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Re: Red

> Could it be that anthocyanin is more important as "suncreen" under water
> because of some physical difference of the sumbersed and emersed leaves?

The literature doesn't not show a correlation between the presence and
intensity of light.
Why would cactus be green and tropical understory plants be red?

As Karen and I are trying to point out here, Why would Red needle leaf
ludwigia, L repens, Rotala's, Ammannia's etc, all be green above the water
where light is higher and red underwater? In both sunlight or in artificial
lighting? UV-A , UV-B can quickly be ruled out here.

The only thing antho's seem good for is anti fungal properties with leaf
cutter ants. 

The other stuff does not seem valid.

Tom Barr