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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
22/02/2022 |
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Data da última atualização: |
24/02/2022 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
VASQUES, G. de M.; RODRIGUES, H. M.; TAVARES, S. R. de L.; HERNANI, L. C.; OLIVEIRA, R. P. de. |
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Afiliação: |
GUSTAVO DE MATTOS VASQUES, CNPS; HUGO MACHADO RODRIGUES, UFRRJ; SILVIO ROBERTO DE LUCENA TAVARES, CNPS; LUIS CARLOS HERNANI, CNPS; RONALDO PEREIRA DE OLIVEIRA, CNPS. |
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Título: |
An optimized sample for assessing soil property variations across the field and within management zones efficiently. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
In: PEDOMETRICS BRAZIL, 2., 2021, Rio de Janeiro. Annals [...]. Rio de Janeiro: Embrapa Solos, 2022. Não paginado. Evento online. |
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Idioma: |
Inglês |
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Conteúdo: |
An optimized sampling design to assess soil property variation across the field and within management zones is proposed and validated in a 72-ha crop field in southeastern Brazil. An optimized sample (18 sites) was derived by spatial simulated annealing from proximal sensor covariates. Soil properties were measured at 0-10 cm and validated against those measured at 72 sites on a regular grid. The optimized and regular grid samples had equal global spatial trend models and means for soil clay, pH and exchangeable Ca, Mg and K, and different ones for organic C and available P. Within zones, equal means between sampling designs were found for all soil properties in the ?North? zone, and for most properties in the other two zones. Soil property correlations against proximal sensor variables were honored by the optimized samples in most cases, both globally and within zones. The optimized soil sample reduces costs while keeping most soil information for guiding management decisions. |
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Palavras-Chave: |
Proximal soil sensing; Spatial simulated annealing; Spatial trends. |
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Thesagro: |
Agricultura de Precisão; Sensoriamento Remoto. |
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Thesaurus Nal: |
Precision agriculture; Remote sensing. |
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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/231718/1/An-optimized-sample-for-assessing-soil-property-variations-2022.pdf
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Marc: |
LEADER 01870nam a2200241 a 4500
001 2140307
005 2022-02-24
008 2022 bl uuuu u00u1 u #d
100 1 $aVASQUES, G. de M.
245 $aAn optimized sample for assessing soil property variations across the field and within management zones efficiently.$h[electronic resource]
260 $aIn: PEDOMETRICS BRAZIL, 2., 2021, Rio de Janeiro. Annals [...]. Rio de Janeiro: Embrapa Solos, 2022. Não paginado. Evento online.$c2022
520 $aAn optimized sampling design to assess soil property variation across the field and within management zones is proposed and validated in a 72-ha crop field in southeastern Brazil. An optimized sample (18 sites) was derived by spatial simulated annealing from proximal sensor covariates. Soil properties were measured at 0-10 cm and validated against those measured at 72 sites on a regular grid. The optimized and regular grid samples had equal global spatial trend models and means for soil clay, pH and exchangeable Ca, Mg and K, and different ones for organic C and available P. Within zones, equal means between sampling designs were found for all soil properties in the ?North? zone, and for most properties in the other two zones. Soil property correlations against proximal sensor variables were honored by the optimized samples in most cases, both globally and within zones. The optimized soil sample reduces costs while keeping most soil information for guiding management decisions.
650 $aPrecision agriculture
650 $aRemote sensing
650 $aAgricultura de Precisão
650 $aSensoriamento Remoto
653 $aProximal soil sensing
653 $aSpatial simulated annealing
653 $aSpatial trends
700 1 $aRODRIGUES, H. M.
700 1 $aTAVARES, S. R. de L.
700 1 $aHERNANI, L. C.
