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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
18/02/2016 |
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Data da última atualização: |
18/02/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
DOMICIANO, G. P.; CACIQUE, I. S.; FREITAS, C. C.; FILIPPI, M. C. C.; DAMATTA, F. M.; VALE, F. X. R. do; RODRIGUES, F. A. |
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Afiliação: |
GISELE PEREIRA DOMICIANO, UFV; ISAIAS SEVERINO CACIQUE, UFV; CECILIA CHAGAS FREITAS, UFV; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; FABIO MURILO DAMATTA, UFV; FRANCISCO XAVIER RIBEIRO DO VALE, UFV; FABRÍCIO ÁVILA RODRIGUES, UFV. |
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Título: |
Alterations in gas exchange and oxidative metabolism in rice leaves infected by Pyricularia oryzae are attenuated by silicon. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Phytopathology, v. 105, n. 6, p. 738-747, June 2015. |
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DOI: |
10.1094/PHYTO-10-14-0280-R |
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Idioma: |
Inglês |
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Conteúdo: |
Rice blast, caused by Pyricularia oryzae, is the most important disease in rice worldwide. This study investigated the effects of silicon (Si) on the photosynthetic gas exchange parameters (net CO2 assimilation rate [A], stomatal conductance to water vapor [gs], internal-to-ambient CO2 concentration ratio [Ci/Ca], and transpiration rate [E]); chlorophyll fluorescence a (Chla) parameters (maximum photochemical efficiency of photosystem II [Fv/Fm], photochemical [qP] and nonphotochemical [NPQ] quenching coefficients, and electron transport rate [ETR]); concentrations of pigments, malondialdehyde (MDA), and hydrogen peroxide (H2O2); and activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), glutathione reductase (GR), and lypoxigenase (LOX) in rice leaves. Rice plants were grown in a nutrient solution containing 0 or 2 mM Si (-Si or +Si, respectively) with and without P. oryzae inoculation. Blast severity decreased with higher foliar Si concentration. The values of A, gs and E were generally higher for the +Si plants in comparison with the -Si plants upon P. oryzae infection. The Fv/Fm, qp, NPQ, and ETR were greater for the +Si plants relative to the -Si plants at 108 and 132 h after inoculation (hai). The values for qp and ETR were significantly higher for the -Si plants in comparison with the +Si plants at 36 hai, and the NPQ was significantly higher for the -Si plants in comparison with the +Si plants at 0 and 36 hai. The concentrations of Chla, Chlb, Chla+b, and carotenoids were significantly greater in the +Si plants relative to the -Si plants. For the -Si plants, the MDA and H2O2 concentrations were significantly higher than those in the +Si plants. The LOX activity was significantly higher in the +Si plants than in the -Si plants. The SOD and GR activities were significantly higher for the -Si plants than in the +Si plants. The CAT and APX activities were significantly higher in the +Si plants than in the -Si plants. The supply of Si contributed to a decrease in blast severity, improved the gas exchange performance, and caused less dysfunction at the photochemical level. MenosRice blast, caused by Pyricularia oryzae, is the most important disease in rice worldwide. This study investigated the effects of silicon (Si) on the photosynthetic gas exchange parameters (net CO2 assimilation rate [A], stomatal conductance to water vapor [gs], internal-to-ambient CO2 concentration ratio [Ci/Ca], and transpiration rate [E]); chlorophyll fluorescence a (Chla) parameters (maximum photochemical efficiency of photosystem II [Fv/Fm], photochemical [qP] and nonphotochemical [NPQ] quenching coefficients, and electron transport rate [ETR]); concentrations of pigments, malondialdehyde (MDA), and hydrogen peroxide (H2O2); and activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), glutathione reductase (GR), and lypoxigenase (LOX) in rice leaves. Rice plants were grown in a nutrient solution containing 0 or 2 mM Si (-Si or +Si, respectively) with and without P. oryzae inoculation. Blast severity decreased with higher foliar Si concentration. The values of A, gs and E were generally higher for the +Si plants in comparison with the -Si plants upon P. oryzae infection. The Fv/Fm, qp, NPQ, and ETR were greater for the +Si plants relative to the -Si plants at 108 and 132 h after inoculation (hai). The values for qp and ETR were significantly higher for the -Si plants in comparison with the +Si plants at 36 hai, and the NPQ was significantly higher for the -Si plants in comparison with the +Si plants at 0 and 36 hai. The concentrations of Chla... Mostrar Tudo |
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Palavras-Chave: |
Fungal infection. |
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Thesagro: |
Arroz; Brusone; Doença de planta; Fotossíntese; Oryza sativa; Pyricularia oryzae. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 03018naa a2200289 a 4500
001 2037587
005 2016-02-18
008 2015 bl uuuu u00u1 u #d
024 7 $a10.1094/PHYTO-10-14-0280-R$2DOI
100 1 $aDOMICIANO, G. P.
