Please enable JavaScript.
Coggle requires JavaScript to display documents.
Plants - Coggle Diagram
Plants
Transpiration
-
-
-
Evaporation creates shortage of water, more water drawn up from the rest of the plant through xylem vessels
This means rthat more water drawn up from roots, constant transpiration stream of water through plant
It is a side effect of the way leeaves are adapted for photosynthesis. Have stomata so gases can be exchanged easily.
Because there is more water inside the plant than air outside, water escapes from the leaves through the stomata by diffusion
Transpiration rate
Light intensity - more light = greater rate. Stomata close as it gets darker, very little water or carbon dioxide escapes
Temperature - the warmer it is = faster transpiration. When it's warm the particles from water have more energy to evaporate and diffuse out of the stomata
Air flow - better air flow = greater transpiration rate. Good airflow results in the water vapour being swept away, maintaining a low concentration
Humidity - drier the air = faster the transpiration occurs. If air is humid, more water is in the leaf so not much of a difference the inside and outside of the leaf
Photosynthesis
carbon dioxide + water --> glucose + oxygen CO2, H2O, O2 and C6H12O6 .
-
Takes place in chloroplasts in green plant cells - contain pigments like chlorophyll that absorb light
-
Rate of photosynthesis
Limiting factors
-
-
-
chlorophyll - amount in plant can vary due to disease, causing chloroplasts to become damaged or not make enough chlorophyll. Less light absorbed