experiment - chlorophyll needed for photosynthesis

what plant to use?

use a potted plant with variegated leaves. (green for part of leaf - where there is chlorophyll and yellow/white for other part - no chlorophyll)

Destarching plant process

take plant and place in a dark cupboard so that its leaves do not contain starch.

Instructions

destarch plant

bring back into light and leave in daylight for several hours

test for starch (like in other experiment)

spread leaf out on a white tile

cover leaf with iodine solution

Expected results

Orange/brown colour on white part of leaf (no chlorophyll). no starch present as there is no chlorophyll.

blue/black on green part of the leaf (containing chlorophyll). starch present because there is chlorophyll.