Data/hora: 23/09/2024 03:00:50

Biblioteca(s): 	Embrapa Amazônia Ocidental.	
Data corrente: 	09/01/2024	
Data da última atualização: 	19/01/2024	
Autoria: 	OLIVEIRA, A. L. L. de; MUNIZ, M. P.; SILVA, F. M. A. da; NASCIMENTO, A. H. dos; SANTOS-BARNETT, T. C. dos; GOMES, F. B.; NUNOMURA, S. M.; KRUG, C.	
Afiliação: 	ANA LIGIA LEANDRINI DE OLIVEIRA, UNIVERSIDADE FEDERAL DO AMAZONAS; MAGNO PEREA MUNIZ, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA; FELIPE MOURA ARAÚJO DA SILVA, UNIVERSIDADE FEDERAL DO AMAZONAS; ALEXANDRO HOLANDA DO NASCIMENTO, UNIVERSIDADE FEDERAL DO AMAZONAS; TEREZA CRISTINA DOS SANTOS-BARNETT, UNIVERSIDADE FEDERAL DO AMAZONAS; FLAVIA BATISTA GOMES, CPAA; SERGIO MASSAYOSHI NUNOMURA, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA; CRISTIANE KRUG, CPAA.	
Título: 	Chemical composition of guarana flowers and nectar and their ecological significance.	
Ano de publicação: 	2024	
Fonte/Imprenta: 	Biochemical Systematics and Ecology, v. 112, art. 104769, 2024.	
DOI: 	https://doi.org/10.1016/j.bse.2023.104769	
Idioma: 	Inglês	
Conteúdo: 	The plant species Paullinia cupana Kunth (Sapindaceae), commonly known as guarana, originates from the central Amazonian Basin and has a long history of local use for its stimulant properties. It is currently commercialized worldwide for its health beneficial properties. The seeds chemical composition has been extensively studied over the years. However, the chemistry of guarana flowers, particularly the nectar content, have been barely investigated. From an ecological perspective, floral nectar and pollen are the primary food rewards for pollinators. In the present study, we investigated the chemical composition of nectar and whole pistillate, and staminate guarana flowers harvested separately. Although guarana is well known for its high concentration of caffeine in its seeds, to the best of our knowledge, this is the first report of caffeine and other methylxanthines as the main constituents of the nectar. The significant difference between guarana floral chemistry, which is more diverse and complex, and nectar chemical profile, which primarily contains methylxanthines, suggests that the presence of these compounds in guarana nectar may have an impact on plant-pollinator interactions, which can affect the fitness of both plants and flower visitors.	
Palavras-Chave: 	Methylxanthines; Phytochemistry.	
Thesagro: 	Paullinia Cupana.	
Thesaurus Nal: 	Caffeine; Pollination.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Amazônia Ocidental (CPAA)	
Exemplares: 	CPAA - (39154-1) - UPC - AP - DD -  -  -  - DIS