245 $aAlterations in gas exchange and oxidative metabolism in rice leaves infected by Pyricularia oryzae are attenuated by silicon.$h[electronic resource]
260 $c2015
520 $aRice blast, caused by Pyricularia oryzae, is the most important disease in rice worldwide. This study investigated the effects of silicon (Si) on the photosynthetic gas exchange parameters (net CO2 assimilation rate [A], stomatal conductance to water vapor [gs], internal-to-ambient CO2 concentration ratio [Ci/Ca], and transpiration rate [E]); chlorophyll fluorescence a (Chla) parameters (maximum photochemical efficiency of photosystem II [Fv/Fm], photochemical [qP] and nonphotochemical [NPQ] quenching coefficients, and electron transport rate [ETR]); concentrations of pigments, malondialdehyde (MDA), and hydrogen peroxide (H2O2); and activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), glutathione reductase (GR), and lypoxigenase (LOX) in rice leaves. Rice plants were grown in a nutrient solution containing 0 or 2 mM Si (-Si or +Si, respectively) with and without P. oryzae inoculation. Blast severity decreased with higher foliar Si concentration. The values of A, gs and E were generally higher for the +Si plants in comparison with the -Si plants upon P. oryzae infection. The Fv/Fm, qp, NPQ, and ETR were greater for the +Si plants relative to the -Si plants at 108 and 132 h after inoculation (hai). The values for qp and ETR were significantly higher for the -Si plants in comparison with the +Si plants at 36 hai, and the NPQ was significantly higher for the -Si plants in comparison with the +Si plants at 0 and 36 hai. The concentrations of Chla, Chlb, Chla+b, and carotenoids were significantly greater in the +Si plants relative to the -Si plants. For the -Si plants, the MDA and H2O2 concentrations were significantly higher than those in the +Si plants. The LOX activity was significantly higher in the +Si plants than in the -Si plants. The SOD and GR activities were significantly higher for the -Si plants than in the +Si plants. The CAT and APX activities were significantly higher in the +Si plants than in the -Si plants. The supply of Si contributed to a decrease in blast severity, improved the gas exchange performance, and caused less dysfunction at the photochemical level.
650 $aArroz
650 $aBrusone
650 $aDoença de planta
650 $aFotossíntese
650 $aOryza sativa
650 $aPyricularia oryzae
653 $aFungal infection
700 1 $aCACIQUE, I. S.
700 1 $aFREITAS, C. C.
700 1 $aFILIPPI, M. C. C.
700 1 $aDAMATTA, F. M.
700 1 $aVALE, F. X. R. do
700 1 $aRODRIGUES, F. A.
773 $tPhytopathology$gv. 105, n. 6, p. 738-747, June 2015.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
18/02/2016 |
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Data da última atualização: |
15/04/2016 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
REIS, L. C.; FIGUEIREDO, R. de O.; PICCOLO, M. C.; CAMARGO, P. B. de; COSTA, C. F. G.; ZUCCARI, M. L.; GREEN, T. R. |
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Afiliação: |
L. C. REIS, USP; RICARDO DE OLIVEIRA FIGUEIREDO, CNPMA; M. C. PICCOLO, USP; P. B. de CAMARGO, USP; C. F. G. COSTA, CENA/ESALQ/USP; MARIA LUCIA ZUCCARI, CNPMA; T. R. GREEN, USDA ARS. |
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Título: |
Stream water quality in the context of payments for environmental services in Southeastern Brazil. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: 2015 AGU FALL MEETING, 2015, San Francisco. E-posters... San Francisco: 2015. Ref. H43B-1481. |
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Idioma: |
Inglês |
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Conteúdo: |
Public policy of payment for environmental services (PES) was established in 2007 to face the challenge of recuperatingwater resources at one of the headwater areas of the Jaguari River Basin, which supplies an important reservoir for the metropolitan region of São Paulo, Brazil. Such effort consists of reforestation of riparian zones and spring lands at the hills of selected catchments, including the Ribeirão das Posses (RP) catchment. Since 2012 the University of São Paulo has developed research at RP to monitor the benefits of these practices on stream water quality, and identified a few parameters as good indicators to follow up the results of this PES program. The present study has the objective to show results of the monthly monitoring in 2015,including 13 sampling stations at RP catchment distributed as follows: one in a spring forested area, three in spring areas of different ages of reforestation (3, 5 and 8 years), and nine at reaches of RP streamlocated in a way to contemplate the effects of the first order streams that comes from the studied spring areas entering RP. We established two additional stations at the Jaguari River, upstream and downstream of RP outlet. In situ measurements include temperature, pH, electric conductivity (EC) and dissolved oxygen (DO), and collect water samples to bring to the laboratory for analyses of