1. Net photosynthesis, growth rate and biomass allocation in a rhizomatous grass Calamagrostis epigejos grown at elevated CO2 concentration
- Creator:
- Gloser, J. and Barták, M.
- Format:
- Type:
- model:internalpart and TEXT
- Language:
- Multiple languages
- Description:
- Young plants of Calamagrostis epigejos (L.) Roth were grown in controlled environments with two regimes of CO2 in the air: normál (350 cm^ m'^) and elevated (700 cm^ m‘3). The relative growth rate of plants grown at elevated CO2 was increased by about 20 % in comparison with control plants cultivated at ambient CO2 concentration. Partitioning of assimilates into roots (+ rhizomes) and shoots was the same in both treatments. Slightly lower values of specifíc leaf area, leaf mass ratio and leaf area ratio were found in the plants grown at elevated CO2. The net photosynthetic rate (P^) was measured gasometrically in plants from both treatments at 350 and 700 cm^ m"^ CO2 in the leaf chamber. There were no signifícant differences between plants grown at either CO2 concentration in their responses to radiation and CO2 conditions during measurements, i.e., no regulation of photosynthetic processes in response to elevated CO2 was detectable. at saturating irradiance and maximum apparent quantum yield of photosynthesis were always considerably higher at doubled CO2 concentration during measurements.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public