Structure and dynamics of experimentally introduced and naturally occurring Laccaria sp. discrete genotypes in a Douglas fir plantation

Article Abstract:

The response of Laccaria populations to outplanting of Douglas firs that were nursery-inoculated with a French strain, L bicolor 81306, and planted in another portion of the Saint-Brisson population was assessed. Of specific concern were the persistence of the nursery-inoculated strain L bicolor 81306, its effect on the indigenous genetic diversity and the fine-scale genetic structure of the population under surrounding uninoculated trees. Results revealed that inoculant L bicolor strains persist without selfing and cytoplasmic introgression after outplanting of the host trees. Moreover, the fate of inoculant strains depends more on unknown local factors and less on their geographic origin.

Mycorrhizas, Mycorrhizae, Douglas fir

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Molecular microbial diversity in soils from Eastern Amazonia: evidence for unusual microorganisms and microbial population shifts associated with deforestation

Article Abstract:

The molecular microbial diversity in soils from Eastern Amazonia was studied to provide evidence for unusual microorganisms and microbial population shifts associated with deforestation. The study utilized analyses of the small-subunit ribosomal RNA genes to examine microbial diversity in eastern Amazonian soils. Results reveal that the microbial diversity in the area is immense since the clones sequenced were duplicates and none of which were previously described.

Deforestation, Amazon River region

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Spatial and temporal population dynamics of a naturally occurring two-species microbial community inside the digestive tract of the medicinal leech

Article Abstract:

A study was conducted to investigate spatial and temporal changes of localization and community structure of Aeromonas veronii and Rikenella-like bacteria in the crop after ingestion of a sterile blood meal by using fluorescence in situ hybridization (FISH). The sizes of the mixed microcolonies were consistently larger than the size of either single-species microscopy, suggesting a synergistic interaction of the symbionts.

Science & research, Analysis, Physiological aspects, In situ hybridization, Leeches

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