Data/hora: 25/06/2024 13:20:17

Biblioteca(s): 	Embrapa Florestas; Embrapa Meio Ambiente.	
Data corrente: 	17/07/2023	
Data da última atualização: 	17/07/2023	
Autoria: 	RAKOCEVIC, M.; MAIA, A. de H. N.; LIZ, M. V. de; IMOSKI, R.; HELM, C. V.; CARDOZO JUNIOR, E. L.; WENDLING, I.	
Afiliação: 	MIROSLAVA RAKOCEVIC; ALINE DE HOLANDA NUNES MAIA, CNPMA; MARCUS VINICIUS DE LIZ, UNIVERSIDADE TECNOLÓGICA FEDERAL DO PARANÁ; RAFAELA IMOSKI, UNIVERSIDADE TECNOLÓGICA FEDERAL DO PARANÁ; CRISTIANE VIEIRA HELM, CNPF; EUCLIDES LARA CARDOZO JUNIOR, UNIVERSIDADE PARANAENSE.	
Título: 	Stability of leaf yerba mate (Ilex paraguariensis) metabolite concentrations over the time from the prism of secondary Sexual dimorphism.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Plants, v. 12, n. 11, article 2199, 2023.	
ISSN: 	2223-7747	
DOI: 	10.3390/plants12112199	
Idioma: 	Inglês	
Conteúdo: 	Abstract: The yerba mate leaf metabolic composition depends mainly on genetics, sex, plant and leaf age, light intensity, harvest time, climate, and fertilization. In yerba mate, the secondary sexual dimorphism (SSD), the leaf metabolic SSD association with the frequency of leaf harvests, and the stability of the metabolites in the two genders over the years is not known. It was hypothesized that (1) the SSD in the metabolite segregation would differ among the winter and summer growth pauses, (2) females would show lower metabolite concentrations, and (3) the metabolic concentrations would show stability over the years on the same plants, not obligatorily associated with the SSD stability expression. Variations in theobromine, caffeine, chlorogenic and caffeic acids were correlated to the increasing time since the previous harvest, especially in females. However, the frequency of the metabolic SSD were associated with the studied growth pauses, rejecting the first hypothesis. No regular gender superiority was expressed in the yerba mate leaf secondary metabolites, rejecting our second hypothesis, even though more cases of superior female metabolite accumulation were identified. The stability of the leaf protein was preserved over the four years, with no SSD cases observed. The leaf methylxanthines were time stable, while the decrease in the phenolic content occurred with tree aging, which was not associated with the SSD expression, partially proving our third hypothesis. The novelty was related to the time stability of the leaf metabolic SSD observed over the winter and summer growth pauses, and over the four consecutive years without a regular expression of the male- or female-biased concentrations in the studied metabolites. To demystify the random metabolic gender responses in yerba mate, gender-orientated experiments with a high number of tree repetitions must be conducted, including clonal plants grown in various environments, such as monoculture and agroforestry, or on plantations in different climates and altitudes.	
Thesagro: 	Cafeína; Fenol; Mate; Teobromina.	
Thesaurus Nal: 	Caffeic acid; Caffeine; Chlorogenic acid; Plant proteins; Theobromine; Yerba mate.	
Categoria do assunto: 	S Ciências Biológicas	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1154965/1/Maia-Stability-leaf-2023.pdf	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (17416-1) - UPC - AP - DD -  -  -  - DIS
CNPF - (58626-1) - UPC - AP - DD -  -  -  - DIS