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.
Eftersom koldioxid kommer in i växten genom klyvöppningarna går assimilationen långsammare då klyvöppningarna tillsluts.
Photoinhibition means the decrease in photosynthesis due to
exposure to shortage of soil moisture.
exposure to excess of CO2.
exposure to high temperature.
exposure to excess of light.
The air is moist if VPD (Vapour Pressure Deficit) is high.
When there is low soil moisture, plants close its stomata pores which then decreases photosynthesis.
The effect of light on photosynthesis has a clear saturating pattern: more light results in more photosynthesis but eventually leaves cannot take full advantage of all the extra light.
Då VPD ökar blir assimilationen långsammare eftersom växten tillsluter sina klyvöppningar.
High soil moisture leads to decreased photosynthesis.
In boreal upland forests, low soil moisture decreases the rate of photosynthesis.
In trees, approximately half of the carbon bound in photosynthesis is used for construction of new biomass.
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.
REW stands for "Relative Extractable Water"
As VPD increases, photosynthesis decreases due to the closure of the stomata.
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.
Plants open its stomata to avoid losing too much water.
Plant closes its stomata to avoid losing too much water.
Låga växter, mikroberna i marken och markens funktioner i allmänhet drar under vintern nytta av.
Välj ett alternative.
snöns isolerande inverkan
trädens långsammare aktivitet
den ringa mängden solljus
de låga temperaturerna