300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Hypericum perforatum L. [St. John's Wort]
300 ppm
|
600 ppm
|
900 ppm
|
|
Number of Results |
|
1
|
|
Arithmetic Mean |
|
116%
|
|
Standard Error |
|
0
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
Zobayed and Saxena (2004) |
Plants grown from small shoots for 42 days in controlled environment chambers and a glasshouse; cv New Stem
|
|
116% |
|