Another question – is green light important for the growth rate and photosynthesis? It’s true that there is no type of chlorophyll that peak at these wavelengths we call green and that a green plant is green because the photons is reflected. But its also known that there are co-systems that can pick up different wavelengths and transfer them to usable quanta so green is maybe not the most effective wavelengths but in some way, they are linked to the photosynthesis. Its known – from terrestrial plants that green can penetrate rather deep in the tissue and hence provide some help for the photosynthesis in deeper layer.
There is also some prove for green photons can go trough leaves and hence make some photosynthesis rather low in the canopy. I got an idea – I can test that. I took my headlight (a strong phosphorus coated white LED) and hold it above a rather thick green leave from one of my wife's potted plants. The result you can see in the pictures below. From the upper side – there is reflecting many green photons – because the green colour of the leaf.
But how its look on the backside of the leaf – there is no light or reflected green photons there. If all photons are reflected (green) or absorbed (all others) it should be black on the backside. If the backside has any colour in this experiment – it means that the photons of that special wavelengths (read colour) has travel through the leaf – look self for the result.
I have never, ever before proved a theory so easy as I did in this case. Green photons can travel through plants cells in a way that others do not! It means that leaves further down in a tree can use green wavelengths – the red and blue is already absorbed.
