What is chlorophil?
Chlorophil is the pigment or color in a plant.
The light effects the color inheritance of Nicotiana. If it doesn't have light it will turn out yellow If it has light it will turn out green. It needs chlorophil in order for it to have it's green pigment. Chlorophil is a green pigment implant that interacts with sunlight. The yellow plants does not have chlorophil, thats what makes them yellow