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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
17/10/2016 |
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Data da última atualização: |
10/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AGUIAR, N. O.; MEDICI, L. O.; OLIVARES, F. L.; DOBBSS, L. B.; TORRES-NETTO, A.; SILVA, S. F.; NOVOTNY, E. H.; CANELLAS, L. P. |
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Afiliação: |
N. O. AGUIAR, UENF; L. O. MEDICI, UFRRJ; F. L. OLIVARES, UENF; L. B. DOBBSS, UVV; A. TORRES-NETTO, UENF; S. F. SILVA, UENF; ETELVINO HENRIQUE NOVOTNY, CNPS; L. P. CANELLAS, UENF. |
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Título: |
Metabolic profile and antioxidant responses during drought stress recovery in sugarcane treated with humic acids and endophytic diazotrophic bacteria. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Annals of Applied Biology, v. 168, n. 2, p. 203-213, Mar. 2016. |
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DOI: |
https://doi.org/10.1111/aab.12256 |
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Idioma: |
Inglês |
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Conteúdo: |
Water deficit is the major yield-limiting factor for sugarcane crop production that can be enhanced by inoculating with plant growth promoting bacteria (PGPB) combined with humic substances. The aim of this work was to examine changes to the metabolic profile and antioxidant enzyme activity of sugarcane treated with PGPB and humic acid (HA) after drought and then rehydration. The drought was imposed by withholding irrigation for 21 days thereby measuring enzyme activity, metabolic profile and photosynthetic rate 1 week after rehydratation. Growth of plants treated with HA, PGPB and with both treatments combined (PGPB+HA) was higher than control plants. The antioxidant enzymes superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) activities remained higher after rehydration only in plants treated with HA. Plants treated with HA and PGPB+HA exhibited increased transpiration, stomatal conductance and net photosynthesis than plants treated with PGPB. The PGPB-treated plants exhibited drought resistance that resembled 'delayed stress onset', which is a new term for preserving water in the plants tissues. Water preservation in plants treated with PGPB was corroborated by higher relative water content (RWC) than control plants at the end of the drought period. Plants treated with HA+PGPB exhibited the highest water potential after rehydration and high RWC. Osmotic adjustment in the other treatments (control, HA and PGPB) was indicated by a new pattern of metabolic response after rehydration, including generally enhanced carbohydrates and proteins and specific changes induced by HA-enhancing aromatic compounds, whereas PGPB exhibited enhanced fatty acids and other aliphatic H species. Humic acids assist with drought stress recovery by inducing antioxidant enzyme activity whereas PGPB induced preservation of leaf water potential and RWC by closing stomata efficiently, resulting in plant water preservation. MenosWater deficit is the major yield-limiting factor for sugarcane crop production that can be enhanced by inoculating with plant growth promoting bacteria (PGPB) combined with humic substances. The aim of this work was to examine changes to the metabolic profile and antioxidant enzyme activity of sugarcane treated with PGPB and humic acid (HA) after drought and then rehydration. The drought was imposed by withholding irrigation for 21 days thereby measuring enzyme activity, metabolic profile and photosynthetic rate 1 week after rehydratation. Growth of plants treated with HA, PGPB and with both treatments combined (PGPB+HA) was higher than control plants. The antioxidant enzymes superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) activities remained higher after rehydration only in plants treated with HA. Plants treated with HA and PGPB+HA exhibited increased transpiration, stomatal conductance and net photosynthesis than plants treated with PGPB. The PGPB-treated plants exhibited drought resistance that resembled 'delayed stress onset', which is a new term for preserving water in the plants tissues. Water preservation in plants treated with PGPB was corroborated by higher relative water content (RWC) than control plants at the end of the drought period. Plants treated with HA+PGPB exhibited the highest water potential after rehydration and high RWC. Osmotic adjustment in the other treatments (control, HA and PGPB) was indicated by a new pattern of metabol... Mostrar Tudo |
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Palavras-Chave: |
Alívio de estresse hídrico; Bactéria fixadora de nitrogênio; Eficiência do uso da água; Substâncias húmicas. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02859naa a2200265 a 4500
001 2054728
005 2021-11-10
008 2016 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1111/aab.12256$2DOI
100 1 $aAGUIAR, N. O.
