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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
16/12/2010 |
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Data da última atualização: |
20/10/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BROWN, G. G.; KRETZSCHMAR, A.; PATRÓN, J. C. |
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Afiliação: |
GEORGE GARDNER BROWN, CNPF; ANDRÉ KRETZSCHMAR, INRA; JOSE CINCO PATRON IBARRA, Benemérita Universidad Autónoma de Puebla. |
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Título: |
Modification of root density in pot experiments with two tropical earthworm species. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Acta Zoológica Mexicana, nesp. 2, p. 241-259, 2010. |
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Idioma: |
Português |
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Conteúdo: |
Three greenhouse experiments were performed to assess the role oftwo common tropical geophagous endogeic earthworm species, Pontoscolex corethrurus and Polypheretima elongata, on root density of several plant species in two soil types, a clayey Andosol and a sandy Alfisol, from Veracruz, Mexico. The equivalent of about 12 kg dry soil were placed into 20 I plastic pots and 3-14 individuais were inoculated to pots planted with common beans (Phaseolus vulgaris), Brachiaria decumbens pasture grass under four P fertilization regimes (O, 1.6,8.4 and 10 kg P ha+) and maize (Zea mays) with or without surface residues. Pots received only one species of earthworms (either P. corethrurus or P. elongata). At harvest, the pots were cut in halfand a transparent plastic sheet (overheads) used to draw root and earthworm structures (burrows, casts) in vertical and horizontal (every 5 em) planes. The drawings were scanned, binarized and submitted to image analysis techniques to determine the density of roots, casts and burrows. Root density was generally higher and there was a trend for more even distribution of roots in the soil, both horizontally and vertically, in the presence of earthworms. Nevertheless, few relationships were observed between root density and shoot biomass or the density of earthworm casts and burrows. A more diffuse (less aggregated) root distribution due to earthworms may aid plants in resistance to stress, although the induced changes in the root system may not necessarily leacÍ to greater yields. MenosThree greenhouse experiments were performed to assess the role oftwo common tropical geophagous endogeic earthworm species, Pontoscolex corethrurus and Polypheretima elongata, on root density of several plant species in two soil types, a clayey Andosol and a sandy Alfisol, from Veracruz, Mexico. The equivalent of about 12 kg dry soil were placed into 20 I plastic pots and 3-14 individuais were inoculated to pots planted with common beans (Phaseolus vulgaris), Brachiaria decumbens pasture grass under four P fertilization regimes (O, 1.6,8.4 and 10 kg P ha+) and maize (Zea mays) with or without surface residues. Pots received only one species of earthworms (either P. corethrurus or P. elongata). At harvest, the pots were cut in halfand a transparent plastic sheet (overheads) used to draw root and earthworm structures (burrows, casts) in vertical and horizontal (every 5 em) planes. The drawings were scanned, binarized and submitted to image analysis techniques to determine the density of roots, casts and burrows. Root density was generally higher and there was a trend for more even distribution of roots in the soil, both horizontally and vertically, in the presence of earthworms. Nevertheless, few relationships were observed between root density and shoot biomass or the density of earthworm casts and burrows. A more diffuse (less aggregated) root distribution due to earthworms may aid plants in resistance to stress, although the induced changes in the root system may not necess... Mostrar Tudo |
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Thesagro: |
Minhoca. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01976naa a2200157 a 4500
001 1870205
005 2015-10-20
008 2010 bl uuuu u00u1 u #d
100 1 $aBROWN, G. G.
245 $aModification of root density in pot experiments with two tropical earthworm species.
260 $c2010
520 $aThree greenhouse experiments were performed to assess the role oftwo common tropical geophagous endogeic earthworm species, Pontoscolex corethrurus and Polypheretima elongata, on root density of several plant species in two soil types, a clayey Andosol and a sandy Alfisol, from Veracruz, Mexico. The equivalent of about 12 kg dry soil were placed into 20 I plastic pots and 3-14 individuais were inoculated to pots planted with common beans (Phaseolus vulgaris), Brachiaria decumbens pasture grass under four P fertilization regimes (O, 1.6,8.4 and 10 kg P ha+) and maize (Zea mays) with or without surface residues. Pots received only one species of earthworms (either P. corethrurus or P. elongata). At harvest, the pots were cut in halfand a transparent plastic sheet (overheads) used to draw root and earthworm structures (burrows, casts) in vertical and horizontal (every 5 em) planes. The drawings were scanned, binarized and submitted to image analysis techniques to determine the density of roots, casts and burrows. Root density was generally higher and there was a trend for more even distribution of roots in the soil, both horizontally and vertically, in the presence of earthworms. Nevertheless, few relationships were observed between root density and shoot biomass or the density of earthworm casts and burrows. A more diffuse (less aggregated) root distribution due to earthworms may aid plants in resistance to stress, although the induced changes in the root system may not necessarily leacÍ to greater yields.
650 $aMinhoca
700 1 $aKRETZSCHMAR, A.
700 1 $aPATRÓN, J. C.
773 $tActa Zoológica Mexicana, nesp. 2, p. 241-259, 2010.
