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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
05/02/2018 |
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Data da última atualização: |
05/02/2018 |
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Tipo da produção científica: |
Circular Técnica |
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Autoria: |
FONTES, J. R. A.; OLIVEIRA, I. J. de; MORAIS, R. R. de. |
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Afiliação: |
JOSE ROBERTO ANTONIOL FONTES, CPAA; INOCENCIO JUNIOR DE OLIVEIRA, CPAA; RONALDO RIBEIRO DE MORAIS, CPAA. |
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Título: |
Manejo de plantas daninhas na cultura do feijão-caupi - controle cultural em cultivares de portes prostrado e semiprostrado. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Manaus: Embrapa Amazônia Ocidental, 2017. |
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Páginas: |
7 p. |
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Série: |
(Embrapa Amazônia Ocidental. Circular técnica, 65). |
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ISSN: |
1517-2449 |
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Idioma: |
Português |
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Conteúdo: |
O objetivo deste trabalho foi avaliar a influência do aumento de população de plantas de cultivares de feijão-caupi de portes prostrado e semiprostrado em espaçamento de 45 cm entre fileiras de semeadura no crescimento de plantas daninhas. |
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Palavras-Chave: |
Feijão-caupi. |
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Thesagro: |
Erva Daninha; Vigna Unguiculata. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/172137/1/82017-Final.pdf
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Marc: |
LEADER 00917nam a2200205 a 4500
001 2087032
005 2018-02-05
008 2017 bl uuuu u0uu1 u #d
022 $a1517-2449
100 1 $aFONTES, J. R. A.
245 $aManejo de plantas daninhas na cultura do feijão-caupi - controle cultural em cultivares de portes prostrado e semiprostrado.$h[electronic resource]
260 $aManaus: Embrapa Amazônia Ocidental$c2017
300 $a7 p.
490 $a(Embrapa Amazônia Ocidental. Circular técnica, 65).
520 $aO objetivo deste trabalho foi avaliar a influência do aumento de população de plantas de cultivares de feijão-caupi de portes prostrado e semiprostrado em espaçamento de 45 cm entre fileiras de semeadura no crescimento de plantas daninhas.
650 $aErva Daninha
650 $aVigna Unguiculata
653 $aFeijão-caupi
700 1 $aOLIVEIRA, I. J. de
700 1 $aMORAIS, R. R. de
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Registro original: |
Embrapa Amazônia Ocidental (CPAA) |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
29/08/2019 |
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Data da última atualização: |
24/01/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
REIS, C. O. dos; MAGALHAES, P. C.; AVILA, R. G.; ALMEIDA, L. G.; RABELO, V. M.; CARVALHO, D. T.; CABRAL, D. F.; KARAM, D.; SOUZA, T. C. de. |
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Afiliação: |
Caroline Oliveira dos Reis, Universidade Federal de Alfenas; PAULO CESAR MAGALHAES, CNPMS; Roniel Geraldo Avila, Universidade Federal de Lavras; Lorena Gabriela Almeida, Universidade Federal de Lavras; Valquíria Mikaela Rabelo, Universidade Federal de Alfenas; Diogo Teixeira Carvalho, Universidade Federal de Alfenas; Daniela Ferreira Cabral, Universidade Federal de Alfenas; DECIO KARAM, CNPMS; Thiago Correa de Souza, Universidade Federal de Alfenas. |
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Título: |
Action of N-succinyl and N,O-dicarboxymethyl chitosan derivatives on chlorophyll photosynthesis and fluorescence in drought-sensitive maize. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Journal of Plant Growth Regulation, v. 38, p. 619-630, 2019. |
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DOI: |
10.1007/s00344-018-9877-9 |
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Idioma: |
Inglês |
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Conteúdo: |
Chitosan induces plant tolerance to various abiotic stresses, including water deficit. However, its use may be limited, due to its constitution and low solubility in water. Thus, chemical modifications were proposed in this study with the objective of potentializing its biological effects in maize plants. The derivatives were semi-synthesized (N-succinyl and N,O-dicarboxymethyl) and, together with chitosan, they were applied, via the leaf, in a drought-sensitive maize hybrid (BRS1030) under pre-flowering water deficit. The water deficit was maintained for 15 days and the analyses were performed at the beginning and end of stress, and also in rehydration. Leaf water potential, gas exchange, chlorophyll fluorescence, and content of chloroplastidic pigments were evaluated. The use of the derivatives modulated photosynthesis parameters, affecting the involved mechanisms, such as stomatal activity, water use efficiency and photosystem II activity. Chlorophyll fluorescence indicated that