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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Ocidental. Para informações adicionais entre em contato com cpaa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental; Embrapa Arroz e Feijão; Embrapa Soja. |
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Data corrente: |
04/02/2011 |
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Data da última atualização: |
25/07/2011 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FAGERIA, N. K.; MOREIRA, A. |
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Afiliação: |
NAND KUMAR FAGERIA, CNPAF; ADONIS MOREIRA, CPAA. |
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Título: |
The role of mineral nutrition on root growth of crop plants. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Advances in Agronomy, New York, v. 110, p. 251-331, 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
Agriculture is going through a profound revolution worldwide due to increasing world demand for food, higher costs of energy and other inputs, environmental pollution problems, and instability of cropping systems. In this context, knowledge of factors that affect root development is fundamental to improving nutrient cycling and uptake in soil?plant systems. Roots are important organs that supply water, nutrients, hormones, and mechanical support (anchorage) to crop plants and consequently affect economic yields. In addition, roots improve soil organic matter (OM) by contributing to soil pools of organic carbon (C), nitrogen (N), and microbial biomass. Root-derived soil C is retained and forms more stable soil aggregates than shoot-derived soil C. Although roots normally contribute only 10?20% of the total plant weight, a well-developed root system is essential for healthy plant growth and development. Root growth of plants is controlled genetically, but it is also influenced by environmental factors. Mineral nutrition is an important factor influencing the growth of plant roots, but detailed information on nutritional effects is limited, primarily because roots are half-hidden organs that are very difficult to separate from soil. As a result, it is difficult to measure the effect of biotic and abiotic factors on root growth under field conditions. Root growth is mainly measured in terms of root density, length, and weight. Root dry weight is often better related to crop yields than is root length or density. The response of root growth to chemical fertilization is similar to that of shoot growth; however, the magnitude of the response may differ. In nutrient-deficient soils, root weight often increases in a quadratic manner with the addition of chemical fertilizers. Increasing nutrient supplies in the soil may also decrease root length but increase root weight in a quadratic fashion. Roots with adequate nutrient supplies may also have more root hairs than nutrient-deficient roots. This may result in greater uptake of water and nutrients by roots well supplied with essential plant nutrients, compared with roots grown in nutrient-deficient soils. Under favorable conditions, a major part of the root system is usually found in the top 20 cm of soil. Maximum root growth is generally achieved at flowering in cereals and at pod-setting in legumes. Genotypic variations are often found in the response of root growth to nutrient applications, and the possibility of modifying root system response to soil properties offers exciting prospects for future improvements in crop yields. Rooting pattern in crop plants is under multi- or polygenic control, and breeding programs can be used to improve root system properties for environments where drought is a problem. The use of crop species and cultivars tolerant to biotic and abiotic stresses, as well as the use of appropriate cultural practices, can improve plant root system function under favorable and unfavorable environmental conditions. MenosAgriculture is going through a profound revolution worldwide due to increasing world demand for food, higher costs of energy and other inputs, environmental pollution problems, and instability of cropping systems. In this context, knowledge of factors that affect root development is fundamental to improving nutrient cycling and uptake in soil?plant systems. Roots are important organs that supply water, nutrients, hormones, and mechanical support (anchorage) to crop plants and consequently affect economic yields. In addition, roots improve soil organic matter (OM) by contributing to soil pools of organic carbon (C), nitrogen (N), and microbial biomass. Root-derived soil C is retained and forms more stable soil aggregates than shoot-derived soil C. Although roots normally contribute only 10?20% of the total plant weight, a well-developed root system is essential for healthy plant growth and development. Root growth of plants is controlled genetically, but it is also influenced by environmental factors. Mineral nutrition is an important factor influencing the growth of plant roots, but detailed information on nutritional effects is limited, primarily because roots are half-hidden organs that are very difficult to separate from soil. As a result, it is difficult to measure the effect of biotic and abiotic factors on root growth under field conditions. Root growth is mainly measured in terms of root density, length, and weight. Root dry weight is often better related to crop yiel... Mostrar Tudo |
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Palavras-Chave: |
Nutrição mineral. |
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Thesagro: |
Nutrição vegetal; Planta; Produção vegetal; Raíz; Transporte de nutriente. |
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Categoria do assunto: |
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P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03610naa a2200205 a 4500
001 1875841
005 2011-07-25
008 2011 bl uuuu u00u1 u #d
100 1 $aFAGERIA, N. K.
