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Dic Medicinal plants (PG 101) Level 1 Clinical Pharmacy-PharmD
3- Vacuoles
Mature cells of the plants have vacuoles which may enlarge to much an extent that the
cytoplasm located adjacent to the cell walls.
■ The vacuoles are filled with cell sap.
■ It is surrounded by lipoprotein membrane called tonoplast.
■ The vacuole may contain pigments as anthocyanin e.g., Colored petals.
Ergastic substance
o The materials present in the vacuoles are known as ergastic.
o They are either reserve substances that may be utilized by the protoplast, for vital
activities or they are by-products of metabolism.
o Ergastic substances occur in vacuoles and in the cell wall.
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