Interaction between plant genotype and the symbiosis with Epichloë fungal endophytes in seeds of red fescue (Festuca rubra)

Gundel, Pedro E.; Zabalgogeazcoa, Íñigo; Aldana, Beatriz R. Vázquez de

doi:10.1071/cp11300

Cited by 15 publications

(10 citation statements)

References 36 publications

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“…Epichloë fungal endophytes have shown to affect different growth attributes and biochemical variables of those maternal lines (Zabalgogeazcoa et al, 2006;Vázquez-de-Aldana et al, 2013). Each plant was split into three ramets, randomly transplanted in a field plot on a research farm (IRNASA-CSIC, Salamanca, Spain; Gundel et al, 2011b). The seeds were produced in 3 years: 2009, 2010, and 2011, and stored for 24, 12, and 1 month, respectively, under dry and cold (10 • C) conditions.…”

Section: Festuca Rubramentioning

confidence: 99%

“…However, the presence of an endophyte does not always contribute toward viability. Whereas endophytes enhance the survival of germinating seeds in L. multiflorum and F. rubra (Gundel et al, 2006(Gundel et al, , 2011b, they had a negative effect on seed viability under both cool-dry and wet-warm storage conditions (Gundel et al, 2012(Gundel et al, , 2015. Therefore, endophyte effects on seeds may differ depending on the plant species, seed quality, seed storage conditions and antioxidant.…”

Section: Introductionmentioning

confidence: 99%

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Occurrence of Alkaloids in Grass Seeds Symbiotic With Vertically-Transmitted Epichloë Fungal Endophytes and Its Relationship With Antioxidants

et al. 2018

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Host organisms can acquire new functional traits through symbiosis. Seed-transmitted Epichloë fungal endophytes are known to protect host plants against herbivores and increase tolerance to abiotic stresses by alkaloids and antioxidants, respectively (currencies of mutualism). Whereas, alkaloids are fungal products with demonstrated effects at plant vegetative stage, few studies have focused on alkaloids in seeds. We assessed the occurrence of fungal alkaloids and determined their concentrations in seeds of two host grasses, Festuca rubra and Lolium multiflorum. Then, we sought for a relationship with the antioxidants tocochromanols and glutathione, which are involved in the control of oxidative stress. Different alkaloids were detected depending on the species and plant genotype. Most notably, loline alkaloids were not detected in F. rubra seeds, whereas ergovaline and peramine were absent in L. multiflorum. In F. rubra, ergovaline concentration was dependent on the maternal line in interaction with the production year, diminishing in seeds after 1 year of storage. The exposure of L. multiflorum plants to ozone had no effect on the seed concentration of lolines. There was a significant positive relationship between the concentrations of ergovaline and tocochromanols in both species, and between ergovaline concentration and E GSSG/2GSH (glutathione halfcell reduction potential) in RAB maternal line of F. rubra. These results suggest that alkaloid and antioxidants have a close association in seeds of host grasses, and that the alkaloid bioactivity could be related with the antioxidant capacity to control stress. This has important implications for the ecology of partner species, thus supporting its consideration for further research.

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Section: Festuca Rubramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Occurrence of Alkaloids in Grass Seeds Symbiotic With Vertically-Transmitted Epichloë Fungal Endophytes and Its Relationship With Antioxidants

et al. 2018

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“…Several studies have reported that the degree of mutual benefit is conditional on environmental factors such as nutrient and substrate availability (Saikkonen et al 2006). Gundel, Zabalgogeazcoa, and Vázquez De Aldana (2011) conducted an experiment to study the differences in seed germination and mortality between infected and endophyte-free plants at different temperatures of 12 and 25 • C and water potentials of 0 and −0.5 MPa. The results indicated that the mortality was highly dependent on the interactions between plant genotype and endophyte and between temperature and water condition.…”

Section: Introductionmentioning

confidence: 99%

Response of Diploid Perennial Ryegrass to Fungal Endophyte AR29 Infections under Water Stress