245 $aThe role of mineral nutrition on root growth of crop plants.$h[electronic resource]
260 $c2011
520 $aAgriculture is going through a profound revolution worldwide due to increasing world demand for food, higher costs of energy and other inputs, environmental pollution problems, and instability of cropping systems. In this context, knowledge of factors that affect root development is fundamental to improving nutrient cycling and uptake in soil?plant systems. Roots are important organs that supply water, nutrients, hormones, and mechanical support (anchorage) to crop plants and consequently affect economic yields. In addition, roots improve soil organic matter (OM) by contributing to soil pools of organic carbon (C), nitrogen (N), and microbial biomass. Root-derived soil C is retained and forms more stable soil aggregates than shoot-derived soil C. Although roots normally contribute only 10?20% of the total plant weight, a well-developed root system is essential for healthy plant growth and development. Root growth of plants is controlled genetically, but it is also influenced by environmental factors. Mineral nutrition is an important factor influencing the growth of plant roots, but detailed information on nutritional effects is limited, primarily because roots are half-hidden organs that are very difficult to separate from soil. As a result, it is difficult to measure the effect of biotic and abiotic factors on root growth under field conditions. Root growth is mainly measured in terms of root density, length, and weight. Root dry weight is often better related to crop yields than is root length or density. The response of root growth to chemical fertilization is similar to that of shoot growth; however, the magnitude of the response may differ. In nutrient-deficient soils, root weight often increases in a quadratic manner with the addition of chemical fertilizers. Increasing nutrient supplies in the soil may also decrease root length but increase root weight in a quadratic fashion. Roots with adequate nutrient supplies may also have more root hairs than nutrient-deficient roots. This may result in greater uptake of water and nutrients by roots well supplied with essential plant nutrients, compared with roots grown in nutrient-deficient soils. Under favorable conditions, a major part of the root system is usually found in the top 20 cm of soil. Maximum root growth is generally achieved at flowering in cereals and at pod-setting in legumes. Genotypic variations are often found in the response of root growth to nutrient applications, and the possibility of modifying root system response to soil properties offers exciting prospects for future improvements in crop yields. Rooting pattern in crop plants is under multi- or polygenic control, and breeding programs can be used to improve root system properties for environments where drought is a problem. The use of crop species and cultivars tolerant to biotic and abiotic stresses, as well as the use of appropriate cultural practices, can improve plant root system function under favorable and unfavorable environmental conditions.
650 $aNutrição vegetal
650 $aPlanta
650 $aProdução vegetal
650 $aRaíz
650 $aTransporte de nutriente
653 $aNutrição mineral
700 1 $aMOREIRA, A.
