Banca de DEFESA: MARÍLIA FERNANDES ERICKSON

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : MARÍLIA FERNANDES ERICKSON
DATA : 27/05/2019
HORA: 09:00
LOCAL: Sala do Pop-RN - Centro de Convivência - UFRN
TÍTULO:

Floral Syndromes through pollinators eyes

PALAVRAS-CHAVES:

Floral syndromes; Color vision; Flower color

PÁGINAS: 75
GRANDE ÁREA: Ciências Humanas
ÁREA: Psicologia
RESUMO:

Flower coloration is as beautiful and intriguing as the ecological and environmental factors behind them. Since the beginning of studies in floral biology, the question of the reasons behind floral coloration has been asked. Many authors have attributed flower colors to sexual selection and pollinator pressure. This is well exemplified by the idea of pollination syndromes: flowers with certain similar characteristics, such as color, are visited by similar groups of pollinators. Such a diverse array of coloration, however, is hardly ever explained by one factor alone. In this study, we aimed at understanding which environmental, ecological and physiological pressures are behind flower coloration, emphasizing, in testing, if flowers predicted by pollination syndromes are in fact conspicuous to their pollinators. We used Apis mellifera (honeybee), Drosophila melanogaster (housefly), Heliconius erato (butterfly) and Sephanoides sephanoides (hummingbird) as models to study how different pollinators see flowers. Flowers were more conspicuous to tetrachromat (housefly, female butterfly and hummingbird) than to trichromat (honeybee and male butterfly) pollinators. Coloration of Flowers is obtained mainly by pigments, that beyond the function of attracting pollinators have a role as chemical defense against herbivore and protection against solar radiation, among other things. Furthermore, plants are competing for pollinators, which might lead to divergence or convergence of floral color, depending on the environment. Even only taking pollination pressure into account, many animals have innate preferences for certain colors, and can easily learn how to associate color and rewards, which matters directly during foraging. Probably the interaction of all these factors have shaped the coloration of flowers across time, and pollination syndromes are a piece of the whole picture.

MEMBROS DA BANCA:
Presidente - 1476621 - DANIEL MARQUES DE ALMEIDA PESSOA
Externo à Instituição - FELIPE MALHEIROS GAWRYSZEWSKI - UnB
Externo ao Programa - 1755074 - LEONARDO DE MELO VERSIEUX