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Effect of elevated carbon dioxide concentration and root restriction on net photosynthesis, water relations and foliar carbohydrate status of loblolly pine seedlings
To determine the effects of CO 2 -enriched air and root restriction on photosynthetic capacity, we measured net photosynthetic rates of 1-year-old loblolly pine seedlings grown in 0.6-, 3.8-or 18.9-liter pots in ambient (360 µmol mol −1 ) or 2× ambient CO 2 (720 µmol mol −1 ) concentration for 23 weeks. We also measured needle carbohydrate concentration and water relations to determine whether feedback inhibition or water stress was responsible for any decreases in net photosynthesis. Acrossdoi:10.1093/treephys/17.10.655 pmid:14759905 fatcat:xrejh6yf2jdhtawzha2gcl3yoq