[Associative cyanobacteria isolated from the roots of epiphytic orchids].
Identifieur interne : 003834 ( Main/Exploration ); précédent : 003833; suivant : 003835[Associative cyanobacteria isolated from the roots of epiphytic orchids].
Auteurs : E A Tsavkelova [Russie] ; E S Lobakova ; G L Kolome Tseva ; T A Cherdyntseva ; A I NetrusovSource :
- Mikrobiologiia [ 0026-3656 ]
Descripteurs français
- KwdFr :
- MESH :
- isolement et purification : Cyanobactéries, Mycorhizes.
- microbiologie : Orchidaceae, Racines de plante.
- physiologie : Cyanobactéries.
- Fixation de l'azote, Spécificité d'espèce, Symbiose.
English descriptors
- KwdEn :
- MESH :
- isolation & purification : Cyanobacteria, Mycorrhizae.
- microbiology : Orchidaceae, Plant Roots.
- physiology : Cyanobacteria.
- Nitrogen Fixation, Species Specificity, Symbiosis.
Abstract
Associative cyanobacteria were isolated from the rhizoplane and velamen of the aerial roots of the epiphytic orchids Acampe papillosa, Phalaenopsis amabilis, and Dendrobium moschatum and from the substrate roots of Acampe papillosa and Dendrobium moschatum. Cyanobacteria were isolated on complete and nitrogen-free variants of BG-11 medium. On all media and in all samples, cyanobacteria of the genus Nostoc predominated. Nostoc, Anabaena, and Calothrix were isolated from the surface of the A. papillosa aerial roots, whereas the isolates from the substrate roots were Nostoc, Oscillatoria, and representatives of the LPP-group (Lyngbia, Phormidium, and Plectonema, incapable of nitrogen fixation). On the D. moschatum substrate roots, Nostoc and LPP-group representatives were also found, as well as Fischerella. On the aerial roots of P. amabilis and D. phalaenopsis grown in a greenhouse simulating the climate of moist tropical forest, cyanobacteria were represented by Nostoc, LPP-group, and Scytonema in the D. phalaenopsis and by Nostoc, Scytonema, Calothrix, Spirulina, Oscillatoria, and the LPP-group in P. amabilis. For D. moschatum, the spectra of cyanobacteria populating the substrate root zhizophane and the substrate (pine bark) were compared. In the parenchyma of the aerial roots of P. amabilis, fungal hyphae and/or their half-degraded remains were detected, which testifies to the presence of mycorrhizal fungi this plant. This phenomenon is attributed to the presence of a sheath formed by cyanobacteria and serving as a substrate for fungi.
PubMed: 12698800
Affiliations:
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L" sort="Kolome Tseva, G L" uniqKey="Kolome Tseva G" first="G L" last="Kolome Tseva">G L Kolome Tseva</name></author><author><name sortKey="Cherdyntseva, T A" sort="Cherdyntseva, T A" uniqKey="Cherdyntseva T" first="T A" last="Cherdyntseva">T A Cherdyntseva</name></author><author><name sortKey="Netrusov, A I" sort="Netrusov, A I" uniqKey="Netrusov A" first="A I" last="Netrusov">A I Netrusov</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2003">2003 Jan-Feb</date><idno type="RBID">pubmed:12698800</idno><idno type="pmid">12698800</idno><idno type="wicri:Area/Main/Corpus">003941</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">003941</idno><idno type="wicri:Area/Main/Curation">003941</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">003941</idno><idno type="wicri:Area/Main/Exploration">003941</idno></publicationStmt><sourceDesc><biblStruct><analytic><title 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purification)</term><term>Cyanobactéries (physiologie)</term><term>Fixation de l'azote (MeSH)</term><term>Mycorhizes (isolement et purification)</term><term>Orchidaceae (microbiologie)</term><term>Racines de plante (microbiologie)</term><term>Spécificité d'espèce (MeSH)</term><term>Symbiose (MeSH)</term></keywords><keywords scheme="MESH" qualifier="isolation & purification" xml:lang="en"><term>Cyanobacteria</term><term>Mycorrhizae</term></keywords><keywords scheme="MESH" qualifier="isolement et purification" xml:lang="fr"><term>Cyanobactéries</term><term>Mycorhizes</term></keywords><keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Orchidaceae</term><term>Racines de plante</term></keywords><keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Orchidaceae</term><term>Plant