....skip...
> If the CO2 is in short supply ie. it is the limiting factor, then any
> increase in CO2 concentration around the plant will produce an increase
in
> the rate of photosynthesis.
>> If CO2 is not in short supply, and say light energy is in short supply
ie.
> light energy is the limiting factor, then an increase in CO2
concentration
> will not bring an increase in the rate of photosynthesis.
...skip...
In natural conditions CO2 availability is normally a limiting factor. In
spite of this a global increase in atmospheric CO2 has been observed in the
last decades. The apparent contraddiction is probably explainable in term
of global distribution of the gas. However, an estimate of the global plant
productivity is very difficult to obtain.
Regards...
p.s. CO2 fumigation is a practice sometimes used in greenhouses to improve
productivity.
--
Massimo Ciscato
L.U.C. -Dept. SBG - Laboratory of Botany
Universitaire Campus
B-3590 Diepenbeek Belgium
Tel. +32 11 268378 Fax. +32 11 268301
