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| Machado,Daniela Favero São Pedro; Lagôa,Ana Maria Magalhães Andrade; Ribeiro,Rafael Vasconcelos; Marchiori,Paulo Eduardo Ribeiro; Machado,Ricardo Silvério; Machado,Eduardo Caruso. |
| O objetivo deste trabalho foi avaliar as respostas fotossintéticas da cana‑de‑açúcar aos efeitos simultâneos e isolados de baixa temperatura noturna (TN) e deficiência hídrica (DH). Após 128 dias do plantio, as plantas da cultivar IACSP94-2094 foram submetidas aos tratamentos: controle, sem DH e com TN de 20°C (TN20); com DH e TN de 20°C (DH/TN20); sem DH e com TN de 12°C (TN12); e com DH e TN de 12°C (DH/TN12) por cinco dias. Após o período de tratamento, as plantas foram irrigadas e submetidas à TN de 20°C por mais quatro dias, para recuperação. Houve decréscimos na assimilação de CO2 em todos os tratamentos. A recuperação total da assimilação de CO2 foi observada apenas nas plantas do tratamento TN12. A ocorrência simultânea da baixa temperatura noturna... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum; Assimilação de CO2; PEPcase; Resfriamento; Rubisco. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000500004 |
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| Aragão,Maria Erivalda Farias de; Guedes,Marjorie Moreira; Otoch,Maria de Lourdes Oliveira; Guedes,Maria Izabel Florindo; Melo,Dirce Fernandes de; Lima,Maria da Guia Silva. |
| Vita 3 and Vita 5 are two Vigna unguiculata cultivars that differ in their capacities for survival in saline environments; Vita 3 is more tolerant and Vita 5 more sensitive. Both cultivars were submitted to salt stress with 0.1 M NaCl. After 8 days, root and shoot growth from both cultivars was reduced but reduction was more pronounced in Vita 5. Furthermore, leaf area was also reduced in this cultivar. Chlorophyll content and chlorophyll fluorescence parameters were not affected by salt stress, but the specific activities of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) decreased in Vita 3 and increased in Vita 5. The use of immunological techniques also revealed that the Rubisco content from Vita 3 decreased while that of Vita 5 increased.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rubisco; Photosynthesis; Salt stress; Vigna unguiculata. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000200003 |
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| Garg,Neera; Singla,Ranju. |
| Four cultivars of chickpea, two of them of Mediterranean origin (kabuli), CSG 9651, BG 267 and two Indian (desi) types, CSG 8962, DCP 92-3, differing in their salt sensitivities were identified after screening ten genotypes in saline soils. The cultivars CSG 9651 and CSG 8962 were salt tolerant while BG 267 and DCP 92-3 were salt sensitive, respectively. The seeds of different cultivars were inoculated with Mesorhizobium ciceri, strain F: 75 and the plants were grown in the greenhouse. After the establishment of symbiosis, 15-day-old seedlings were administered doses of saline at varying concentrations (0, 4, 6, 8 dSm-1 NaCl, Na2SO4, CaCl2). Plants were harvested at 40, 70 and 100 days after sowing, for analyses. The main aim was to compare the relative... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorophyll pigments; Nitrogenase activity; Nodule; PEPCase; Rubisco. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000300003 |
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| Partelli,Fábio Luiz; Vieira,Henrique Duarte; Viana,Alexandre Pio; Batista-Santos,Paula; Rodrigues,Ana Paula; Leitão,António Eduardo; Ramalho,José Cochicho. |
| The objective of this work was to evaluate photoprotective mechanisms related to low positive temperatures in Coffea canephora (Conilon clones 02 and 153) and C. arabica ('Catucaí' IPR 102) genotypes, involved in cold temperature tolerance. To accomplish this, one-year-old plants were successively submitted to: temperature decrease of 0.5ºC day-1, from 25/20ºC to 13/8ºC; a three-day chilling cycle at 13/4ºC; and a recovery period of 14 days (25/20ºC). During the experiment, leaf gas exchange, chlorophyll a fluorescence and leaf photosynthetic pigment content were evaluated. Total activity of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and ribulose-5-phosphate kinase (Ru5PK) were quantified to measure the activity of photosynthesis key... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea; Carotenoids; Photoprotection; Photosynthesis; Rubisco. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001100006 |
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| Zárate Castrejón, José Luis. |
| La senescencia foliar es la última etapa del desarrollo de la hoja, se caracteriza por una serie de cambios fisiológicos, bioquímicos y estructurales. Las hojas pierden gradualmente clorofila, se desorganiza la maquinaria fotosintética y se reciclan los productos de degradación de las macromoléculas hacia otras partes en crecimiento (hojas jóvenes, flores, frutos) u órganos de almacenamiento como el tubérculo en Solanum tuberosum. Se conoce poco acerca de la relación entre la senescencia foliar y proceso del llenado del tubérculo. El objetivo del presente trabajo fue estudiar la senescencia foliar en dos variedades de papa con diferente ciclo biológico y relacionarlo con el llenado del tubérculo. Se monitoreó el amarillamiento foliar en toda la planta a... |
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Palavras-chave: ADN; Cloroplastos; LSU; Rubisco; SDS-PAGE; Cloroplast; DNA; Maestría; Botánica. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/275 |
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