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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
17/04/2000 |
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Data da última atualização: |
15/10/2004 |
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Autoria: |
FARIAS, J. R. B.; NEUMAIER, N.; NEPOMUCENO, A. L.; BORDINGNON, J. R. |
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Título: |
Effects of water deficits during different phases of soybean crop development. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: WORLD SOYBEAN RESEARCH CONFERENCE, 6., 1999, Chicago. Proceedings: invited and contributed papers and posters. Chicago: University of Illinois / Soybean Research & Development Council, 1999. |
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Páginas: |
p.601. |
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Idioma: |
Inglês |
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Conteúdo: |
The variability in yield and grain quality among years in the same location and sowing time are intimately related to the water availability. Water deficit effects on yields are variable as a function of intensity and duration of the deficit and the stage of plant development. The objective of this work was to compare yield, its components and oil and grain protein content of plants submitted to water deficits during the vegetative and reproductive periods to the ones produced without water restrictions (irrigated). The experiment was carried out in the field at the Experimental Station of EMBRAPA's National Soybean Research Center, in Londrina, PR, Brazil. The soil moisture was monitored with tensiometers and a neutron probe. Rainfall over the plots was controlled with mobile shelters that automatically covered/stopped the plots when the rain started/stopped. When necessary, irrigation was supplied according to the treatments to attend crop water needs. Yield reductions of 75% were observed when water deficits were applied during the reproductive period as compared to treatments without water restrictions. With water deficits during the vegetative period, the reduction in yield was 55%. The lack of water during the reproductive phase caused a smaller number of seeds per pod and a larger seed weight. These variables were not significantly different when compared to the two other treatments (water deficit during the vegetative phase and irrigated). The number of pods per plant was higher without water restriction and lower with water deficit during the reproductive phase. The higher grain oil contents were observed in treatments with no water restriction and the highest grain protein contents were found in plants submitted to water deficit during the reproductive phase. Grain protein content was lower in plants without water restriction. Water deficit during the vegetative phase produced the lowest grain oil content. This was observed in all cultivars tested. It can be concluded that, although soybean fields grown under low water availability during the reproductive period produce reduced yields, the grains have higher protein content, and can be directed to specific markets. MenosThe variability in yield and grain quality among years in the same location and sowing time are intimately related to the water availability. Water deficit effects on yields are variable as a function of intensity and duration of the deficit and the stage of plant development. The objective of this work was to compare yield, its components and oil and grain protein content of plants submitted to water deficits during the vegetative and reproductive periods to the ones produced without water restrictions (irrigated). The experiment was carried out in the field at the Experimental Station of EMBRAPA's National Soybean Research Center, in Londrina, PR, Brazil. The soil moisture was monitored with tensiometers and a neutron probe. Rainfall over the plots was controlled with mobile shelters that automatically covered/stopped the plots when the rain started/stopped. When necessary, irrigation was supplied according to the treatments to attend crop water needs. Yield reductions of 75% were observed when water deficits were applied during the reproductive period as compared to treatments without water restrictions. With water deficits during the vegetative period, the reduction in yield was 55%. The lack of water during the reproductive phase caused a smaller number of seeds per pod and a larger seed weight. These variables were not significantly different when compared to the two other treatments (water deficit during the vegetative phase and irrigated). The number of pods per plan... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Deficit de agua no solo; Soybean. |
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Thesagro: |
Deficiência Hídrica; Soja. |
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Thesaurus Nal: |
Brazil; soil water deficit. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03036naa a2200253 a 4500
001 1461738
005 2004-10-15
008 1999 bl uuuu u00u1 u #d
100 1 $aFARIAS, J. R. B.
245 $aEffects of water deficits during different phases of soybean crop development.
260 $c1999
300 $ap.601.
520 $aThe variability in yield and grain quality among years in the same location and sowing time are intimately related to the water availability. Water deficit effects on yields are variable as a function of intensity and duration of the deficit and the stage of plant development. The objective of this work was to compare yield, its components and oil and grain protein content of plants submitted to water deficits during the vegetative and reproductive periods to the ones produced without water restrictions (irrigated). The experiment was carried out in the field at the Experimental Station of EMBRAPA's National Soybean Research Center, in Londrina, PR, Brazil. The soil moisture was monitored with tensiometers and a neutron probe. Rainfall over the plots was controlled with mobile shelters that automatically covered/stopped the plots when the rain started/stopped. When necessary, irrigation was supplied according to the treatments to attend crop water needs. Yield reductions of 75% were observed when water deficits were applied during the reproductive period as compared to treatments without water restrictions. With water deficits during the vegetative period, the reduction in yield was 55%. The lack of water during the reproductive phase caused a smaller number of seeds per pod and a larger seed weight. These variables were not significantly different when compared to the two other treatments (water deficit during the vegetative phase and irrigated). The number of pods per plant was higher without water restriction and lower with water deficit during the reproductive phase. The higher grain oil contents were observed in treatments with no water restriction and the highest grain protein contents were found in plants submitted to water deficit during the reproductive phase. Grain protein content was lower in plants without water restriction. Water deficit during the vegetative phase produced the lowest grain oil content. This was observed in all cultivars tested. It can be concluded that, although soybean fields grown under low water availability during the reproductive period produce reduced yields, the grains have higher protein content, and can be directed to specific markets.
