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| Oliveira,Jurandi Gonçalves de; Bressan-Smith,Ricardo Enrique; Campostrini,Eliemar; Cunha,Maura Da; Costa,Ernani Santos; Torres Netto,Alena; Coutinho,Kelly da Silva; SILVA,Marcelo Gomes da; Vitória,Angela Pierre. |
| Gelled aspect in papaya fruit is typically confused with premature ripening. This research reports the characterization of this physiological disorder in the pulp of papaya fruit by measuring electrolyte leakage, Pi content, lipid peroxidation, pulp firmness, mineral contents (Ca, Mg and K - in pulp and seed tissues), and histological analysis of pulp tissue. The results showed that the gelled aspect of the papaya fruit pulp is not associated with tissue premature ripening. Data indicate a reduction of the vacuole water intake as the principal cause of the loss of cellular turgor; while the waterlogged aspect of the tissue may be due to water accumulation in the apoplast. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ultrastructural alterations; Cell turgor; Fruit quality; Physiological disturbances; Biochemical alterations. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452010000400003 |
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| Vitória,Angela Pierre; Lage-Pinto,Frederico; Silva,Leonardo Bernardo Campaneli da; Cunha,Maura da; Oliveira,Jurandi Gonçalves de; Rezende,Carlos Eduardo; Souza,Cristina Maria Magalhães de; Azevedo,Ricardo Antunes. |
| In this work, the structural and ecophysiological alterations (chlorophyll a fluorescence and photosynthetic pigments), and quantification of Cr, Pb and Zn in the leaf limb, petiole and younger and older roots of water hyacinth from the lower, medium and upper Paraíba do Sul river (PSR) and Imbé river were evaluated. The plants from the medium and upper PSR (more industrialized and populated regions) exhibited lower turgid cell in the root cortex, less root hairs and leaf epidermis, chloroplasts with plastoglobules and increased stroma volume. Higher concentrations of metals were observed in the younger and older roots from the medium PSR plants. The results suggested that the plants from more anthropized regions were able to maintain the maximum quantum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorophyll a fluorescence; Photosynthetic pigments; Energy dissipation; Morphological alterations; Metal evaluate. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000500025 |
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| Lage-Pinto,Frederico; Bernini,Elaine; Oliveira,Jurandi Gonçalves de; Vitória,Angela Pierre. |
| Gas exchange, chlorophyll afluorescence, and photosynthetic pigments of Xylopia sericeaA. St.-Hil. and Siparuna guianensis Aubl. were evaluated during the rainy season and the dry season (2009-2010) in three understories with different ecological conditions (irradiance, water availability, and temperature) located in the União Biological Reserve (known as REBIO União), at Rio de Janeiro State, a natural forest understory, eucalyptus understory under regeneration, and understory of eucalyptus plantation with 18-year-old trees that were removed 1 year before. The lowest values of Fv/Fm e Fm/Fo were observed in the exposed understory for both seasons, with lower values in the dry season, suggesting that reduced water availability potentializes the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corymbia citriodora; Dehydration; Photoinhibition; Siparuna guianensis; Xylopia sericea. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000200003 |
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