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Feeding naringenin to tt4 restores flavonoid fluorescence to pollen. tt4 seedlings were watered three times weekly with 10 μM naringenin. Following pollen formation, flower tissue was analysed for flavonoid fluorescence using DPBA. The wild-type fluorescence is similar to that reported by Peer et al. (2001). Abbreviations: an, anther; st, stigma; po, pollen. Bar=100 μm.
