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Registro Completo |
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
27/02/2024 |
Data da última atualização: |
27/02/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
BARROS, J. R. A.; SANTOS, T. C. dos; SILVA, E. G. F.; SILVA, W. O. da; GUIMARÃES, M. J. M.; ANGELOTTI, F. |
Afiliação: |
JULIANE RAFAELE ALVES BARROS, Foundation for the Support of Science and Technology of the State of Pernambuco, Recife, PE; TATIANE CEZARIO DOS SANTOS, State University of Feira de Santana, Feira de Santana, BA; ELIOENAI GOMES FREIRE SILVA; WESLLEY OLIVEIRA DA SILVA, State University of Feira de Santana, Feira de Santana, BA; MIGUEL JULIO MACHADO GUIMARÃES, Federal Institute of Education, Science and Technology of Maranhão, São Raimundo das Mangabeiras, MA; FRANCISLENE ANGELOTTI, CPATSA. |
Título: |
Pollen viability, and the photosynthetic and enzymatic responses of cowpea (Vigna unguiculata (L.) Walp., Fabaceae) in the face of rising air temperature: a problem for food safety. |
Ano de publicação: |
2024 |
Fonte/Imprenta: |
Agronomy, v. 14, 463, 2024. |
DOI: |
https://doi.org/10.3390/agronomy14030463 |
Idioma: |
Inglês |
Conteúdo: |
Rising temperature affects agricultural production, causing food insecurity. Thus, the objective of this study was to evaluate how increased temperature influences pollen viability, photosynthetic and enzymatic responses, and their consequences on the final yield of cowpea cultivars. The cultivars BRS Acauã, BRS Guariba, BRS Gurguéia, and BRS Pajeú were used, kept in growth chambers under two temperature regimes: 24.8–30.8–37.8 ◦C and 20–26–33 ◦C. The cultivars BRS Acauã, BRS Guariba, and BRS Pajeú showed prolonged flowering and greater flower abortion, at 23.58%, 34.71%, and 25.55%, respectively, under an increase of 4.8 ◦C in temperature. This increase also reduced the viability of BRS Acauã and BRS Pajeú pollen by 34 and 7%, respectively. Heating increased stomatal opening and transpiration but reduced chlorophyll content. The enzymatic response varied according to cultivars and temperature. Changes in photosynthetic and enzymatic activities contribute to reducing pollen viability and productivity. BRS Acauã was the most affected, with an 82% reduction in the number of seeds and a 70% reduction in production. BRS Gurguéia maintained its production, even with an increase of 4.8 ◦C, and can be selected as a cultivar with the potential to tolerate high temperatures as it maintained pollen viability, with less flower abortion, with the synchrony of physiological and biochemical responses and, consequently, greater production. |
Palavras-Chave: |
Atividade fisiológica; BRS Acauã; BRS Guariba; BRS Gurguéia; BRS Pajeú; Estresse oxidativo; Estresse por calor; Feijão-caupi; Temperatura do ar; Viabilidade do pollen. |
Thesagro: |
Feijão; Produção Agrícola; Segurança Alimentar; Vigna Unguiculata. |
Thesaurus Nal: |
Cowpeas; Food safety; Heat stress; Oxidative stress. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1162315/1/Pollen-Viability-and-the-Photosynthetic-and-Enzymatic-2024.pdf
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Marc: |
LEADER 02726naa a2200409 a 4500 001 2162315 005 2024-02-27 008 2024 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.3390/agronomy14030463$2DOI 100 1 $aBARROS, J. R. A. 245 $aPollen viability, and the photosynthetic and enzymatic responses of cowpea (Vigna unguiculata (L.) Walp., Fabaceae) in the face of rising air temperature$ba problem for food safety.$h[electronic resource] 260 $c2024 520 $aRising temperature affects agricultural production, causing food insecurity. Thus, the objective of this study was to evaluate how increased temperature influences pollen viability, photosynthetic and enzymatic responses, and their consequences on the final yield of cowpea cultivars. The cultivars BRS Acauã, BRS Guariba, BRS Gurguéia, and BRS Pajeú were used, kept in growth chambers under two temperature regimes: 24.8–30.8–37.8 ◦C and 20–26–33 ◦C. The cultivars BRS Acauã, BRS Guariba, and BRS Pajeú showed prolonged flowering and greater flower abortion, at 23.58%, 34.71%, and 25.55%, respectively, under an increase of 4.8 ◦C in temperature. This increase also reduced the viability of BRS Acauã and BRS Pajeú pollen by 34 and 7%, respectively. Heating increased stomatal opening and transpiration but reduced chlorophyll content. The enzymatic response varied according to cultivars and temperature. Changes in photosynthetic and enzymatic activities contribute to reducing pollen viability and productivity. BRS Acauã was the most affected, with an 82% reduction in the number of seeds and a 70% reduction in production. BRS Gurguéia maintained its production, even with an increase of 4.8 ◦C, and can be selected as a cultivar with the potential to tolerate high temperatures as it maintained pollen viability, with less flower abortion, with the synchrony of physiological and biochemical responses and, consequently, greater production. 650 $aCowpeas 650 $aFood safety 650 $aHeat stress 650 $aOxidative stress 650 $aFeijão 650 $aProdução Agrícola 650 $aSegurança Alimentar 650 $aVigna Unguiculata 653 $aAtividade fisiológica 653 $aBRS Acauã 653 $aBRS Guariba 653 $aBRS Gurguéia 653 $aBRS Pajeú 653 $aEstresse oxidativo 653 $aEstresse por calor 653 $aFeijão-caupi 653 $aTemperatura do ar 653 $aViabilidade do pollen 700 1 $aSANTOS, T. C. dos 700 1 $aSILVA, E. G. F. 700 1 $aSILVA, W. O. da 700 1 $aGUIMARÃES, M. J. M. 700 1 $aANGELOTTI, F. 773 $tAgronomy$gv. 14, 463, 2024.
