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Structure of plants - Coggle Diagram
Structure of plants
Transpiration stream
Definition
pulls water using tension
Functions
transporting mineral ions
transporting water to leaves
keeping leaves cool
ensuring plants are damp
Properties of water that allow for transpiration stream
Cohesion and
tension
Water rises through the Xylem from the roots of plants
Development
John Joly and Henry Dixon
conducted experiments to prove that water can rise against gravity
proved that water can rise within a plant under greater atmospheric pressure
Further experiments proved that water had tension that allows it to move passively
Photosynthesis
Definition
chemical process
converts carbon dioxids and water into oxygen and glucose
Chemical word equation:
carbon dioxide + water --(sunlight)--> glucose + oxygen
Development
1 Jan Baptista
5 year experiment on willow
Incorrectly concluding that plant growth is caused by nutrients in water
subsequently concluded that plants require water
2 Joseph Priestly
Believed that plants cleaned the air
Put a mouse and candle in a jar
the flame extinguished and the mouse died
Put a moue and candle with a plant
The mouse lived and the flame continued to burn
3 Jan Igenhousz
Concluded that plants produce oxygen when exposed to sunlight
Observed bubbles on plants underwater in sunlight but not in shade
4 Jean Senebier
Discovered that plants require carbon dioxide to produce oxygen
submerged plants is weak carbonic acid and water
plant in acid produced oxygen bubbles while the other did not
5 Julius Robert Mayer
determined: energy cannot be created or destroyed
Proposed that plants convert light energy into chemical energy
