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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
22/01/1996 |
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Data da última atualização: |
18/01/2010 |
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Autoria: |
MIHAIL, J. D.; ORUM, T. V.; ALCORN, S. M.; STROEHLEIN, J. L. |
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Título: |
Macrophomina phaseolina in the Sonoran desert. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Canadian Journal of Botany, v. 67, p. 76-82, 1989. |
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Idioma: |
Inglês |
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Conteúdo: |
The relatioship between microsclerotial populations of Macrophomina phaseolina (Tassi) Goid. and selected perennial species was investigated at five native Sonoran desert sites. The population level of Macrophomina phaseolina was found to have an inverse relationship with the presence of several plant species, including Acacia constricta and Larrea tridentata, as measured by canopy cover, plant counts, and proximity of the soil sampling point to the nearest individual. Microsclerotia of M. phaseolina were detected in 45% of the 500 quadrats (3.3m2) sampled, with a maximum observed population of 233 microsclerotia per 20g soil. The microsclerotial populations of the five study sites showed significant aggregation as measured by Morisita's index of dispersion. Norelationship was found between microsclerotial populations and soil pH, soil nitrate, or total soil nitrogen. The frequency of detection and population level of this agriculturally important pathogen raises questions concerning the role of the fungus in the Sonoran desert ecosystem. |
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Palavras-Chave: |
Desert. |
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Thesagro: |
Deserto; Ecologia; Fungo. |
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Thesaurus Nal: |
ecology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01584naa a2200217 a 4500
001 1075717
005 2010-01-18
008 1989 bl --- 0-- u #d
100 1 $aMIHAIL, J. D.
245 $aMacrophomina phaseolina in the Sonoran desert.
260 $c1989
520 $aThe relatioship between microsclerotial populations of Macrophomina phaseolina (Tassi) Goid. and selected perennial species was investigated at five native Sonoran desert sites. The population level of Macrophomina phaseolina was found to have an inverse relationship with the presence of several plant species, including Acacia constricta and Larrea tridentata, as measured by canopy cover, plant counts, and proximity of the soil sampling point to the nearest individual. Microsclerotia of M. phaseolina were detected in 45% of the 500 quadrats (3.3m2) sampled, with a maximum observed population of 233 microsclerotia per 20g soil. The microsclerotial populations of the five study sites showed significant aggregation as measured by Morisita's index of dispersion. Norelationship was found between microsclerotial populations and soil pH, soil nitrate, or total soil nitrogen. The frequency of detection and population level of this agriculturally important pathogen raises questions concerning the role of the fungus in the Sonoran desert ecosystem.
650 $aecology
650 $aDeserto
650 $aEcologia
650 $aFungo
653 $aDesert
700 1 $aORUM, T. V.
700 1 $aALCORN, S. M.
700 1 $aSTROEHLEIN, J. L.
773 $tCanadian Journal of Botany$gv. 67, p. 76-82, 1989.
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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