Question

function of leaf spine

Answer 1

The predominant function of thorns is deterring herbivory in a mechanical form. For this reason they are classified as physical or mechanical defenses, as opposed to chemical defenses.

Answer 2

✌️✌️ hey mate,

↪️Leaf spines:

➡️In some xerophytic plants like opuntia, the entire leaf gets modified into a small, stiff, pointed structure called spine to check Transpiration.

➡️Sometimes only a part of leaf such as stipules, get modified into spines, to protect plants from grazing animals.

thanks...
nice to help you ✌️✌️