Plant Cells And Tissues

Largest organelle in a mature plant cell, taking up 90% of cell volume ( purple color in water lily)

Pigment and antioxidants in plants

Cell wall and protoplast

cell wall

Double membrane structure and semi-autonomous

Chloroplast:contain chlorophylls and carotenoids Chromoplasta: contain only carotenoids, appearing yellow, orange, or red, no internal membrane system Leucoplasts: lack pigments appearing colorless, for synthesis of starch ( amyloplasts, lipids , and proteins)

In matrix, flexibility and “glue”

For strength (as in wood)

Repelling water from surface

For “corky” protection from water loss

Secondary cell walls

Most common, for new growth and wound healing, thin walled, able to divide,

For strength and support, dead at maturity, lignified seconda walls, slender fibers, short

Found in strands and cylinders in stems and petioles, for support and flexibility, elongated, corners thickened with pectin

Death

Sugar water