Asteropeia mcphersonii, a potential mycorrhizal facilitator for ecological restoration in Madagascar wet tropical rainforests

Henry, Charline; Raivoarisoa, Jeanne-Françoise; Razafimamonjy, Angélo; Ramanankierana, Heriniaina; Andrianaivomahefa, Paul; Selosse, Marc‐André; Ducousso, Marc

doi:10.1016/j.foreco.2015.09.017

Cited by 14 publications

(22 citation statements)

References 53 publications

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“…The few species of ascomycetes detected may be due to their specific ecological requirements more than a methodological issue (see Tedersoo & Smith 2013). Previous studies in tropical ecosystems also found low diversity of EM ascomycetes (Peay et al 2010, Smith et al 2011, Henry et al 2015. Among the 16 discovered EM fungal lineages, /tuber-helvella (one OTU, GenBank accession number KR819045) had not previously been reported from an African tropical forest, to the best of our knowledge (see Tedersoo et al 2007, 2010a, Bâ et al 2012.…”

Section: Discussionmentioning

confidence: 78%

“…Similarly, a recent origin of the EM symbiosis and/or stress conditions may reduce the fungal diversity (S ene et al 2015). Finally, the lack of difference in richness of EM fungal taxa between the mixed and monodominant forests may, in part, be due to the dominance of generalist EM fungi (Onguene & Kuyper 2002, Richard et al Di edhiou et al 2010, Henry et al 2015.…”

Section: Resultsmentioning

confidence: 99%

“…In mixed forests of Madagascar, 88 percent of ECMs from adults are formed by EM fungal taxa also found on seedlings, but they encompass less than a half of the taxonomic diversity (Henry et al . ). In a mixed tropical rain forest in Guinea, EM fungi shared by adults and seedlings represent 79 percent of the EM colonization (Diédhiou et al .…”

Section: Discussionmentioning

confidence: 97%

“…, Henry et al . , ). Among the 16 discovered EM fungal lineages, /tuber‐helvella (one OTU, GenBank accession number ) had not previously been reported from an African tropical forest, to the best of our knowledge (see Tedersoo et al .…”

Section: Discussionmentioning

confidence: 99%

“…For instance, adults and seedlings of monodominant Coccoloba uvifera forests share three EM fungal taxa representing 80 percent of the EM colonization (S ene et al 2015). In mixed forests of Madagascar, 88 percent of ECMs from adults are formed by EM fungal taxa also found on seedlings, but they encompass less than a half of the taxonomic diversity (Henry et al 2015). In a mixed tropical rain forest in Guinea, EM fungi shared by adults and seedlings represent 79 percent of the EM colonization (Di edhiou et al 2010).…”

Section: Discussionmentioning

confidence: 99%

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Ectomycorrhizal fungi are shared between seedlings and adults in a monodominant Gilbertiodendron dewevrei rain forest in Cameroon

Ebenye

Taudière

Niang³

et al. 2016

Biotropica

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Ectomycorrhizal networks may facilitate the establishment and survival of seedlings regenerating under the canopies of tropical forests and are often invoked as a potential contributor to monodominance. We identified ectomycorrhizal fungi in a monodominant Gilbertiodendron dewevrei (Fabaceae) rain forest in Cameroon, using sporocarps and ectomycorrhizae of three age categories (seedlings, intermediate trees, and large trees) and tentatively revealed nutrient transfer through ectomycorrhizal networks by measuring spontaneous isotopic (13C and 15N) abundances in seedlings. Sporocarp surveys revealed fewer ectomycorrhizal fungal taxa (59 species from 1030 sporocarps) than molecular barcoding of ectomycorrhizal roots (75 operational taxonomic units from 828 ectomycorrhizae). Our observations suggest that ectomycorrhizal fungal diversity is similar to that in other mixed tropical forests and provide the first report of the Tuber‐Helvella lineage in a tropical forest. Despite some differences, all age categories of G. dewevrei had overlapping ectomycorrhizal fungal communities, with families belonging to Thelephoraceae, Russulaceae, Sebacinaceae, Boletaceae, and Clavulinaceae. Of the 49 operational taxonomic units shared by the three age categories (65.3% of the ectomycorrhizal fungal community), 19 were the most abundant on root tips of all categories (38.7% of the shared taxa), supporting the likelihood of ectomycorrhizal networks. However, we obtained no evidence for nutrient transfer from trees to seedlings. We discuss the composition of the ectomycorrhizal fungal community among the G. dewevrei age categories and the possible role of common ectomycorrhizal networks in this rain forest.

