Growth of nicotiana in response to atmospheric CO sub 2 enrichment and various light regimes

Journal Article · Sat Apr 01 00:00:00 EST 1989 · Plant Physiology, Supplement; (USA)

OSTI ID:6936363

Pope, S; Thomas, J F ^[1]

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1. North Carolina State Univ., Raleigh (USA)

Nicotiana tabacum NCTG-22, N. tabacum Petite Havana and N. plumbaginifolia were grown in chambers (24 C, 12-h light) under daytime atmospheric CO{sub 2} levels of 340 ppm (ambient) or 1000 ppm (enriched). All 3 types of tobacco grew faster and had open flowers sooner under CO2 enrichment, but patterns of dry weight distribution varied with type of tobacco. In N. plumbaginifolia significant proportions of dry weight were allocated to stems and branches, while in tabacum types, less was allocated to stems and more to leaves and roots. Increases in dry weight due to CO2 enrichment were accompanied by increases in leaf area and thickness. Plants given a far-red low intensity night break exhibited few differences from controls except having thinner leaves under ambient CO2; but under enriched CO2, had greater total dry weight and thicker leaves containing a higher proportion of spongy mesophyll than controls. A 50% reduction in light intensity led to a comparable reduction in dry weight and leaf area across treatments.

• OSTI ID: 6936363
• Journal Information: Plant Physiology, Supplement; (USA), Vol. 89:4; ISSN 0079-2241
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CARBON DIOXIDE
TOXICITY
NICOTIANA
PLANT GROWTH
BIOMASS
EXPOSURE CHAMBERS
LEAVES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ENERGY SOURCES
GROWTH
MAGNOLIOPHYTA
MAGNOLIOPSIDA
OXIDES
OXYGEN COMPOUNDS
PLANTS
RENEWABLE ENERGY SOURCES
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