the antenna complex was damaged by the water deficit condition, with a decrease in the energy flux in the electron transport chain and in the photochemical phase of photosynthesis. However, the spraying of chitosan derivatives induced tolerance to water deficit, suggesting that chitosan derivatives are more bioavailable to plants. Water stress decreases pigment content, but both the application of chitosan and derivatives increased these contents. It is concluded that chitosan derivatives improved the photosynthetic parameters in maize susceptible to drought, inducing tolerance to this stress, and the possible reasons and consequences are discussed. MenosChitosan induces plant tolerance to various abiotic stresses, including water deficit. However, its use may be limited, due to its constitution and low solubility in water. Thus, chemical modifications were proposed in this study with the objective of potentializing its biological effects in maize plants. The derivatives were semi-synthesized (N-succinyl and N,O-dicarboxymethyl) and, together with chitosan, they were applied, via the leaf, in a drought-sensitive maize hybrid (BRS1030) under pre-flowering water deficit. The water deficit was maintained for 15 days and the analyses were performed at the beginning and end of stress, and also in rehydration. Leaf water potential, gas exchange, chlorophyll fluorescence, and content of chloroplastidic pigments were evaluated. The use of the derivatives modulated photosynthesis parameters, affecting the involved mechanisms, such as stomatal activity, water use efficiency and photosystem II activity. Chlorophyll fluorescence indicated that the antenna complex was damaged by the water deficit condition, with a decrease in the energy flux in the electron transport chain and in the photochemical phase of photosynthesis. However, the spraying of chitosan derivatives induced tolerance to water deficit, suggesting that chitosan derivatives are more bioavailable to plants. Water stress decreases pigment content, but both the application of chitosan and derivatives increased these contents. It is concluded that chitosan derivatives improved... Mostrar Tudo |
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Palavras-Chave: |
Bioestimulante; Déficit hídrico; Potencial hídrico foliar; Trocas gasosas. |
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Thesagro: |
Milho. |
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Categoria do assunto: |
S Ciências Biológicas |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/201386/1/Action-N-succinyl.pdf
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Marc: |
LEADER 02553naa a2200289 a 4500
001 2111698
005 2020-01-24
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1007/s00344-018-9877-9$2DOI
100 1 $aREIS, C. O. dos
245 $aAction of N-succinyl and N,O-dicarboxymethyl chitosan derivatives on chlorophyll photosynthesis and fluorescence in drought-sensitive maize.$h[electronic resource]
260 $c2019
520 $aChitosan induces plant tolerance to various abiotic stresses, including water deficit. However, its use may be limited, due to its constitution and low solubility in water. Thus, chemical modifications were proposed in this study with the objective of potentializing its biological effects in maize plants. The derivatives were semi-synthesized (N-succinyl and N,O-dicarboxymethyl) and, together with chitosan, they were applied, via the leaf, in a drought-sensitive maize hybrid (BRS1030) under pre-flowering water deficit. The water deficit was maintained for 15 days and the analyses were performed at the beginning and end of stress, and also in rehydration. Leaf water potential, gas exchange, chlorophyll fluorescence, and content of chloroplastidic pigments were evaluated. The use of the derivatives modulated photosynthesis parameters, affecting the involved mechanisms, such as stomatal activity, water use efficiency and photosystem II activity. Chlorophyll fluorescence indicated that the antenna complex was damaged by the water deficit condition, with a decrease in the energy flux in the electron transport chain and in the photochemical phase of photosynthesis. However, the spraying of chitosan derivatives induced tolerance to water deficit, suggesting that chitosan derivatives are more bioavailable to plants. Water stress decreases pigment content, but both the application of chitosan and derivatives increased these contents. It is concluded that chitosan derivatives improved the photosynthetic parameters in maize susceptible to drought, inducing tolerance to this stress, and the possible reasons and consequences are discussed.
650 $aMilho
653 $aBioestimulante
653 $aDéficit hídrico
653 $aPotencial hídrico foliar
653 $aTrocas gasosas
700 1 $aMAGALHAES, P. C.
700 1 $aAVILA, R. G.
700 1 $aALMEIDA, L. G.
700 1 $aRABELO, V. M.
700 1 $aCARVALHO, D. T.
700 1 $aCABRAL, D. F.
700 1 $aKARAM, D.
700 1 $aSOUZA, T. C. de
773 $tJournal of Plant Growth Regulation$gv. 38, p. 619-630, 2019.
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Embrapa Milho e Sorgo (CNPMS) |
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