At low air humidity, a plant closes its stomata to prevent transpiration. The action also decreases photosynthesis
High soil moisture leads to decreased photosynthesis.
In boreal upland forests, low soil moisture decreases the rate of photosynthesis.
What is the source of carbon that is assimilated in photosynthesis?
Almost half of the total biomass of a tree may be allocated to the roots.
Transpiration decreases as air becomes drier.
When there is low soil moisture, plants close its stomata pores which then decreases photosynthesis.
To transform atmospheric CO2 into organic molecules, plants can use the energy from
De-hardening in spring involves gradual re-hydration of the cells, recovery of photosynthetic capacity and a tight control of water loss.
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.
The rate of respiration decreases with temperature.
Plant respiration captures CO2.
Unlike photosynhesis, plant respiration captures atmospheric oxygen and releases carbon dioxide.
Early spring is a tricky time for plants due to the combination of sunny but still quite cold days.
Carbon becomes locked as part of the accumulating plant biomass as plants grow.
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.
Plants open its stomata to avoid losing too much water.
Plant closes its stomata to avoid losing too much water.