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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
29/09/2009 |
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Data da última atualização: |
29/09/2009 |
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Autoria: |
FALQUETO, A. R.; CASSOL, D.; MAGALHÃES JÚNIOR, A. M. de; OLIVEIRA, A. C. de; BACARIN, M. A. |
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Título: |
Physiological analysis of leaf senescence of two rice cultivars with different yield potential. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasília, v. 44, n. 7, p. 695-700, jul. 2009. |
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Idioma: |
Inglês |
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Conteúdo: |
O objetivo deste trabalho foi avaliar as mudanças fisiológicas que ocorrem em diferentes folhas durante o início e o final do estádio de enchimento de grãos em dois genótipos de arroz (Oryza sativa subsp. indica cultivar BRS Pelota e O. sativa subsp. japonica cultivar BRS Firmeza) que apresentam diferenças no potencial de produção de grãos. As plantas foram cultivadas em casa de vegetação. Os teores de pigmentos, a fluorescência da clorofila e a taxa de liberação de oxigênio foram determinados no estádio de enchimento de grão da primeira à quarta folha (do topo à base). O teor de pigmentos, a eficiência fotoquímica do fotossistema II e o transporte de elétrons decresceram significativamente de acordo com a posição das folhas na cultivar BRS Pelota. A cultivar BRS Firmeza apresentou maior teor de pigmentos e maior atividade do aparato fotossintético em comparação à 'BRS Pelota' durante o estádio de enchimento de grão. |
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Palavras-Chave: |
Análise fisiológica; Arroz; Eficiência fotoquímica; Extinção fotoquímica; Fotossistema; Oryza sativa; Potencial de produtividade; Senescência foliar; Senescência retardada; Taxa de evolução de oxigênio. |
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Categoria do assunto: |
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Marc: |
LEADER 01865naa a2200289 a 4500
001 1066576
005 2009-09-29
008 2009 bl uuuu u00u1 u #d
100 1 $aFALQUETO, A. R.
245 $aPhysiological analysis of leaf senescence of two rice cultivars with different yield potential.
260 $c2009
520 $aO objetivo deste trabalho foi avaliar as mudanças fisiológicas que ocorrem em diferentes folhas durante o início e o final do estádio de enchimento de grãos em dois genótipos de arroz (Oryza sativa subsp. indica cultivar BRS Pelota e O. sativa subsp. japonica cultivar BRS Firmeza) que apresentam diferenças no potencial de produção de grãos. As plantas foram cultivadas em casa de vegetação. Os teores de pigmentos, a fluorescência da clorofila e a taxa de liberação de oxigênio foram determinados no estádio de enchimento de grão da primeira à quarta folha (do topo à base). O teor de pigmentos, a eficiência fotoquímica do fotossistema II e o transporte de elétrons decresceram significativamente de acordo com a posição das folhas na cultivar BRS Pelota. A cultivar BRS Firmeza apresentou maior teor de pigmentos e maior atividade do aparato fotossintético em comparação à 'BRS Pelota' durante o estádio de enchimento de grão.
653 $aAnálise fisiológica
653 $aArroz
653 $aEficiência fotoquímica
653 $aExtinção fotoquímica
653 $aFotossistema
653 $aOryza sativa
653 $aPotencial de produtividade
653 $aSenescência foliar
653 $aSenescência retardada
653 $aTaxa de evolução de oxigênio
700 1 $aCASSOL, D.
700 1 $aMAGALHÃES JÚNIOR, A. M. de
700 1 $aOLIVEIRA, A. C. de
700 1 $aBACARIN, M. A.
773 $tPesquisa Agropecuaria Brasileira, Brasília$gv. 44, n. 7, p. 695-700, jul. 2009.
