Response of young barley plants to CO2enrichment
- 1 October 1994
- journal article
- Published by Oxford University Press (OUP) in Journal of Experimental Botany
- Vol. 45 (10) , 1373-1378
- https://doi.org/10.1093/jxb/45.10.1373
Abstract
Barley (Hordeum vulgare L. cv. Digger) was grown for 22 d in enclosed chambers with a CO2 enrichment of 35, 155, 400 or 675 μmol CO2 mol1. CO2 enrichment increased photosynthetic capacity in the plants grown at either of the two highest levels of pCO2. A CO2 enrichment of 675μmol CO2 caused a significant increment of shoot dry weight, whereas no changes were observed in fresh weight, chlorophyll or protein levels. At a light intensity of 860μmol m−2s−1 CO2 enrichment caused photosynthetic capacity to increase by 250%, whereas no effect was observed at 80 μmol m−2 s−1. Over time, photosynthesis decreased by 70% independent of CO2. A time-dependent increase in the level of extractable fructose was observed whereas total extractable carbohydrate only changed slightly.Keywords
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