Alkaloid Contents in Epichloë Endophyte-Infected Elymus tangutorum Sampled along an Elevation Gradient on the Qinghai-Tibetan Plateau

Shi, Qian; Matthew, C.; Liu, Wenhui; Zhang, Nan

doi:10.3390/agronomy10111812

Cited by 5 publications

(3 citation statements)

References 78 publications

(116 reference statements)

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“…The relationship between endophyte infection rate and host growth environment has not been confirmed as the research has been limited. Some reports have shown that endophyte infection rates of Elymus tangutorum, Lolium rigidum , and F. rubra decreased with increasing elevation (Bazely et al, 2007 ; Kirkby et al, 2011 ; Shi et al, 2020 ). However, other studies on F. ovina, F. eskia, Deschampsia flexuosa , and Poa trivialis did not find a relationship between endophyte infection rate and elevation (Bazely et al, 2007 ; Granath et al, 2007 ; Gonzalo-Turpin et al, 2010 ).…”

Section: Discussionmentioning

confidence: 99%

The microbiota diversity of Festuca sinensis seeds in Qinghai-Tibet Plateau and their relationship with environments

et al. 2022

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A total of 14 Festuca sinensis seed lots were collected from different geographical locations on the Qinghai-Tibet Plateau to study the seed microbiota and determine the abiotic (temperature, precipitation, and elevation) and biotic (Epichloë sinensis infection rate) factors likely to shape the seed microbiome. The 14 seed lots had different bacterial and fungal structures and significantly different diversities (p < 0.05). The α-diversity indices of the bacteria were significantly correlated with precipitation (p < 0.05), whereas those of the fungi were significantly correlated with temperature (p < 0.05). Microbiota analysis showed that Proteobacteria, Cyanobacteria, and Bacteroidetes were the most abundant bacteria at the phylum level in the seeds, and Ascomycota and Basidiomycota were the most abundant fungi. β-diversity analysis suggested large differences in the microbial communities of each sample. Redundancy analysis showed that temperature and precipitation were the main environmental factors that drive variations in the microbial community, at the medium-high elevation (3,000–4,500 m), the impact of temperature and precipitation on microbial community is different, and the other elevations that effect on microbial community were basically identical. Spearman's correlation analysis showed that the relative abundances of the most abundant bacterial phyla were significantly correlated with temperature (p < 0.05), whereas those of the most abundant fungal phyla were significantly correlated with precipitation (p < 0.05). E. sinensis infection rates were significantly correlated with elevation and temperature (p < 0.05). These results suggest that temperature and precipitation are the key factors driving the microbial community, that temperature and elevation also had a great influence on the E. sinensis infection rate, and that environmental factors (temperature and elevation) may further affect the microbial community by regulating the E. sinensis infection rate.

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Section: Discussionmentioning

confidence: 99%

The microbiota diversity of Festuca sinensis seeds in Qinghai-Tibet Plateau and their relationship with environments

et al. 2022

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“…These strains were identified on the basis of morphology and molecular phylogenetic data, and defined as Epichloë bromicola ( Table 3). [46] Phytophthora infestans was provided by Gansu Academy of Agricultural Sciences. The potato (Longshu 3) was purchased by Fan Li from Yuzhong County, Lanzhou city, Gansu province in Aug 15, 2020.…”

Section: Methodsmentioning

confidence: 99%

Crude Extracts and Secondary Metabolites of Epichloë bromicola against Phytophthora infestans

Mei

Ren

et al. 2022

Chemistry & Biodiversity

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Potato late blight caused by Phytophthora infestans is still one of the main factors limiting potato production. Epichloë spp. can provide host plants with various resistances, which makes them show great potential in the biological control of diseases. In this study, we explored the potential biological activity of crude extracts of 20 strains of Epichloë bromicola to control P. infestans. The crude extracts of strains 1 and 8 showed significant antifungal activity with an inhibition rate of 88 % and 81 %, respectively, and showed different effects on the mycelium morphology of P. infestans observed by scanning electron microscopy. Moreover, the two crude extracts demonstrated an interesting therapeutic and protective effect on potato late blight, and none of the extracts had an adverse effect against zebrafish embryos. A total of 13 metabolites were isolated from the crude extract of strain 8, and these tested compounds showed a weak antifungal effect and the inhibition rate was less than 80 %. These findings suggested that strains 1 and 8 have potential for biocontrol of late potato blight.

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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: 96%

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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Alkaloid Contents in Epichloë Endophyte-Infected Elymus tangutorum Sampled along an Elevation Gradient on the Qinghai-Tibetan Plateau

Cited by 5 publications

References 78 publications

The microbiota diversity of Festuca sinensis seeds in Qinghai-Tibet Plateau and their relationship with environments

The microbiota diversity of Festuca sinensis seeds in Qinghai-Tibet Plateau and their relationship with environments

Crude Extracts and Secondary Metabolites of Epichloë bromicola against Phytophthora infestans

Global Change Factors Influence Plant-Epichloë Associations

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