Effect of Epichloë fungal endophyte symbiosis on tall fescue to cope with flooding-derived oxygen-limited conditions depends on the host genotype

Saedi, T.; Mosaddeghi, Mohammad Reza; Sabzalian, Mohammad R.; Zarebanadkouki, Mohsen

doi:10.1007/s11104-021-05105-6

Cited by 12 publications

(8 citation statements)

References 61 publications

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“…Regarding flooding, endophytes increased the concentration of proline antioxidants in H. brevisubulatum plants, which was linked with low levels of oxidative stress [68]. Similar endophyte-mediated increases in proline levels were reported in certain genotypes of F. arundinacea plants subjected to the same stress [67]. In saline soils, the antioxidant capacity of H. brevisubulatum plants was enhanced by the endophyte presence [72].…”

Section: Endophyte-based Mechanisms Of Plant Protection Against Globa...supporting

confidence: 60%

“…However, more recent investigations have shown that distinct plantendophyte combinations behave differently in the presence of flooding. For instance, the endophyte enhanced the growth and leaf water contents in certain genotypes of F. arundinacea plants that experienced the stress [67]. Furthermore, Hordeum brevisubulatum plants naturally associated with endophytes showed higher foliar biomass than their non-symbiotic counterparts grown in soils with excess water [68].…”

Section: Effects Of Global Change Factors On Plant-epichloë Associationsmentioning

confidence: 99%

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Global Change Factors Influence Plant-Epichloë Associations

Bastías

Ueno

Gundel

2023

JoF

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There is an increasing interest in determining the influence of global change on plant–microorganism interactions. We review the results of experiments that evaluated the effects of the global change factors carbon dioxide, ozone, temperature, drought, flooding, and salinity on plant symbioses with beneficial Epichloë endophytes. The factors affected the performance of both plants and endophytes as well as the frequency of plants symbiotic with the fungus. Elevated carbon dioxide levels and low temperatures differentially influenced the growth of plants and endophytes, which could compromise the symbioses. Furthermore, we summarise the plant stage in which the effects of the factors were quantified (vegetative, reproductive, or progeny). The factors ozone and drought were studied at all plant stages, but flooding and carbon dioxide were studied in just a few of them. While only studied in response to ozone and drought, evidence showed that the effects of these factors on symbiotic plants persisted trans-generationally. We also identified the putative mechanisms that would explain the effects of the factors on plant–endophyte associations. These mechanisms included the increased contents of reactive oxygen species and defence-related phytohormones, reduced photosynthesis, and altered levels of plant primary metabolites. Finally, we describe the counteracting mechanisms by which endophytes would mitigate the detrimental effects of the factors on plants. In presence of the factors, endophytes increased the contents of antioxidants, reduced the levels of defence-related phytohormones, and enhanced the plant uptake of nutrients and photosynthesis levels. Knowledge gaps regarding the effects of global change on plant–endophyte associations were identified and discussed.

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Section: Endophyte-based Mechanisms Of Plant Protection Against Globa...supporting

confidence: 60%

Section: Effects Of Global Change Factors On Plant-epichloë Associationsmentioning

confidence: 99%

Global Change Factors Influence Plant-Epichloë Associations

Bastías

Ueno

Gundel

2023

JoF

View full text Add to dashboard Cite

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“…These results suggest the endophyte aids in osmoregulatory processes and protection from oxidative damage (Table 1) [76]. More recently, Saedi et al [77] tested two strains of Epichloë infected tall fescue in waterlogged, anaerobic conditions. They also found mixed results with one E+ tall fescue type performing well and the other E+ tall fescue type performing poorly.…”

Section: Floodmentioning

confidence: 97%

Interaction between Grasses and Epichloë Endophytes and Its Significance to Biotic and Abiotic Stress Tolerance and the Rhizosphere

et al. 2021

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Cool-season grasses are the most common forage types in livestock operations and amenities. Several of the cool-season grasses establish mutualistic associations with an endophytic fungus of the Epichloë genus. The grasses and endophytic fungi have evolved over a long period of time to form host-fungus specific relationships that confer protection for the grass against various stressors in exchange for housing and nutrients to the fungus. This review provides an overview of the mechanisms by which Epichloë endophytes and grasses interact, including molecular pathways for secondary metabolite production. It also outlines specific mechanisms by which the endophyte helps protect the plant from various abiotic and biotic stressors. Finally, the review provides information on how Epichloë infection of grass and stressors affect the rhizosphere environment of the plant.

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“…In line with this, tall fescue populations have been observed to present high frequencies of endophyte‐infected plants in the Flooding Pampa grassland communities (De Battista, 2005; Graff et al., 2020; Gundel et al., 2009; Petigrosso et al., 2013) While there is abundant information showing how fungal endophytes affect the responses of tall fescue plants to water deficit (Decunta et al., 2021; Malinowski & Belesky, 2000), there is limited information regarding water excess (Bastías et al., 2023). Among the very few studies that have addressed the effect of endophytes on plant tolerance to water excess, the results have been neutral (Arachevaleta et al., 1989) or highly variable among plant genotypes (Saedi et al., 2021). For example, in the latter study, the endophyte increased performance in one plant genotype under water‐induced anaerobic conditions while it had the opposite effect in another (Saedi et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Among the very few studies that have addressed the effect of endophytes on plant tolerance to water excess, the results have been neutral (Arachevaleta et al., 1989) or highly variable among plant genotypes (Saedi et al., 2021). For example, in the latter study, the endophyte increased performance in one plant genotype under water‐induced anaerobic conditions while it had the opposite effect in another (Saedi et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

Response of endophyte‐infected and endophyte‐free tall fescue plants to partial submergence at two developmental stages

Petigrosso,

Vignolio,

Gundel

et al. 2024

Austral Ecology

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Tall fescue (Festuca arundinacea Schreb.) is a perennial C3 grass species usually associated with the endophyte fungus Epichloë coenophiala that enhances tolerance to biotic and abiotic stresses. Given that the proportion of infected tall fescue plants in the grasslands of the Flooding Pampa (Argentina) has been progressively increasing, it is proposed that endophytes confer tolerance to the stresses characteristic of that environment, especially flooding. Plants from a naturalized population and a commercial cultivar were grown, both with and without endophyte (wild type and AR584 respectively). The plants were subjected to two submergence treatments (i.e., control and partial submergence) in two development stages (5‐leaf stage and beginning of the elongation of internodes). Plant performance (aerial and root biomass, root aerenchyma formation, total root length and root diameter, proportion of reproductive tillers, number of panicles and seeds produced) and endophyte transmission to progeny were evaluated. Endophytes did not alter the ecological fitness of plants under partial submergence. Independently of the water condition, the symbiosis was linked to low biomass in plants from the naturalized population, while the opposite occurred in plants from the cultivar. Partial submergence did not affect the germination of the seeds produced, nor the transmission of the endophyte to the seedlings that originated from them. Our work suggests that the invasion ability of tall fescue in the Flooding Pampa grasslands is not related to an endophyte‐mediated improvement of plants to tolerate water excess.

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Effect of Epichloë fungal endophyte symbiosis on tall fescue to cope with flooding-derived oxygen-limited conditions depends on the host genotype

Cited by 12 publications

References 61 publications

Global Change Factors Influence Plant-Epichloë Associations

Global Change Factors Influence Plant-Epichloë Associations

Interaction between Grasses and Epichloë Endophytes and Its Significance to Biotic and Abiotic Stress Tolerance and the Rhizosphere

Response of endophyte‐infected and endophyte‐free tall fescue plants to partial submergence at two developmental stages

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