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Effects of Carbon Dioxide Enrichment on the Growth and Morphology of Kudzu (Pueraria lobata)

Published online by Cambridge University Press:  12 June 2017

Thomas W. Sasek
Affiliation:
Duke Phytotron, Dep. Bot., Duke Univ., Durham, NC 27706
Boyd R. Strain
Affiliation:
Duke Phytotron, Dep. Bot., Duke Univ., Durham, NC 27706

Abstract

Kudzu (Pueraria lobata Ohwi # PUELO) was grown from seeds in controlled-environment chambers at 350, 675, or 1000 μl·1−1 CO2. Biomass and leaf area production, morphological characteristics, and growth analysis components were determined at 14, 24, 45, and 60 days after emergence. At 60 days, plants grown at 1000 μl·1−1 CO2 had 51% more biomass, 58% longer stems, and 50% more branches than plants grown at 350 μl·1−1 CO2. Plants grown at 675 μl·1−1 CO2 were intermediate. Growth analysis components indicated that CO2 enrichment increased growth by compounding effects due to increased net assimilation rates and increased leaf area duration. Relative growth rates were not significantly affected. The large CO2-induced increase in stem height versus stem diameter is in marked contrast to previously reported responses of woody erect growth forms. Possible ecological implications for competitive abilities are discussed.

Type
Weed Biology and Ecology
Copyright
Copyright © 1988 by the Weed Science Society of America 

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