MycorrhizaeV1, Main, Corpus, bibRecord, 003388

Mitochondrial large ribosomal subunit sequences are homogeneous within isolates of Glomus (arbuscular mycorrhizal fungi, Glomeromycota).

Identifieur interne : 003388 ( Main/Corpus ); précédent : 003387; suivant : 003389

Mitochondrial large ribosomal subunit sequences are homogeneous within isolates of Glomus (arbuscular mycorrhizal fungi, Glomeromycota).

Auteurs : Philipp A. Raab ; Annemarie Brennwald ; Dirk Redecker

Source :

Mycological research [ 0953-7562 ] ; 2005.

RBID : pubmed:16353632

English descriptors

KwdEn :
- Base Sequence (MeSH), DNA, Fungal (chemistry), DNA, Mitochondrial (chemistry), DNA, Ribosomal (chemistry), Evolution, Molecular (MeSH), Exons (MeSH), Introns (MeSH), Molecular Sequence Data (MeSH), Mycorrhizae (classification), Mycorrhizae (genetics), Phylogeny (MeSH), Sequence Analysis, DNA (MeSH), Sequence Homology, Nucleic Acid (MeSH).
MESH :
- chemical , chemistry : DNA, Fungal, DNA, Mitochondrial, DNA, Ribosomal.
- classification : Mycorrhizae.
- genetics : Mycorrhizae.
- Base Sequence, Evolution, Molecular, Exons, Introns, Molecular Sequence Data, Phylogeny, Sequence Analysis, DNA, Sequence Homology, Nucleic Acid.

Abstract

Partial sequences of the mtLSU rDNA were obtained from the arbuscular mycorrhizal (AM) fungi Glomus proliferum (isolate DAOM 226389) and G. intraradices (isolates JJ291 and BEG75). The exon sequences of the two species showed regions of strong divergence. There was no evidence of intra-isolate sequence heterogeneity as it is found in variable regions of nuclear ribosomal genes of Glomeromycota. In G. intraradices JJ291, two introns were found in the partial LSU sequence. One of the introns contained an ORF for a putative site-specific homing endonuclease of the LAGLIDADG family. In G. intraradices BEG75, one of the introns was missing and the other had a DNA sequence distinct from JJ291. G. proliferum had no introns in the region sequenced. A PCR primer was designed to amplify the fragment of the mtLSU of a different, distinguishable G. intraradices genotype from colonized roots of a field sample. These mitochondrial gene sequences are the first reported from the phylum Glomeromycota. Our findings indicate that the intra-individual sequence heterogeneity of the Glomeromycota may be a peculiar feature of the nuclear genes. Therefore, mtLSU and its introns have the potential to be highly sensitive genetic markers for these fungi in the future.

DOI: 10.1017/s0953756205003977
PubMed: 16353632

Links to Exploration step

pubmed:16353632

Le document en format XML

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<term>Evolution, Molecular (MeSH)</term>
<term>Exons (MeSH)</term>
<term>Introns (MeSH)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Mycorrhizae (classification)</term>
<term>Mycorrhizae (genetics)</term>
<term>Phylogeny (MeSH)</term>
<term>Sequence Analysis, DNA (MeSH)</term>
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<front><div type="abstract" xml:lang="en">Partial sequences of the mtLSU rDNA were obtained from the arbuscular mycorrhizal (AM) fungi Glomus proliferum (isolate DAOM 226389) and G. intraradices (isolates JJ291 and BEG75). The exon sequences of the two species showed regions of strong divergence. There was no evidence of intra-isolate sequence heterogeneity as it is found in variable regions of nuclear ribosomal genes of Glomeromycota. In G. intraradices JJ291, two introns were found in the partial LSU sequence. One of the introns contained an ORF for a putative site-specific homing endonuclease of the LAGLIDADG family. In G. intraradices BEG75, one of the introns was missing and the other had a DNA sequence distinct from JJ291. G. proliferum had no introns in the region sequenced. A PCR primer was designed to amplify the fragment of the mtLSU of a different, distinguishable G. intraradices genotype from colonized roots of a field sample. These mitochondrial gene sequences are the first reported from the phylum Glomeromycota. Our findings indicate that the intra-individual sequence heterogeneity of the Glomeromycota may be a peculiar feature of the nuclear genes. Therefore, mtLSU and its introns have the potential to be highly sensitive genetic markers for these fungi in the future.</div>
</front>
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<Abstract><AbstractText>Partial sequences of the mtLSU rDNA were obtained from the arbuscular mycorrhizal (AM) fungi Glomus proliferum (isolate DAOM 226389) and G. intraradices (isolates JJ291 and BEG75). The exon sequences of the two species showed regions of strong divergence. There was no evidence of intra-isolate sequence heterogeneity as it is found in variable regions of nuclear ribosomal genes of Glomeromycota. In G. intraradices JJ291, two introns were found in the partial LSU sequence. One of the introns contained an ORF for a putative site-specific homing endonuclease of the LAGLIDADG family. In G. intraradices BEG75, one of the introns was missing and the other had a DNA sequence distinct from JJ291. G. proliferum had no introns in the region sequenced. A PCR primer was designed to amplify the fragment of the mtLSU of a different, distinguishable G. intraradices genotype from colonized roots of a field sample. These mitochondrial gene sequences are the first reported from the phylum Glomeromycota. Our findings indicate that the intra-individual sequence heterogeneity of the Glomeromycota may be a peculiar feature of the nuclear genes. Therefore, mtLSU and its introns have the potential to be highly sensitive genetic markers for these fungi in the future.</AbstractText>
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Mitochondrial large ribosomal subunit sequences are homogeneous within isolates of Glomus (arbuscular mycorrhizal fungi, Glomeromycota).

Mitochondrial large ribosomal subunit sequences are homogeneous within isolates of Glomus (arbuscular mycorrhizal fungi, Glomeromycota).

Source :

English descriptors

Abstract

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki