Eyespot apparatus
For other uses, see Eyespot.
Schematic representation of a Euglena cell with red eyespot (9)
Schematic representation of a Chlamydomonas cell with chloroplast eyespot (4)
The eyespot apparatus (or stigma) is a photoreceptive organelle found in the flagellate (motile) cells of green algae and other unicellular photosynthetic organisms such as euglenids. It allows the cells to sense light [...]