This report describes using Drosophila to test of the potential antioxidant properties of a plant extract.
Girish C, Muralidhara. Propensity of Selaginella delicatula aqueous extract to offset rotenone-induced oxidative dysfunctions and neurotoxicity in Drosophila melanogaster: Implications for Parkinson's disease. Neurotoxicology. 2012 Jun;33(3):444-56. PubMed PMID: 22521218.
As of this posting, the number of PubMed cataloged papers on Selaginella delicatula is small. It's a pteridophyte. Some previous posts point to papers looking at the effects of fruit extracts, methylene blue and L-ascorbic acid on fly neurodegeneration models.