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Embrapa Semiárido (CPATSA) |
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Biblioteca(s): |
Embrapa Pecuária Sul. |
Data corrente: |
03/01/2019 |
Data da última atualização: |
03/01/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 3 |
Autoria: |
FREITAS, A. P. de; GUTERRES, M. X.; LAMPERT, V. do N.; SILVA, A. H. S. da; BARCELLOS, J. O. J.; MARQUES, P. R. |
Afiliação: |
Adriano Pinto de Freitas, UNIPAMPA; Marcelo Xavier Guterres, UNIPAMPA; VINICIUS DO NASCIMENTO LAMPERT, CPPSUL; Ana Helena Soares da Silva, UFRGS; Júlio Otavio Jardim Barcellos, UFRGS; Pedro Rocha Marques, UFRGS. |
Título: |
Aplicação de método de seleção de variáveis em um modelo DEA na produção de bovinos de corte. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Engevista, v. 19, n. 4, p. 881-889, out. 2017. |
Idioma: |
Português |
Conteúdo: |
Nonparametric frontier estimation assesses relative efficiency of production units. The method with a larger scope in the literature is Data Envelopment Analysis (DEA). Efficiency analysis evaluated by DEA demands special attention when selecting the variables of the model. This paper incorporated a reference matrix as preliminary step in the implementation of a variable selection method, to measure the efficiency of beef cattle production systems. With the assistance of specialists, this matrix aims refine a variable selection method, to reduce or put out the selection of worthless variables to a future efficiency analysis. Proposed method for DEA variables selection was scoped in eight cities in the western region of Rio Grande do Sul state, to evaluate the performance of complete lifecycle beef cattle production systems. The variables resulting from the application demonstrated an alignment with greatest zootechnics importance points for beef cattle production systems efficiency estimation, reproductive, growth and survival characteristics of the animals in the production system. This method demonstrated to be important at supplementing the classical method of reduction and elimination of variables, by attending specialists judgment on the preliminary step. |
Palavras-Chave: |
Análise por envoltória de dados. |
Thesagro: |
Bovinocultura; Gado de Corte. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/189729/1/ENGEVISTA.pdf
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Marc: |
LEADER 01956naa a2200217 a 4500 001 2102976 005 2019-01-03 008 2017 bl uuuu u00u1 u #d 100 1 $aFREITAS, A. P. de 245 $aAplicação de método de seleção de variáveis em um modelo DEA na produção de bovinos de corte.$h[electronic resource] 260 $c2017 520 $aNonparametric frontier estimation assesses relative efficiency of production units. The method with a larger scope in the literature is Data Envelopment Analysis (DEA). Efficiency analysis evaluated by DEA demands special attention when selecting the variables of the model. This paper incorporated a reference matrix as preliminary step in the implementation of a variable selection method, to measure the efficiency of beef cattle production systems. With the assistance of specialists, this matrix aims refine a variable selection method, to reduce or put out the selection of worthless variables to a future efficiency analysis. Proposed method for DEA variables selection was scoped in eight cities in the western region of Rio Grande do Sul state, to evaluate the performance of complete lifecycle beef cattle production systems. The variables resulting from the application demonstrated an alignment with greatest zootechnics importance points for beef cattle production systems efficiency estimation, reproductive, growth and survival characteristics of the animals in the production system. This method demonstrated to be important at supplementing the classical method of reduction and elimination of variables, by attending specialists judgment on the preliminary step. 650 $aBovinocultura 650 $aGado de Corte 653 $aAnálise por envoltória de dados 700 1 $aGUTERRES, M. X. 700 1 $aLAMPERT, V. do N. 700 1 $aSILVA, A. H. S. da 700 1 $aBARCELLOS, J. O. J. 700 1 $aMARQUES, P. R. 773 $tEngevista$gv. 19, n. 4, p. 881-889, out. 2017.
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