Phytomelanin
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Phytomelanin (phytomelan) is a black, inert, organic material that forms a crust-like covering of some seeds, commonly found in
Orchidaceae). It is mechanically hard and forms a resistant substance, although it is more pliable in the developing fruit, hardening later. Chemically it appears to be a polyvinyl aromatic alcohol, and is thought to be exuded from the hypodermis. It appears to provide resistance to insect predators and desiccation.[1][2][3]
References
Bibliography
- Pandey, Arun K.; Wilcox, Lee W.; Sack, Fred D.; Stuessy, Tod F. (May 1989). "Development of the Phytomelanin Layer in Fruits of Ageratum conyzoides (Compositae)". JSTOR 2444420.
- Pandey, AK; Dhakal, MR (25 April 2001). "Phytomelanin in Compositae" (PDF). Current Science. 80 (8): 933–940.
- Pandey, Arun K.; Stuessy, Tod F.; Mathur, Roshni R. (1 April 2014). "Phytomelanin and Systematics of the Heliantheae Alliance (Compositae)". Plant Diversity and Evolution. 131 (3): 145–165. .
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