773 $tAdvances in Agronomy, New York$gv. 110, p. 251-331, 2011.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
11/07/2022 |
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Data da última atualização: |
13/07/2022 |
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Tipo da produção científica: |
Nota Técnica/Nota Científica |
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Autoria: |
MENDES, S. M.; PIMENTEL, M. A. G.; QUEIROZ, V. A. V.; SILVA, D. D. da; COSTA, R. V. da. |
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Afiliação: |
SIMONE MARTINS MENDES, CNPMS; MARCO AURELIO GUERRA PIMENTEL, CNPMS; VALERIA APARECIDA VIEIRA QUEIROZ, CNPMS; DAGMA DIONISIA DA SILVA, CNPMS; RODRIGO VERAS DA COSTA, CNPMS. |
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Título: |
Effect of earworm injuries on fumonisins production in Bt and non-Bt maize. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Revista Brasileira de Milho e Sorgo, v. 21, e1241, 2022. |
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DOI: |
https://doi.org/10.18512/rbms2022v21e1241 |
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Idioma: |
Inglês |
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Notas: |
Scientific communication. |
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Conteúdo: |
ABSTRACT - Tests were carried out to assess fumonisins production due to lepidopteran feeding on the ears of the hybrid DKB 390VTPRO (Cry1A105/Cry2Ab2) and in its non-Bt isogenic version. Maize ears were harvested and classified according to injury size, and fumonisin levels for each injury class were quantified. There were no significant differences between Bt maize and non-Bt maize in fumonisin production. However, the injury size due to earworm feeding was significant for fumonisin occurrence. The greater the injury, the higher the fumonisins level. RESUMO - Para avaliar a produção de fumonisinas causado pela alimentação de lepidopteros-praga nas espigas de milho Bt e não Bt, foram conduzidos testes, utlizando o híbrido de milho transgênico DKB 390VTPRO (Cry1A105/Cry2Ab2) e sua versão isogênica não-Bt (DKB 390). As espigas foram colhidas e divididas em quatro classes, quanto ao tamanho das injúrias e quantificados os teores de fumonisinas para cada classe. Não se verificou diferença significativa entre o milho Bt e sua versão não Bt, quanto ao níveis de ocorrência de fumonisinas. Contudo, houve efeito do tamanho da injuria na ocorrência de fumonisinas sendo que, quanto maior injúria, maior o nível de fumonisina. |
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Palavras-Chave: |
Ear injury; Transgenic maize. |
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Thesagro: |
Helicoverpa Zea; Lagarta da Espiga; Micotoxina; Milho; Praga de Planta; Spodoptera Frugiperda. |
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Thesaurus NAL: |
Fusarium verticillioides; Mycotoxins. |
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Categoria do assunto: |
O Insetos e Entomologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1144591/1/Effect-of-earworm-injuries-on-fumonisins-production-in-bt-and-non-bt-maize.pdf
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Marc: |
LEADER 02183naa a2200313 a 4500
001 2144591
005 2022-07-13
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.18512/rbms2022v21e1241$2DOI
100 1 $aMENDES, S. M.
245 $aEffect of earworm injuries on fumonisins production in Bt and non-Bt maize.$h[electronic resource]
260 $c2022
500 $aScientific communication.
520 $aABSTRACT - Tests were carried out to assess fumonisins production due to lepidopteran feeding on the ears of the hybrid DKB 390VTPRO (Cry1A105/Cry2Ab2) and in its non-Bt isogenic version. Maize ears were harvested and classified according to injury size, and fumonisin levels for each injury class were quantified. There were no significant differences between Bt maize and non-Bt maize in fumonisin production. However, the injury size due to earworm feeding was significant for fumonisin occurrence. The greater the injury, the higher the fumonisins level. RESUMO - Para avaliar a produção de fumonisinas causado pela alimentação de lepidopteros-praga nas espigas de milho Bt e não Bt, foram conduzidos testes, utlizando o híbrido de milho transgênico DKB 390VTPRO (Cry1A105/Cry2Ab2) e sua versão isogênica não-Bt (DKB 390). As espigas foram colhidas e divididas em quatro classes, quanto ao tamanho das injúrias e quantificados os teores de fumonisinas para cada classe. Não se verificou diferença significativa entre o milho Bt e sua versão não Bt, quanto ao níveis de ocorrência de fumonisinas. Contudo, houve efeito do tamanho da injuria na ocorrência de fumonisinas sendo que, quanto maior injúria, maior o nível de fumonisina.
650 $aFusarium verticillioides
650 $aMycotoxins
650 $aHelicoverpa Zea
650 $aLagarta da Espiga
650 $aMicotoxina
650 $aMilho
650 $aPraga de Planta
650 $aSpodoptera Frugiperda
653 $aEar injury
653 $aTransgenic maize
700 1 $aPIMENTEL, M. A. G.
700 1 $aQUEIROZ, V. A. V.
700 1 $aSILVA, D. D. da
700 1 $aCOSTA, R. V. da
773 $tRevista Brasileira de Milho e Sorgo$gv. 21, e1241, 2022.
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Embrapa Milho e Sorgo (CNPMS) |
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