Well done!
Question:
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.
Response:
The rate of respiration decreases with temperature.
What is the source of carbon that is assimilated in photosynthesis?
Soil nutrients
Atmospheric CO2
Solar radiation
Soil water
Photoinhibition means the decrease in photosynthesis due to
exposure to excess of CO2.
exposure to excess of light.
exposure to shortage of soil moisture.
exposure to high temperature.
exposure to excess of light
exposure to excess of CO2
exposure to high temperature
exposure to shortage of soil moisture
Carbon capture is performed by the green parts of plants via photosynthesis.
To transform atmospheric CO2 into organic molecules, plants can use the energy from
soil heat.
soil nutrients.
atmospheric oxygen.
sun light.
A complex microbiota lives belowground, releasing carbon dioxide to the soil.
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.
When there is low soil moisture, plants close its stomata pores which then decreases photosynthesis.
De-hardening in spring involves gradual re-hydration of the cells, recovery of photosynthetic capacity and a tight control of water loss.
The annual cycle of photosynthesis mainly follows
the changes in soil temperature.
the changes in air temperature.
the changes in light.
the changes in CO2 concentration.
In general, the more carbon dioxide that is available to the plant, the faster the rate of photosynthesis - if other factors are favourable.
Transpiration decreases as air becomes drier.
Photosynthesis of a tree canopy is driven or influenced by
air temperature (T).
soil moisture (REW).
air humidity (VPD).
photosynthetically active solar radiation (PAR).
atmospheric CO2.
the total leaf area (LAI).
Early spring is a tricky time for plants due to the combination of sunny but still quite cold days.
