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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
13/07/2022 |
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Data da última atualização: |
13/07/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
REIS, C. O. dos; MAGALHAES, P. C.; AMBROSIO, A. dos S.; ALMEIDA, L. G.; CARVALHO, D. T.; SOUZA, T. C, de. |
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Afiliação: |
CAROLINE OLIVEIRA DOS REIS, Universidade Federal de Lavras; PAULO CESAR MAGALHAES, CNPMS; ALEXANDRA DOS SANTOS AMBRÓSIO, Universidade Federal de Alfenas; LORENA GABRIELA ALMEIDA, Universidade Federal de Lavras; DIOGO TEIXEIRA CARVALHO, Universidade Federal de Alfenas; THIAGO CORREA DE SOUZA, Universidade Federal de Alfenas. |
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Título: |
Do chitosan and its derivatives have the same protective effect on drought-contrasting maize genotypes? An analysis of physiological and production processes. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Australian Journal of Crop Science, v. 16, n. 2, p. 208-215, 2022. |
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Idioma: |
Português |
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Conteúdo: |
Water stress is among the most severe abiotic stress factors for maize production. The application of chitosan causes various responses in plants, as a function of its structure and concentration. Therefore, chemical modifications were proposed in this study to enhance the biological effects on plants. Hybrid maize plants with drought-contrasting characteristics, were subjected to water deficit and spraying with chitosan (CHI) and semi-synthesized chitosan derivatives, N‑Succinyl (SUC) and N,O‑Dicarboxymethyl (MCA). The obtained data show that the application of CHI and its derivatives (0.5 mg.plant-1 ) led to an increase in production for the two evaluated hybrids in comparison with the control under stress. Regarding leaf gas exchange, over the stress period, it was observed that the application of the MCA derivative yielded greater Pn than the other treatments in plants subjected to drought, in both hybrids. In the evaluation of chlorophyll content, there was an increase in this content through the application of CHI and its derivatives for both maize hybrids under study. With water recovery in plants, the water potential (Ψmd) of those treated with chitosan derivatives was greater than that of the irrigated control plants. In the quantification of proline concentration, higher values were observed in plants treated with MCA derivatives for the drought-sensitive hybrid. Chitosan derivatives, SUC and MCA, were responsible for higher starch concentrations in both maize hybrids. Evaluating the morphological characteristics of roots, the drought-tolerant hybrid showed higher means for all parameters evaluated when subjected to drought, and MCA was responsible for longer root length and greater mean root diameter. The results support the potential use of chitosan and its derivatives to increase tolerance to water deficit in maize. MenosWater stress is among the most severe abiotic stress factors for maize production. The application of chitosan causes various responses in plants, as a function of its structure and concentration. Therefore, chemical modifications were proposed in this study to enhance the biological effects on plants. Hybrid maize plants with drought-contrasting characteristics, were subjected to water deficit and spraying with chitosan (CHI) and semi-synthesized chitosan derivatives, N‑Succinyl (SUC) and N,O‑Dicarboxymethyl (MCA). The obtained data show that the application of CHI and its derivatives (0.5 mg.plant-1 ) led to an increase in production for the two evaluated hybrids in comparison with the control under stress. Regarding leaf gas exchange, over the stress period, it was observed that the application of the MCA derivative yielded greater Pn than the other treatments in plants subjected to drought, in both hybrids. In the evaluation of chlorophyll content, there was an increase in this content through the application of CHI and its derivatives for both maize hybrids under study. With water recovery in plants, the water potential (Ψmd) of those treated with chitosan derivatives was greater than that of the irrigated control plants. In the quantification of proline concentration, higher values were observed in plants treated with MCA derivatives for the drought-sensitive hybrid. Chitosan derivatives, SUC and MCA, were responsible for higher starch concentrations i... Mostrar Tudo |
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Palavras-Chave: |
Quitosana. |
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Thesagro: |
Milho; Seca. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1144687/1/Do-chitosan-and-its-derivatives-have-the-same-protective-effect.pdf
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Marc: |
LEADER 02583naa a2200217 a 4500
001 2144687
005 2022-07-13
008 2022 bl uuuu u00u1 u #d
100 1 $aREIS, C. O. dos
245 $aDo chitosan and its derivatives have the same protective effect on drought-contrasting maize genotypes? An analysis of physiological and production processes.$h[electronic resource]
260 $c2022
520 $aWater stress is among the most severe abiotic stress factors for maize production. The application of chitosan causes various responses in plants, as a function of its structure and concentration. Therefore, chemical modifications were proposed in this study to enhance the biological effects on plants. Hybrid maize plants with drought-contrasting characteristics, were subjected to water deficit and spraying with chitosan (CHI) and semi-synthesized chitosan derivatives, N‑Succinyl (SUC) and N,O‑Dicarboxymethyl (MCA). The obtained data show that the application of CHI and its derivatives (0.5 mg.plant-1 ) led to an increase in production for the two evaluated hybrids in comparison with the control under stress. Regarding leaf gas exchange, over the stress period, it was observed that the application of the MCA derivative yielded greater Pn than the other treatments in plants subjected to drought, in both hybrids. In the evaluation of chlorophyll content, there was an increase in this content through the application of CHI and its derivatives for both maize hybrids under study. With water recovery in plants, the water potential (Ψmd) of those treated with chitosan derivatives was greater than that of the irrigated control plants. In the quantification of proline concentration, higher values were observed in plants treated with MCA derivatives for the drought-sensitive hybrid. Chitosan derivatives, SUC and MCA, were responsible for higher starch concentrations in both maize hybrids. Evaluating the morphological characteristics of roots, the drought-tolerant hybrid showed higher means for all parameters evaluated when subjected to drought, and MCA was responsible for longer root length and greater mean root diameter. The results support the potential use of chitosan and its derivatives to increase tolerance to water deficit in maize.
