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Question:
Carbon becomes locked as part of the accumulating plant biomass as plants grow.
Response:
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.
exposure to shortage of soil moisture
exposure to excess of CO2
exposure to excess of light
exposure to high temperature
Plant respiration captures CO2.
Unlike photosynhesis, plant respiration captures atmospheric oxygen and releases carbon dioxide.
To transform atmospheric CO2 into organic molecules, plants can use the energy from
soil heat.
soil nutrients.
atmospheric oxygen.
sun light.
What is the source of carbon that is assimilated in photosynthesis?
Soil nutrients
Atmospheric CO2
Soil water
Solar radiation
A complex microbiota lives belowground, releasing carbon dioxide to the soil.
In some part of the stems, some photosynthesis may also occur.
Photosynthesis of a tree canopy is driven or influenced by
soil moisture (REW).
atmospheric CO2.
air humidity (VPD).
the total leaf area (LAI).
photosynthetically active solar radiation (PAR).
air temperature (T).
In general, the more carbon dioxide that is available to the plant, the faster the rate of photosynthesis - if other factors are favourable.
Early spring is a tricky time for plants due to the combination of sunny but still quite cold days.
When there is low soil moisture, plants close its stomata pores which then decreases photosynthesis.
Transpiration decreases as air becomes drier.
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.
At low air humidity, a plant closes its stomata to prevent transpiration. The action also decreases photosynthesis
Plants open its stomata to avoid losing too much water.
Plant closes its stomata to avoid losing too much water.
