A toxic grass Achnatherum inebrians serves as a diversity refuge for the soil fungal community in rangelands of northern China

Xiang, Yanqiao; Chen, Zhenjiang; Wei, Xuekai; Chen, Shuihong; White, James F.; Huang, Xi; Li, Chunjie; Zhang, Nan

doi:10.1007/s11104-020-04440-4

Cited by 12 publications

(16 citation statements)

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“…Phylogenetic analysis was conducted on the PhyloSuite v1.2.2 platform [41].The nucleotide sequence of the whole chloroplast genome was aligned in MAFFT based on default parameters [37]. Ambiguously aligned fragments were removed using Gblocks [42], with the following parameter settings: minimum number of sequences for a conserved/flank position (20/20), maximum number of contiguous non-conserved positions (6), minimum length of a block (11), and allowed gap positions (none). ModelFinder [43] was used to select the best-fit model using AIC criterion.…”

Section: 4phylogenetic Analysesmentioning

confidence: 99%

“…)according to the external morphology of the genus Achnatherum in 1990 [4]. This grass is majorly involved in reverse degradation and loss of biodiversity of over-grazed grasslands while serves as a diversityrefuge for the soil fungal community [5][6] symptomless fungal endophyte, Epichloë (E. gansuensis or E. inebrian) [7][8][9]. A. inebrians is commonly referred as drunken horse grass because of the presence of two alkaloids produced in Epichloë endophyte-infected A. inebrians plants, ergonovine and ergine, which cause toxicity or death to horses and other livestock [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…according to the external morphology of the genus Achnatherum in 1990. This grass is majorly involved in reverse degradation and loss of biodiversity of overgrazed grasslands, while it serves as a diversity refuge for the soil fungal community [5,6]. In Northwestern China, almost all the plants of A. inebrians are infected by a symptomless fungal endophyte, Epichloë ( Epichloë gansuensis or Epichloë inebrian ) [7–9].…”

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confidence: 99%

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Complete chloroplast genomes of Achnatherum inebrians and comparative analyses with related species from Poaceae

Wei

Chen

et al. 2021

FEBS Open Bio

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This paper reports the complete chloroplast genome of Achnatherum inebrians, a poisonous herb that is widely distributed in the rangelands of Northern China. The genome is 137,714 bp in total, and consists of a large single-copy (LSC, 81,758 bp) and small single-copy (SSC, 12,682 bp) region separated by a pair of inverted repeats (IRs, 21,637 bp). The genome contains 130 genes, including 84 protein-coding genes, 38 tRNA genes and 8 ribosomal RNA genes, and the GC content is 36.17%. We subsequently performed comparative analysis of complete genomes from A.inebrians and other Poaceae related species from GenBank. Thirty-eight simple sequence repeats (SSRs) were identified, further demonstrating rapid evolution in Poaceae. Finally, the phylogenetic trees of 37 species of Poaceae and two species of Amaranthaceae were constructed by using Maximum likelihood (ML) and Bayesian Inference (BI) methods, based on the genes of the complete chloroplast genome. We identified hotspots which can be used as molecular markers and barcodes for phylogenetic analysis as well as for species identification. Phylogenetic analysis indicated that A. inebrians is a member of the genus Stipa rather than Achnatherum.

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Section: 4phylogenetic Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Complete chloroplast genomes of Achnatherum inebrians and comparative analyses with related species from Poaceae

Wei

Chen

et al. 2021

FEBS Open Bio

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“…Studies have shown that endophytes improve host plant physiology to adapt to stressed environments; endophytes reprogrammed the host response to pathogen invasion and increased toxic chemical production to provide protection against herbivores [ 2 , 3 , 4 ]. In the other side, endophytes live inside plant tissues, which protect them from dehydration, poor nutrition, ultraviolet radiation, and competition [ 5 , 6 ]. The mutual interaction profoundly shaped communities of both plant and microbes and changed the biodiversity, but the related knowledge remains limited.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ionizing Radiation on the Bacterial and Fungal Endophytes of the Halophytic Plant Kalidium schrenkianum

