Percent Dry Weight (Biomass) Increases for
300, 600 and 900 ppm Increases in the Air's CO2 Concentration:


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Hypericum perforatum L. (St. John's Wort)


Statistics
 
300 ppm
600 ppm
900 ppm
 Number of Results
1
1
3
 Arithmetic Mean
72%
107%
32%
 Standard Error
0%
0
0%

Individual Experiment Results

Journal References

Experimental Conditions
300 ppm
600 ppm
900 ppm

Mosaleeyanon et al. (2005)

Well watered and fertilized seedlings grown for 45 days in pots in controlled environment chambers at low light intensity (100 ?mol m-2 s-1)
 

 

32%

Mosaleeyanon et al. (2005)

Well watered and fertilized seedlings grown for 45 days in pots in controlled environment chambers at low light intensity (300 ?mol m-2 s-1)
 

 

32%

Mosaleeyanon et al. (2005)

Well watered and fertilized seedlings grown for 45 days in pots in controlled environment chambers at low light intensity (600 ?mol m-2 s-1)
 

 

32%

Save et al. (2007)

Well watered and fertilized plants grown for seven months in greenhouse compartments in 3-L plastic pots filled with a 2:1 mixture of peat and perlite
72%

 

 

Zobayed and Saxena (2004)

Plants grown from small shoots for 42 days in controlled environment chambers and a glasshouse; cv. 'New Stem'
 

107%

 

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