When there is low soil moisture, plants close its stomata pores which then decreases photosynthesis.
REW stands for "Relative Extractable Water"
The stage of acclimation at any given day depends on the temperatures experienced by the plant during the previous months.
The stage of acclimation at any given day depends on the temperatures experienced by the plant during the previous days.
Plants open its stomata to avoid losing too much water.
Plant closes its stomata to avoid losing too much water.
Photoinhibition means the decrease in photosynthesis due to
exposure to shortage of soil moisture.
exposure to excess of light.
exposure to high temperature.
exposure to excess of CO2.
Då VPD ökar blir assimilationen långsammare eftersom växten tillsluter sina klyvöppningar.
Since stomata are the same pores through which carbon dioxide enters into the leaves, the result of their closure is a reduction in photosynthesis.
In trees, approximately half of the carbon bound in photosynthesis is used for construction of new biomass.
Leaf area increases with stand age, resulting in a decreasing rate of photosynthesis in the stand.
An increment in leaf area increases also the photosynthesis of a tree stand. However, the relationship is saturating.
Respiration is a cellular process to obtain chemical energy from
the oxidation of water.
the oxidation of plant tissues.
the oxidation soil nutrients.
the oxidation of organic molecules.
High soil moisture leads to decreased photosynthesis.
In boreal upland forests, low soil moisture decreases the rate of photosynthesis.
Photosynthesis of a shoot can be measured by enclosing it within a chamber and following the change of
water vapour concentration in the air of this chamber.
carbon dioxide concentration in the air of this chamber.
PAR radiation next to the chamber.
air temperature in this chamber.
Photosynthesis shuts down if the temperature of previous night has been lower than
The air is moist if VPD (Vapour Pressure Deficit) is high.
Eftersom koldioxid kommer in i växten genom klyvöppningarna går assimilationen långsammare då klyvöppningarna tillsluts.