dissolved organic and inorganic carbon (DOC and DIC), total nitrogen (TN) and alkalinity. Also, sediments (fine fraction: >0.45 ?m; and coarse fraction: >63 ?m) are collected for isotopic carbon analyses. Preliminary results show pH values ranging from 5.5 to 7.8, while DO ranges from 5.8 to 8.9 mg L . As for EC, the mean at the spring forested station was 34.6 ?S cm , while at spring areas of 3, 6 and 8 years of reforestation they were 53.3, 73.8 and 34.8 ?S cm , respectively. We expected that by the end of this annual monitoring the benefits of reforestation will be affirmed. MenosPublic policy of payment for environmental services (PES) was established in 2007 to face the challenge of recuperatingwater resources at one of the headwater areas of the Jaguari River Basin, which supplies an important reservoir for the metropolitan region of São Paulo, Brazil. Such effort consists of reforestation of riparian zones and spring lands at the hills of selected catchments, including the Ribeirão das Posses (RP) catchment. Since 2012 the University of São Paulo has developed research at RP to monitor the benefits of these practices on stream water quality, and identified a few parameters as good indicators to follow up the results of this PES program. The present study has the objective to show results of the monthly monitoring in 2015,including 13 sampling stations at RP catchment distributed as follows: one in a spring forested area, three in spring areas of different ages of reforestation (3, 5 and 8 years), and nine at reaches of RP streamlocated in a way to contemplate the effects of the first order streams that comes from the studied spring areas entering RP. We established two additional stations at the Jaguari River, upstream and downstream of RP outlet. In situ measurements include temperature, pH, electric conductivity (EC) and dissolved oxygen (DO), and collect water samples to bring to the laboratory for analyses of dissolved organic and inorganic carbon (DOC and DIC), total nitrogen (TN) and alkalinity. Also, sediments (fine fraction: >0.45 ?m; and... Mostrar Tudo |
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Thesagro: |
Água. |
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Thesaurus NAL: |
Ecosystem services. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/139355/1/2015RA-030.pdf
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Marc: |
LEADER 02631nam a2200205 a 4500
001 2037580
005 2016-04-15
008 2015 bl uuuu u00u1 u #d
100 1 $aREIS, L. C.
245 $aStream water quality in the context of payments for environmental services in Southeastern Brazil.$h[electronic resource]
260 $aIn: 2015 AGU FALL MEETING, 2015, San Francisco. E-posters... San Francisco: 2015. Ref. H43B-1481.$c2015
520 $aPublic policy of payment for environmental services (PES) was established in 2007 to face the challenge of recuperatingwater resources at one of the headwater areas of the Jaguari River Basin, which supplies an important reservoir for the metropolitan region of São Paulo, Brazil. Such effort consists of reforestation of riparian zones and spring lands at the hills of selected catchments, including the Ribeirão das Posses (RP) catchment. Since 2012 the University of São Paulo has developed research at RP to monitor the benefits of these practices on stream water quality, and identified a few parameters as good indicators to follow up the results of this PES program. The present study has the objective to show results of the monthly monitoring in 2015,including 13 sampling stations at RP catchment distributed as follows: one in a spring forested area, three in spring areas of different ages of reforestation (3, 5 and 8 years), and nine at reaches of RP streamlocated in a way to contemplate the effects of the first order streams that comes from the studied spring areas entering RP. We established two additional stations at the Jaguari River, upstream and downstream of RP outlet. In situ measurements include temperature, pH, electric conductivity (EC) and dissolved oxygen (DO), and collect water samples to bring to the laboratory for analyses of dissolved organic and inorganic carbon (DOC and DIC), total nitrogen (TN) and alkalinity. Also, sediments (fine fraction: >0.45 ?m; and coarse fraction: >63 ?m) are collected for isotopic carbon analyses. Preliminary results show pH values ranging from 5.5 to 7.8, while DO ranges from 5.8 to 8.9 mg L . As for EC, the mean at the spring forested station was 34.6 ?S cm , while at spring areas of 3, 6 and 8 years of reforestation they were 53.3, 73.8 and 34.8 ?S cm , respectively. We expected that by the end of this annual monitoring the benefits of reforestation will be affirmed.
650 $aEcosystem services
650 $aÁgua
700 1 $aFIGUEIREDO, R. de O.
700 1 $aPICCOLO, M. C.
700 1 $aCAMARGO, P. B. de
700 1 $aCOSTA, C. F. G.
700 1 $aZUCCARI, M. L.
700 1 $aGREEN, T. R.
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Embrapa Meio Ambiente (CNPMA) |
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