Mycorrhizal fungi isolated from native terrestrial orchids of pristine regions in Córdoba (Argentina)

Pardo, Agustina Fernández Di; Chiocchio, Viviana M.; Barrera, Viviana; Colombo, Roxana; Gasoni, L.; Mártínez, A E

doi:10.15517/rbt.v63i1.14226

Cited by 9 publications

(2 citation statements)

References 22 publications

(24 reference statements)

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“…So far little is known on the impact of global warming on plant endophytes, primarily because most symbionts remain unidentified 73 . While molecular studies allowed to isolate and genetically characterize fungi from orchid roots, leaves and stems 74 – 77 , the actual composition of orchid fungal symbionts is still poorly explored and most of taxa found in plant tissues have been assigned only to family or genus rank 78 – 81 . The lack of species-level identification of orchid symbionts excludes possibility of any reliable broad-scale analyses of the importance of fungi on the Orchidaceae distribution.…”

Section: Discussionmentioning

confidence: 99%

Loss of fungal symbionts and changes in pollinator availability caused by climate change will affect the distribution and survival chances of myco-heterotrophic orchid species

Kolanowska

2023

Sci Rep

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The first comprehensive species distribution models for orchid, its fungal symbionts and pollinator are presented. To evaluate impact of global warming on these organisms three different projections and four various climate change scenarios were analysed. The niche modelling was based on presence-only records of Limodorum abortivum, two species of Russula and three insects pollinating orchid (Anthophora affinis, Bombus terrestris, Rhodanthidium septemdentatum). Two sets of orchid predictions were examined—the first one included only climatic data and the second one was based on climate data and data on future distribution of orchid fungal symbionts. Overall, a poleward range shift is predicted to occur as a result of climate change and apparently global warming will be favorable for L. abortivum and its potential geographical range will expand. However, due to the negative effect of global warming on fungal symbionts of L. abortivum, the actual extension of the suitable niches of the orchid will be much limited. Considering future possibility of cross-pollination, the availability of A. affinis for L. abortivum will decrease and this bee will be available in the worst case scenarios only for 21% of orchid populations. On the other hand, the overlap of orchid and the buff-tailed bumblebee will increase and as much as 86.5% of plant populations will be located within B. terrestris potential range. Also the availability of R. septemdentatum will be higher than currently observed in almost all analysed climate change projections. This study showed the importance of inclusion of ecological factors in species distribution models as the climate data itself are not enough to estimate the future distribution of plant species. Moreover, the availability of pollen vectors which is crucial for long-term survival of orchid populations should be analysed in context of climate changes.

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Section: Discussionmentioning

confidence: 99%

Loss of fungal symbionts and changes in pollinator availability caused by climate change will affect the distribution and survival chances of myco-heterotrophic orchid species

Kolanowska

2023

Sci Rep

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“…While studies on orchid mycorrhizae have been conducted for decades (Dorr & Kollmann, 1969;Narayanaswami, 1950;Rasmussen, 2002;Taylor & Bruns, 1997), many fungal species isolated from roots of various species remain poorly recognized (Bayman et al, 1997;Chen et al, 2011;Favre-Godal et al, 2020). Unfortunately, fungi isolated from orchid tissues are oen not identified at the species level, and only the ITS-DNA-based operational taxonomic units (OTUs) are used in many analyses of orchid-fungus symbioses (Fernández Di Pardo et al, 2015). In the case of fungi, the main limitation and challenge to constructing a species distribution model is the uncertainty over identification and taxonomy that can mask actual occurrences and result in incorrect predictions (Fernández-López et al, 2021;Hao et al, 2020).…”

Section: Importance Of Identification Distributional Data and Taxonom...mentioning

confidence: 99%

The long-term survival and climatic distribution of mixotrophic and mycoheterotrophic orchids

Kolanowska,

Ruszkiewicz-Michalska

2023

Acta Soc Bot Pol

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Orchid germination depends on their fungal partner; however, there are no broadscale analyses evaluating the actual overlap between orchids and their mycorrhizal symbionts. The aim of this research was to evaluate the importance of mycorrhizal fungi for the occurrence of two species of orchids using ecological niche modeling (ENM). Two sets of future orchid distribution models were created – the first one was based on bioclimatic data only, and the second one included information about the distribution of fungal symbionts. The jackknife test indicated that for both mixotrophic and mycoheterotrophic orchids, the presence of symbiotic fungi is crucial for their occurrence, and ENM analyses revealed that both orchids face habitat loss as a result of predicted changes in climate. In the case of the mixotrophic orchid, the presence of symbiotic fungi can compensate for unfavorable climatic conditions. Problems and limitations in modeling the distributions of species are discussed in terms of the symbiotic relationship.

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Biogeography and Ecology of Tulasnellaceae

Oberwinkler

Cruz

Suárez

2017

Biogeography of Mycorrhizal Symbiosis

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Mycorrhizal fungi isolated from native terrestrial orchids of pristine regions in Córdoba (Argentina)

Cited by 9 publications

References 22 publications

Loss of fungal symbionts and changes in pollinator availability caused by climate change will affect the distribution and survival chances of myco-heterotrophic orchid species

Loss of fungal symbionts and changes in pollinator availability caused by climate change will affect the distribution and survival chances of myco-heterotrophic orchid species

The long-term survival and climatic distribution of mixotrophic and mycoheterotrophic orchids

Biogeography and Ecology of Tulasnellaceae

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