Acclimation of Lolium temulentum to enhanced carbon dioxide concentration
1994
Gay, A.P. | Hauck, B.
Acclimation of single plants of Lolium temulentum to changing [CO2] was studied on plants grown in controlled environments at 20 degrees C with an 8 h photoperiod. in the first experiment plants were grown at 135 micromole m-2 s-1 photosynthetic photon flux density (PPFD) at 415 microliter l(-1) or 550 microliter l(-1) [CO2] with some plants transferred from the lower to the higher [CO2] at emergence of leaf 4. In the second experiment plants were grown at 135 and 500 micromole m-2 s-1 PPFD at 345 and 575 microliter 1(-1) [CO2]. High [CO2] during growth had little effect on stomatal density, total soluble proteins, chlorophyll a content, amount of Rubisco or cytochrome f. However, increasing [CO2] during measurement increased photosynthetic rates, particularly in high light. Plants grown in the higher [CO2] had greater leaf extension, leaf and plant growth rates in low but not in high light. The results are discussed in relation to the limitation of growth by sink capacity and the modifications in the plant which allow the storage of extra assimilates at high [CO2].
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library