Data/hora: 03/06/2024 06:18:46

Provedor de dados: 	Pesquisa Agropecuária Brasileira	
País: 	Brazil	
Título: 	Sensitivity of yellow passion fruit to ultraviolet-B radiation	
Autores: 	Cechin,Inês; Rocha,Valéria de Jesus; Fumis,Terezinha de Fátima.	
Data: 	2012-10-01	
Ano: 	2012	
Palavras-chave: 	Passiflora edulis; Anthocyanins; Growth; Phenolic compounds; Photosynthesis.	
Resumo: 	The objective of this work was to evaluate the effects of UV-B radiation on the vegetative growth and on the gas exchange characteristics of passion fruit plants (Passiflora edulis) grown in greenhouse. The average unweighted UV-B radiation near the apex of the plants was 8 W m-2 for the UV-B treatment (high UV-B), and 0.8 W m-2 for the control plants (low UV-B). Plants were irradiated with UV-B for 7 hours per day, centered on solar noon, during 16 days. High UV-B radiation resulted in lower shoot dry matter accumulation per plant. The content of UV-B absorbing compounds and anthocyanins was increased in the plants exposed to high UV-B radiation, when compared with the control. UV-B radiation did not affect stomatal conductance or transpiration rate, but reduced photosynthesis and instantaneous water-use efficiency, and increased intercellular CO2 concentration. The accumulation of UV-B-absorbing compounds and anthocyanins did not effectively shield plants from supplementary UV-B radiation, since the growth and photosynthetic processes were significantly reduced.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001000002	
Editor: 	Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira	
Relação: 	10.1590/S0100-204X2012001000002	
Formato: 	text/html	
Fonte: 	Pesquisa Agropecuária Brasileira  v.47 n.10 2012	
Fonte: 	info:eu-repo/semantics/openAccess