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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
29/08/2019 |
Data da última atualização: |
24/01/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
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. |
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. |
Título: |
Action of N-succinyl and N,O-dicarboxymethyl chitosan derivatives on chlorophyll photosynthesis and fluorescence in drought-sensitive maize. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Journal of Plant Growth Regulation, v. 38, p. 619-630, 2019. |
DOI: |
10.1007/s00344-018-9877-9 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Bioestimulante; Déficit hídrico; Potencial hídrico foliar; Trocas gasosas. |
Thesagro: |
Milho. |
Categoria do assunto: |
S Ciências Biológicas |
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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| Acesso ao texto completo restrito à biblioteca da Embrapa Hortaliças. Para informações adicionais entre em contato com cnph.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Hortaliças. |
Data corrente: |
19/05/1999 |
Data da última atualização: |
19/05/1999 |
Autoria: |
MADEIRA, M. C. B.; REIFSCHNEIDER, F. J. B.; CAFE FILHO, A. C. |
Título: |
Eficiencia e fitotoxidez de fungicidas no tratamento de sementes de lentilha para controle de Rhizoctonia solani, 1986. |
Ano de publicação: |
1988 |
Fonte/Imprenta: |
Horticultura Brasileira, Brasilia, v.6, n.1, p.36-37, maio 1988. |
Idioma: |
Português |
Palavras-Chave: |
Brasil; Brasilia; Control; Controle; Cultivar Precoz; Distrito Federal; Fungicide; Lens cullinaris; Lentil. |
Thesagro: |
Cerrado; Lentilha; Performance; Rhizoctonia Solani; Semente; Toxidez. |
Thesaurus NAL: |
Brazil; fungicides; seeds; toxicity. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00968naa a2200361 a 4500 001 1764187 005 1999-05-19 008 1988 bl uuuu u00u1 u #d 100 1 $aMADEIRA, M. C. B. 245 $aEficiencia e fitotoxidez de fungicidas no tratamento de sementes de lentilha para controle de Rhizoctonia solani, 1986. 260 $c1988 650 $aBrazil 650 $afungicides 650 $aseeds 650 $atoxicity 650 $aCerrado 650 $aLentilha 650 $aPerformance 650 $aRhizoctonia Solani 650 $aSemente 650 $aToxidez 653 $aBrasil 653 $aBrasilia 653 $aControl 653 $aControle 653 $aCultivar Precoz 653 $aDistrito Federal 653 $aFungicide 653 $aLens cullinaris 653 $aLentil 700 1 $aREIFSCHNEIDER, F. J. B. 700 1 $aCAFE FILHO, A. C. 773 $tHorticultura Brasileira, Brasilia$gv.6, n.1, p.36-37, maio 1988.
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