Data/hora: 19/06/2024 01:04:48

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 13/05/2013
Data da última atualização: | 01/09/2017
Autoria: | CECHIN, I.; ROCHA, V. DE J.; FUMIS, T. DE F.
Afiliação: | INÊS CECHIN, Universidade do Estado de São Paulo/Faculdade de Ciências/Departamento de Ciências Biológicas; VALÉRIA DE JESUS ROCHA, Universidade do Estado de São Paulo/Faculdade de Ciências/Departamento de Ciências Biológicas; TEREZINHA DE FÁTIMA FUMIS, Universidade do Estado de São Paulo/Faculdade de Ciências/Departamento de Ciências Biológicas.
Título: | Sensitivity of yellow passion fruit to ultraviolet-B radiation.
Ano de publicação: | 2012
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 47, n. 10, p. 1422-1427, out. 2012.
Idioma: | Inglês
Notas: | Título em português: Sensitividade do maracujazeiro?amarelo à radiação ultravioleta?B.
Conteúdo: | 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 m2 for the UV-B treatment (high UV-B), and 0.8 W m2 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.
Thesagro: | Crescimento; Maracujá; Passiflora Edulis; Radiação solar.
Thesaurus Nal: | Anthocyanins; Phenolic compounds; Photosynthesis.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/82695/1/sensitivity-of-yellow-passion-fruit.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (54490-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS