biostudies-literatureUnknown27(6)Trevizan RFire influences plant traits in several ways, but its effects on flower polymorphisms are unknown. Distyly, a floral polymorphism with long-styled (L-styled) and short-styled (S-styled) morphs exhibiting reciprocal herkogamy and a self-incompatibility system, depends on biotic pollination for intermorph pollination and reproduction. We investigated the effects of fire on the functioning of distyly, assessing morphology, floral reward, between-morph reciprocity, and reproductive success. We studied a population of the distylous hummingbird-pollinated Palicourea rigida (Rubiaceae) in the Brazilian savanna by comparing individuals from a fire-affected area with those from a contiguous unaffected area. Fire affected some floral traits, reducing the number of inflorescences (9.4%), corollas (4.Plant biology (Stuttgart, Germany)1035-1046https://www.ebi.ac.uk/biostudies/studies/S-EPMC12477302biostudies-literatureInvestigating the effects of fire on pollinator-dependent distyly polymorphism.PMC12477302Cardoso JCFTrevizan RMendes-Rodrigues COliveira PEAmorim FWMaruyama PKfalseInvestigating the effects of fire on pollinator-dependent distyly polymorphism.Fire influences plant traits in several ways, but its effects on flower polymorphisms are unknown. Distyly, a floral polymorphism with long-styled (L-styled) and short-styled (S-styled) morphs exhibiting reciprocal herkogamy and a self-incompatibility system, depends on biotic pollination for intermorph pollination and reproduction. We investigated the effects of fire on the functioning of distyly, assessing morphology, floral reward, between-morph reciprocity, and reproductive success. We studied a population of the distylous hummingbird-pollinated Palicourea rigida (Rubiaceae) in the Brazilian savanna by comparing individuals from a fire-affected area with those from a contiguous unaffected area. Fire affected some floral traits, reducing the number of inflorescences (9.4%), corollas (4.2025-01-01T00:00:00Z2025 Oct2026-06-03T23:18:31.255Z2026-05-03T03:10:21.833ZS-EPMC124773024061624210.1111/plb.70062