X-ray microanalytical studies of mineral elements in the tripartite symbiosis between lima bean, N2-fixing bacteria and mycorrhizal fungi.
Identifieur interne : 000E75 ( Main/Corpus ); précédent : 000E74; suivant : 000E76X-ray microanalytical studies of mineral elements in the tripartite symbiosis between lima bean, N2-fixing bacteria and mycorrhizal fungi.
Auteurs : Bruna Wurr Rodak ; Douglas Siqueira Freitas ; Soraya Marx Bamberg ; Marco Aurélio Carbone Carneiro ; Luiz Roberto Guimarães GuilhermeSource :
- Journal of microbiological methods [ 1872-8359 ] ; 2017.
English descriptors
- KwdEn :
- Electron Probe Microanalysis (MeSH), Fabaceae (chemistry), Fabaceae (microbiology), Microscopy, Electron, Scanning (MeSH), Mycorrhizae (isolation & purification), Nitrogen-Fixing Bacteria (isolation & purification), Particle Size (MeSH), Plant Roots (chemistry), Plant Roots (microbiology), Spectrometry, X-Ray Emission (MeSH), Symbiosis (MeSH), Trace Elements (analysis).
- MESH :
- chemical , analysis : Trace Elements.
- chemistry : Fabaceae, Plant Roots.
- isolation & purification : Mycorrhizae, Nitrogen-Fixing Bacteria.
- microbiology : Fabaceae, Plant Roots.
- Electron Probe Microanalysis, Microscopy, Electron, Scanning, Particle Size, Spectrometry, X-Ray Emission, Symbiosis.
Abstract
The symbiosis between legumes, arbuscular mycorrhizal (AM) fungi, and N2-fixing bacteria (NFB) provides mutual nutritional gains. However, assessing the nutritional status of the microorganisms is a difficult task. A methodology that could assess this status, in situ, could assist managing these organisms in agriculture. This study used X-ray microanalyses to quantify and locate mineral elements in structures formed in a tripartite symbiosis. Lima bean (Phaseolus lunatus L. Walp) was cultivated in pots under greenhouse conditions, to which we have added AM fungal isolates (Glomus macrocarpum and Acaulospora colombiana) and NFB (Bradyrhizobium japonicum) inocula. Uninoculated control plants were also included. Symbionts were evaluated at the onset of flowering. Quantification of the mineral elements in the symbiotic components was performed using energy dispersive X-ray spectroscopy (EDX) and a scanning electron microscopy (SEM) was used to identify structures. EDX analysis detected 13 elements with the most abundant being N, Ca, and Se, occurring in all tissues, Fe in roots, Ni and Al in epidermis and P and Mo in nodules. Elemental quantification in fungal structures was not possible. The distribution of elements was related to their symbiotic function. X-ray microanalysis can be efficiently applied for nutritional diagnosis in tripartite symbiosis.
DOI: 10.1016/j.mimet.2016.11.006
PubMed: 27838542
Links to Exploration step
pubmed:27838542Le document en format XML
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-fixing bacteria and mycorrhizal fungi.</title>
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-fixing bacteria and mycorrhizal fungi.</title>
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<term>Fabaceae (chemistry)</term>
<term>Fabaceae (microbiology)</term>
<term>Microscopy, Electron, Scanning (MeSH)</term>
<term>Mycorrhizae (isolation & purification)</term>
<term>Nitrogen-Fixing Bacteria (isolation & purification)</term>
<term>Particle Size (MeSH)</term>
<term>Plant Roots (chemistry)</term>
<term>Plant Roots (microbiology)</term>
<term>Spectrometry, X-Ray Emission (MeSH)</term>
<term>Symbiosis (MeSH)</term>
<term>Trace Elements (analysis)</term>
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<keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Trace Elements</term>
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<keywords scheme="MESH" qualifier="isolation & purification" xml:lang="en"><term>Mycorrhizae</term>
<term>Nitrogen-Fixing Bacteria</term>
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<term>Microscopy, Electron, Scanning</term>
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<front><div type="abstract" xml:lang="en">The symbiosis between legumes, arbuscular mycorrhizal (AM) fungi, and N<sub>2</sub>
-fixing bacteria (NFB) provides mutual nutritional gains. However, assessing the nutritional status of the microorganisms is a difficult task. A methodology that could assess this status, in situ, could assist managing these organisms in agriculture. This study used X-ray microanalyses to quantify and locate mineral elements in structures formed in a tripartite symbiosis. Lima bean (Phaseolus lunatus L. Walp) was cultivated in pots under greenhouse conditions, to which we have added AM fungal isolates (Glomus macrocarpum and Acaulospora colombiana) and NFB (Bradyrhizobium japonicum) inocula. Uninoculated control plants were also included. Symbionts were evaluated at the onset of flowering. Quantification of the mineral elements in the symbiotic components was performed using energy dispersive X-ray spectroscopy (EDX) and a scanning electron microscopy (SEM) was used to identify structures. EDX analysis detected 13 elements with the most abundant being N, Ca, and Se, occurring in all tissues, Fe in roots, Ni and Al in epidermis and P and Mo in nodules. Elemental quantification in fungal structures was not possible. The distribution of elements was related to their symbiotic function. X-ray microanalysis can be efficiently applied for nutritional diagnosis in tripartite symbiosis.</div>
</front>
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<ArticleTitle>X-ray microanalytical studies of mineral elements in the tripartite symbiosis between lima bean, N<sub>2</sub>
-fixing bacteria and mycorrhizal fungi.</ArticleTitle>
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<Abstract><AbstractText>The symbiosis between legumes, arbuscular mycorrhizal (AM) fungi, and N<sub>2</sub>
-fixing bacteria (NFB) provides mutual nutritional gains. However, assessing the nutritional status of the microorganisms is a difficult task. A methodology that could assess this status, in situ, could assist managing these organisms in agriculture. This study used X-ray microanalyses to quantify and locate mineral elements in structures formed in a tripartite symbiosis. Lima bean (Phaseolus lunatus L. Walp) was cultivated in pots under greenhouse conditions, to which we have added AM fungal isolates (Glomus macrocarpum and Acaulospora colombiana) and NFB (Bradyrhizobium japonicum) inocula. Uninoculated control plants were also included. Symbionts were evaluated at the onset of flowering. Quantification of the mineral elements in the symbiotic components was performed using energy dispersive X-ray spectroscopy (EDX) and a scanning electron microscopy (SEM) was used to identify structures. EDX analysis detected 13 elements with the most abundant being N, Ca, and Se, occurring in all tissues, Fe in roots, Ni and Al in epidermis and P and Mo in nodules. Elemental quantification in fungal structures was not possible. The distribution of elements was related to their symbiotic function. X-ray microanalysis can be efficiently applied for nutritional diagnosis in tripartite symbiosis.</AbstractText>
<CopyrightInformation>Copyright © 2016 Elsevier B.V. All rights reserved.</CopyrightInformation>
</Abstract>
<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Rodak</LastName>
<ForeName>Bruna Wurr</ForeName>
<Initials>BW</Initials>
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