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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
10/11/2006 |
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Data da última atualização: |
14/10/2011 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
WANSER, A. F.; ANGHINONI, I.; MEURER, E. J.; MUNDSTOCK, C. M.; SILVA, P. R. F. da. |
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Afiliação: |
Epagri |
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Título: |
Velocidade de mineralizacao de nitrogenio de culturas de cobertura do solo em semeadura direta. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Agropecuaria Catarinense, Florianopolis, v. 19, n. 2, p. 75-79, jul. 2006. |
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Idioma: |
Português |
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Conteúdo: |
Conduziu-se um experimento em Eldorado do Sul, RS, em 2001, em Argissolo Vermelho distrofico, para avaliar o potencial de fornecimento de N em oito coberturas do solo (pousio invernal, aveia preta, ervilhaca comum, nabo forrageiro, aveia+nabo, ervilhaca+nabo+ervilhaca) para o desenvolvimento inicial do milho. O potencial de fornecimento de N foi estimado atraves da taxa de decomposicao da fitomassa das culturas de cobertura e da analise dos teores de N mineral do solo. O nabo forrageiro e a ervilhaca comum, diferentemente da aveia, proporcionaram maior leberacao de N durante os primeiros 58 dias de decomposicao, refletindo em maiores niveis de N-NO³ - no solo no final deste periodo. |
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Palavras-Chave: |
Avena strigosa; Cobertura do solo; Liberacao de Nitrogenio; Manejo integrado; Raphanus sativus; Semeadura direta; Vicia sativa. |
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Categoria do assunto: |
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Marc: |
LEADER 01447naa a2200253 a 4500
001 1049714
005 2011-10-14
008 2006 bl uuuu u00u1 u #d
100 1 $aWANSER, A. F.
245 $aVelocidade de mineralizacao de nitrogenio de culturas de cobertura do solo em semeadura direta.
260 $c2006
520 $aConduziu-se um experimento em Eldorado do Sul, RS, em 2001, em Argissolo Vermelho distrofico, para avaliar o potencial de fornecimento de N em oito coberturas do solo (pousio invernal, aveia preta, ervilhaca comum, nabo forrageiro, aveia+nabo, ervilhaca+nabo+ervilhaca) para o desenvolvimento inicial do milho. O potencial de fornecimento de N foi estimado atraves da taxa de decomposicao da fitomassa das culturas de cobertura e da analise dos teores de N mineral do solo. O nabo forrageiro e a ervilhaca comum, diferentemente da aveia, proporcionaram maior leberacao de N durante os primeiros 58 dias de decomposicao, refletindo em maiores niveis de N-NO³ - no solo no final deste periodo.
653 $aAvena strigosa
653 $aCobertura do solo
653 $aLiberacao de Nitrogenio
653 $aManejo integrado
653 $aRaphanus sativus
653 $aSemeadura direta
653 $aVicia sativa
700 1 $aANGHINONI, I.
700 1 $aMEURER, E. J.
700 1 $aMUNDSTOCK, C. M.
700 1 $aSILVA, P. R. F. da.
773 $tAgropecuaria Catarinense, Florianopolis$gv. 19, n. 2, p. 75-79, jul. 2006.