Roots</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Cyanobactéries</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Cyanobacteria</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Nitrogen Fixation</term><term>Species Specificity</term><term>Symbiosis</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Fixation de l'azote</term><term>Spécificité d'espèce</term><term>Symbiose</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Associative cyanobacteria were isolated from the rhizoplane and velamen of the aerial roots of the epiphytic orchids Acampe papillosa, Phalaenopsis amabilis, and Dendrobium moschatum and from the substrate roots of Acampe papillosa and Dendrobium moschatum. Cyanobacteria were isolated on complete and nitrogen-free variants of BG-11 medium. On all media and in all samples, cyanobacteria of the genus Nostoc predominated. Nostoc, Anabaena, and Calothrix were isolated from the surface of the A. papillosa aerial roots, whereas the isolates from the substrate roots were Nostoc, Oscillatoria, and representatives of the LPP-group (Lyngbia, Phormidium, and Plectonema, incapable of nitrogen fixation). On the D. moschatum substrate roots, Nostoc and LPP-group representatives were also found, as well as Fischerella. On the aerial roots of P. amabilis and D. phalaenopsis grown in a greenhouse simulating the climate of moist tropical forest, cyanobacteria were represented by Nostoc, LPP-group, and Scytonema in the D. phalaenopsis and by Nostoc, Scytonema, Calothrix, Spirulina, Oscillatoria, and the LPP-group in P. amabilis. For D. moschatum, the spectra of cyanobacteria populating the substrate root zhizophane and the substrate (pine bark) were compared. In the parenchyma of the aerial roots of P. amabilis, fungal hyphae and/or their half-degraded remains were detected, which testifies to the presence of mycorrhizal fungi this plant. This phenomenon is attributed to the presence of a sheath formed by cyanobacteria and serving as a substrate for fungi.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">12698800</PMID><DateCompleted><Year>2003</Year><Month>07</Month><Day>10</Day></DateCompleted><DateRevised><Year>2006</Year><Month>11</Month><Day>15</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0026-3656</ISSN><JournalIssue CitedMedium="Print"><Volume>72</Volume><Issue>1</Issue><PubDate><MedlineDate>2003 Jan-Feb</MedlineDate></PubDate></JournalIssue><Title>Mikrobiologiia</Title><ISOAbbreviation>Mikrobiologiia</ISOAbbreviation></Journal><ArticleTitle>[Associative cyanobacteria isolated from the roots of epiphytic orchids].</ArticleTitle><Pagination><MedlinePgn>105-10</MedlinePgn></Pagination><Abstract><AbstractText>Associative cyanobacteria were isolated from the rhizoplane and velamen of the aerial roots of the epiphytic orchids Acampe papillosa, Phalaenopsis amabilis, and Dendrobium moschatum and from the substrate roots of Acampe papillosa and Dendrobium moschatum. Cyanobacteria were isolated on complete and nitrogen-free variants of BG-11 medium. On all media and in all samples, cyanobacteria of the genus Nostoc predominated. Nostoc, Anabaena, and Calothrix were isolated from the surface of the A. papillosa aerial roots, whereas the isolates from the substrate roots were Nostoc, Oscillatoria, and representatives of the LPP-group (Lyngbia, Phormidium, and Plectonema, incapable of nitrogen fixation). On the D. moschatum substrate roots, Nostoc and LPP-group representatives were also found, as well as Fischerella. On the aerial roots of P. amabilis and D. phalaenopsis grown in a greenhouse simulating the climate of moist tropical forest, cyanobacteria were represented by Nostoc, LPP-group, and Scytonema in the D. phalaenopsis and by Nostoc, Scytonema, Calothrix, Spirulina, Oscillatoria, and the LPP-group in P. amabilis. For D. moschatum, the spectra of cyanobacteria populating the substrate root zhizophane and the substrate (pine bark) were compared. In the parenchyma of the aerial roots of P. amabilis, fungal hyphae and/or their half-degraded remains were detected, which testifies to the presence of mycorrhizal fungi this plant. 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