Question:
When there is low soil moisture, plants close its stomata pores which then decreases photosynthesis.
Response:
A complex microbiota lives belowground, releasing carbon dioxide to the soil.
As plants respire, they release
carbon dioxide.
oxygen.
In some part of the stems, some photosynthesis may also occur.
Photoinhibition means the decrease in photosynthesis due to
exposure to high temperature.
exposure to shortage of soil moisture.
exposure to excess of light.
exposure to excess of CO2.
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.
To transform atmospheric CO2 into organic molecules, plants can use the energy from
soil heat.
soil nutrients.
sun light.
atmospheric oxygen.
Photosynthesis of a tree canopy is driven or influenced by
air humidity (VPD).
photosynthetically active solar radiation (PAR).
the total leaf area (LAI).
air temperature (T).
soil moisture (REW).
atmospheric CO2.
What is the source of carbon that is assimilated in photosynthesis?
Solar radiation
Soil nutrients
Soil water
Atmospheric CO2
Carbon becomes locked as part of the accumulating plant biomass as plants grow.
Carbon capture is performed by the green parts of plants via photosynthesis.
Transpiration decreases as air becomes drier.
High soil moisture leads to decreased photosynthesis.
In boreal upland forests, low soil moisture decreases the rate of photosynthesis.
Almost half of the total biomass of a tree may be allocated to the roots.
Early spring is a tricky time for plants due to the combination of sunny but still quite cold days.
