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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
03/08/2001 |
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Data da última atualização: |
03/08/2001 |
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Autoria: |
GONZALEZ, L. E.; BASHAN, Y. |
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Título: |
Increased growth of the microalga chlorella vulgaris when coimmobilized and cocultured in alginate beads with the plant-growth promoting bacterium Azospirillum brasiliense. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Applied and Environmental Microbiology, Washington, v. 66, n. 4, p. 1527-1531, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
Coimmobilization of the freshwater microalga Chlorella vulgaris and the plant-growth-promoting bacterium Azospirillum brasiliense in small alginate beads resulted in a significantly increased growth of the microalga. Dry and fresh weight, total number of cells, size of the microalgal clusters (colonies) withinvthe bead, number of microalgal cells per cluster, and the levels of microalgal pigments significantly increased. Light microscopy revealed that both microorganisms colonized the same cavities inside the beads, though the microalgae tended to concentrate in the more aerated periphery while the bacteria colonized the entire bead. The effect of indole-3-acetic acid addition to microalgal culture prior to immobilization of microorganisms in alginate beads partially imitated the effect of A.brasiliense. We propose that coimmobilization of microalgae and plant-growth-promoting bacteria is an effective means of increasing microalgal populations within confined environments. |
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Palavras-Chave: |
Growth. |
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Thesagro: |
Bactéria; Crescimento. |
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Categoria do assunto: |
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Marc: |
LEADER 01574naa a2200169 a 4500
001 1621233
005 2001-08-03
008 2000 bl --- 0-- u #d
100 1 $aGONZALEZ, L. E.
245 $aIncreased growth of the microalga chlorella vulgaris when coimmobilized and cocultured in alginate beads with the plant-growth promoting bacterium Azospirillum brasiliense.
260 $c2000
520 $aCoimmobilization of the freshwater microalga Chlorella vulgaris and the plant-growth-promoting bacterium Azospirillum brasiliense in small alginate beads resulted in a significantly increased growth of the microalga. Dry and fresh weight, total number of cells, size of the microalgal clusters (colonies) withinvthe bead, number of microalgal cells per cluster, and the levels of microalgal pigments significantly increased. Light microscopy revealed that both microorganisms colonized the same cavities inside the beads, though the microalgae tended to concentrate in the more aerated periphery while the bacteria colonized the entire bead. The effect of indole-3-acetic acid addition to microalgal culture prior to immobilization of microorganisms in alginate beads partially imitated the effect of A.brasiliense. We propose that coimmobilization of microalgae and plant-growth-promoting bacteria is an effective means of increasing microalgal populations within confined environments.
650 $aBactéria
650 $aCrescimento
653 $aGrowth
700 1 $aBASHAN, Y.
773 $tApplied and Environmental Microbiology, Washington$gv. 66, n. 4, p. 1527-1531, 2000.
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Embrapa Agrobiologia (CNPAB) |
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