Nitrogen-fixing bacteria in Douglas-fir residue decayed byFomitopsis pinicola

Spanó, Saulo; Jürgensen, Martin F.; Larsen, Michael; Harvey, A. E.

doi:10.1007/bf02374731

Cited by 38 publications

(20 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(16s1-35, 16s2-15 and 16s3-2), Hyphomicrobiaceae bacterium (16s3-8), Rhizobium (16s1-19) and Bradyrhizobium (16s3-26) (Hiraushi and Ueda 1994;Ragatz et al 1994;Jones et al 2007). These results support previous findings that these bacteria are a common component of the microflora active in cellulose decay (Spano et al 1982). Among the other phylotypes, 16s3-35 was related to Caulobacter; 16s2-51 was clustered with Sphingomonas sp.…”

Section: Soil Characteristicssupporting

confidence: 92%

Microbial community structure and diversity in a native forest wood-decomposed hollow-stump ecosystem

Tian

Huang

et al. 2009

World J Microbiol Biotechnol

View full text Add to dashboard Cite

The aim of this study is to investigate the microbial community structure and diversity in a wooddecomposed hollow-stump ecosystem. Microbial communities of SD-1, a lateritic soil sample from forest hollowstump ecosystems in Fuzhou (a southeastern coast city of China), were characterized by constructing and analyzing rRNA gene clone libraries. Sixty-six phylotypes were identified from 112 bacterial clones, including Acidobacteria (71.5%), Proteobacteria (24.1%) and Verrucomicrobia (0.9%). A total of 40 phylotypes were obtained from 138 fungal clones, including Basidiomycota (42.8%), Ascomycota (36.2%), Zygomycota (13.8%), Chytridiomycota (2.9%) and Fungi incertae sedis (4.3%). The results showed a variety of clones related to the reported lignocellulosedecomposing microorganisms. They included some important bacterial decomposers, such as Sphingomonas and Burkholderia, and a number of wood-decaying fungi, including Tricholomataceae, Strophariaceae and Agaricaceae of Basidiomycota; Orbilia, Aspergillus, Phialocephala, Epicoccum and Phoma of Ascomycota and Mucorales of Zygomycota. The result indicated that the lignocellulolytic microorganisms worked synergically with a unique community structure to biodegrade lignocellulose in the hollowstump ecosystem.

show abstract

Section: Soil Characteristicssupporting

confidence: 92%

Microbial community structure and diversity in a native forest wood-decomposed hollow-stump ecosystem

Tian

Huang

et al. 2009

World J Microbiol Biotechnol

View full text Add to dashboard Cite

show abstract

“…This was probably due to Fig. [37,38] suggesting that these associated microrganisms could play a role in the fungal growth or nutrition during ascocarp development. Phylogenetic tree for representative 16S rRNA gene sequences of gamma-Proteobacteria from Tuber borchii ascocarp based on nearly complete 16S rRNA sequences (highlighted in bold are the clone sequences, while those with an asterisk are sequences from the culturable bacteria).…”

Section: Discussionmentioning

confidence: 99%

New evidence for bacterial diversity in the ascoma of the ectomycorrhizal fungusTuber borchiiVittad.

Barbieri

Bertini

Rossi

et al. 2005

FEMS Microbiology Letters

113

115

View full text Add to dashboard Cite

The microbial community associated with ascocarps of the ectomycorrhizal fungus Tuber borchii Vittad. was studied by both cultivation and direct extraction of bacterial 16S rRNA gene (rDNA) sequence approaches. The inner part of six T. borchii ascoma collected in North-Central Italy was used to establish a bacterial culture collection and to extract the total genomic DNA to obtain a library of 16S rDNAs representative of the truffle bacterial community. Most of the isolates were affiliated to the gamma-Proteobacteria, mainly Fluorescent pseudomonads; some isolates were members of the Bacteroidetes group and Gram-positive bacteria, mostly Bacillaceae. The majority of the clones from the library were alpha-Proteobacteria showing significant similarity values, of greater than 97%, with members of the Sinorhizobium/Ensifer Group, Rhizobium and Bradyrhizobium spp. not previously identified as Tuber-associated bacteria. Only a few bacterial strains belonging to this bacterial subclass were found in the culture collection and isolated on a medium specific for Rhizobium-like organisms. A few clones were members of the beta- and gamma-Proteobacteria; as well as low and high G+C Gram-positive bacteria. Our findings clearly indicate that a dual approach increases the information obtained on the structural composition of a truffle bacterial community as compared to that derived via cultivation or direct recovery of 16S rDNA sequences alone.

show abstract

“…Moreover, the provision by MHB of reduced nitrogen acquired via nitrogen fixation is also likely to play a stimulatory role in growth or mycorrhization by mycorrhizal fungi (Garbaye, 1994). Early research had already shown the presence of nitrogen‐fixing bacteria in the fruiting bodies of different ectomycorrhizal fungi (Spano et al , 1982). This suggested a role for these bacteria in nitrogen provision, supporting fungal growth during ascocarp development.…”

Section: Effects Of Bacteria On (Mycorrhizal) Fungi In Soilmentioning

confidence: 99%

Mechanisms that promote bacterial fitness in fungal-affected soil microhabitats

Nazir

Warmink

Boersma

et al. 2010

FEMS Microbiology Ecology

193

143

View full text Add to dashboard Cite

Soil represents a very heterogeneous environment for its microbiota. Among the soil inhabitants, bacteria and fungi are important organisms as they are involved in key biogeochemical cycling processes. A main energy source driving the system is formed by plants through the provision of plant-fixed (reduced) carbon to the soil, whereas soil nitrogen and phosphorus may move from the soil back to the plant. The carbonaceous compounds released form the key energy and nutrient sources for the soil microbiota. In the grossly carbon-limited soil, the emergence of plant roots and the formation of their associated mycorrhizae thus create nutritional hot spots for soil-dwelling bacteria. As there is natural (fitness) selection on bacteria in the soil, those bacteria that are best able to benefit from the hot spots have probably been selected. The purpose of this review is to examine the interactions of bacteria with soil fungi in these hot spots and to highlight the key mechanisms involved in the selection of fungal-responsive bacteria. Salient bacterial mechanisms that are involved in these interactions have emerged from this examination. Thus, the efficient acquisition for specific released nutrients, the presence of type-III secretion systems and the capacity of flagellar movement and to form a biofilm are pinpointed as key aspects of bacterial life in the mycosphere. The possible involvement of functions present on plasmid-borne genes is also interrogated.

show abstract

Nitrogen-fixing bacteria in Douglas-fir residue decayed byFomitopsis pinicola

Cited by 38 publications

References 15 publications

Microbial community structure and diversity in a native forest wood-decomposed hollow-stump ecosystem

Microbial community structure and diversity in a native forest wood-decomposed hollow-stump ecosystem

New evidence for bacterial diversity in the ascoma of the ectomycorrhizal fungusTuber borchiiVittad.

Mechanisms that promote bacterial fitness in fungal-affected soil microhabitats

Contact Info

Product

Resources

About