@article{MAKHILLBRJ20081328624,
    title = {Effects of Elevated Atmospheric CO<SUB>2</SUB> on a C<SUB>3</SUB> and a C<SUB>4</SUB> Invasive Weed},
    journal = {Botany Research Journal},
    volume = {1},
    number = {3},
    pages = {56-62},
    year = {2008},
    issn = {1995-4751},
    doi = {brj.2008.56.62},
    url = {https://makhillpublications.co/view-article.php?issn=1995-4751&doi=brj.2008.56.62},
    author = {G.B. Runion,A.J. Price,S.A. Prior,H.H. Rogers,H.A. Torbert and},
    keywords = {Carbon dioxide,Cassia obtusifolia,invasive weeds,johnsongrass,sicklepod,Sorghum halepense},
    abstract = {Invasive plants are a major threat to the earth’s biodiversity and cost U.S. producers $34 billion annually. Understanding how increased atmospheric CO<SUB>2</SUB> may alter establishment, spread and control of invasive weeds is crucial to future management strategies. Here we report on the effects of elevated CO<SUB>2</SUB> on growth of 2 invasive weeds important to Southeastern U.S. agriculture. Sicklepod (<I>Cassia obtusifolia</I> L.; C<SUB>3</SUB> legume) and Johnsongrass (<I>Sorghum halepense</I> (L.) Pers.; C<SUB>4</SUB> grass) were grown at either 375 µmol mol<SUP>-1</SUP> (ambient) or 575 µmol mol<SUP>-1</SUP> (elevated) CO<SUB>2</SUB> in open top field chambers. Photosynthesis, morphology and biomass were assessed. Growth in elevated CO<SUB>2</SUB> increased photosynthetic rate and water use efficiency for both species. While both species increased leaf and stem dry weights when grown under elevated CO<SUB>2</SUB>, the sicklepod tended to be more responsive than was Johnsongrass. Both plants tended to partition less total dry weight to reproductive structures when grown under high CO<SUB>2</SUB>. This study suggests that while both weeds are likely to increase in importance, sicklepod may be more of a problem than Johnsongrass in a future CO<SUB>2</SUB>-enriched world; this prediction may change if reproductive success is negatively impacted by elevated CO<SUB>2</SUB> and this potential deserves further investigation.}
    }