Transpiration and Translocation

Transpiration is the process of sugars being transported to the leaf
Translocation is the process of water being evaporated out the leaf
Photosynthesis happens in the leaf

Transpiration usually happens in the phloem cells
The phloem cells are stacked together to form a phloem tube
When the plant deposits the sugars, it could be used for energy or to store energy for future use

Xylem Tubes are located next to the phloem tube
Their role is to transport both water and mineral ions
They are made up of column of cells
However, they are dead cells, so they just form one hollow tube

Transpiration is the evaporation of water in a leaf
Transpiration happens because water is continually going out the cell
Transpiration stream is the collumn of water

The factors affecting transportation are airflow, humidity, temperature and light intensity

Light intensity:
Daylight: When it is daytime→stomata opens→more water goes out→increase in transpiration
Nighttime: Night→stomata closes→water cannot go out→decrease in transpiration

Temperature:
The warmer it is→increase in transpiration because the heat makes the water evaporate

Air flow and humidity:
The inside of a leaf is very wet because water is continously being brought up
The difference between the temperature outside and tempoerature inside is considered a concentration gradient

Therefore, the rate of transpiration depends on the strength of gradient

Air flow:
If the air flow is high (Windy), the wins will blow away the water from outside the leaf. This will cause the concentration gradient to go high, leading to an increase in transpiration

Humidity:
More humid air would decrease transpiration as the water molecules in the moist air will decrese the concentration gradient