Leaf endophytes mediate fertilizer effects on plant yield and traits in northern oat grass (Trisetum spicatum)

Buckley, Heather; Young, Carolyn; Charlton, Nikki D.; Hendricks, Will Q.; Haley, Beth; Nagabhyru, Padmaja; Rudgers, Jennifer A.

doi:10.1007/s11104-018-3848-6

Cited by 13 publications

(9 citation statements)

References 47 publications

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“…In our study, we found that direction and strength of the effects of nutrient supply on fungal endophyte diversity within individual hosts differed strongly among sites. This site dependence may reflect the importance of environmental context in governing host-endophyte interactions, as has been demonstrated in other perennial grass hosts (Ren et al 2011, Busby et al 2016, Whitaker et al 2018, Buckley et al 2019. In contrast to the direct effects of host nutrient content on endophyte diversity, we found that effects apparently mediated by changes in the local plant community were much more consistent.…”

Section: Discussionsupporting

confidence: 53%

“…2018, Buckley et al. ). In contrast to the direct effects of host nutrient content on endophyte diversity, we found that effects apparently mediated by changes in the local plant community were much more consistent.…”

Section: Discussionmentioning

confidence: 99%

“…The composition and diversity of a host's microbiome can alter host physiology, growth, reproduction, and behavior (Rodriguez et al 2009, Round and Mazmanian 2009, Heijtza et al 2011, McFall-Ngai et al 2013, Humphrey et al 2014, Hardoim et al 2015. For example, fungal endophytes can provide a wide array of fitness benefits to their plant hosts, including enhanced stress tolerance, resource-use efficiency, and defense against pathogens and herbivores (Rodriguez et al 2009, Ren et al 2011, Busby et al 2016, Buckley et al 2019. Despite the importance of the microbiome to each host organism, we lack a predictive understanding of the factors that affect microbiome composition and diversity.…”

Section: Introductionmentioning

confidence: 99%

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Effects of nutrient supply, herbivory, and host community on fungal endophyte diversity

Seabloom

Condon

Kinkel

et al. 2019

Ecology

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The microbes contained within free‐living organisms can alter host growth, reproduction, and interactions with the environment. In turn, processes occurring at larger scales determine the local biotic and abiotic environment of each host that may affect the diversity and composition of the microbiome community. Here, we examine variation in the diversity and composition of the foliar fungal microbiome in the grass host, Andropogon gerardii, across four mesic prairies in the central United States. Composition of fungal endophyte communities differed among sites and among individuals within a site, but was not consistently affected by experimental manipulation of nutrient supply to hosts (A. gerardii) or herbivore reduction via fencing. In contrast, mean fungal diversity was similar among sites but was limited by total plant biomass at the plot scale. Our work demonstrates that distributed experiments motivated by ecological theory are a powerful tool to unravel the multiscale processes governing microbial community composition and diversity.

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Section: Discussionsupporting

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of nutrient supply, herbivory, and host community on fungal endophyte diversity

Seabloom

Condon

Kinkel

et al. 2019

Ecology

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“…As such, fungal endophytes increase their host’s fitness and they are likely to follow changes in their host’s morphological and physiological traits that are associated with nutrient acquisition, including a structural modification of plant tissues [ 27 ]. This may thus induce a shift in litter components or root exudates of host plants [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Epichloë Fungal Endophytes Have More Host-Dependent Effects on the Soil Microenvironment than on the Initial Litter Quality

Yang

Xing

et al. 2022

JoF

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Fungal endophytes have been extensively found in most terrestrial plants. This type of plant–microorganism symbiosis generates many benefits for plant growth by promoting nutrient availability, uptake, and resistance to environmental disease or stress. Recent studies have reported that fungal endophytes have a potential impact on plant litter decomposition, but the mechanisms behind its effect are not well understood. We proposed a hypothesis that the impacts of fungal endophytes on litter decomposition are not only due to a shift in the symbiont-induced litter quality but a shift in soil microenvironment. To test this hypothesis, we set-up a field trial by planting three locally dominant grass species (wild barley, drunken horse grass, and perennial ryegrass) with Epichloë endophyte-infected (E+) and -free (E-) status, respectively. The aboveground litter and bulk soil from each plant species were collected. The litter quality and the soil biotic and abiotic parameters were analyzed to identify their changes across E+ and E- status and plant species. While Epichloë endophyte status mainly caused a significant shift in soil microenvironment, plant species had a dominant effect on litter quality. Available nitrogen (N) and phosphorus (P) as well as soil organic carbon and microbial biomass in most soils with planting E+ plants increased by 17.19%, 14.28%, 23.82%, and 11.54%, respectively, in comparison to soils with planting E- plants. Our results confirm that fungal endophytes have more of an influence on the soil microenvironment than the aboveground litter quality, providing a partial explanation of the home-field advantage of litter decomposition.

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“…However, the mechanism of this complex interactive network remains unclear. Moreover, although existing research indicates that FEFs mediate plant N uptake (Buckley et al, 2019 ; Christian et al, 2019 ), how N input affects the community structure of the FEF remains relatively unexplored. FEFs represent a ubiquitous and highly diversified fungal guild (Rodriguez et al, 2009 ) and a substantial and mostly under-explored microbiota critical for ecosystem functioning (Hardoim et al, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Can nitrogen supersede host identity in shaping the community composition of foliar endophytic fungi in an alpine meadow ecosystem?

et al. 2022

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The availability of limiting nutrients plays a crucial role in shaping communities of endophytes. Moreover, whether fungal endophytes are host-specific remains controversial. We hypothesized that in a harsh and nitrogen (N)-deficient area, diversity and community composition of foliar endophytic fungi (FEFs) varied substantially among plots with experimentally elevated levels of macronutrients, and thus, N availability, instead of host species identity, would have a greater influence in structuring fungal communities at different scales. We also expected an important subset of taxa shared among numerous host species and N gradients to form a community-wide core microbiome. We measured the leaf functional traits and community structures of FEFs of three commonly seen species in an alpine meadow nested with a long-term N fertilization experiment. We found that host plant identity was a powerful factor driving the endophytic fungal community in leaves, even in habitats where productivity was strongly limited by nitrogen (p < 0.001). We also found that within the same host, nitrogen was an important driving force for the composition of the endophytic fungi community (p < 0.05). In addition, the leaf carbon content was the most important functional trait that limited the diversity of endophytic fungi (p < 0.001). Finally, we documented a distinct core microbiome shared among our three focal species and N gradients.

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Leaf endophytes mediate fertilizer effects on plant yield and traits in northern oat grass (Trisetum spicatum)

Cited by 13 publications

References 47 publications

Effects of nutrient supply, herbivory, and host community on fungal endophyte diversity

Effects of nutrient supply, herbivory, and host community on fungal endophyte diversity

Epichloë Fungal Endophytes Have More Host-Dependent Effects on the Soil Microenvironment than on the Initial Litter Quality

Can nitrogen supersede host identity in shaping the community composition of foliar endophytic fungi in an alpine meadow ecosystem?

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