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Differences in intracellular localization of corn stunt spiroplasmas in magnesium treated maize
Nome, Claudia; Magalhães, Paulo César; Oliveira, Elizabeth; Nome, Sergio; Lagune, Irma Graciela.
  • Nome, Claudia; Instituto Nacional de Investigaciones Agropecuarias. Instituto de Fitopatología y Fisiología Vegetal. Córdoba. AR
  • Magalhães, Paulo César; Embrapa Milho e Sorgo. Sete Lagos. BR
  • Oliveira, Elizabeth; Embrapa Milho e Sorgo. Sete Lagos. BR
  • Nome, Sergio; Instituto Nacional de Investigaciones Agropecuarias. Instituto de Fitopatología y Fisiología Vegetal. Córdoba. AR
  • Lagune, Irma Graciela; Instituto Nacional de Investigaciones Agropecuarias. Instituto de Fitopatología y Fisiología Vegetal. Córdoba. AR
Biocell ; 33(2): 133-136, Aug. 2009. ilus
Artículo en Inglés | LILACS | ID: lil-595030
ABSTRACT
Maize plants infected with Spiroplasma kunkelii show symptoms similar to that of plants in a magnesium-deficient soil, and it has been shown that the spiroplasma alters the plants' magnesium absorption. In the current study we compared changes associated to either spiroplasma infection, two soil magnesium levels and their combinations. Plant symptoms were recorded and correlated with transmission electron microscopy observations. Plants grown on a high magnesium treatment showed no macroscopical alterations nor organelle ultrastructural alterations, while plants on a low magnesium treatment showed macroscopical vein yellowing and, ultrastructurally, they had most chloroplasts and mitochondrial membranes altered. Infected plants on a low magnesium treatment had an ageing aspect, ultrastructurally showed chloroplast s and mitochondrial alterations similar to those non-infected and grown on a low magnesium treatment, and spiroplasma cells were found in phloem cells, but outside their cytoplasm. Infected plants on a high magnesium treatment showed similar symptoms and ultrastructural alterations as either non-infected plants on the low magnesium treatment or in infected plants on the low magnesium treatment, but differ from them in that the spiroplasma cells were located inside the cytoplasm. Results suggest that magnesium is involved in the plant-pathogen interaction.
Asunto(s)
Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Spiroplasma / Zea mays / Espacio Intracelular Idioma: Inglés Revista: Biocell Asunto de la revista: C‚lulas Año: 2009 Tipo del documento: Artículo País de afiliación: Argentina / Brasil Institución/País de afiliación: Embrapa Milho e Sorgo/BR / Instituto Nacional de Investigaciones Agropecuarias/AR

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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Spiroplasma / Zea mays / Espacio Intracelular Idioma: Inglés Revista: Biocell Asunto de la revista: C‚lulas Año: 2009 Tipo del documento: Artículo País de afiliación: Argentina / Brasil Institución/País de afiliación: Embrapa Milho e Sorgo/BR / Instituto Nacional de Investigaciones Agropecuarias/AR