Question

where do middle lamella present in fruits?​

Answer 1

Answer:

In such cases, the two adjacent primary walls and the middle lamella, and perhaps the first layer of the secondary wall of each cell, may be called a compound middle lamella. When the middle lamella is degraded by enzymes, as happens during fruit ripening, the adjacent cells will separate.

Answer 2

Answer:

between two ajdacent cell wall

it doesn't depend on fruit or stem or any other plant part