Effect of CO/sub 2/ enrichment on growth and reproduction of wheat grown under low oxygen. [Triticum aestivum]

Conference · Wed Apr 01 00:00:00 EST 1987 · Plant Physiol., Suppl.; (United States)

OSTI ID:5516607

Musgrave, M E; Scheld, H W; Strain, B R

Two cultivars of wheat (Triticum aestivum L. cvs Sonoita and Yecoro Rojo) were grown to maturity in a Phytotron B chamber within four sub-chambers which imposed two CO/sub 2/ levels (350 or 1000 ppm) at either ambient (21%) or low oxygen (5%). Techniques of growth analysis were used to characterize changes in plant carbon budgets imposed by the gas regimes. Large increases in leaf area were seen in the low oxygen treatments, due primarily to a stimulation of tillering. No necrosis was observed in roots developing at 5% oxygen but rather root development increased dramatically. Flowering was much delayed in the low oxygen, 350 ppm carbon dioxide regime and the spikes which did develop did not mature. While one cultivar (Sonoita) did not respond to CO/sub 2/ enrichment (1000 ppm) at ambient oxygen in terms of increases in leaf area and head number, carbon dioxide enrichment overcame the low oxygen effect on flowering in both cultivars. The results demonstrate a previously unknown interaction between carbon dioxide enrichment and low oxygen as they affect reproduction and may help elucidate the nature of low-oxygen-induced infertility.

• Research Organization: Duke Univ., Durham, NC
• OSTI ID: 5516607
• Report Number(s): CONF-8707108-
• Journal Information: Plant Physiol., Suppl.; (United States), Vol. 83:4; Conference: Annual meeting of the American Society of Plant Physiologists, St. Louis, MO, USA, 19 Jul 1987
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
CARBON DIOXIDE
BIOLOGICAL EFFECTS
WHEAT
PLANT GROWTH
REPRODUCTION
BIOLOGICAL STRESS
CHRONIC EXPOSURE
CONTROLLED ATMOSPHERES
EXPOSURE CHAMBERS
FERTILITY
FLOWERS
LEAVES
OXYGEN
ROOTS
ATMOSPHERES
CARBON COMPOUNDS
CARBON OXIDES
CEREALS
CHALCOGENIDES
ELEMENTS
GRASS
GROWTH
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLANTS
560300* - Chemicals Metabolism & Toxicology
551000 - Physiological Systems