does increased light intesnity also increase chlorophyll concentration, thus increasing absorption levles?

Question

I am doing an experiment on this. Whereby I grow mung beans in different luxes (20, 40, 60, 80, 100) and then grind the leaves down from each light inesnity and place it in a spectrophotometer. I'm assuming that increasing light intensity causes chlorophyll concentration to increase to a certain point as photosynthesis rates will reach an optimum and no more chlorophyll is necessary (or plant is unable to create more). I hope that makes sense!

Answer 1

Based on a quick literature search, it looks like the opposite is actually found. It seems that as light intensity decreases, chlorophyll concentration increases and eventually plateaus. This would be an adaptive response that would allow the plant to absorb more energy than what would have otherwise been expected in low-light conditions. This change should be detectable in a spectrophotometer. Good luck!

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4924129/

https://www.sciencedirect.com/science/article/pii/S0961953403001272?casa_token=CbbcnNlbkyYAAAAA:9vrUgiUCybA3HINtSuhZ0aS7sTlLgYLSpTlF0lz0sOljKxHI6l7j1RUYehvvvBehWcW2MMgdvxs