Rahman¹,

Simpson²,

Matthew³

et al. 2015

Communications in Soil Science and Plant Analysis

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Asexual fungus Neotyphodium spp. are often associated with aboveground parts of different grasses. Perennial ryegrass (Lolium perenne L.), dominant cool-season grass species in New Zealand, is frequently infected by endophytic fungus (Neotyphodium lolli). To evaluate the growth, nutrient status, and avoidance to dehydration stress, clones of diploid perennial ryegrass either infected with Neotyphodium lolii AR29 endophyte (E+) or not infected (E−) were grown in a potted Andisol with intermittent wetting-drying cycles in a controlled growth chamber. Results showed that endophyte infection (E+) significantly reduced plant height, tiller number, shoot and root dry weights, and root volume with an associated increase in root/shoot ratios of ryegrass. The E+ plants showed a greater shoot and lower root avoidance to dehydration stress than the E− plants. The negative values of relative interaction intensity index between the diploid ryegrass and AR29 endophyte association suggested that these host-endophyte associations were parasitic under intermittent soil wetting-drying cycles. While the nitrogen (N) and phosphorus (P) concentration, plant production index, and water-use efficiency were significantly greater in E+ plant than in E− plants, the N and P efficiency ratios were greater in E− plants than in E+ plants. Results suggested that the endophyte mediation may have synergistic or antagonistic effects which depend on particular host genotype-endophyte combinations and environmental conditions to promote drought tolerance in grasses for degraded land restoration or forage production.

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“…For instance, the epichloid endophyte Neotyphodium occultans was found responsible for changes in seed water dynamics in Lolium multiflorum Lam., affecting germination under different water availabilities and seed longevity under storage and field conditions (Gundel et al ., , ). The endophyte E. festucae affected seed germination in F. rubra , depending on the plant genotype and environmental condition, and it was also associated with higher seed and seedling survival (Wäli et al ., ; Gundel et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Germination response of endophytic Festuca rubra seeds in the presence of arsenic

Aldana

Gundel

Criado

et al. 2013

Grass and Forage Science

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Epichloë fungal endophytes colonize the intercellular space of aerial organs of their plant hosts without causing symptoms. These symbionts are known to improve the performance of their host grasses in some situations of biotic and abiotic stress, leading to the suggestion that they can be used to improve grass tolerance to contaminants. The grass Festuca rubra is a host of the endophyte Epichloë festucae. We used two half‐sib lines of F. rubra, each line composed of infected (E+) or endophyte‐free (E−) seeds, to study the effect of varying levels of arsenic (6, 12, 25, and 50 mg L−1), and of the endophyte in seed germination and radicle growth. The results showed that seed germination was not significantly affected by arsenic (As) levels lower than 25 mg L−1, indicating that this grass has a relatively high tolerance of As at the germination stage. The decrease in germination observed at 25 and 50 mg L−1 was due to increased seed mortality and to the reversible inhibition of the germination of viable seeds caused by As. The presence of the endophyte did not change the germination response to arsenic of one line, but affected negatively the germination of the other line. In contrast to the process of germination, radicles of E+ seeds of both lines were longer than those of endophyte‐free seeds. The results of this work indicate that Epichloë endophytes can affect the performance of some F. rubra genotypes when As is present in the soil.

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Interaction between plant genotype and the symbiosis with Epichloë fungal endophytes in seeds of red fescue (Festuca rubra)

Cited by 15 publications

References 36 publications

Occurrence of Alkaloids in Grass Seeds Symbiotic With Vertically-Transmitted Epichloë Fungal Endophytes and Its Relationship With Antioxidants

Occurrence of Alkaloids in Grass Seeds Symbiotic With Vertically-Transmitted Epichloë Fungal Endophytes and Its Relationship With Antioxidants

Response of Diploid Perennial Ryegrass to Fungal Endophyte AR29 Infections under Water Stress

Germination response of endophytic Festuca rubra seeds in the presence of arsenic

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