Ergot Alkaloid and Endogenous Hormones Quantities and Relationship in Epichloë Endophyte: Drunken Horse Grass are Affected by Altitude

Liu, Jing; Chen, Zhenjiang; White, James F.; Chen, Taixiang; Shi, Qian; Jin, Yuanyuan; Li, Chunjie

doi:10.1007/s00344-022-10675-5

Cited by 3 publications

(2 citation statements)

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“…Moreover, enhanced concentrations of certain endophytederived alkaloids were documented in F. arundinacea and L. perenne plants grown in warm temperatures [45][46][47][48], but see [40]. In field experiments, concentrations of endophytederived alkaloids were positively correlated with the environmental temperature experienced by plants [49,50]. Furthermore, the endophyte-mediated promotion in the number of plant flowerheads was apparently influenced by the variation in the temperature in conjunction with other environmental variables in the field (e.g., soil nutrient contents, water availability) [51].…”

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

confidence: 97%

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: Effects Of Global Change Factors On Plant-epichloë Associationsmentioning

confidence: 97%

Global Change Factors Influence Plant-Epichloë Associations

Bastías

Ueno

Gundel

2023

JoF

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“…Current research on A. inebrians mainly focuses on control (Jin et al, 2017), characteristics (Li, 2005), seed germination (Chen et al, 2021), toxic ingredients (Liu et al, 2022) and Epichloë endophyte resistance (Zhang et al, 2012) in the A. inebrians population. Research on prevention and restoration of A. inebrians-type degraded grassland focuses on responses of A. inebrians population traits, edible forage yield and grassland community diversity to fencing, mowing, manual digging and sowing excellent forage (Li et al, 1996;Mcdaniel and Sterling, 2007;Jing et al, 2014;Yang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Responses of community traits and soil characteristics of Achnatherum inebrians-type degraded grassland to grazing systems in alpine meadows on the Qinghai-Tibet Plateau

Chen,

Xu,

et al. 2023

Front. Plant Sci.

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IntroductionScientific grazing management is of great significance for the ecological health and sustainable use of alpine meadows.MethodsTo explore appropriate management methods of alpine grasslands of the Qinghai-Tibet Plateau degraded by Achnatherum inebrians (Hance) Keng ex Tzvele presence, we studied the effects of different grazing systems on the A. inebrians population, grassland vegetation community traits, soil characteristics and soil microbial community structure for cold- season grazing plus supplementary feeding pasture (CSF) and four-season open public pasture (FOP) in Tianzhu County, Gansu Province.ResultsCompared with FOP, the CSF site showed significantly inhibited reproduction of A. inebrians, especially the crown width, seed yield and number of reproductive branches per plant were as high as 50%, significantly increased the aboveground biomass of edible forage and soil water content by 57% and 43–55%, better soil nutrients, and significantly reduced soil bulk density by 10– 29%. Different grazing systems affected the composition and diversity of soil microbial communities, with a greater effect on fungi than on bacterial flora. The most abundant phyla of bacteria and fungi were Proteobacteria and Ascomycota for CSF (by 30–38% and 24–28%) and for FOP (by 67–70% and 68–73%), and the relative abundance and species of bacterial and fungal genera were greater for CSF than FOP. The α-diversity indexes of fungi were improved, and the β-diversity of fungi was significant difference between CSF and FOP. However, the grazing utilization time was prolonged in FOP, which reduced the diversity and abundance of soil bacteria and increased soil spatial heterogeneity. The use of A. inebrians-type degraded grassland in the cold season, and as a winter supplementary feeding and resting ground, could effectively inhibit expansion of A. inebrians, promote edible forage growth, enhance grassland productivity and community stability, and improve soil structure. DiscussionThe results guide healthy and sustainable utilization of A. inebrians-type degraded grassland in the Qinghai-Tibet Plateau.

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