1. Repositório Institucional - Universidade Federal de Uberlândia
2. Instituto de Biologia (INBIO)
3. TCC - Ciências Biológicas (Uberlândia)

ORCID:	http://orcid.org/0009-0007-0195-2969
Document type:	Trabalho de Conclusão de Curso
Access type:	Acesso Aberto
Title:	Investigating the reproductive function of floral morphs in a distylous hummingbird-pollinated plant
Alternate title (s):	Investigando a função reprodutiva dos morfos florais em uma planta distílica polinizada por beija-flores
Author:	Andersson, Julia Simões Oliveira, Paulo Eugênio
First Advisor:	Brito, Vinícius Lourenço Garcia
First coorientator:	Trevizan, Renata
First member of the Committee:	Trevizan, Renata
Second member of the Committee:	Varassin, Isabela
Third member of the Committee:	Pacheco, Amanda
Summary:	• Floral display plays an essential role in reproduction by enhancing female or male performance in flowers. The distylous Psychotria poeppigiana (Rubiaceae) has brightly red bracts that act as honest signals of floral resources to pollinators, with larger bracts having greater nectar availability but higher mortality, while smaller bracts produce more fruits. This raises whether the S-styled morph, characterized by larger bracts, may predominantly benefit male function, whereas the L-styled, with smaller bracts, favors female function. • We evaluated morphological trait differences between L- and S-styled morphs, including bract size and floral traits (length, diameter, and number of flowers per bract). We then tested whether bract size influences bract mortality. We also evaluated the effect of bract size on male and female pollination performance by analyzing pollen remaining in anthers (as a proxy for pollen removal) and pollen deposition on stigmas, and assessing female reproductive success through fruit set and seed viability. • The S-styled presented larger bracts (10.1%), and longer flowers (18.3%) than L-styled morph. Bract size did not affect pollen deposition; however, L-styled morph received about 3.3 times more pollen than S-styled. Bract size showed negative relationships with fruit set and fruit size, and a positive relationship with bract mortality. Seed traits were not influenced by bract size or morph type. • Despite morphological differences, no marked differences in reproductive function were detected. Larger bracts may require resource costs that limit reproductive success, whereas smaller bracts may allow more efficient allocation to fruit production, increasing fruit set.
Keywords:	Distyly Floral display Pollination Reproductive biology Reproductive function Reproductive systems
Area (s) of CNPq:	CNPQ::CIENCIAS BIOLOGICAS::BOTANICA CNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA
Language:	eng
Country:	Brasil
Publisher:	Universidade Federal de Uberlândia
Quote:	ANDERSSON, Julia Simões; OLIVEIRA, Paulo Eugênio. Investigating the reproductive function of floral morphs in a distylous hummingbird-pollinated plant. 2026. 23 f. Trabalho de Conclusão de Curso (Graduação em Ciências Biológicas) - Universidade Federal de Uberlândia, Uberlândia, 2026.
URI:	https://repositorio.ufu.br/handle/123456789/49775
Date of defense:	13-Mar-2026
Appears in Collections:	TCC - Ciências Biológicas (Uberlândia)

This item is licensed under a Creative Commons License