700 1 $aOLIVEIRA, R. P. de
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Registro original: |
Embrapa Solos (CNPS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
10/02/2009 |
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Data da última atualização: |
10/02/2009 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
MARTINS, P. K.; JORDÃO, B. Q.; YAMANAKA, N.; FARIAS, J. R. B.; BENEVENTI, M. A.; BINNECK, E.; FUGANTI, R.; STOLF, R.; NEPOMUCENO, A. L. |
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Afiliação: |
Polyana K. Martins, UEL; Berenice Q. Jordão, UEL; Naoki Yamanaka, JIRCAS; José Renato Bouças Farias. CNPSo; Magda Aparecida Beneventi, UEL; Eliseu Binneck, CNPSo; Renata Fuganti, UEL; Renata Stolf, UEL; Alexandre Lima Nepomuceno, CNPSo. |
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Título: |
Differential gene expression and mitotic cell analysis of the drought tolerant soybean (Glycine max L. Merrill Fabales, Fabaceae) cultivar MG/BR46 (Conquista) under two water deficit induction systems. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Genetics and Molecular Biology, Ribeirão Preto, v. 31, n. 2, p. 512-521, 2008. |
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Idioma: |
Inglês |
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Conteúdo: |
Drought cause serious yield losses in soybean (Glycine max), roots being the first plant organ to detect the water- stress signals triggering defense mechanisms. We used two drought induction systems to identify genes differentially expressed in the roots of the drought-tolerant soybean cultivar MG/BR46 (Conquista) and characterize their expression levels during water deficit. Soybean plants grown in nutrient solution hydroponically and in sand-pots were submitted to water stress and gene expression analysis was conducted using the differential display (DD) and real time polymerase chain reaction (PCR) techniques. Three differentially expressed mRNA transcripts showed homology to the Antirrhinum majus basic helix-loop-helix transcription factor bHLH, the Arabidopsis thaliana phosphatidylinositol transfer protein PITP and the auxin-independent growth regulator 1 (axi 1). The hydroponic experiments showed that after 100 min outside the nutrient solution photosynthesis completely stopped, stomata closed and leaf temperature rose. Both stress induction treatments produced significant decrease in the mitotic indices of root cells. Axi 1, PITP and bHLH were not only differentially expressed during dehydration in the hydroponics experiments but also during induced drought in the pot experiments. Although, there were differences between the two sets of experiments in the time at which up or down regulation occurred, the expression pattern of all three transcripts was related. Similar gene expression and cytological analysis results occurred in both systems, suggesting that hydroponics could be used to simulate drought detection by roots growing in soil and thus facilitate rapid and easy root sampling. MenosDrought cause serious yield losses in soybean (Glycine max), roots being the first plant organ to detect the water- stress signals triggering defense mechanisms. We used two drought induction systems to identify genes differentially expressed in the roots of the drought-tolerant soybean cultivar MG/BR46 (Conquista) and characterize their expression levels during water deficit. Soybean plants grown in nutrient solution hydroponically and in sand-pots were submitted to water stress and gene expression analysis was conducted using the differential display (DD) and real time polymerase chain reaction (PCR) techniques. Three differentially expressed mRNA transcripts showed homology to the Antirrhinum majus basic helix-loop-helix transcription factor bHLH, the Arabidopsis thaliana phosphatidylinositol transfer protein PITP and the auxin-independent growth regulator 1 (axi 1). The hydroponic experiments showed that after 100 min outside the nutrient solution photosynthesis completely stopped, stomata closed and leaf temperature rose. Both stress induction treatments produced significant decrease in the mitotic indices of root cells. Axi 1, PITP and bHLH were not only differentially expressed during dehydration in the hydroponics experiments but also during induced drought in the pot experiments. Although, there were differences between the two sets of experiments in the time at which up or down regulation occurred, the expression pattern of all three transcripts was related. Simila... Mostrar Tudo |
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Categoria do assunto: |
-- |
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URL: |
https://www.scielo.br/pdf/gmb/v31n2/a19v31n2.pdf
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Marc: |
LEADER 02469naa a2200217 a 4500
001 1471496
005 2009-02-10
008 2008 bl --- 0-- u #d
100 1 $aMARTINS, P. K.
245 $aDifferential gene expression and mitotic cell analysis of the drought tolerant soybean (Glycine max L. Merrill Fabales, Fabaceae) cultivar MG/BR46 (Conquista) under two water deficit induction systems.
260 $c2008
520 $aDrought cause serious yield losses in soybean (Glycine max), roots being the first plant organ to detect the water- stress signals triggering defense mechanisms. We used two drought induction systems to identify genes differentially expressed in the roots of the drought-tolerant soybean cultivar MG/BR46 (Conquista) and characterize their expression levels during water deficit. Soybean plants grown in nutrient solution hydroponically and in sand-pots were submitted to water stress and gene expression analysis was conducted using the differential display (DD) and real time polymerase chain reaction (PCR) techniques. Three differentially expressed mRNA transcripts showed homology to the Antirrhinum majus basic helix-loop-helix transcription factor bHLH, the Arabidopsis thaliana phosphatidylinositol transfer protein PITP and the auxin-independent growth regulator 1 (axi 1). The hydroponic experiments showed that after 100 min outside the nutrient solution photosynthesis completely stopped, stomata closed and leaf temperature rose. Both stress induction treatments produced significant decrease in the mitotic indices of root cells. Axi 1, PITP and bHLH were not only differentially expressed during dehydration in the hydroponics experiments but also during induced drought in the pot experiments. Although, there were differences between the two sets of experiments in the time at which up or down regulation occurred, the expression pattern of all three transcripts was related. Similar gene expression and cytological analysis results occurred in both systems, suggesting that hydroponics could be used to simulate drought detection by roots growing in soil and thus facilitate rapid and easy root sampling.
700 1 $aJORDÃO, B. Q.
700 1 $aYAMANAKA, N.
700 1 $aFARIAS, J. R. B.
700 1 $aBENEVENTI, M. A.
700 1 $aBINNECK, E.
700 1 $aFUGANTI, R.
700 1 $aSTOLF, R.
700 1 $aNEPOMUCENO, A. L.
773 $tGenetics and Molecular Biology, Ribeirão Preto$gv. 31, n. 2, p. 512-521, 2008.
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