There are 3 limiting
factors of photosynthesis, carbon dioxide concentration, temperature and light
intensity. All 3 of
these factors can be controlled in glasshouses to increase crop yield.
The increase in heat allows the rate of photosynthesis to
increase because there is more kinetic energy.
The temperature will
controlled in a glasshouse, to optimum temperature. At optimum temperature
enzymes are at peak
activity. If the heat is too high the enzymes will start to denature so it is
important
to keep the
temperature constant.
Carbon dioxide is a
reactant in the process of photosynthesis, so an increase in carbon dioxide
concentration will
mean an increase in the rate of reaction. With more reactant, there is more
product,
so with more carbon
dioxide there is more glucose/ energy produced. *there is a point where the
rate of
photosynthesis can’t
go any faster*
Since the rate of
photosynthesis is increased, the plant produces more energy which can be used
for
growth, therefore: an
increase in temperature or carbon dioxide concentration in a glasshouse à faster
rate of reaction à more energy à increase in growth à increase in crop yield
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