Step 1: Plant Excretory Products:
Plants also produce waste products, which they store or release in different forms such as resins, gums, latex, and tannins.
Step 2: Acacia Plants:
Acacia species (like babool, kikar) produce a large amount of gum.
Gum is a byproduct formed due to the breakdown of plant cell walls and is released through stems.
Step 3: Use of Gum:
Gum from Acacia is commercially used in adhesives, medicines, and food industries.
Step 4: Final Answer:
The main excretory substance released from acacia plants is Gum.