under two CO{sub 2} levels at either ambient or low O{sub 2}. Growth analysis was used to characterize changes in plant carbon budgets imposed by the gas regimes. Large increases in leaf areas were seen in the low O{sub 2} treatments, due primarily to a stimulation of tillering. Roots developed normally at 5% O{sub 2}. Seed development was inhibited by the subambient O{sub 2} treatment, but this effect was overcome by CO{sub 2} enrichment at 1000 microliters per liter. Dry matter accumulation and seed number responded differently to the gas treatments. The greatest dry matter production occurred in the low O{sub 2}, high CO{sub 2} treatment, while the greatest seed production occurred in the ambient O{sub 2}, high CO{sub 2} treatment. Growth and assimilation were stimulated more by either CO{sub 2} enrichment or low O{sub 2} in cv Yecora Rojo than in Sonoita. These experiments are the first to explore the effect of whole plant low O{sub 2} treatments on growth and reproduction. The finding that CO{sub 2} enrichment overcomes low O{sub 2}-induced sterility may help elucidate the nature of this effect.

• OSTI ID: 5560000
• Journal Information: Plant Physiology; (USA), Journal Name: Plant Physiology; (USA) Vol. 87:2; ISSN 0032-0889; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CEREALS
CHALCOGENIDES
ELEMENTS
GRAMINEAE
GROWTH
LILIOPSIDA
MAGNOLIOPHYTA
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PLANT GROWTH
PLANTS
PRODUCTIVITY
SENSITIVITY
WHEAT