Ectomycorrhizal diversity enhances growth and nitrogen fixation of Acacia mangium seedlings

Diagne, Nathalie; Thioulouse, Jean; Sanguin, Hervé; Prin, Yves; Krasova-Wade, Tatiana; Sylla, Samba Ndao; Galiana, Antoine; Baudoin, Ezékiel; Neyra, Marc; Svistoonoff, Sergio; Lebrun, Michel; Duponnois, Robin

doi:10.1016/j.soilbio.2012.08.030

Cited by 40 publications

(39 citation statements)

References 59 publications

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“…As hypothesized, mycorrhizal inoculation promoted a higher growth of aerial structures of cork oak seedlings, which is in agreement with Moussain et al (2013), they evaluated the effect of Pisolithus tinctorius inoculation on shoot systems of nursery cork oak seedlings; again, the positive effect of mycorrhizal fungi inoculation in seedling growth was verified mainly through a significant increase in leaf area and dry weight. Our outcomes were also in accordance with results observed for other tree species (e.g., Diagnea et al (2013) for Acacia mangnium seedlings and Wu et al (2011) for peach seedlings). However in our study, data for aboveground evaluation showed no significant differences between inoculated and fertilised seedlings (FM treatment) and inoculated and fertilised seedlings subjected to a supply of amino acids (FAM treatment).…”

Section: Discussionsupporting

confidence: 93%

“…However for the inoculated seedlings subjected to fertilisation and amino acids (FAM treatment), a slightly increase was observed on root biomass, expressed through dry weight. In contrast, Diagnea et al (2013) observed that mycorrhizal fungi enhance root biomass for 4 months-old Acacia mangnium seedlings. In our study, we verified that root biomass after 30 months-old cork oak seedlings were not affected by none of the treatments applied.…”

Section: Discussionmentioning

confidence: 79%

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Cork Oak Seedling Growth under Different Soil Conditions from Fertilisation, Mycorrhizal Fungi and Amino Acid Application

Dinis

Surový²,

Ribeiro³

et al. 2015

JAS

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Regeneration process deals with some constrains related with the livestock management, pasture rotations, and dependence of a sequence of favourable climatic years, among others, which can lead to a continuous delay in the initiation of the regeneration process. The purpose of this study is to promote an increase of cork oak seedling growth in order to decrease the time required for regeneration and also to contribute to avoid the effect of post-transplant stress on cork oak. With this objective, a study was carried out on a greenhouse, where the effect of fertilisation, mycorrhizal fungi inoculation, and amino acid supply were tested. Results showed that cork oak seedling capability to growth, expressed as total seedling dry weight, was positively affected by treatments, except when only fertilisation was applied. We verified that cork oak seedlings inoculated with mycorrhizal fungi presented better results in terms of aerial structures growth. Any of the treatments was suitable to contribute positively for tap root and total belowground dry weight accumulation. Only fine roots structures were sensitive to treatments effects; it was verified that both inoculated and non-inoculated seedlings subjected to fertilisation were capable to invest largely on the production of these structures (33 and 30%, respectively). To reinforce the cork oak seedling growth, the equilibrium between fertilisers and mycorrhizal fungi inoculation would probably be the better option to enhance the cork oak regeneration process. Thus, the balance between shoot and root systems growth would be guaranteed, fertilisation mainly for root system and mycorrhizal fungi inoculation for shoot growth.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 79%

Cork Oak Seedling Growth under Different Soil Conditions from Fertilisation, Mycorrhizal Fungi and Amino Acid Application

Dinis

Surový²,

Ribeiro³

et al. 2015

JAS

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“…; Diagne et al . ), which in some cases likely reflects the capacity of mycorrhizas to access different nutrient pools (Smith, Jakobsen & Smith ; Jansa, Smith & Smith ). While it is possible that rhizobial complementarity would have been evident under different environmental conditions, it seems more likely that the contrast between rhizobia and mycorrhizas can be attributed to differences in potential for complementarity among these organisms.…”

Section: Discussionmentioning

confidence: 99%

Partner diversity and identity impacts on plant productivity in Acacia–rhizobial interactions

et al. 2014

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Summary1. Genetic variation for functionally important traits is ubiquitous in communities of nitrogen-fixing rhizobia, and while some studies have described significant effects of diversity on the functioning of plant-associated microbial communities, we lack a systematic test of how rhizobial diversity influences plant productivity. 2. The complexity of potential interactions among rhizobia and plants complicates the development of general predictions regarding causal relationships between rhizobial diversity and plant productivity. For example, while rhizobial complementarity may result in positive associations between symbiont diversity and plant productivity, antagonistic competition may reduce rhizobial community function. 3. Using two widespread native Australian Acacia species (A. salicina, A. stenophylla) and experimental rhizobial communities derived from 16 bacterial genotypes naturally associated with these hosts, we examined how the provision of mutualistic benefit varies with rhizobial identity, diversity and phylogenetic relatedness. 4. Analysis of plant performance in relation to rhizobial genotypic richness revealed that the presence of multiple rhizobial genotypes in the rhizosphere was associated with a general decrease in plant productivity compared to growth with single rhizobial genotypes. Importantly, these results appear to be robust in the face of variation in host identity and host diversity (i.e. one or two species mixtures). We also found that rhizobial genotypic identity and host species significantly influenced plant productivity in Acacia-rhizobia interactions, both in single-and multistrain inoculations. 5. Synthesis. Together, our data show that multiple rhizobia interacting with a single host species creates opportunities for emergent or higher-order effects that extend beyond those that could be simply predicted based upon outcomes of pairwise interactions and that increased mutualist diversity does not necessarily translate into positive effects on plant growth.

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“…; Diagne et al . ; Pena & Polle ). Importantly, these documented benefits of EM fungal diversity are often context dependent, with stronger host growth responses to EM fungal diversity occurring in more stressful environmental conditions (Jonsson et al .…”

Section: Introductionmentioning

confidence: 99%

Ectomycorrhizal fungal richness declines towards the host species’ range edge

Lankau

Keymer

2016

Molecular Ecology

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Plant range boundaries are generally considered to reflect abiotic conditions; however, a rise in negative or decline in positive species interactions at range margins may contribute to these stable boundaries. While evidence suggests that pollinator mutualisms may decline near range boundaries, little is known about other important plant mutualisms, including microbial root symbionts. Here, we used molecular methods to characterize root-associated fungal communities in populations of two related temperate tree species from across the species' range in the eastern United States. We found that ectomycorrhizal fungal richness on plant roots declined with distance from the centre of the host species range. These patterns were not evident in nonmycorrhizal fungal communities on roots nor in fungal communities in bulk soil. Climatic and soil chemical variables could not explain these biogeographic patterns, although these abiotic gradients affected other components of the bulk soil and rhizosphere fungal community. Depauperate ectomycorrhizal fungal communities may represent an underappreciated challenge to marginal tree populations, especially as rapid climate change pushes these populations outside their current climate niche.

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Ectomycorrhizal diversity enhances growth and nitrogen fixation of Acacia mangium seedlings

Cited by 40 publications

References 59 publications

Cork Oak Seedling Growth under Different Soil Conditions from Fertilisation, Mycorrhizal Fungi and Amino Acid Application

Cork Oak Seedling Growth under Different Soil Conditions from Fertilisation, Mycorrhizal Fungi and Amino Acid Application

Partner diversity and identity impacts on plant productivity in Acacia–rhizobial interactions

Ectomycorrhizal fungal richness declines towards the host species’ range edge

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