650 $aMilho
650 $aSeca
653 $aQuitosana
700 1 $aMAGALHAES, P. C.
700 1 $aAMBROSIO, A. dos S.
700 1 $aALMEIDA, L. G.
700 1 $aCARVALHO, D. T.
700 1 $aSOUZA, T. C, de
773 $tAustralian Journal of Crop Science$gv. 16, n. 2, p. 208-215, 2022.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Unidades Centrais. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
12/06/1997 |
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Data da última atualização: |
12/06/1997 |
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Autoria: |
INFELD, J. A.; SILVEIRA JUNIOR, P.; ZONTA, E. P. |
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Afiliação: |
UEPAE de Pelotas. |
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Título: |
Influencia de epoca de semeadura na producao de seis cultivares de arroz irrigado. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.22, n.6, p.599-606, jun.1987. |
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Idioma: |
Português |
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Conteúdo: |
Foram semeadas, em seis épocas, de primeiro de outubro a 15 de dezembro, nos anos de 1978, 1979, 1980 e 1981, seis cultivares de arroz irrigado (Oryza sativa L.): Bluebelle, Lebormet, EEA 406, IRGA 408, BR-IRGA 409 e BR-IRGA 410. 0 ensaio visava verificar as variações de produção em função de épocas de semeadura e entre cultivares, caracterizando o curto período de semeadura em que as cultivares de arroz respondem com a mais alta produtividade, no sul do Brasil. A cultivar BR-IRGA 410 apresentou uma produtividade média significativamente maior do que as demais, (5.420 kg/ha), o mesmo ocorrendo com as cultivares BR-IRGA 409 (5.010 kg/ha) e IRGA 408 (4.970 kg/ha) em relação às cultivares EEA 406 (4.590 kg/ha:), Bluebelle (4.450 kg/ha) e Lebonnet (4.340 kg/ha). No ajustamento da curva das produções média, em função de épocas de semeadura, determinou-se como ponto de produção máxima (5,42) a semeadura de 1? de novembro, e, como período mais favorável, o período de 16 de outubro a 16 de novembro, para a parte sul do Rio Grande do Sul.
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Palavras-Chave: |
Bluebelle; BR-IRGA 4 10; BR-IRGA 409; BR-IRGA 410; EEA 406; IRGA 408; Lebonett; Lebormet. |
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Thesagro: |
Arroz; Oryza Sativa. |
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Thesaurus NAL: |
rice. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01798naa a2200277 a 4500
001 1091782
005 1997-06-12
008 1987 bl uuuu u00u1 u #d
100 1 $aINFELD, J. A.
245 $aInfluencia de epoca de semeadura na producao de seis cultivares de arroz irrigado.
260 $c1987
520 $aForam semeadas, em seis épocas, de primeiro de outubro a 15 de dezembro, nos anos de 1978, 1979, 1980 e 1981, seis cultivares de arroz irrigado (Oryza sativa L.): Bluebelle, Lebormet, EEA 406, IRGA 408, BR-IRGA 409 e BR-IRGA 410. 0 ensaio visava verificar as variações de produção em função de épocas de semeadura e entre cultivares, caracterizando o curto período de semeadura em que as cultivares de arroz respondem com a mais alta produtividade, no sul do Brasil. A cultivar BR-IRGA 410 apresentou uma produtividade média significativamente maior do que as demais, (5.420 kg/ha), o mesmo ocorrendo com as cultivares BR-IRGA 409 (5.010 kg/ha) e IRGA 408 (4.970 kg/ha) em relação às cultivares EEA 406 (4.590 kg/ha:), Bluebelle (4.450 kg/ha) e Lebonnet (4.340 kg/ha). No ajustamento da curva das produções média, em função de épocas de semeadura, determinou-se como ponto de produção máxima (5,42) a semeadura de 1? de novembro, e, como período mais favorável, o período de 16 de outubro a 16 de novembro, para a parte sul do Rio Grande do Sul.
650 $arice
650 $aArroz
650 $aOryza Sativa
653 $aBluebelle
653 $aBR-IRGA 4 10
653 $aBR-IRGA 409
653 $aBR-IRGA 410
653 $aEEA 406
653 $aIRGA 408
653 $aLebonett
653 $aLebormet
700 1 $aSILVEIRA JUNIOR, P.
700 1 $aZONTA, E. P.
773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.22, n.6, p.599-606, jun.1987.
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Embrapa Unidades Centrais (AI-SEDE) |
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