As VPD increases, photosynthesis decreases due to the closure of the stomata.
Respiration is a cellular process to obtain chemical energy from
the oxidation of water.
the oxidation of organic molecules.
the oxidation soil nutrients.
the oxidation of plant tissues.
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.
In trees, approximately half of the carbon bound in photosynthesis is used for construction of new biomass.
High soil moisture leads to decreased photosynthesis.
In boreal upland forests, low soil moisture decreases the rate of 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.
"Stage of acclimation" refers to the seasonality of
the flowering activity.
the photosynthetic activity.
the litter fall activity.
the growth activity.
When there is low soil moisture, plants close its stomata pores which then decreases photosynthesis.
Photoinhibition means the decrease in photosynthesis due to
exposure to excess of light.
exposure to high temperature.
exposure to shortage of soil moisture.
exposure to excess of CO2.
Photosynthesis of a shoot can be measured by enclosing it within a chamber and following the change of
air temperature in this chamber.
water vapour concentration in the air of this chamber.
PAR radiation next to the chamber.
carbon dioxide concentration in the air of this chamber.
Eftersom koldioxid kommer in i växten genom klyvöppningarna går assimilationen långsammare då klyvöppningarna tillsluts.
Låga växter, mikroberna i marken och markens funktioner i allmänhet drar under vintern nytta av.
Välj ett alternative.
den ringa mängden solljus
snöns isolerande inverkan
de låga temperaturerna
trädens långsammare aktivitet
Då VPD ökar blir assimilationen långsammare eftersom växten tillsluter sina klyvöppningar.