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
25/01/2021 |
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Data da última atualização: |
25/01/2021 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
PIVETA, L. B.; BURGOS, N. R.; NOLDIN, J. A.; VIANA, V.; OLIVEIRA, C.; LAMEGO, F. P.; AVILA, L. |
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Título: |
Molecular and Physiological Responses of Rice and Weedy Rice to Heat and Drought Stress. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Agriculture, Basel, Switzerland, v. 11, n. 1, p. 1-21, 2021. |
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Idioma: |
Inglês |
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Conteúdo: |
Rice is the staple food for about half of the world population. Rice grain yield and quality are affected by climatic changes. Arguably, rice cultivars? genetic diversity is diminished from decades of breeding using narrow germplasm, requiring introgressions from other Oryza species, weedy or wild. Weedy rice has high genetic diversity, which is an essential resource for rice crop improvement. Here, we analyzed the phenotypic, physiological, and molecular profiles of two rice cultivars (IRGA 424 and SCS119 Rubi) and five weedy rice (WR), from five different Brazilian regions, in response to heat and drought stress. Drought and heat stress affected the phenotype and photosynthetic parameters in different ways in rice and WR genotypes. A WR from Northern Brazil yielded better under heat stress than the non-stressed check. Drought stress upregulated HSF7A while heat stress upregulated HSF2a. HSP74.8, HSP80.2, and HSP24.1 were upregulated in both conditions. Based on all evaluated traits, we hypothesized that in drought conditions increasing HSFA7 expression is related to tiller number and that increase WUE (water use efficiency) and HSFA2a expression are associated with yield. In heat conditions, Gs (stomatal conductance) and E?s increases may be related to plant height; tiller number is inversely associated with HSPs expression, and chlorophyll content and Ci (intercellular CO2 concentration) may be related to yield. Based on morphology, physiology, and gene regulation in heat and drought stress, we can discriminate genotypes that perform well under these stress conditions and utilize such genotypes as a source of genetic diversity for rice breeding. MenosRice is the staple food for about half of the world population. Rice grain yield and quality are affected by climatic changes. Arguably, rice cultivars? genetic diversity is diminished from decades of breeding using narrow germplasm, requiring introgressions from other Oryza species, weedy or wild. Weedy rice has high genetic diversity, which is an essential resource for rice crop improvement. Here, we analyzed the phenotypic, physiological, and molecular profiles of two rice cultivars (IRGA 424 and SCS119 Rubi) and five weedy rice (WR), from five different Brazilian regions, in response to heat and drought stress. Drought and heat stress affected the phenotype and photosynthetic parameters in different ways in rice and WR genotypes. A WR from Northern Brazil yielded better under heat stress than the non-stressed check. Drought stress upregulated HSF7A while heat stress upregulated HSF2a. HSP74.8, HSP80.2, and HSP24.1 were upregulated in both conditions. Based on all evaluated traits, we hypothesized that in drought conditions increasing HSFA7 expression is related to tiller number and that increase WUE (water use efficiency) and HSFA2a expression are associated with yield. In heat conditions, Gs (stomatal conductance) and E?s increases may be related to plant height; tiller number is inversely associated with HSPs expression, and chlorophyll content and Ci (intercellular CO2 concentration) may be related to yield. Based on morphology, physiology, and gene regulation in heat... Mostrar Tudo |
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Palavras-Chave: |
Genetic diversity; Heat shock proteins; Photosynthesis. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02343naa a2200229 a 4500
001 1130554
005 2021-01-25
008 2021 bl uuuu u00u1 u #d
100 1 $aPIVETA, L. B.
245 $aMolecular and Physiological Responses of Rice and Weedy Rice to Heat and Drought Stress.$h[electronic resource]
260 $c2021
520 $aRice is the staple food for about half of the world population. Rice grain yield and quality are affected by climatic changes. Arguably, rice cultivars? genetic diversity is diminished from decades of breeding using narrow germplasm, requiring introgressions from other Oryza species, weedy or wild. Weedy rice has high genetic diversity, which is an essential resource for rice crop improvement. Here, we analyzed the phenotypic, physiological, and molecular profiles of two rice cultivars (IRGA 424 and SCS119 Rubi) and five weedy rice (WR), from five different Brazilian regions, in response to heat and drought stress. Drought and heat stress affected the phenotype and photosynthetic parameters in different ways in rice and WR genotypes. A WR from Northern Brazil yielded better under heat stress than the non-stressed check. Drought stress upregulated HSF7A while heat stress upregulated HSF2a. HSP74.8, HSP80.2, and HSP24.1 were upregulated in both conditions. Based on all evaluated traits, we hypothesized that in drought conditions increasing HSFA7 expression is related to tiller number and that increase WUE (water use efficiency) and HSFA2a expression are associated with yield. In heat conditions, Gs (stomatal conductance) and E?s increases may be related to plant height; tiller number is inversely associated with HSPs expression, and chlorophyll content and Ci (intercellular CO2 concentration) may be related to yield. Based on morphology, physiology, and gene regulation in heat and drought stress, we can discriminate genotypes that perform well under these stress conditions and utilize such genotypes as a source of genetic diversity for rice breeding.
653 $aGenetic diversity
653 $aHeat shock proteins
653 $aPhotosynthesis
700 1 $aBURGOS, N. R.
700 1 $aNOLDIN, J. A.
700 1 $aVIANA, V.
700 1 $aOLIVEIRA, C.
700 1 $aLAMEGO, F. P.
700 1 $aAVILA, L.
773 $tAgriculture, Basel, Switzerland$gv. 11, n. 1, p. 1-21, 2021.
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