650 $aBrazil
650 $asoil water deficit
650 $aDeficiência Hídrica
650 $aSoja
653 $aBrasil
653 $aDeficit de agua no solo
653 $aSoybean
700 1 $aNEUMAIER, N.
700 1 $aNEPOMUCENO, A. L.
700 1 $aBORDINGNON, J. R.
773 $tIn: WORLD SOYBEAN RESEARCH CONFERENCE, 6., 1999, Chicago. Proceedings: invited and contributed papers and posters. Chicago: University of Illinois / Soybean Research & Development Council, 1999.
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Registro original: |
Embrapa Soja (CNPSO) |
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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
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Biblioteca(s): |
Embrapa Hortaliças. |
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Data corrente: |
14/10/2022 |
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Data da última atualização: |
14/10/2022 |
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Tipo da produção científica: |
Nota Técnica/Nota Científica |
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Autoria: |
NAKASU, E. Y. T.; SILVA, G.; MONTES, S. M. N. M.; MELLO, A. F. S. |
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Afiliação: |
ERICH YUKIO TEMPEL NAKASU, CNPH; GABRIELA SILVA, AGÊNCIA PAULISTA DE TECNOLOGIA DOS AGRONEGÓCIOS; SÔNIA M. N. M. MONTES, AGÊNCIA PAULISTA DE TECNOLOGIA DOS AGRONEGÓCIOS; ALEXANDRE FURTADO SILVEIRA MELLO, CNPH. |
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Título: |
Virome analysis of sweetpotato in three Brazilian regions using high-throughput sequencing. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Tropical Plant Pathology, Oct. 2022. |
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DOI: |
https://doi.org/10.1007/s40858-022-00532-x |
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Idioma: |
Inglês |
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Conteúdo: |
Sweet potato (Ipomoea batatas (L.) Lam.) is a highly nutritious food crop that suffers severe yield losses due to viral diseases. These are unintentionally spread mainly by vegetative propagation techniques commonly used by farmers. Virus indexing of vine cuttings (slips) coupled with tools specifically developed for identification of the main viruses is therefore essential to avoid disease outbreaks. In this work, we assessed the viral diversity in sweetpotatoes collected in some of the main producing areas in Brazil. The cuttings were grafted onto Ipomoea setosa Ker Gawl. prior to being subjected to ELISA for ten different viruses. Total DNA and RNA were also extracted from sweetpotato and I. setosa leaves for high-throughput sequencing (HTS) on an Illumina platform. Using this HTS strategy, nine viral species known to infect sweetpotatoes were identified, being seven of those species also identified in grafted I. setosa, two species identified exclusively in sweetpotato and two exclusively on I. setosa. From the ten different viruses tested by ELISA, six were identified in the samples evaluated. The generated data will be useful for virus indexing of sweetpotato as well as for virus resistance screening in sweetpotato breeding programs. |
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Thesagro: |
Batata Doce; Ipomoea Batatas; Variedade Resistente; Vírus. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 01914naa a2200217 a 4500
001 2147336
005 2022-10-14
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s40858-022-00532-x$2DOI
100 1 $aNAKASU, E. Y. T.
245 $aVirome analysis of sweetpotato in three Brazilian regions using high-throughput sequencing.$h[electronic resource]
260 $c2022
520 $aSweet potato (Ipomoea batatas (L.) Lam.) is a highly nutritious food crop that suffers severe yield losses due to viral diseases. These are unintentionally spread mainly by vegetative propagation techniques commonly used by farmers. Virus indexing of vine cuttings (slips) coupled with tools specifically developed for identification of the main viruses is therefore essential to avoid disease outbreaks. In this work, we assessed the viral diversity in sweetpotatoes collected in some of the main producing areas in Brazil. The cuttings were grafted onto Ipomoea setosa Ker Gawl. prior to being subjected to ELISA for ten different viruses. Total DNA and RNA were also extracted from sweetpotato and I. setosa leaves for high-throughput sequencing (HTS) on an Illumina platform. Using this HTS strategy, nine viral species known to infect sweetpotatoes were identified, being seven of those species also identified in grafted I. setosa, two species identified exclusively in sweetpotato and two exclusively on I. setosa. From the ten different viruses tested by ELISA, six were identified in the samples evaluated. The generated data will be useful for virus indexing of sweetpotato as well as for virus resistance screening in sweetpotato breeding programs.
650 $aBatata Doce
650 $aIpomoea Batatas
650 $aVariedade Resistente
650 $aVírus
700 1 $aSILVA, G.
700 1 $aMONTES, S. M. N. M.
700 1 $aMELLO, A. F. S.
773 $tTropical Plant Pathology, Oct. 2022.
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