The volatile profile of these bacteria will differ from the volatile profile of micro-organisms growing at ambient temperatures.
In contrast, the constantly moving air over experimental plots will likely be influenced by vegetation growing in ambient conditions outside the experimental plot (Fig. 1).
Leaves of tobacco plants grown under high CO2 were consistently bigger than corresponding leaves of plants growing at ambient CO2 (Table 1), and if nutrient uptake by the roots does not match plant growth a reduced nutrient content must result.
We analysed the leaf gas exchange, sap flow and growth characteristics of hybrid aspen (Populus tremula × P. tremuloides) trees growing at ambient and artificially elevated air humidity in an experimental forest plantation situated in the hemiboreal vegetation zone.
We found that the opportunistic, fast-growing Ulva exhibited increased growth rates under high pCO2 and high nutrients, with growth rates increasing three-fold above Ulva grown in ambient pCO2 and ambient nutrients.
Significant increments in leaf area and total biomass were observed under elevated CO2 in combination with ambient O3 (ECO2+and) and elevated O3 (Ecompared, compared to the plants grown under ambient concentrations (ACO2+AO3).
For example, the average time to first flowering was about 44 days in both populations when grown at ambient CO2 during the sowing experiment and was similar to that at ambient CO2 during the selection experiment (Figures 1A, 5A).
The scientists compared nutrient levels in field crops grown in ambient CO2 levels, about 380-390 perts per milliion (ppm) at the time of the work, with those grown in the elevated CO2 levels expected by 2050.
Plants grown under ambient UV radiation (280 400 nm) were compared with those grown without UV-B or UV-A/B.