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Registro original: |
Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
12/08/2019 |
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Data da última atualização: |
02/12/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
OLIVEIRA, P. G. de; QUEIROZ, M. A. de; CASTRO, J. M. da C. e; RIBEIRO, J. M.; OLIVEIRA, R. S. de; SILVA, M. J. L. da. |
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Afiliação: |
PATRÍCIA GOMES DE OLIVEIRA; MANOEL ABILIO DE QUEIROZ; JOSE MAURO DA CUNHA E CASTRO, CPATSA; JULIANA MARTINS RIBEIRO, CPATSA; RONALDO SIMÃO DE OLIVEIRA; MARIA JOSÉ LIMA DA SILVA. |
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Título: |
Reaction of Psidium spp accessions to different levels of inoculation with Meloidogyne enterolobii. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Revista Caatinga, v. 32, n. 2, p. 419-428, abr./jun. 2019. |
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DOI: |
10.1590/1983 - 21252019v32n215rc |
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Idioma: |
Inglês |
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Conteúdo: |
Meloidogyne enterolobii associated with Fusarium solani causes the guava decay, which is the main factor of yield loss in guava crops and limits guava production in Brazil. Therefore, searching for guava genotypes (Psidium spp.) with resistance to M. enterolobii is important to control this root-knot nematode. The objective of the present work was to evaluate the reaction of Psidium spp. accessions from the Germplasm Bank of the Bahia State University (UNEB) to different levels of inoculation with M. enterolobii. Guava seedlings were inoculated with 600, 1,600, and 2,000 eggs + J2 second stage juveniles of M. enterolobii and the root fresh weight, total number of eggs (TNE), and reproduction factor (RF) were evaluated. The results were subjected to ANOVA and means were clustered using the Scott-Knott test at 5% probability. The diversity of accessions was estimated using the Tocher's clustering and UPGMA methods. The nematode RF reduced in some accessions with increasing inoculation levels of the nematode. However, the RF increased in some accessions with high levels of inoculation. Plants of the Y50 accession were immune or resistant to M. enterolobii, indicating variability of reaction of plants to the nematode within the Psidium genus. The resistance of Psidium accessions to M. enterolobii needs to be measured with different inoculation levels to verify the existence of false-positive results, since the evaluated accessions, including the Paluma cultivar, presented distinct reactions regarding RF in the three levels of inoculation used. MenosMeloidogyne enterolobii associated with Fusarium solani causes the guava decay, which is the main factor of yield loss in guava crops and limits guava production in Brazil. Therefore, searching for guava genotypes (Psidium spp.) with resistance to M. enterolobii is important to control this root-knot nematode. The objective of the present work was to evaluate the reaction of Psidium spp. accessions from the Germplasm Bank of the Bahia State University (UNEB) to different levels of inoculation with M. enterolobii. Guava seedlings were inoculated with 600, 1,600, and 2,000 eggs + J2 second stage juveniles of M. enterolobii and the root fresh weight, total number of eggs (TNE), and reproduction factor (RF) were evaluated. The results were subjected to ANOVA and means were clustered using the Scott-Knott test at 5% probability. The diversity of accessions was estimated using the Tocher's clustering and UPGMA methods. The nematode RF reduced in some accessions with increasing inoculation levels of the nematode. However, the RF increased in some accessions with high levels of inoculation. Plants of the Y50 accession were immune or resistant to M. enterolobii, indicating variability of reaction of plants to the nematode within the Psidium genus. The resistance of Psidium accessions to M. enterolobii needs to be measured with different inoculation levels to verify the existence of false-positive results, since the evaluated accessions, including the Paluma cultivar, presented distin... Mostrar Tudo |
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Palavras-Chave: |
Meloidogyne enterolobii; Nematoide das galhas; Variabilidade genética. |
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Thesagro: |
Banco de Germoplasma; Doença; Goiaba; Nematóide. |
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Thesaurus NAL: |
Guavas; Psidium; Root-knot nematodes. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/200610/1/Reaction-of-2019.pdf
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Marc: |
LEADER 02512naa a2200313 a 4500
001 2111269
005 2019-12-02
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1590/1983 - 21252019v32n215rc$2DOI
100 1 $aOLIVEIRA, P. G. de
245 $aReaction of Psidium spp accessions to different levels of inoculation with Meloidogyne enterolobii.$h[electronic resource]
260 $c2019
520 $aMeloidogyne enterolobii associated with Fusarium solani causes the guava decay, which is the main factor of yield loss in guava crops and limits guava production in Brazil. Therefore, searching for guava genotypes (Psidium spp.) with resistance to M. enterolobii is important to control this root-knot nematode. The objective of the present work was to evaluate the reaction of Psidium spp. accessions from the Germplasm Bank of the Bahia State University (UNEB) to different levels of inoculation with M. enterolobii. Guava seedlings were inoculated with 600, 1,600, and 2,000 eggs + J2 second stage juveniles of M. enterolobii and the root fresh weight, total number of eggs (TNE), and reproduction factor (RF) were evaluated. The results were subjected to ANOVA and means were clustered using the Scott-Knott test at 5% probability. The diversity of accessions was estimated using the Tocher's clustering and UPGMA methods. The nematode RF reduced in some accessions with increasing inoculation levels of the nematode. However, the RF increased in some accessions with high levels of inoculation. Plants of the Y50 accession were immune or resistant to M. enterolobii, indicating variability of reaction of plants to the nematode within the Psidium genus. The resistance of Psidium accessions to M. enterolobii needs to be measured with different inoculation levels to verify the existence of false-positive results, since the evaluated accessions, including the Paluma cultivar, presented distinct reactions regarding RF in the three levels of inoculation used.
650 $aGuavas
650 $aPsidium
650 $aRoot-knot nematodes
650 $aBanco de Germoplasma
650 $aDoença
650 $aGoiaba
650 $aNematóide
653 $aMeloidogyne enterolobii
653 $aNematoide das galhas
653 $aVariabilidade genética
700 1 $aQUEIROZ, M. A. de
700 1 $aCASTRO, J. M. da C. e
700 1 $aRIBEIRO, J. M.
700 1 $aOLIVEIRA, R. S. de
700 1 $aSILVA, M. J. L. da
773 $tRevista Caatinga$gv. 32, n. 2, p. 419-428, abr./jun. 2019.
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