Ericoid mycorrhizal fungi enhance salt tolerance in ericaceous plants

Fadaei, Sepideh; Vaziriyeganeh, Maryamsadat; Young, Michelle; Sherr, Ira; Zwiazek, Janusz J.

doi:10.1007/s00572-020-00958-8

Cited by 18 publications

(8 citation statements)

References 59 publications

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“…As a result, transpiration rates and net photosynthetic rates decreased, and plant growth was suppressed (Vaziriyeganeh et al, 2018). In the report of Fadaei et al (2020), transpiration and net photosynthetic rates of three ericaceous plant species treated with 30 mM NaCl were drastically reduced when grown in a substrate without ErM inoculation, but such detrimental effects were either completely or partially reversed by the inoculation of O. maius and M. variabillis. It was reported that EcM and AM colonization of roots increased the expression level of root aquaporins, resulting in the substantial improvement of root hydraulic conductivity (Xu et al, 2015).…”

Section: Tolerance To Salt and Drought Stressmentioning

confidence: 98%

“…A recent study showed that velvetleaf blueberry (V. myrtilloides), labrador tea (R. groenlandicum), and lingonberry (V. vitisidaea) plants inoculated with M. variabilis had increased dry weights of roots when imposed on NaCl-treatment. Inoculation of O. maius increased root dry weight accumulation in lingonberry plants treated with NaCl at 30 mM (Fadaei et al, 2020). Salt stress generally disrupts plant water relations by adversely affecting water uptake and osmotic balance as well as root hydraulic conductivity in plants (Sutka et al, 2011), which then lead to the decrease in cell turgor and stomatal opening and the inhibition of cell elongation.…”

Section: Tolerance To Salt and Drought Stressmentioning

confidence: 99%

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Ericoid mycorrhizal fungi as biostimulants for improving propagation and production of ericaceous plants

et al. 2022

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The mutualistic relationship between mycorrhizal fungi and plant roots is a widespread terrestrial symbiosis. The symbiosis enables plants to better adapt to adverse soil conditions, enhances plant tolerance to abiotic and biotic stresses, and improves plant establishment and growth. Thus, mycorrhizal fungi are considered biostimulants. Among the four most common types of mycorrhizae, arbuscular mycorrhiza (AM) and ectomycorrhiza (EcM) have been more intensively studied than ericoid mycorrhiza (ErM) and orchidaceous mycorrhiza (OrM). ErM fungi can form symbiotic relationships with plants in the family Ericaceae. Economically important plants in this family include blueberry, bilberry, cranberry, and rhododendron. ErM fungi are versatile as they are both saprotrophic and biotrophic. Increasing reports have shown that they can degrade soil organic matter, resulting in the bioavailability of nutrients for plants and microbes. ErM fungi can synthesize hormones to improve fungal establishment and plant root initiation and growth. ErM colonization enables plants to effective acquisition of mineral nutrients. Colonized plants are able to tolerate different abiotic stresses, including drought, heavy metals, and soil salinity as well as biotic stresses, such as pathogen infections. This article is intended to briefly introduce ErM fungi and document their beneficial effects on ericaceous plants. It is anticipated that the exploration of this special group of fungi will further improve our understanding of their value of symbiosis to ericaceous plants and ultimately result in the application of valuable species or strains for improving the establishment and growth of ericaceous plants.

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Section: Tolerance To Salt and Drought Stressmentioning

confidence: 98%

Section: Tolerance To Salt and Drought Stressmentioning

confidence: 99%

Ericoid mycorrhizal fungi as biostimulants for improving propagation and production of ericaceous plants

et al. 2022

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“…Similarly to N and P, total chlorophyll concentrations in velvetleaf blueberry plants were higher in fresh soil than in the remaining two soil treatments. Improved P and N nutrition, higher leaf chlorophyll concentrations, and increased growth rates are among the most often reported consequences of mycorrhization in plants, including ERM associations (Kosola et al 2007; Shi et al 2016; Fadaei et al 2020). Leaf nitrogen, phosphorus, and chlorophyll concentrations of Labrador tea did not show any significant differences between the three experimental groups, which could be due to variations in the capacity of plant and fungal species to use nutrient sources (Aerts 2002; Sokolovski et al 2002).…”

Section: Discussionmentioning

confidence: 99%

“…The ERM symbiosis allow plants to grow in soils containing toxic amounts of heavy metals (Bradley et al 1982; Sharples et al 2000 a ; Sharples et al 2000 b ) and reduce the accumulation of Al and Mn in plants (Hashem 1995; Yang & Goulart 2000). Inoculation with ERM fungi Oidiodendron maius and Meliniomyces variabilis also improved growth and physiological parameters of velvetleaf blueberry ( Vaccinium myrtilloides ) and Labrador tea ( Rhododendron groenladicum ) exposed to salt stress (Fadaei et al 2020). The present study was designed to investigate the ERM colonization and diversity in the roots of ericaceous plants that were grown from sterilized seeds in fresh soil (upland surface soil) from the boreal forest and in the soil that was obtained from the same forest site and stockpiled for 1 year for oil sands reclamation.…”

