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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amapá. Para informações adicionais entre em contato com cpafap.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
06/11/2023 |
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Data da última atualização: |
06/11/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MIRANDA, Z. P.; ZUCARATTO, R.; PORTELA, R. de C. Q.; GUEDES, M. C. |
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Afiliação: |
ZENAIDE PALHETA MIRANDA, UNIVERSIDADE DO ESTADO DO AMAPÁ; RODRIGO ZUCARATTO, UNIVERSIDADE DO ESTADO DO RIO DE JANEIRO; RITA DE CÁSSIA QUITETE PORTELA, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO; MARCELINO CARNEIRO GUEDES, CPAF-AP. |
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Título: |
Demography of Mora paraensis (Ducke) Ducke in the estuarine floodplain forests of the Amazon river. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Oecologia Australis, v. 27, n. 3, p. 280-293, 2023. |
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DOI: |
http://doi.org/10.4257/oeco.2023.2703.03 |
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Idioma: |
Inglês |
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Conteúdo: |
Trees of Mora paraensis (known as pracuúba) accumulate most of the commercial volume of the estuarine floodplain forests in the Amazon River, which are being pressed by disordered logging. To verify if their demographic rates are balanced and vary according to their proximity to the Amazon River, we analyzed the population dynamics of this species for 5 years in 240 plots of 10 m x 25 m. Half of the plots were in areas near the Amazon River and half were in more distant areas (3 ha in each site). The annual measured DBH from 2011 to 2015 was used to construct integral projection models (IPMs), based on the variation in the size of individual trees in that period. Tree survival was high in both populations, but only the population closest to the Amazon River showed mortality in trees of greater than 50 cm DBH. This population has a higher pracuúba density and basal area, but a smaller diameter average because there is a greater proportion and predominance of smaller trees. Both the population near and distant from the Amazon River exhibited increasing population growth rates in all sampling intervals. Population growth rates (λ) ranged from 1.02 to 1.25. The survival of M. paraensis populations showed a strong dependence on size and the distance of the Amazon River changes the density and demography of specie in estuarine forests population increases were maintained throughout the evaluation period, with no atypical year causing shrinkage in the populations. |
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Palavras-Chave: |
Elasticity; Integral projection model (IPM); Survival. |
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Thesaurus Nal: |
Lowland forests; Population dynamics. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02213naa a2200229 a 4500
001 2157840
005 2023-11-06
008 2023 bl uuuu u00u1 u #d
024 7 $ahttp://doi.org/10.4257/oeco.2023.2703.03$2DOI
100 1 $aMIRANDA, Z. P.
245 $aDemography of Mora paraensis (Ducke) Ducke in the estuarine floodplain forests of the Amazon river.$h[electronic resource]
260 $c2023
520 $aTrees of Mora paraensis (known as pracuúba) accumulate most of the commercial volume of the estuarine floodplain forests in the Amazon River, which are being pressed by disordered logging. To verify if their demographic rates are balanced and vary according to their proximity to the Amazon River, we analyzed the population dynamics of this species for 5 years in 240 plots of 10 m x 25 m. Half of the plots were in areas near the Amazon River and half were in more distant areas (3 ha in each site). The annual measured DBH from 2011 to 2015 was used to construct integral projection models (IPMs), based on the variation in the size of individual trees in that period. Tree survival was high in both populations, but only the population closest to the Amazon River showed mortality in trees of greater than 50 cm DBH. This population has a higher pracuúba density and basal area, but a smaller diameter average because there is a greater proportion and predominance of smaller trees. Both the population near and distant from the Amazon River exhibited increasing population growth rates in all sampling intervals. Population growth rates (λ) ranged from 1.02 to 1.25. The survival of M. paraensis populations showed a strong dependence on size and the distance of the Amazon River changes the density and demography of specie in estuarine forests population increases were maintained throughout the evaluation period, with no atypical year causing shrinkage in the populations.
650 $aLowland forests
650 $aPopulation dynamics
653 $aElasticity
653 $aIntegral projection model (IPM)
653 $aSurvival
700 1 $aZUCARATTO, R.
700 1 $aPORTELA, R. de C. Q.
700 1 $aGUEDES, M. C.
773 $tOecologia Australis$gv. 27, n. 3, p. 280-293, 2023.
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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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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Circulação/Nível: |
B - 1 |
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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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Embrapa Milho e Sorgo (CNPMS) |
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