Plants excrete waste through various processes like through stomata, leaf fall, gum oozing, and storage in cells. Stomata allow excess water and gases like carbon dioxide to exit leaves during photosynthesis. Deciduous plants shed leaves to remove stored waste compounds. Gum and resins may ooze from stems, while crystals and oils are stored in cells. Leaf fall provides autumn colors as chlorophyll breaks down, revealing other leaf compounds before abscission and shedding of leaves occurs.

2. Excretion in plants
By
Neethu Sivan

4. Excretion through stomata

5. Other excretory products of plants
Gum oozes out of a branch/ stem and is
excreted that way
Calcium oxalate crystals and oil stored
in cells

6. • Leaf fall: Deciduous plants like tobacco, tea, almond, get rid of excretory
waste, stored within leaves, through leaf fall.
• Waste compounds are often stored in dead heartwood, bark and leaves
which die/fall off.
• When chlorophyll breaks down, other compounds in leaves give the
characteristic autumn colours seen just before leaf fall.

7. Hydathodes

8. Formation of heartwood

9. Questions
• Which are the excretory parts in plants?
• How the stomata functioned in the process of excretion?
• Distinguish the process occurring in the excretion of plants?
• What is meant by Abscission in plants?
• How the excretion differ in animals and pants?
• Explain the process occurring in plant exeretion ?

10. Home work
• Write a note on excretion in plants in your science diary
• Make a chart showing the excretion in plants