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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
31/08/2011 |
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Data da última atualização: |
31/08/2011 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
CASTRO, A. P. de; COLOMBARI FILHO, J. M.; MORAIS, O. P. de; GUIMARÃES, C. M. |
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Afiliação: |
ADRIANO PEREIRA DE CASTRO, CNPAF; JOSE MANOEL COLOMBARI FILHO, CNPAF; ORLANDO PEIXOTO DE MORAIS, CNPAF; CLEBER MORAIS GUIMARAES, CNPAF. |
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Título: |
Tolerância de linhagens elite de arroz de terras altas ao estresse hídrico. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 6., 2011, Búzios. Panorama atual e perspectivas do melhoramento de plantas no Brasil. [Búzios]: SBMP, 2011. |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Português |
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Conteúdo: |
O estresse hídrico é um fator limitante no cultivo do arroz de terras altas. Este fator abiótico se torna ainda mais severo quando consideradas as condições dos solos do cerrado brasileiro. O objetivo deste trabalho foi avaliar linhagens-elite do programa de melhoramento de arroz de terras altas da Embrapa quanto a sua tolerância ao estresse hídrico. Para todas as características avaliadas foi significativo o efeito do estresse hídrico na redução da produtividade final, seja pelo subdesenvolvimento das plantas e/ou problemas de esterilidade. |
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Palavras-Chave: |
Estresse hídrico. |
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Thesagro: |
Arroz; Melhoramento genético vegetal; Oryza sativa. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/40922/1/3618.pdf
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Marc: |
LEADER 01266nam a2200205 a 4500
001 1899356
005 2011-08-31
008 2011 bl uuuu u00u1 u #d
100 1 $aCASTRO, A. P. de
245 $aTolerância de linhagens elite de arroz de terras altas ao estresse hídrico.
260 $aIn: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 6., 2011, Búzios. Panorama atual e perspectivas do melhoramento de plantas no Brasil. [Búzios]: SBMP$c2011
300 $c1 CD-ROM.
520 $aO estresse hídrico é um fator limitante no cultivo do arroz de terras altas. Este fator abiótico se torna ainda mais severo quando consideradas as condições dos solos do cerrado brasileiro. O objetivo deste trabalho foi avaliar linhagens-elite do programa de melhoramento de arroz de terras altas da Embrapa quanto a sua tolerância ao estresse hídrico. Para todas as características avaliadas foi significativo o efeito do estresse hídrico na redução da produtividade final, seja pelo subdesenvolvimento das plantas e/ou problemas de esterilidade.
650 $aArroz
650 $aMelhoramento genético vegetal
650 $aOryza sativa
653 $aEstresse hídrico
700 1 $aCOLOMBARI FILHO, J. M.
700 1 $aMORAIS, O. P. de
700 1 $aGUIMARÃES, C. M.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
11/09/2023 |
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Data da última atualização: |
10/11/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 4 |
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Autoria: |
OLIVEIRA, C. M. de; SABATO, E. de O.; BARROS, B. de A. |
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Afiliação: |
CHARLES MARTINS DE OLIVEIRA, CPAC; ELIZABETH DE OLIVEIRA SABATO, PESQUISADORA APOSENTADA-CNPMS; BEATRIZ DE ALMEIDA BARROS, CNPMS. |
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Título: |
Natural infectivity of Dalbulus maidis populations and incidence of corn stunt and virus diseases in maize over time. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Tropical Plant Pathology, v. 48, p. 575-580, 2023. |
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DOI: |
https://doi.org/10.1007/s40858-023-00599-0 |
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Idioma: |
Inglês |
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Conteúdo: |
The aim of this study was to evaluate the natural infectivity of Dalbulus maidis with spiroplasma (corn stunt spiroplasma'CSS'Spiroplasma kunkelii), phytoplasma (maize bushy stunt phytoplasma'MBSP), and virus (maize rayado fino virus'MRFV) through transmission tests using two densities of leafhoppers (one and five adult D. maidis) collected fortnightly from maize fields during two agricultural years. During 35 months D. maidis adults were collected in maize at intervals of 15 days with entomological net (Sete Lagoas/MG, Brazil). The leafhoppers were confined in number of one or five individuals by maize plant (V2 stage) for an inoculation access period (IAP) of five days. At flowering stage, plant disease symptoms were evaluated. The total percentage of plants showing symptoms of infection by at least one of the pathogens (spiroplasma, phytoplasma or MRFV) was significantly higher for plants that were exposed to five leafhoppers (24.2%) compared to those exposed to one leafhopper (12.3%). The percent of diseased plants was similar in Autumn (20.0%), Winter (18.8%), Springer (16.1%) and Summer (18.3%). However, spiroplasma infection was predominant in Summer. Our results demonstrated that a five-fold increase in the number of D. maidis on maize plants led to a two-fold increase in the number of symptomatic plants. Under natural conditions, leafhoppers have the ability to visit multiple plants during the post-emergence phase, thereby transmitting pathogens to multiple plants that become source plants for corn stunt and virus diseases. Therefore, population reduction of D. maidis can be a critical strategy for managing these diseases in maize crops. MenosThe aim of this study was to evaluate the natural infectivity of Dalbulus maidis with spiroplasma (corn stunt spiroplasma'CSS'Spiroplasma kunkelii), phytoplasma (maize bushy stunt phytoplasma'MBSP), and virus (maize rayado fino virus'MRFV) through transmission tests using two densities of leafhoppers (one and five adult D. maidis) collected fortnightly from maize fields during two agricultural years. During 35 months D. maidis adults were collected in maize at intervals of 15 days with entomological net (Sete Lagoas/MG, Brazil). The leafhoppers were confined in number of one or five individuals by maize plant (V2 stage) for an inoculation access period (IAP) of five days. At flowering stage, plant disease symptoms were evaluated. The total percentage of plants showing symptoms of infection by at least one of the pathogens (spiroplasma, phytoplasma or MRFV) was significantly higher for plants that were exposed to five leafhoppers (24.2%) compared to those exposed to one leafhopper (12.3%). The percent of diseased plants was similar in Autumn (20.0%), Winter (18.8%), Springer (16.1%) and Summer (18.3%). However, spiroplasma infection was predominant in Summer. Our results demonstrated that a five-fold increase in the number of D. maidis on maize plants led to a two-fold increase in the number of symptomatic plants. Under natural conditions, leafhoppers have the ability to visit multiple plants during the post-emergence phase, thereby transmitting pathogens to multiple plants t... Mostrar Tudo |
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Palavras-Chave: |
Densidade populacional; Infecciosidade natural; Manejo integrado; Natural infectivity. |
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Thesagro: |
Inseto; Vetor. |
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Thesaurus NAL: |
Insect vectors; Integrated pest management; Population density. |
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Categoria do assunto: |
O Insetos e Entomologia |
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Marc: |
LEADER 02524naa a2200265 a 4500
001 2156553
005 2023-11-10
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s40858-023-00599-0$2DOI
100 1 $aOLIVEIRA, C. M. de
245 $aNatural infectivity of Dalbulus maidis populations and incidence of corn stunt and virus diseases in maize over time.$h[electronic resource]
260 $c2023
520 $aThe aim of this study was to evaluate the natural infectivity of Dalbulus maidis with spiroplasma (corn stunt spiroplasma'CSS'Spiroplasma kunkelii), phytoplasma (maize bushy stunt phytoplasma'MBSP), and virus (maize rayado fino virus'MRFV) through transmission tests using two densities of leafhoppers (one and five adult D. maidis) collected fortnightly from maize fields during two agricultural years. During 35 months D. maidis adults were collected in maize at intervals of 15 days with entomological net (Sete Lagoas/MG, Brazil). The leafhoppers were confined in number of one or five individuals by maize plant (V2 stage) for an inoculation access period (IAP) of five days. At flowering stage, plant disease symptoms were evaluated. The total percentage of plants showing symptoms of infection by at least one of the pathogens (spiroplasma, phytoplasma or MRFV) was significantly higher for plants that were exposed to five leafhoppers (24.2%) compared to those exposed to one leafhopper (12.3%). The percent of diseased plants was similar in Autumn (20.0%), Winter (18.8%), Springer (16.1%) and Summer (18.3%). However, spiroplasma infection was predominant in Summer. Our results demonstrated that a five-fold increase in the number of D. maidis on maize plants led to a two-fold increase in the number of symptomatic plants. Under natural conditions, leafhoppers have the ability to visit multiple plants during the post-emergence phase, thereby transmitting pathogens to multiple plants that become source plants for corn stunt and virus diseases. Therefore, population reduction of D. maidis can be a critical strategy for managing these diseases in maize crops.
650 $aInsect vectors
650 $aIntegrated pest management
650 $aPopulation density
650 $aInseto
650 $aVetor
653 $aDensidade populacional
653 $aInfecciosidade natural
653 $aManejo integrado
653 $aNatural infectivity
700 1 $aSABATO, E. de O.
700 1 $aBARROS, B. de A.
773 $tTropical Plant Pathology$gv. 48, p. 575-580, 2023.
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Embrapa Milho e Sorgo (CNPMS) |
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