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| 42. |  | FIALHO, J. de F.; ANDRADE, R. F. R. de; VIEIRA, E. A. Mandioca no cerrado: questões práticas. Planaltina, DF: Embrapa Cerrados, 2009. 87 p. il. color. Autores: Alaide Silva Vieira Gomes, EMATER-DF; Andreia Gonçalves Cavalcante, EMATER-DF; Charles Martins de Oliveira, CPAC; Eduardo Alano Vieira, CPAC; Francisco Duarte Fernandes, CPAC; Josefino de Freitas Fialho, CPAC; Laercio de Julio,...| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 44. | | FIALHO, J. de F.; ANDRADE, R. F. R. DE; VIEIRA, E. A. (ed.). Mandioca no cerrado: questões práticas. Planaltina, DF: Embrapa Cerrados, 2009. 87 p. Autores: Alaide Silva Vieira Gomes, EMATER-DF; Andreia Gonçalves Cavalcante, EMATER-DF; Charles Martins de Oliveira, CPAC; Eduardo Alano Vieira, CPAC; Francisco Duarte Fernandes, CPAC; Josefino de Freitas Fialho, CPAC; Laercio de Julio,...| Biblioteca(s): Embrapa Agroindústria de Alimentos; Embrapa Agroindústria Tropical; Embrapa Agropecuária Oeste; Embrapa Algodão; Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Arroz e Feijão; Embrapa Cerrados; Embrapa Clima Temperado; Embrapa Gado de Corte; Embrapa Gado de Leite; Embrapa Hortaliças; Embrapa Meio-Norte; Embrapa Rondônia; Embrapa Roraima; Embrapa Semiárido; Embrapa Soja; Embrapa Solos; Embrapa Suínos e Aves; Embrapa Tabuleiros Costeiros; Embrapa Unidades Centrais. MenosEmbrapa Agroindústria de Alimentos; Embrapa Agroindústria Tropical; Embrapa Agropecuária Oeste; Embrapa Algodão; Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Arroz e Feijão; Embrapa Cerrados; Embrapa Clima Temperado... Mostrar Todas |
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| 45. | | FIALHO, J. de F.; ANDRADE, R. F. R. de; VIEIRA, E. A. (ed.). Mandioca no Cerrado: questões práticas. 2. ed. rev. e ampl. Brasília, DF: Embrapa, 2013. 88 p. Autores: Alaide Silva Vieira Gomes, EMATER-DF; Andreia Gonçalves Cavalcante, EMATER-DF; Charles Martins de Oliveira, CPAC; Eduardo Alano Vieira, CPAC; Francisco Duarte Fernandes, CPAC; José de Ribamar Nazareno dos Anjos, CPAC; Josefino de...| Biblioteca(s): Embrapa Amazônia Ocidental; Embrapa Cerrados. |
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| Registros recuperados : 294 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
14/11/2017 |
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Data da última atualização: |
14/11/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
VIEIRA, E. A.; SILVA, M das G.; MORO, C. F.; LAURA, V. A. |
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Afiliação: |
Evandro Alves Vieira, Instituto de Botânica, S~ao Paulo, SP, Brazil; Maria das Graças Silva, Universidade Estadual de Mato Grosso do Sul, Coxim, MS, Brazil; Camila Fernandes Moro, Universidade Estadual de Campinas, Campinas, SP, Brazil; VALDEMIR ANTONIO LAURA, CNPGC. |
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Título: |
Physiological and biochemical changes attenuate the effects of drought on the Cerrado species Vatairea macrocarpa (Benth.) Ducke. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Plant Physiology and Biochemistry, v. 115, p. 472-483, Jun. 2017. |
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DOI: |
10.1016/j.plaphy.2017.04.022 |
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Idioma: |
Inglês |
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Conteúdo: |
Drought is considered the main abiotic stress because it influences the distribution of plant species and limits the productivity of ecosystems. The aim of this study was to evaluate the effects of drought on physiological and biochemical parameters during the initial development of Vatairea macrocarpa, a native cerrado species. Plants were subjected to daily watering (control); suppression of watering during 90 days with field capacity (fc) 50% and 25% and then followed by rewatering. Relative leaf water content (RWC), gas exchange, photosynthetic pigments content, carbohydrate and amino acids content, antioxidant activities and growth were recorded. The RWC decreased according to the soil water restriction, causing reduction in stomatal conductance and decrease of 76.4% in net photosynthesis in plants submitted to 25% fc. Water restriction decreased the chlorophyll content, however increased carotenoid content and also improved the antioxidant activities of superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT). In addition, high levels of sugars (sucrose, raffinose) and amino acids (proline, tryptophan, valine, glutamine and GABA) were detected in drought stressed plants, contributing to osmoregulation and as sources of carbon and nitrogen after rehydration. Decreases in carbon assimilation promoted a reduction of the leaf area, however an increase in the root surface area was