Orchidioid fungi of the form-genus Rhizoctonia associated with the roots of Chloraea cuneata Lindl. from Araucanía, Chile

Átala, Cristian; Pereira, Guillermo; Romero, Christian; Muñoz-Tapia, Laureana; Vargas, Reinaldo; Suz, Laura M.

doi:10.4067/s0717-66432015000100017

Cited by 9 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fracchia et al (2014) identified Tulasnella calospora associated with the roots of an Argentinian population of C. lessonii. Similar associations with different Ceratobasidium and Tulasnella taxa had also been reported for other endemic Chilean orchids such as Gavilea araucana (Duran et al 2007), Bipinnula fimbriata (Steinfort et al 2010), Chloraea collicensis and C. gavilu (Pereira et al 2014, Herrera et al 2017, and C. cuneata (Atala et al 2015). Fungi isolated from C. lessonii showed lower growth rates than isolates obtained from roots of other endemic orchids in Chile (Pereira et al 2014, Steinfort et al 2010 and the growth rate differed among populations.…”

Section: Discussionsupporting

confidence: 77%

“…However, the spectrum of fungal partners may change from germination to adult stages of an orchid (Bidartondo & Read 2008). Most of the fungal partners found associated with autotrophic orchids belong to or show Rhizoctonia traits (Atala et al 2015, Otero & Bayman 2009, Mosquera-Espinosa et al 2010, Herrera et al 2017. However, other Basidiomycetes belonging to Russulaceae and Thelephoraceae, and some Ascomycetes like Tuber spp.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mycorrhizal fungi associated with Codonorchis lessonii (Brongn.) Lindl., a terrestrial orchid from Chile

Pereira¹,

Suz

Albornoz³

et al. 2018

Gayana Bot.

Self Cite

View full text Add to dashboard Cite

Almost all orchid species depend on association with fungal partners. These fungal species facilitate orchid seed germination and promote growth and possibly stress tolerance in adult plants, both in the field and laboratory conditions. Codonorchis lessonii is a terrestrial orchid, endemic to southern Chile and Argentina with a currently unknown conservation status. Previous studies have reported Rhizoctonia-like fungi associated with C. lessonii in Argentina, but their fungal partners in Chilean populations are unknown. This study aims to characterize and isolate the mycorrhizal fungi associated with adult individuals of C. lessonii from three different populations in Central-South Chile. Root sections showing pelotons were used for the isolation and identification of the fungal taxa. Radial fungal growth was measured for all mycelial isolates. The presence of binucleate cells placed all isolates within the families Ceratobasidiaceae and Tulasnellaceae and the identification was confirmed by molecular analysis. Fungal isolates belonging to Ceratobasidiaceae grew at a higher rate than those from Tulasnellaceae. Phylogenetic analyses showed that different fungal partners associate with this orchid, suggesting relatively low specificity. The isolation and identification of the fungal partners of C. lessonii could help understand its ecology and contribute in future restoration and propagation initiatives for the species.

show abstract

Section: Discussionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Mycorrhizal fungi associated with Codonorchis lessonii (Brongn.) Lindl., a terrestrial orchid from Chile

Pereira¹,

Suz

Albornoz³

et al. 2018

Gayana Bot.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Research into mycorrhizal fungi associated with Chilean orchids has characterized diverse fungal partners associated with different endemic and native orchids (Table 1). Chilean orchids preferably associate with Tulasnellales; however, other mycorrhizal fungi (Thanatephorus, Ceratobasidium) may also be isolated from Chilean orchids (Steinfort et al 2010;Pereira et al 2014b;Atala et al 2015;Mujica et al 2016;Herrera et al 2017). Table 1 shows a complete analysis and description of the published studies related to symbiotic and asymbiotic strategies applied to the study of ecology and seed reproduction of Chilean orchids.…”

Section: Mycorrhizal Fungi Associated With Chilean Orchidsmentioning

confidence: 99%

Orchid Mycorrhizal Interactions on the Pacific Side of the Andes from Chile. A Review

