Varied growth response of cogongrass ecotypes to elevated CO2
| Autor: | Stephen A. Prior, H. Allen Torbert, Ludovic J. A. Capo-chichi, Edzard van Santen, G. Brett Runion |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Imperata Perennial plant Plant Science Biology lcsh:Plant culture Imperata cylindrica 01 natural sciences Invasive species nitrogen use efficiency Dry weight Botany Ornamental plant lcsh:SB1-1110 Water-use efficiency global change Original Research Ecotype global climate change Water use efficiency 04 agricultural and veterinary sciences Carbon Dioxide biology.organism_classification Agronomy invasive weed 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Weed 010606 plant biology & botany |
| Zdroj: | Frontiers in Plant Science, Vol 6 (2016) Frontiers in Plant Science |
| DOI: | 10.3389/fpls.2015.01182/full |
| Popis: | Cogongrass [Imperata cylindrica (L.) P. Beauv] is an invasive C4 perennial grass which is listed as one of the top ten worst weeds in the world and is a major problem in the Southeast US. Five cogongrass ecotypes (Florida, Hybrid, Louisiana, Mobile, and North Alabama) collected across the Southeast and a red-tip ornamental variety were container grown for six months in open top chambers under ambient and elevated (ambient plus 200 ppm) atmospheric CO2. Elevated CO2 increased average dry weight (13%) which is typical for grasses. Elevated CO2 increased height growth and both nitrogen and water use efficiencies, but lowered tissue nitrogen concentration; again, these are typical plant responses to elevated CO2. The hybrid ecotype tended to exhibit the greatest growth (followed by Louisiana, North Alabama, and Florida ecotypes) while the red-tip and Mobile ecotypes were smallest. Interactions of CO2 with ecotype generally showed that the hybrid, Louisiana, Florida, and/or North Alabama ecotypes showed a positive response to CO2 while the Mobile and red-tip ecotypes did not. Cogongrass is a problematic invasive weed in the southeastern U.S. and some ecotypes may become more so as atmospheric CO2 continues to rise. |
| Databáze: | OpenAIRE |
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