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
14/10/2022 |
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Data da última atualização: |
14/10/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NASCIMENTO, V. S.; LAPA, K. R.; GOMES, C. H. A. M.; GRAY, M.; SILVA, G.; GARBOSSA, L. H. P.; SUPLICY, F. M.; MELO, C. M. R. |
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Título: |
Filtration and biodeposition rates of Crassostrea oysters for southern Brazilian waters. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Regional Studies in Marine Science, United Kingdom, v. 56, 2022. |
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Idioma: |
Inglês |
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Conteúdo: |
Shellfish are considered to be one of the most sustainable sources of animal protein that also contribute substantial ecosystem services back into the environment in which they are grown. Although filtration and biodeposition services of bivalves have been explored in many parts of the world, less information is available about bivalve-environmental interactions in Southwest Atlantic. In this study, clearance, filtration and biodeposition rates for oysters Crassostrea gigas, Crassostrea gasar, and Crassostrea rhizophorae were evaluated in the bays of the island of Florianópolis, Brazil. The data were taken from the end of summer of 2019 until the middle of spring of 2019 in two sites. Temperature, salinity, chlorophyll, seston organic content (OCS), total particulate matter (TPM) and organic particulate material (POM) of seawater were determined and the clearance, filtration and biodeposition rates data were collected. C. rhizophorae showed greater average clearance (3.50 ± 0.21 L/h/g), filtration (66.03 ± 6.82 mg/h/g), and biodeposition rates (63.65 ± 6.62 mg/h/g), indicating that this species processes the greatest amount of water and suspended particles than other species (2.15 ± 0.12, 29.85 ± 2.48, 27.28 ± 2.36 and 1.81 ± 0.12, 29.14 ± 2.36 and 27.58 ± 2.42, respectively for C. gigas and C. gasar). The clearance rate of each species was similar between sites and seasons of the year. However, total particulate matter concentrations were significantly different between sites, with average values of 20.65 ± 7.63 and 15.09 ± 11.97 mg/L, respectively, for Baía Norte and Sul. Furthermore, clearance rate was correlated with animal weight, TPM and OCS while filtration and biodeposition rates were dependent on seston. MenosShellfish are considered to be one of the most sustainable sources of animal protein that also contribute substantial ecosystem services back into the environment in which they are grown. Although filtration and biodeposition services of bivalves have been explored in many parts of the world, less information is available about bivalve-environmental interactions in Southwest Atlantic. In this study, clearance, filtration and biodeposition rates for oysters Crassostrea gigas, Crassostrea gasar, and Crassostrea rhizophorae were evaluated in the bays of the island of Florianópolis, Brazil. The data were taken from the end of summer of 2019 until the middle of spring of 2019 in two sites. Temperature, salinity, chlorophyll, seston organic content (OCS), total particulate matter (TPM) and organic particulate material (POM) of seawater were determined and the clearance, filtration and biodeposition rates data were collected. C. rhizophorae showed greater average clearance (3.50 ± 0.21 L/h/g), filtration (66.03 ± 6.82 mg/h/g), and biodeposition rates (63.65 ± 6.62 mg/h/g), indicating that this species processes the greatest amount of water and suspended particles than other species (2.15 ± 0.12, 29.85 ± 2.48, 27.28 ± 2.36 and 1.81 ± 0.12, 29.14 ± 2.36 and 27.58 ± 2.42, respectively for C. gigas and C. gasar). The clearance rate of each species was similar between sites and seasons of the year. However, total particulate matter concentrations were significantly different between sit... Mostrar Tudo |
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Thesagro: |
clearance rates; mariculture; mollusks; seston; water quality. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02507naa a2200265 a 4500
001 1132593
005 2022-10-14
008 2022 bl uuuu u00u1 u #d
100 1 $aNASCIMENTO, V. S.
245 $aFiltration and biodeposition rates of Crassostrea oysters for southern Brazilian waters.$h[electronic resource]
260 $c2022
520 $aShellfish are considered to be one of the most sustainable sources of animal protein that also contribute substantial ecosystem services back into the environment in which they are grown. Although filtration and biodeposition services of bivalves have been explored in many parts of the world, less information is available about bivalve-environmental interactions in Southwest Atlantic. In this study, clearance, filtration and biodeposition rates for oysters Crassostrea gigas, Crassostrea gasar, and Crassostrea rhizophorae were evaluated in the bays of the island of Florianópolis, Brazil. The data were taken from the end of summer of 2019 until the middle of spring of 2019 in two sites. Temperature, salinity, chlorophyll, seston organic content (OCS), total particulate matter (TPM) and organic particulate material (POM) of seawater were determined and the clearance, filtration and biodeposition rates data were collected. C. rhizophorae showed greater average clearance (3.50 ± 0.21 L/h/g), filtration (66.03 ± 6.82 mg/h/g), and biodeposition rates (63.65 ± 6.62 mg/h/g), indicating that this species processes the greatest amount of water and suspended particles than other species (2.15 ± 0.12, 29.85 ± 2.48, 27.28 ± 2.36 and 1.81 ± 0.12, 29.14 ± 2.36 and 27.58 ± 2.42, respectively for C. gigas and C. gasar). The clearance rate of each species was similar between sites and seasons of the year. However, total particulate matter concentrations were significantly different between sites, with average values of 20.65 ± 7.63 and 15.09 ± 11.97 mg/L, respectively, for Baía Norte and Sul. Furthermore, clearance rate was correlated with animal weight, TPM and OCS while filtration and biodeposition rates were dependent on seston.
650 $aclearance rates
650 $amariculture
650 $amollusks
650 $aseston
650 $awater quality
700 1 $aLAPA, K. R.
700 1 $aGOMES, C. H. A. M.
700 1 $aGRAY, M.
700 1 $aSILVA, G.
700 1 $aGARBOSSA, L. H. P.
700 1 $aSUPLICY, F. M.
700 1 $aMELO, C. M. R.
773 $tRegional Studies in Marine Science, United Kingdom$gv. 56, 2022.
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