Section: Introductionmentioning

confidence: 99%

Impact of soil stockpiling on ericoid mycorrhizal colonization and growth of velvetleaf blueberry (Vaccinium myrtilloides) and Labrador tea (Ledum groenlandicum)

Fadaei

Khan

Young

et al. 2020

Restoration Ecology

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Soil stockpiling is a common practice prior to the reclamation of surface mines. In this study, velvetleaf blueberry and Labrador tea plants were grown from seed in fresh soil, stockpiled soil (1 year), and autoclaved stockpiled soil (1 year) obtained from the Canadian boreal forest. After 7 months of growth, the root colonization intensity with ericoid mycorrhizal (ERM) fungi in both plants growing in stockpiled soil was lower compared to plants growing in the fresh soil. The diversity of ERM fungal species in roots also decreased due to soil stockpiling and Pezoloma ericae was absent from the plants growing in stockpiled soil. Changes in the ERM root colonization in plants growing in stockpiled soil were accompanied by decreases in root and shoot dry weights. Leaf chlorophyll, nitrogen, and phosphorus concentrations of velvetleaf blueberry were higher in fresh soil compared to 1‐year stockpiled soil. Plants grown in the autoclaved stockpiled soil became colonized by the thermotolerant ERM fungus Leohumicola verrucosa and showed higher root and shoot biomass compared to the nonautoclaved stockpiled soil. The results point to the importance of ERM fungi for growth of ericaceous plants, even under favorable environmental conditions and adequate fertilization, and suggest that reduced ERM colonization intensity and ERM fungal diversity in roots likely contributed to the negative effects of soil stockpiling on growth of velvetleaf blueberry and Labrador tea.

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“…There is especially little information concerning the effectiveness of ERM fungi in conferring stress resistance to ericaceous plants [4]. A recent study reported that Oidiodendron maius and Meliniomyces variabilis improved salt tolerance of the three examined ericaceous species of plants and their effects on the different growth, and physiological parameters varied depending on the fungal and plant species [7]. However, little is known about the effectiveness of ERM associations on the responses of ericaceous plants to soil moisture conditions.…”

Section: Introductionmentioning

confidence: 99%

Inoculation with Ericoid Mycorrhizal Associations Alleviates Drought Stress in Lowland and Upland Velvetleaf Blueberry (Vaccinium myrtilloides) Seedlings

Zwiazek

2021

Plants

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Although velvetleaf blueberry (Vaccinium myrtilloides) is usually associated with sandy (upland) areas of the North American boreal forest, lowland populations can be also found in bogs, suggesting possible adaptations to different site conditions. In this study, we examined the role of ericoid mycorrhizal (ERM) fungi in conferring drought resistance to the upland and lowland velvetleaf blueberry seedlings. The seedlings were inoculated with four ERM fungi (Pezicula ericae, Pezoloma ericae, Meliniomyces variabilis, and Oidiodendron maius) isolated from the roots of ericaceous plants and grown under controlled environmental conditions in sterilized soil. The inoculated and non-inoculated (inoculation control) plants were subsequently subjected to three cycles of drought stress by withdrawing watering. Lowland plants appeared to benefit relatively more from mycorrhizal colonization, compared with the upland plants, in terms of plant growth and drought survival. After three weeks of treatments, the dry weights of non-inoculated well-watered upland plants were higher compared to the non-inoculated lowland plants. However, these differences were offset by the inoculation of plants with ERM fungi, some of which also significantly improved drought resistance characteristics of the upland and lowland plants. There were no major differences in the effects of different ERM fungal species on drought responses of upland and lowland plants. Of the examined ericoid mycorrhizal fungi, inoculation with Pezicula ericae was the most effective in conferring drought resistance characteristics to both upland and lowland seedlings and helped maintain higher shoot water potentials, net photosynthetic, and transpiration rates in plants subjected to drought stress.

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Ericoid mycorrhizal fungi enhance salt tolerance in ericaceous plants

Cited by 18 publications

References 59 publications

Ericoid mycorrhizal fungi as biostimulants for improving propagation and production of ericaceous plants

Ericoid mycorrhizal fungi as biostimulants for improving propagation and production of ericaceous plants

Impact of soil stockpiling on ericoid mycorrhizal colonization and growth of velvetleaf blueberry (Vaccinium myrtilloides) and Labrador tea (Ledum groenlandicum)

Inoculation with Ericoid Mycorrhizal Associations Alleviates Drought Stress in Lowland and Upland Velvetleaf Blueberry (Vaccinium myrtilloides) Seedlings

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