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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
12/02/2016 |
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Data da última atualização: |
12/02/2016 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
VOORT, M.; MENDES, R.; RAAIJMAKERS, J. M. |
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Afiliação: |
M. VOORT, Wageningen University, Netherlands; RODRIGO MENDES, CNPMA; J. M. RAAIJMAKERS, Netherlands lnstitute of Ecology (N/00-KNA IN), Netherlands. |
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Título: |
Impact of soil heat treatment on bacterial community reassembly in the rhizosphere. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: RHIZOSPHERE, 4., 2015, Maastricht. Stretching the interface of life: abstracts. Maastricht: Wageningen University & Research Centre and the Netherlands Institute of Ecology, 2015. Ref. 149. |
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Páginas: |
302 |
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Idioma: |
Inglês |
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Conteúdo: |
The rhizosphere microbiome offers a range of ecosystem services to the plant. Including nutrient acquisition, tolerance to abiotic stress and protection against diseases. Here we studied how heat treatment of soil disturbs the reassembly of the bacterial community in the rhizosphere and how this affects tolerance to pathogen infection. Using PhyloChip-based community profiling, we assessed the impact of 1-hour heat treatments of 50ºC or 80ºC on the bacterial community composition in the rhizosphere of sugar beet seedlings grown in a soil that is naturally suppressive to the soil-borne fungus Rhizoctonia solani. The heat disturbance caused significant increase of alpha diversity and led to a partial (50ºC) or complete (80ºC) loss of protection against fungal infection. The bacterial families Bacillaceae, Comamonadaceae, Paenibacillaceae and Alcaligenaceae showed a significant increase in relative abundance with increasing temperatures. The Pseudomonadaceae and Burkholderiaceae showed higher abundance only when the soil was heat-treated at 80ºC. Conversely, the bacterial families Streptomycetaceae, Micrococcaceae, Solibacteraceae and Mycobacteriaceae showed a reduction in relative abundance when the soil was heat-treated at 80ºC. Based on these results, we propose a reassembly model where bacterial groups that are most heat-tolerant and with high growth rates increase in relative abundance after heat disturbance, while temperature-sensitive and slow growing bacteria have a disadvantage. The results also point to a potential role of slow growing bacterial families from Actinobacteria and Acidobacteria phyla in protection of plants against fungal infection. With this study we showed that heat disturbance in soil results in a rearranged rhizosphere bacterial community, which in turn leads to changes in the ecosystem services of the soil. MenosThe rhizosphere microbiome offers a range of ecosystem services to the plant. Including nutrient acquisition, tolerance to abiotic stress and protection against diseases. Here we studied how heat treatment of soil disturbs the reassembly of the bacterial community in the rhizosphere and how this affects tolerance to pathogen infection. Using PhyloChip-based community profiling, we assessed the impact of 1-hour heat treatments of 50ºC or 80ºC on the bacterial community composition in the rhizosphere of sugar beet seedlings grown in a soil that is naturally suppressive to the soil-borne fungus Rhizoctonia solani. The heat disturbance caused significant increase of alpha diversity and led to a partial (50ºC) or complete (80ºC) loss of protection against fungal infection. The bacterial families Bacillaceae, Comamonadaceae, Paenibacillaceae and Alcaligenaceae showed a significant increase in relative abundance with increasing temperatures. The Pseudomonadaceae and Burkholderiaceae showed higher abundance only when the soil was heat-treated at 80ºC. Conversely, the bacterial families Streptomycetaceae, Micrococcaceae, Solibacteraceae and Mycobacteriaceae showed a reduction in relative abundance when the soil was heat-treated at 80ºC. Based on these results, we propose a reassembly model where bacterial groups that are most heat-tolerant and with high growth rates increase in relative abundance after heat disturbance, while temperature-sensitive and slow growing bacteria have a dis... Mostrar Tudo |
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Palavras-Chave: |
Soil heat treatment. |
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Thesagro: |
Bactéria; Rizosfera. |
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Categoria do assunto: |
S Ciências Biológicas |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/138815/1/2015RA-069.pdf
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Marc: |
LEADER 02544nam a2200181 a 4500
001 2036705
005 2016-02-12
008 2015 bl uuuu u00u1 u #d
100 1 $aVOORT, M.
245 $aImpact of soil heat treatment on bacterial community reassembly in the rhizosphere.$h[electronic resource]
260 $aIn: RHIZOSPHERE, 4., 2015, Maastricht. Stretching the interface of life: abstracts. Maastricht: Wageningen University & Research Centre and the Netherlands Institute of Ecology, 2015. Ref. 149.$c2015
300 $a302
520 $aThe rhizosphere microbiome offers a range of ecosystem services to the plant. Including nutrient acquisition, tolerance to abiotic stress and protection against diseases. Here we studied how heat treatment of soil disturbs the reassembly of the bacterial community in the rhizosphere and how this affects tolerance to pathogen infection. Using PhyloChip-based community profiling, we assessed the impact of 1-hour heat treatments of 50ºC or 80ºC on the bacterial community composition in the rhizosphere of sugar beet seedlings grown in a soil that is naturally suppressive to the soil-borne fungus Rhizoctonia solani. The heat disturbance caused significant increase of alpha diversity and led to a partial (50ºC) or complete (80ºC) loss of protection against fungal infection. The bacterial families Bacillaceae, Comamonadaceae, Paenibacillaceae and Alcaligenaceae showed a significant increase in relative abundance with increasing temperatures. The Pseudomonadaceae and Burkholderiaceae showed higher abundance only when the soil was heat-treated at 80ºC. Conversely, the bacterial families Streptomycetaceae, Micrococcaceae, Solibacteraceae and Mycobacteriaceae showed a reduction in relative abundance when the soil was heat-treated at 80ºC. Based on these results, we propose a reassembly model where bacterial groups that are most heat-tolerant and with high growth rates increase in relative abundance after heat disturbance, while temperature-sensitive and slow growing bacteria have a disadvantage. The results also point to a potential role of slow growing bacterial families from Actinobacteria and Acidobacteria phyla in protection of plants against fungal infection. With this study we showed that heat disturbance in soil results in a rearranged rhizosphere bacterial community, which in turn leads to changes in the ecosystem services of the soil.
650 $aBactéria
650 $aRizosfera
653 $aSoil heat treatment
700 1 $aMENDES, R.
700 1 $aRAAIJMAKERS, J. M.
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Embrapa Meio Ambiente (CNPMA) |
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