et al. 2021

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Endophytic bacteria and fungi colonize plants that grow in various types of terrestrial and aquatic ecosystems. Our study investigates the communities of endophytic bacteria and fungi of halophyte Kalidium schrenkianum growing in stressed habitats with ionizing radiation. The geochemical factors and radiation (at low, medium, high level and control) both affected the structure of endophytic communities. The bacterial class Actinobacteria and the fungal class Dothideomycetes predominated the endophytic communities of K. schrenkianum. Aerial tissues of K. schrenkianum had higher fungal diversity, while roots had higher bacterial diversity. Radiation had no significant effect on the abundance of bacterial classes. Soil pH, total nitrogen, and organic matter showed significant effects on the diversity of root endophytes. Radiation affected bacterial and fungal community structure in roots but not in aerial tissues, and had a strong effect on fungal co-occurrence networks. Overall, the genetic diversity of both endophytic bacteria and fungi was higher in radioactive environments, however negative correlations were found between endophytic bacteria and fungi in the plant. The genetic diversity of both endophytic bacteria and fungi was higher in radioactive environments. Our findings suggest that radiation affects root endophytes, and that the endophytes associated with aerial tissues and roots of K. schrenkianum follow different mechanisms for community assembly and different paradigms in stress response.

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“…Studies have shown that endophytes improves host plant physiology to adapt to stressed environments; endophytes reprogrammed the host response to pathogen invasion and increased toxic chemical production to provide protection against herbivores (Arnold et al, 2003;Gange, Eschen, Wearn, Thawer, & Sutton, 2012;Rodriguez et al, 2008). In the other side, endophytes live inside plant tissues, which protect them from dehydration, poor nutrition, ultraviolet radiation, and competition (Saikkonen, Faeth, Helander, & Sullivan, 1998;Yao et al, 2020). The mutual interaction profoundly shaped community and changed the biodiversity of plant and microbes, however, the related knowledge remains limited.…”

Section: Introductionmentioning

confidence: 99%

Effect of ionizing radiation on the bacterial and fungal endophytes of the halophytic plant Kalidium schrenkianum

Zhu¹,

Zhang²,

Tang³

et al. 2020

Preprint

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Endophytes are microbes found within tissues of plants in various types of terrestrial and aquatic ecosystems, including those habitats with ionizing radiation. Our study investigates the differences in composition of bacterial and fungal endophytes associated with the halophytic plant Kalidium schrenkianum and the effects of geochemical factors and radiation (at low, medium, high level and control) on the community structure of endophytic bacteria and fungi. The bacterial class Actinobacteria and the fungal class Dothideomycetes predominated the endophytic communities of K. schrenkianum. Aboveground parts had higher fungal diversity while belowground parts had higher bacterial diversity. Soil pH, total nitrogen, and organic matter showed significant effects on the diversity of root endophytes. Radiation had no significant effect on the abundance of different bacterial classes. Sordariomycetes predominated the root fungal microbiota under high radiation intensity. Differences in the endophytic communities between aboveground and belowground parts were more than that between the radiation levels. No significant differences were found in the aboveground bacterial communities among the radiation levels. Radiation showed a significant effect on the fungal co-occurrence networks. Negative correlations were found between endophytic bacteria and fungi in the plant. The genetic diversity of both endophytic bacteria and fungi was higher in radioactive environments. Our findings suggest that the endophytes associated with aboveground and belowground parts of K. schrenkianum follow different mechanisms for community assembly and different paradigms in stress response.

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A toxic grass Achnatherum inebrians serves as a diversity refuge for the soil fungal community in rangelands of northern China

Cited by 12 publications

References 84 publications

Complete chloroplast genomes of Achnatherum inebrians and comparative analyses with related species from Poaceae

Complete chloroplast genomes of Achnatherum inebrians and comparative analyses with related species from Poaceae

Effect of Ionizing Radiation on the Bacterial and Fungal Endophytes of the Halophytic Plant Kalidium schrenkianum

Effect of ionizing radiation on the bacterial and fungal endophytes of the halophytic plant Kalidium schrenkianum

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