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Section: Discussionmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Ectomycorrhizal fungi are shared between seedlings and adults in a monodominant Gilbertiodendron dewevrei rain forest in Cameroon

Ebenye

Taudière

Niang³

et al. 2016

Biotropica

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Pyrola japonica, a partially mycoheterotrophic Ericaceae, has mycorrhizal preference for russulacean fungi in central Japan

et al. 2016

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Mycorrhizal symbiosis often displays low specificity, except for mycoheterotrophic plants that obtain carbon from their mycorrhizal fungi and often have higher specificity to certain fungal taxa. Partially mycoheterotrophic (or mixotrophic, MX) plant species tend to have a larger diversity of fungal partners, e.g., in the genus Pyrola (Monotropoideae, Ericaceae). Preliminary evidence however showed that the Japanese Pyrola japonica has preference for russulacean fungi based on direct sequencing of the fungal internal transcribed spacer (ITS) region from a single site. The present study challenges this conclusion using (1) sampling of P. japonica in different Japanese regions and forest types and (2) fungal identification by ITS cloning. Plants were sampled from eight sites in three regions, in one of which the fungal community on tree ectomycorrhizal (ECM) tips surrounding P. japonica was also analyzed. In all, 1512 clone sequences were obtained successfully from 35 P. japonica plants and 137 sequences from ECM communities. These sequences were collectively divided into 74 molecular operational taxonomic units (MOTUs) (51 and 33 MOTUs, respectively). MOTUs from P. japonica involved 36 ECM taxa (96 % of all clones), and 17 of these were Russula spp. (76.2 % of all clones), which colonized 33 of the 35 sampled plants. The MOTU composition significantly differed between P. japonica and ECM tips, although shared species represented 26.3 % of the ECM tips community in abundance. This suggests that P. japonica has a preference for russulacean fungi.

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Transfer to forest nurseries significantly affects mycorrhizal community composition of Asteropeia mcphersonii wildings

Henry

Raivoarisoa²,

Razafimamonjy³

et al. 2016

Mycorrhiza

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Mycorrhizal symbiosis is extremely important for tree growth, survival and resistance after transplantation particularly in Madagascar where deforestation is a major concern. The importance of mycorrhizal symbiosis is further increased when soil conditions at the planting site are limiting. To identify technical itineraries capable of improving ecological restoration in Madagascar, we needed to obtain native ectomycorrhizal (ECM) saplings with a wide diversity of ECM fungi. To this end, we transplanted ECM seedlings from the wild (wildlings) to a nursery. Using molecular characterisation of internal transcribed spacer (ITS) rDNA, we tested the effect of transplanting Asteropeia mcphersonii wildlings on ECM communities after 8 months of growth in the nursery. With or without the addition of soil from the site where the seedlings were sampled to the nursery substrate, we observed a dramatic change in the composition of fungal communities with a decrease in the ECM infection rate, a tremendous increase in the abundance of an operational taxonomic unit (OTU) taxonomically close to the order Trechisporales and the disappearance of all OTUs of Boletales. Transplanting to the nursery and/or to nursery conditions was shown to be incompatible with the survival and even less with the development in the nursery of most ECM fungi naturally associated with A. mcphersonii wildings.

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Asteropeia mcphersonii, a potential mycorrhizal facilitator for ecological restoration in Madagascar wet tropical rainforests

Cited by 14 publications

References 53 publications

Ectomycorrhizal fungi are shared between seedlings and adults in a monodominant Gilbertiodendron dewevrei rain forest in Cameroon

Ectomycorrhizal fungi are shared between seedlings and adults in a monodominant Gilbertiodendron dewevrei rain forest in Cameroon

Pyrola japonica, a partially mycoheterotrophic Ericaceae, has mycorrhizal preference for russulacean fungi in central Japan

Transfer to forest nurseries significantly affects mycorrhizal community composition of Asteropeia mcphersonii wildings

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