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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
30/03/2010 |
Data da última atualização: |
16/11/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
COSTA, M. A.; PINHEIRO, H. A.; SHIMIZU, E. S. C.; FONSECA, F. T.; SANTOS FILHO, B. G. dos; MORAES, F. K. C.; FIGUEIREDO, D. M. de. |
Afiliação: |
MARCELLE AUDAY COSTA, UFRA; HUGO ALVES PINHEIRO, UFRA; ELIZABETH SANTOS CORDEIRO SHIMIZU, CPATU; FELIPE TAMEIRÃO FONSECA, UFRA; BENEDITO GOMES DOS SANTOS FILHO, UFRA; FABRICIA KELLY CABRAL MORAES, UFRA; DIEGO MOREIRA DE FIGUEIREDO, UFRA. |
Título: |
Lipid peroxidation, chloroplastic pigments and antioxidant strategies in carapa guianensis (Aubl.) subjected to water-deficit and short-term rewetting. |
Ano de publicação: |
2010 |
Fonte/Imprenta: |
Trees, v. 24, n. 2, p. 275-283, Apr. 2010. |
DOI: |
10.1007/s00468-009-0397-x |
Idioma: |
Inglês |
Conteúdo: |
The effects of drought on membrane lipids and leaf pigments and the ability of andiroba (Carapa guianensis Aubl.) plants to attenuate oxidative damage through antioxidant enzymes or adjusting carotenoids and glycinebetaine (GB) were examined. Assessments were performed when pre-dawn leaf water potential (?pd) of water-stressed plants reached ?1.35 and ?3.21 MPa (15 and 27 days after withholding irrigation) and 12 h after resuming watering (short-term rewetting, day 28). Oxidative damages to lipids were evident on day 15, in which drought caused an increase of 47% in malondialdehyde (MDA) content. On day 27, MDA content did not differ between treatments. The activity of superoxide dismutase remained unchanged over experimental period, while significant increases in the ascorbate peroxidase (APX, 110%) and catalase (CAT, 50%) activities were observed only on day 27. GB content was 62% (day 15) and 112% (day 27) higher in water-stressed plants than in control. Regardless of ?pd, both chlorophyll (Chl) a, Chl b and total carotenoids remained unchanged between well-watered and water-stressed plants, indicating that drought did not result in degradation of leaflet pigments. On day 28, ?pd of water-stressed plants increased near to control plants and both activities of APX and CAT did not differ between treatments. Altogether, adjustments in APX and CAT activity and in the GB content were efficient strategies to prevent expressive oxidative damages in water-stressed andiroba plants. |
Palavras-Chave: |
Enzimas antioxidantes. |
Thesagro: |
Andiroba. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
Marc: |
LEADER 02256naa a2200229 a 4500 001 1662775 005 2022-11-16 008 2010 bl uuuu u00u1 u #d 024 7 $a10.1007/s00468-009-0397-x$2DOI 100 1 $aCOSTA, M. A. 245 $aLipid peroxidation, chloroplastic pigments and antioxidant strategies in carapa guianensis (Aubl.) subjected to water-deficit and short-term rewetting.$h[electronic resource] 260 $c2010 520 $aThe effects of drought on membrane lipids and leaf pigments and the ability of andiroba (Carapa guianensis Aubl.) plants to attenuate oxidative damage through antioxidant enzymes or adjusting carotenoids and glycinebetaine (GB) were examined. Assessments were performed when pre-dawn leaf water potential (?pd) of water-stressed plants reached ?1.35 and ?3.21 MPa (15 and 27 days after withholding irrigation) and 12 h after resuming watering (short-term rewetting, day 28). Oxidative damages to lipids were evident on day 15, in which drought caused an increase of 47% in malondialdehyde (MDA) content. On day 27, MDA content did not differ between treatments. The activity of superoxide dismutase remained unchanged over experimental period, while significant increases in the ascorbate peroxidase (APX, 110%) and catalase (CAT, 50%) activities were observed only on day 27. GB content was 62% (day 15) and 112% (day 27) higher in water-stressed plants than in control. Regardless of ?pd, both chlorophyll (Chl) a, Chl b and total carotenoids remained unchanged between well-watered and water-stressed plants, indicating that drought did not result in degradation of leaflet pigments. On day 28, ?pd of water-stressed plants increased near to control plants and both activities of APX and CAT did not differ between treatments. Altogether, adjustments in APX and CAT activity and in the GB content were efficient strategies to prevent expressive oxidative damages in water-stressed andiroba plants. 650 $aAndiroba 653 $aEnzimas antioxidantes 700 1 $aPINHEIRO, H. A. 700 1 $aSHIMIZU, E. S. C. 700 1 $aFONSECA, F. T. 700 1 $aSANTOS FILHO, B. G. dos 700 1 $aMORAES, F. K. C. 700 1 $aFIGUEIREDO, D. M. de 773 $tTrees$gv. 24, n. 2, p. 275-283, Apr. 2010.
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Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
02/03/2006 |
Data da última atualização: |
18/08/2009 |
Autoria: |
CRUVINEL, P. E.; ARMELIN, M. J. A. |
Título: |
Zinc measurements in agricultural field by means of electronics and nuclear instrumentation. |
Ano de publicação: |
1999 |
Fonte/Imprenta: |
In: MASTORAKIS, N. E. (Ed.). Advances in intelligent systems and computer science. [Athens]: World Scientific and Engineering Society Press, 1999. p. 216-222. |
Idioma: |
Inglês |
Conteúdo: |
Electronics and computers are rapidly advancing into agricultural systems management. Silicon and software now impact strongly production agriculture as well as industry in general. In the next few decades electronics and computer applications in agriculture will be as significant as were materials and fluids technologies in industrialized economies over the last ten years. |
Palavras-Chave: |
Agricultural Instrumentation; Heavy; INAA; Micronutrient; PIXE. |
Thesaurus NAL: |
soil analysis; zinc. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01076naa a2200217 a 4500 001 1029566 005 2009-08-18 008 1999 bl --- 0-- u #d 100 1 $aCRUVINEL, P. E. 245 $aZinc measurements in agricultural field by means of electronics and nuclear instrumentation. 260 $c1999 520 $aElectronics and computers are rapidly advancing into agricultural systems management. Silicon and software now impact strongly production agriculture as well as industry in general. In the next few decades electronics and computer applications in agriculture will be as significant as were materials and fluids technologies in industrialized economies over the last ten years. 650 $asoil analysis 650 $azinc 653 $aAgricultural Instrumentation 653 $aHeavy 653 $aINAA 653 $aMicronutrient 653 $aPIXE 700 1 $aARMELIN, M. J. A. 773 $tIn: MASTORAKIS, N. E. (Ed.). Advances in intelligent systems and computer science. [Athens]: World Scientific and Engineering Society Press, 1999. p. 216-222.
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