Data/hora: 21/06/2024 14:21:34

Biblioteca(s): 	Embrapa Meio Ambiente.	
Data corrente: 	15/02/2019	
Data da última atualização: 	19/02/2019	
Autoria: 	RAKOCEVIC, M.; RIBEIRO, R. V.; MARCHIORI, P. E. R.; FILIZOLA, H. F.; BATISTA, E. R.	
Afiliação: 	MIROSLAVA RAKOCEVIC; RAFAEL VASCONCELOS RIBEIRO, IB-UNICAMP; PAULO EDUARDO RIBEIRO MARCHIORI, UFLA; HELOISA FERREIRA FILIZOLA, CNPMA; EUNICE REIS BATISTA, CNPMA.	
Título: 	Structural and functional changes in coffee trees after 4 years under free air CO2 enrichment.	
Ano de publicação: 	2018	
Fonte/Imprenta: 	Annals of Botany, v. 121, n. 5, p. 1065-1078, 2018.	
DOI: 	https://doi.org/10.1093/aob/mcy011	
Idioma: 	Inglês	
Conteúdo: 	Background and Aims: Climate forecasts suggest that [CO2] in the atmosphere will continue to increase. Structural and ecophysiological responses to elevated air [CO2] (e[CO2]) in tree species are contradictory due to species-dependent responses and relatively short-term experiments. It was hypothesized that long-term exposure (4 year) to e[CO2] would change canopy structure and function of Coffea arabica trees. Methods: Coffee plants were grown in a FACE (free air CO2 enrichment) facility under two air [CO2]: actual and elevated (actual + approx. 200 ?L CO2 L-1). Plants were codified following the VPlants methodology to obtain coffee mock-ups. Plant canopies were separated into three 50 cm thick layers over a vertical profile to evaluate their structure and photosynthesis, using functional-structural plant modelling. Key Results: Leaf area was strongly reduced on the bottom and upper canopy layers, and increased soil carbon concentration suggested changes in carbon partitioning of coffee trees under e[CO2]. Increased air [CO2] stimulated stomatal conductance and leaf photosynthesis at the middle and upper canopy layers, increasing water-use efficiency. Under e[CO2], plants showed reduced diameter of the second-order axes and higher investment in the youngest third to fifth-order axes. Conclusions: The responses of Arabica coffee grown under long-term exposure to e[CO2] integrated structural and functional modifications, which balanced leaf area loss through improvements in leaf and whole-plant photosynthesis.	
Thesagro: 	Área Foliar; Café; Dióxido de Carbono.	
Thesaurus Nal: 	Carbon dioxide enrichment; Climate change; Coffea; Leaf area; Plant architecture; Stomatal conductance; Transpiration.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (16381-1) - UPC - AP - DD -  -  -  - DIS