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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Aguirre-Garrido, J. Félix Montiel-Lugo, Daniel Hernández-Rodríguez, César Torres-Cortes, Gloria Millán, Vicenta Toro, Nicolás Martínez-Abarca, Francisco Ramírez-Saad, Hugo C. |
| Spatial Coverage | Mexico |
| Abstract | The nature reserve of Tehuacan-Cuicatlan in central Mexico is known for its diversity and endemism mainly in cactus plants. Although the xerophytic flora is reasonably documented, the bacterial communities associated with these species have been largely neglected. We assessed the diversity and composition of bacterial communities in bulk (non-rhizospheric) soil and the rhizosphere of three cactus plant species: Mammillaria carnea, Opuntia pilifera and Stenocereus stellatus, approached using cultivation and molecular techniques, considering the possible effect of dry and rainy seasons. Cultivation-dependent methods were focused on putative N(2)-fixers and heterotrophic aerobic bacteria, in the two media tested the values obtained for dry season samples grouped together regardless of the sample type (rhizospheric or non-rhizospheric), these groups also included the non-rhizospheric sample for rainy season, on each medium. These CFU values were smaller and significantly different from those obtained on rhizospheric samples from rainy season. Genera composition among isolates of the rhizospheric samples was very similar for each season, the most abundant taxa being -Proteobacteria, Actinobacteria and Firmicutes. Interestingly, the genus Ochrobactrum was highly represented among rhizospheric samples, when cultured in N-free medium. The structure of the bacterial communities was approached with molecular techniques targeting partial 16S rRNA sequences such as denaturing gradient gel electrophoresis and serial analysis of ribosomal sequence tags. Under these approaches, the most represented bacterial phyla were Actinobacteria, Proteobacteria and Acidobacteria. The first two were also highly represented when using isolation techniques. |
| File Format | HTM / HTML |
| ISSN | 00036072 |
| Issue Number | 4 |
| Volume Number | 101 |
| e-ISSN | 15729699 |
| Journal | Antonie van Leeuwenhoek |
| Language | English |
| Publisher | Springer |
| Publisher Date | 2012-05-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Microbiology Discipline Immunology Bacteria Classification Isolation & Purification Biota Cactaceae Microbiology Plant Roots Rhizosphere Genetics Cluster Analysis Dna, Bacterial Chemistry Dna, Ribosomal Mexico Molecular Sequence Data Phylogeny Rna, Ribosomal, 16s Seasons Sequence Analysis, Dna Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Molecular Biology Microbiology |
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