HORTICULTURE

Detailed explanation-1: -Sclerenchyma is a tissue composed of sclerenchyma cells. A sclerenchyma cell is a cell variable in form and size and having more or less thick, often lignified, secondary walls. It is a supporting cell and may or may not be devoid of a protoplast at maturity.

Detailed explanation-2: -Collenchyma tissue is made up of elongated living cells filled with water, and the pressure of the water against the cell walls creates a stiffness that gives celery its crunch.

Detailed explanation-3: -Collenchyma tissue (left) forms the “strings” which support celery stalks (right). Typically, collenchyma has thicker cell walls than parenchyma.