Impact of plant species and site on rhizosphere-associated fungi antagonistic to Verticillium dahliae kleb

Article Abstract:

The effects of the plant species and the site on the abundance and composition of fungi with antagonistic activity toward Verticillium dahliae were isolated and analyzed from oilseed rape and strawberry rhizosphere and bulk soil from three different locations in Germany over two growing seasons. It was found that the diversity of rhizosphere-associated antagonists was lower than that of antagonists in bulk soil, suggesting that some fungi were specifically enriched in each rhizosphere.

Biological diversity, Biodiversity, Plant populations, Verticillium

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Diversity of ndo genes in mangrove sediments exposed to different sources of polycyclic aromatic hydrocarbon pollution

Article Abstract:

The composition and relative abundance are examined in the sediment bacterial communities of naphthalene dioxygenase (ndo) genes, which are important for bacterial adaptation to environmental polycyclic aromatic hydrocarbon (PAH) contamination. The long-term impact of PAH contamination has affected the abundance and diversity of ndo genes in sediments of urban mangroves.

Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Aromatic Hydrocarbons, Mangrove plants, Mangroves (Plants)

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Dynamics of fungal communities in bulk and maize rhizosphere soil in the tropics

Article Abstract:

The fungal population dynamics in the rhizosphere of tropically grown maize indicate that the rhizospheres of young plants appear to choose Ascomycetes order Pleosporales, whereas rhizospheres of senescent plants are found to be associated with different members of the Ascomycetes and basidiomycetic yeast as determined by sequence similarities of the 18S rDNA.

Brazil, Analysis, Physiological aspects, Nucleotide sequence, Base sequence, Soil microbiology, Plant-pathogen relationships, Composition, Rhizosphere

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