New evidence for nitrogen fixation within the Italian white truffle Tuber magnatum

Barbieri, Elena; Ceccaroli, Paola; Saltarelli, Roberta; Guidi, Chiara; Potenza, Lucia; Basaglia, Marina; Fontana, Federico; Baldan, Enrico; Casella, Sergio; Ryahi, Ouafae; Zambonelli, Alessandra; Stocchi, Vilberto

doi:10.1016/j.funbio.2010.09.001

Cited by 96 publications

(97 citation statements)

References 30 publications

(34 reference statements)

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“…Pseudomonadales have been isolated in rice roots before (Watanabe et al 1987;Barraquio et al 1983) and were also found in forest soil using terminal restriction fragment length polymorphism method (Rösch and Bothe 2005). Moreover, the occurrence of nifH genes in Thioalkalispira microaerophila from the Chromatiales order was important in Italian white truffle Tuber (Barbieri et al 2010) and in a soda lake (Sorokin et al 2002). To our knowledge, we have found no evidence of published references where these two orders were detected in paddy soil before.…”

Section: Discussionmentioning

confidence: 97%

Abundance and diversity of nitrogen-fixing bacteria in rhizosphere and bulk paddy soil under different duration of organic management

Wang

Pablo

et al. 2011

World J Microbiol Biotechnol

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Denaturing gradient gel electrophoresis (DGGE) and quantitative real-time PCR (qPCR) approaches were used to assess respectively the molecular diversity and quantity of the nifH gene sequences in rhizosphere and bulk paddy soil under conventional management and different duration of organic management (2, 3, 5, 9 years). The phylogenetic distribution of clones based on nifH gene sequence showed that taxonomic groups were consisted of Alphaproteobacteria (27.6%), Betaproteobacteria (24.1%) and Gammaproteobacteria (48.3%). Members of the order Rhizobiales and Pseudomonadales were prevalent among the dominant diazotrophs. When the quantity of the nifH gene sequences was determined by qPCR, 2.27 × 10(5) to 1.14 × 10(6) copies/g of soil were detected. Except for 2 years organically managed soil, nifH gene copy numbers in organic soil, both rhizosphere and bulk, were significantly higher than in CM soil. Moreover, nifH gene copy numbers in the organic rhizosphere soil (3, 5, 9 years) were significantly higher than in bulk soil. The abundance and diversity of nitrogen-fixing bacteria tended to increase with duration of organic management but the highest number of nifH gene copies was observed in the rhizosphere and bulk soil of 5 years organic management. In addition, analysis of variance and canonical correspondence analysis (CCA) showed that C/N, C and N were important factors influencing the abundance and community structure of nitrogen-fixing bacterial.

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Section: Discussionmentioning

confidence: 97%

Abundance and diversity of nitrogen-fixing bacteria in rhizosphere and bulk paddy soil under different duration of organic management

Wang

Pablo

et al. 2011

World J Microbiol Biotechnol

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“…Some evidence even suggests an enhancement of cyanobacterial photosynthesis when it is engaged in the symbiosis (42). Nitrogen-fixing bacteria have also been isolated from mycorrhizal (including truffle) fungi and in the fungus gardens of leaf cutter ants, further suggesting positive inputs of endobacteria to fungal nutrition (21,252,310,380).…”

Section: Bacterial-fungal Molecular Interactions and Communicationmentioning

confidence: 99%

Bacterial-Fungal Interactions: Hyphens between Agricultural, Clinical, Environmental, and Food Microbiologists

Frey‐Klett

Burlinson

Deveau

et al. 2011

Microbiol Mol Biol Rev

719

531

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SUMMARY Bacteria and fungi can form a range of physical associations that depend on various modes of molecular communication for their development and functioning. These bacterial-fungal interactions often result in changes to the pathogenicity or the nutritional influence of one or both partners toward plants or animals (including humans). They can also result in unique contributions to biogeochemical cycles and biotechnological processes. Thus, the interactions between bacteria and fungi are of central importance to numerous biological questions in agriculture, forestry, environmental science, food production, and medicine. Here we present a structured review of bacterial-fungal interactions, illustrated by examples sourced from many diverse scientific fields. We consider the general and specific properties of these interactions, providing a global perspective across this emerging multidisciplinary research area. We show that in many cases, parallels can be drawn between different scenarios in which bacterial-fungal interactions are important. Finally, we discuss how new avenues of investigation may enhance our ability to combat, manipulate, or exploit bacterial-fungal complexes for the economic and practical benefit of humanity as well as reshape our current understanding of bacterial and fungal ecology.

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“…Barbieri et al (2010) detected the expression of the nitrogenase gene nifH from Bradyrhizobia in T. magnatum ascocarps; they found that the nitrogenase activity assessed by acetylene reduction was comparable to that of young legume nodules. Antony-Babu et al (2014) proved that T. melanosporum ascocarps are extensively colonized by Bradyrhizobiaceae.…”

Section: Why Does It Take Several Years For Ascocarp Production To Bementioning

confidence: 99%

Certainties and uncertainties about the life cycle of the Périgord black truffle (Tuber melanosporum Vittad.)

Tacon

Rubini

Murat

et al. 2016

Annals of Forest Science

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Abstract• Key message Several aspects of the life cycle of the Périgord black truffle have been elucidated only recently, while others remain either controversial or unstudied. In this paper, we present a revised life cycle of this fungus and highlight key aspects that have yet to be addressed or require further understanding.• Context The hypogeous sporophores of several Tuber species, renowned for their aromatic and gustatory qualities, are widely commercialized. One of the most valuable species is Tuber melanosporum Vittad., the Périgord black truffle also known as "the black diamond". However, many aspects of T. melanosporum life cycle remain unsolved. • Aims In this work, we examine past and recent findings on the life cycle of T. melanosporum, currently regarded as a model system for Tuber species, with the view of highlighting aspects of its life cycle which remain unsolved.• Results Several aspects of its life cycle have recently been elucidated (i.e. characterization of two mating type genes, heterothallism, prevalence of sexual reproduction on vegetative propagation, exclusion of one mating type by its opposite on ectomycorrhizas, dependency of ascocarps on their host for carbon allocation), while others remain unaddressed.

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New evidence for nitrogen fixation within the Italian white truffle Tuber magnatum

Cited by 96 publications

References 30 publications

Abundance and diversity of nitrogen-fixing bacteria in rhizosphere and bulk paddy soil under different duration of organic management

Abundance and diversity of nitrogen-fixing bacteria in rhizosphere and bulk paddy soil under different duration of organic management

Bacterial-Fungal Interactions: Hyphens between Agricultural, Clinical, Environmental, and Food Microbiologists

Certainties and uncertainties about the life cycle of the Périgord black truffle (Tuber melanosporum Vittad.)

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