245 $aMetabolic profile and antioxidant responses during drought stress recovery in sugarcane treated with humic acids and endophytic diazotrophic bacteria.$h[electronic resource]
260 $c2016
520 $aWater deficit is the major yield-limiting factor for sugarcane crop production that can be enhanced by inoculating with plant growth promoting bacteria (PGPB) combined with humic substances. The aim of this work was to examine changes to the metabolic profile and antioxidant enzyme activity of sugarcane treated with PGPB and humic acid (HA) after drought and then rehydration. The drought was imposed by withholding irrigation for 21 days thereby measuring enzyme activity, metabolic profile and photosynthetic rate 1 week after rehydratation. Growth of plants treated with HA, PGPB and with both treatments combined (PGPB+HA) was higher than control plants. The antioxidant enzymes superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) activities remained higher after rehydration only in plants treated with HA. Plants treated with HA and PGPB+HA exhibited increased transpiration, stomatal conductance and net photosynthesis than plants treated with PGPB. The PGPB-treated plants exhibited drought resistance that resembled 'delayed stress onset', which is a new term for preserving water in the plants tissues. Water preservation in plants treated with PGPB was corroborated by higher relative water content (RWC) than control plants at the end of the drought period. Plants treated with HA+PGPB exhibited the highest water potential after rehydration and high RWC. Osmotic adjustment in the other treatments (control, HA and PGPB) was indicated by a new pattern of metabolic response after rehydration, including generally enhanced carbohydrates and proteins and specific changes induced by HA-enhancing aromatic compounds, whereas PGPB exhibited enhanced fatty acids and other aliphatic H species. Humic acids assist with drought stress recovery by inducing antioxidant enzyme activity whereas PGPB induced preservation of leaf water potential and RWC by closing stomata efficiently, resulting in plant water preservation.
653 $aAlívio de estresse hídrico
653 $aBactéria fixadora de nitrogênio
653 $aEficiência do uso da água
653 $aSubstâncias húmicas
700 1 $aMEDICI, L. O.
700 1 $aOLIVARES, F. L.
700 1 $aDOBBSS, L. B.
700 1 $aTORRES-NETTO, A.
700 1 $aSILVA, S. F.
700 1 $aNOVOTNY, E. H.
700 1 $aCANELLAS, L. P.
773 $tAnnals of Applied Biology$gv. 168, n. 2, p. 203-213, Mar. 2016.
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Registro original: |
Embrapa Solos (CNPS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
13/07/1999 |
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Data da última atualização: |
13/07/1999 |
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Autoria: |
SOUZA, P. I. M.; SPEHAR, C. R.; MOREIRA, C. T.; URBEN FILHO, G. |
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Título: |
Technology to extend soybean cultivation to the tropical savannas of Brazil. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
In: WORLD SOYBEAN RESEARCH CONFERENCE, 5., 1994, Chiang Mai, Thailand. Soybean feeds the world: proceedings. Bangkok: Kasetsart University Press, 1997. |
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Páginas: |
p.478-481. |
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Idioma: |
Inglês |
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Conteúdo: |
The potential areas for soybean cultivation in Brazil were located in the low latitude tropical region, for which there was no technology. The Brazilian savannas (cerrados) are characterized by low fertility soil (oxisols), definite rainy season and suitable temperature for plant growth. This region has become a major grain producer in the country, responding for about 50% of national soybean production. It required a series of modifications in crop management to adapt into the new frontier. Among the major technologies are varietal selection for long juvenile period; selection of acid-soil adapted strains of nitrogen-fixing bacteria; definition of suitable sowing and havest dates; fertilization and soil management to increase production and reduce the effects of dry spells; rotation with other crops to reduce the effects of disease and pests. The present work aimed to discuss these research contributions, pointing out the possibilities of their utilization in similar regions of the world. |
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Palavras-Chave: |
Cultivation; Cultivo. |
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Thesagro: |
Cerrado; Glycine Max; Soja; Tecnologia. |
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Thesaurus NAL: |
soybeans; technology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01781naa a2200265 a 4500
001 1545368
005 1999-07-13
008 1997 bl uuuu u00u1 u #d
100 1 $aSOUZA, P. I. M.
245 $aTechnology to extend soybean cultivation to the tropical savannas of Brazil.
260 $c1997
300 $ap.478-481.
520 $aThe potential areas for soybean cultivation in Brazil were located in the low latitude tropical region, for which there was no technology. The Brazilian savannas (cerrados) are characterized by low fertility soil (oxisols), definite rainy season and suitable temperature for plant growth. This region has become a major grain producer in the country, responding for about 50% of national soybean production. It required a series of modifications in crop management to adapt into the new frontier. Among the major technologies are varietal selection for long juvenile period; selection of acid-soil adapted strains of nitrogen-fixing bacteria; definition of suitable sowing and havest dates; fertilization and soil management to increase production and reduce the effects of dry spells; rotation with other crops to reduce the effects of disease and pests. The present work aimed to discuss these research contributions, pointing out the possibilities of their utilization in similar regions of the world.
650 $asoybeans
650 $atechnology
650 $aCerrado
650 $aGlycine Max
650 $aSoja
650 $aTecnologia
653 $aCultivation
653 $aCultivo
700 1 $aSPEHAR, C. R.
700 1 $aMOREIRA, C. T.
700 1 $aURBEN FILHO, G.
773 $tIn: WORLD SOYBEAN RESEARCH CONFERENCE, 5., 1994, Chiang Mai, Thailand. Soybean feeds the world: proceedings. Bangkok: Kasetsart University Press, 1997.
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