observed. After rewatering, the analized parameters became similar to the control plants indicating that the severe water stress did not impair the survival of young plants. Instead, adjustments were made to protect them against drought such as the maintenance of the assimilatory metabolism at minimal levels. MenosDrought is considered the main abiotic stress because it influences the distribution of plant species and limits the productivity of ecosystems. The aim of this study was to evaluate the effects of drought on physiological and biochemical parameters during the initial development of Vatairea macrocarpa, a native cerrado species. Plants were subjected to daily watering (control); suppression of watering during 90 days with field capacity (fc) 50% and 25% and then followed by rewatering. Relative leaf water content (RWC), gas exchange, photosynthetic pigments content, carbohydrate and amino acids content, antioxidant activities and growth were recorded. The RWC decreased according to the soil water restriction, causing reduction in stomatal conductance and decrease of 76.4% in net photosynthesis in plants submitted to 25% fc. Water restriction decreased the chlorophyll content, however increased carotenoid content and also improved the antioxidant activities of superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT). In addition, high levels of sugars (sucrose, raffinose) and amino acids (proline, tryptophan, valine, glutamine and GABA) were detected in drought stressed plants, contributing to osmoregulation and as sources of carbon and nitrogen after rehydration. Decreases in carbon assimilation promoted a reduction of the leaf area, however an increase in the root surface area was observed. After rewatering, the analized parameters became similar to the con... Mostrar Tudo |
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Palavras-Chave: |
Stomatal resistance; Vatairea macrocarpa; Water deficit plant. |
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Thesagro: |
Cerrado. |
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Thesaurus NAL: |
Amino acids; Osmoregulation; Photosynthesis; Raffinose; Specific growth rate; Sucrose. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/166695/1/Physiological-and-biochemical-changes.pdf
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Marc: |
LEADER 02621naa a2200289 a 4500
001 2079686
005 2017-11-14
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1016/j.plaphy.2017.04.022$2DOI
100 1 $aVIEIRA, E. A.
245 $aPhysiological and biochemical changes attenuate the effects of drought on the Cerrado species Vatairea macrocarpa (Benth.) Ducke.$h[electronic resource]
260 $c2017
520 $aDrought is considered the main abiotic stress because it influences the distribution of plant species and limits the productivity of ecosystems. The aim of this study was to evaluate the effects of drought on physiological and biochemical parameters during the initial development of Vatairea macrocarpa, a native cerrado species. Plants were subjected to daily watering (control); suppression of watering during 90 days with field capacity (fc) 50% and 25% and then followed by rewatering. Relative leaf water content (RWC), gas exchange, photosynthetic pigments content, carbohydrate and amino acids content, antioxidant activities and growth were recorded. The RWC decreased according to the soil water restriction, causing reduction in stomatal conductance and decrease of 76.4% in net photosynthesis in plants submitted to 25% fc. Water restriction decreased the chlorophyll content, however increased carotenoid content and also improved the antioxidant activities of superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT). In addition, high levels of sugars (sucrose, raffinose) and amino acids (proline, tryptophan, valine, glutamine and GABA) were detected in drought stressed plants, contributing to osmoregulation and as sources of carbon and nitrogen after rehydration. Decreases in carbon assimilation promoted a reduction of the leaf area, however an increase in the root surface area was observed. After rewatering, the analized parameters became similar to the control plants indicating that the severe water stress did not impair the survival of young plants. Instead, adjustments were made to protect them against drought such as the maintenance of the assimilatory metabolism at minimal levels.
650 $aAmino acids
650 $aOsmoregulation
650 $aPhotosynthesis
650 $aRaffinose
650 $aSpecific growth rate
650 $aSucrose
650 $aCerrado
653 $aStomatal resistance
653 $aVatairea macrocarpa
653 $aWater deficit plant
700 1 $aSILVA, M das G.
700 1 $aMORO, C. F.
700 1 $aLAURA, V. A.
773 $tPlant Physiology and Biochemistry$gv. 115, p. 472-483, Jun. 2017.
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