Effects of temperature and CO/sub 2/ enrichment on carbon translocation of plants of the C/sub 4/ grass species Echinochloa crus-galli (L. ) Beauv. from cool and warm environments

Journal Article · Wed Aug 01 00:00:00 EDT 1984 · Plant Physiol.; (United States)

OSTI ID:6095282

Potvin, C; Goeschl, J D; Strain, B R

Plants of Echinochloa crus-galli from Quebec and Mississippi were grown under two thermoperiods (28/sup 0/C/22/sup 0/C, 21/sup 0/C/15/sup 0/C) and two atmospheric CO/sub 2/ concentrations (350 and 675 microliters per liter) to examine possible differential responses of northern and southern populations of this C/sub 4/ grass species. Translocation was monitored using radioactive tracing with short-lived /sup 11/C. CO/sub 2/ enrichment induced a decrease in the size of the export pool in plants of both populations. Other parameters did not strongly respond to elevated CO/sub 2/. Low temperature reduced translocation drastically for plants from Mississippi in normal CO/sub 2/ concentration, but this reduction was ameliorated at high CO/sub 2/. Overall, plants from Quebec had a higher /sup 11/C activity in leaf phloem and a higher percentage of /sup 11/C exported, whereas these northern plants had lower turnover time and smaller pool size than plants from the southern population. 22 references, 2 figures, 5 tables.

• Research Organization: Duke Univ., Durham, NC
• DOE Contract Number: AI01-81ER60012
• OSTI ID: 6095282
• Journal Information: Plant Physiol.; (United States), Vol. 75:4
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CARBON
TRANSLOCATION
CARBON DIOXIDE
BIOLOGICAL EFFECTS
GRASS
SPECIES DIVERSITY
TEMPERATURE EFFECTS
CARBON 11
CONTROLLED ATMOSPHERES
PLANT GROWTH
TRACER TECHNIQUES
ATMOSPHERES
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON OXIDES
CHALCOGENIDES
ELEMENTS
EVEN-ODD NUCLEI
GROWTH
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
MINUTES LIVING RADIOISOTOPES
NONMETALS
NUCLEI
OXIDES
OXYGEN COMPOUNDS
PLANTS
RADIOISOTOPES
560203* - Thermal Effects- Plants- (-1987)
560303 - Chemicals Metabolism & Toxicology- Plants- (-1987)