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Biblioteca(s): |
Epagri-Sede. |
Data corrente: |
26/01/2005 |
Data da última atualização: |
26/01/2005 |
Autoria: |
GASQUES, J. G.; BASTOS, E. T.; BACCHI, M. P. R.; CONCEICAO, J. C. P. R. da. |
Título: |
Condicionantes da produtividade da agropecuaria brasilleira. |
Ano de publicação: |
2004 |
Fonte/Imprenta: |
Revista de Politica Agricola, Brasilia, v. 13, n. 3, p. 73-90, jul./set. 2004. |
Idioma: |
Português |
Palavras-Chave: |
Agricultura; Brasil; Produtividade total dos fatores. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00551naa a2200181 a 4500 001 1013939 005 2005-01-26 008 2004 bl uuuu u00u1 u #d 100 1 $aGASQUES, J. G. 245 $aCondicionantes da produtividade da agropecuaria brasilleira. 260 $c2004 653 $aAgricultura 653 $aBrasil 653 $aProdutividade total dos fatores 700 1 $aBASTOS, E. T. 700 1 $aBACCHI, M. P. R. 700 1 $aCONCEICAO, J. C. P. R. da. 773 $tRevista de Politica Agricola, Brasilia$gv. 13, n. 3, p. 73-90, jul./set. 2004.
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Biblioteca(s): |
Epagri-Sede. |
Data corrente: |
12/08/2020 |
Data da última atualização: |
12/08/2020 |
Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
Autoria: |
VENTURA, T. F. B.; BRUZINGA, C. P.; SANTOS, A. A.; SIMIONI, C.; HAYASHI, L. |
Título: |
Addition of carbon dioxide, followed by irradiance increase, as optimization strategy for the cultivation of the red seaweed Kappaphycus alvarezii. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Journal of Applied Phycology, Germany, p. 1-14, 2020. |
Idioma: |
Inglês |
Conteúdo: |
This work aimed to verify the effects of adding CO2 and irradiance to Kappaphycus alvarezii cultivation. Thalli were cultured in vitro for 2 weeks under low irradiance (50 μmol photons m−2 s −1) with the addition of CO2 according to the following concentrations: 142× 103 ppm (1CO2, 0.1 L min−1), 285 × 103 ppm (2CO2, 0.2 L min−1) and 428 × 103 ppm (3CO2, 0.3 L min−1),followed by culture under higher irradiance (200 μmol photons m−2 s−1) for 2 more weeks. Control had no CO2 addition. Afterwards, growth rate, chlorophyll a and carotenoid content were quantified. Samples were submitted to light microscopy and transmission electron microscopy. Growth rates of different treatments or control between experimental periods showed no significant differences, except for 2CO2 treatment at the end of each period. Kappaphycus alvarezii cultivated with CO2 addition showed cell wall thickening and increasing quantity of starch granules, chlorophyll a and carotenoids compared with control. Exposed to high irradiance, control samples showed signs of stress, such as changes in chloroplast, starch granules quantity decrease and total chlorophyll a and carotenoids increase. Samples cultivated with CO2 showed an increase in the quantity and size of the starch granules and an increase in the number of organelles (mitochondria) related to energy generation and cell construction (Golgi complex). Such alterations suggest cellular response after CO2 addition, such as the formation of starch reserves and cell wall thickening, which could make plants more tolerant to environmental stress during transport from indoor condition to sea farms. MenosThis work aimed to verify the effects of adding CO2 and irradiance to Kappaphycus alvarezii cultivation. Thalli were cultured in vitro for 2 weeks under low irradiance (50 μmol photons m−2 s −1) with the addition of CO2 according to the following concentrations: 142× 103 ppm (1CO2, 0.1 L min−1), 285 × 103 ppm (2CO2, 0.2 L min−1) and 428 × 103 ppm (3CO2, 0.3 L min−1),followed by culture under higher irradiance (200 μmol photons m−2 s−1) for 2 more weeks. Control had no CO2 addition. Afterwards, growth rate, chlorophyll a and carotenoid content were quantified. Samples were submitted to light microscopy and transmission electron microscopy. Growth rates of different treatments or control between experimental periods showed no significant differences, except for 2CO2 treatment at the end of each period. Kappaphycus alvarezii cultivated with CO2 addition showed cell wall thickening and increasing quantity of starch granules, chlorophyll a and carotenoids compared with control. Exposed to high irradiance, control samples showed signs of stress, such as changes in chloroplast, starch granules quantity decrease and total chlorophyll a and carotenoids increase. Samples cultivated with CO2 showed an increase in the quantity and size of the starch granules and an increase in the number of organelles (mitochondria) related to energy generation and cell construction (Golgi complex). Such alterations suggest cellular response after CO2 ... Mostrar Tudo |
Palavras-Chave: |
Aquaculture; Electron microscopy. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02326naa a2200193 a 4500 001 1129832 005 2020-08-12 008 2020 bl uuuu u00u1 u #d 100 1 $aVENTURA, T. F. B. 245 $aAddition of carbon dioxide, followed by irradiance increase, as optimization strategy for the cultivation of the red seaweed Kappaphycus alvarezii.$h[electronic resource] 260 $c2020 520 $aThis work aimed to verify the effects of adding CO2 and irradiance to Kappaphycus alvarezii cultivation. Thalli were cultured in vitro for 2 weeks under low irradiance (50 μmol photons m−2 s −1) with the addition of CO2 according to the following concentrations: 142× 103 ppm (1CO2, 0.1 L min−1), 285 × 103 ppm (2CO2, 0.2 L min−1) and 428 × 103 ppm (3CO2, 0.3 L min−1),followed by culture under higher irradiance (200 μmol photons m−2 s−1) for 2 more weeks. Control had no CO2 addition. Afterwards, growth rate, chlorophyll a and carotenoid content were quantified. Samples were submitted to light microscopy and transmission electron microscopy. Growth rates of different treatments or control between experimental periods showed no significant differences, except for 2CO2 treatment at the end of each period. Kappaphycus alvarezii cultivated with CO2 addition showed cell wall thickening and increasing quantity of starch granules, chlorophyll a and carotenoids compared with control. Exposed to high irradiance, control samples showed signs of stress, such as changes in chloroplast, starch granules quantity decrease and total chlorophyll a and carotenoids increase. Samples cultivated with CO2 showed an increase in the quantity and size of the starch granules and an increase in the number of organelles (mitochondria) related to energy generation and cell construction (Golgi complex). Such alterations suggest cellular response after CO2 addition, such as the formation of starch reserves and cell wall thickening, which could make plants more tolerant to environmental stress during transport from indoor condition to sea farms. 653 $aAquaculture 653 $aElectron microscopy 700 1 $aBRUZINGA, C. P. 700 1 $aSANTOS, A. A. 700 1 $aSIMIONI, C. 700 1 $aHAYASHI, L. 773 $tJournal of Applied Phycology, Germany, p. 1-14, 2020.
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