Herrera

García-Romera

Meneses

et al. 2019

J Soil Sci Plant Nutr

Self Cite

View full text Add to dashboard Cite

In order to confront the constant decline in global biological diversity, amelioration strategies are needed for threatened species to design reintroduction policies, particularly in plants with critical reproduction steps, such as orchids. Orchids are part of a highly diverse plant family, with several species under imminent extinction risk. This is the case of Chilean Orchidaceae, which has shown a constant decay in their populations due to an increase in the alteration processes of their natural distribution habitats. Successful orchid reintroductions require a full understanding of orchid mycorrhizal fungi and their dynamic according to different developmental stages and environmental conditions because orchid seeds need mycorrhizal fungi to obtain nutritional compounds at early developmental stages. This article performed a critical literature review of the ecological studies conducted on Chilean orchids and their relationships with mycorrhizal fungi in order to focus on the best scientific approach to achieve successful restoration programs involving orchid seeds and compatible mycorrhizal fungi.

show abstract

“…Another indirect effect that may have occurred in our study, but not previously expected, may have involved the mycorrhizal benefit due to better soil conditions under the nurse. It is known that orchids have symbiotic associations with mycorrhizal fungi, usually orchidioid, which allow their seeds to germinate since they are mycoheterotrophic at early stages (Smith and Read, 2008), lacking reserves in their very small seeds, being also important in adults (Atala et al, 2015). Besides the biotic interaction with the mycorrhizas, orchid germination is affected by abiotic factors that can affect directly on the orchid seeds/seedlings or indirectly through the availability of fungi and carbon source (Rasmussen et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Top-Down and Bottom-Up Effects Deployed by a Nurse Shrub Allow Facilitating an Endemic Mediterranean Orchid

2019

Self Cite

View full text Add to dashboard Cite

Aims: Facilitation among plant species occurs when the presence of one species, the so-called nurse, alters the environment in a way that enhances the growth, survival or reproduction of a second species. This positive association could be specie-specific and can have direct top-down (canopy) or bottom-up (soil) effects as well as indirect effects like higher tolerance against herbivory. The main objective of our study was to determine the positive interaction between the endemic Chilean orchid Bipinnula fimbriata and the nurse shrub Baccharis macraei in the Mediterranean ecosystem of Chile. Methods: To assess the direct and indirect effects of the nurse, we conducted field and greenhouse experiments, respectively. In the field, we performed manipulative experiments assessing the nurse canopy and soil direct effects on the orchid. We measured microclimatic and edaphic variables within and outside nurses, and assessed survival, growth and photochemical efficiency (Fv/Fm) of the orchids. In the greenhouse, we performed experiments assessing the indirect effect of tolerance to simulated herbivory in orchids under nurse and open spaces conditions. We measured survival, flowering percentage, Fv/Fm, total biomass and jasmonic acid of the orchids. Important Findings: We found more soil moisture and nutrients under the nurses, and higher photosynthetically active radiation, soil and air temperature in open spaces. Survival, growth and Fv/Fm were significantly higher in plants under the nurses, showing the top-down effect more importance than the bottom-up effect. In the greenhouse experiment, we found higher survival, Fv/Fm, flowering and biomass in orchids under the nurse treatment, independently of the imposed herbivory. Jasmonic acid was significantly higher in those individuals with herbivory and open spaces condition. We conclude that B. macraei acts as a nurse improving microclimatic and edaphic conditions that result in an increased survival, growth, physiological status and tolerance against herbivory for B. fimbriata present in the Mediterranean Chilean region.

show abstract

Orchidioid fungi of the form-genus Rhizoctonia associated with the roots of Chloraea cuneata Lindl. from Araucanía, Chile

Cited by 9 publications

References 7 publications

Mycorrhizal fungi associated with Codonorchis lessonii (Brongn.) Lindl., a terrestrial orchid from Chile

Mycorrhizal fungi associated with Codonorchis lessonii (Brongn.) Lindl., a terrestrial orchid from Chile

Orchid Mycorrhizal Interactions on the Pacific Side of the Andes from Chile. A Review

Top-Down and Bottom-Up Effects Deployed by a Nurse Shrub Allow Facilitating an Endemic Mediterranean Orchid

Contact Info

Product

Resources

About