<i>Preussia</i> sp. BSL-10 producing nitric oxide, gibberellins, and indole acetic acid and improving rice plant growth

Al-Hosni, Khdija; Shahzad, Raheem; Khan, Abdul Latif; Imran, Qari Muhammad; Al‐Harrasi, Ahmed; Rawahi, Ahmed Al; Asaf, Sajjad; Kang, ⋅Sang-Mo; Yun, Byung‐Wook; Lee, In‐Jung

doi:10.1080/17429145.2018.1432773

Cited by 30 publications

(16 citation statements)

References 36 publications

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“…S7b ). In the RT network, the key connectors were the Firmicutes (including the well-known plant-associated Bacillus and Paenibacillus genera [ 72 ]), Actinobacteria ( Nocardioides , Isoptericola and Streptomyces ), and Gammaproteobacteria ( Acinetobacter , Ramlibacter and Pseudoxanthomonas ), as well as fungal PGP taxa such as Preussia ( Ascomycota [ 73 ]), Rhodotorula ( Basidiomycota [ 74 ]) and Mortierella ( Zigomycota [ 75 ]; (Fig. 4e ; Supplementary Data S2 and Supplementary Result S2 ).…”

Section: Resultsmentioning

confidence: 99%

The plant rhizosheath–root niche is an edaphic “mini-oasis” in hyperarid deserts with enhanced microbial competition

Marasco

Fusi

Ramond

et al. 2022

ISME Communications

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Plants have evolved unique morphological and developmental adaptations to cope with the abiotic stresses imposed by (hyper)arid environments. Such adaptations include the formation of rhizosheath–root system in which mutualistic plant–soil microbiome associations are established: the plant provides a nutrient-rich and shielded environment to microorganisms, which in return improve plant-fitness through plant growth promoting services. We hypothesized that the rhizosheath–root systems represent refuge niches and resource islands for the desert edaphic microbial communities. As a corollary, we posited that microorganisms compete intensively to colonize such “oasis” and only those beneficial microorganisms improving host fitness are preferentially selected by plant. Our results show that the belowground rhizosheath–root micro-environment is largely more hospitable than the surrounding gravel plain soil with higher nutrient and humidity contents, and cooler temperatures. By combining metabarcoding and shotgun metagenomics, we demonstrated that edaphic microbial biomass and community stability increased from the non-vegetated soils to the rhizosheath–root system. Concomitantly, non-vegetated soil communities favored autotrophy lifestyle while those associated with the plant niches were mainly heterotrophs and enriched in microbial plant growth promoting capacities. An intense inter-taxon microbial competition is involved in the colonization and homeostasis of the rhizosheath zone, as documented by significant enrichment of antibiotic resistance genes and CRISPR-Cas motifs. Altogether, our results demonstrate that rhizosheath–root systems are “edaphic mini-oases” and microbial diversity hotspots in hyperarid deserts. However, to colonize such refuge niches, the desert soil microorganisms compete intensively and are therefore prepared to outcompete potential rivals.

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Section: Resultsmentioning

confidence: 99%

The plant rhizosheath–root niche is an edaphic “mini-oasis” in hyperarid deserts with enhanced microbial competition

Marasco

Fusi

Ramond

et al. 2022

ISME Communications

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“…Preussia spp. such as P. terricola have been reported to improve plant growth and produce phytohormones ( Al-Hosni et al, 2018 ). A. nepalense , a manganese oxide-depositing fungus, can convert soluble Mn (II) into insoluble Mn (III, IV) oxides ( Saiz-Jimenez et al, 2012 ).…”

Section: Discussionmentioning

confidence: 99%

Dark Septate Endophytes Isolated From Wild Licorice Roots Grown in the Desert Regions of Northwest China Enhance the Growth of Host Plants Under Water Deficit Stress

Wang

Hou

et al. 2021

Front. Microbiol.

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This study aimed to explore dark septate endophytes (DSE) that may improve the cultivation of medicinal plants in arid ecosystems. We isolated and identified eight DSE species (Acremonium nepalense, Acrocalymma vagum, Alternaria chartarum, Alternaria chlamydospora, Alternaria longissima, Darksidea alpha, Paraphoma chrysanthemicola, and Preussia terricola) colonizing the roots of wild licorice (Glycyrrhiza uralensis) in the desert areas of northwest China. Moreover, we investigated the osmotic stress tolerance of the DSE using pure culture, along with the performance of licorice plants inoculated with the DSE under drought stress in a growth chamber, respectively. Here, five species were first reported in desert habitats. The osmotic-stress tolerance of DSE species was highly variable, A. chlamydospora and P. terricola increased the total biomass and root biomass of the host plant. All DSE except A. vagum and P. chrysanthemicola increased the glycyrrhizic acid content; all DSE except A. chartarum increased the glycyrrhizin content under drought stress. DSE × watering regimen improved the glycyrrhizic acid content, soil organic matter, and available nitrogen. Structural equation model analysis showed that DSE × watering regimen positively affected soil organic matter, and total biomass, root length, glycyrrhizic acid, and glycyrrhizin (Shapotou site); and positively affected soil organic matter, available phosphorus, and glycyrrhizin (Minqin site); and positively affected the root length (Anxi site). DSE from the Shapotou site accounted for 8.0, 13.0, and 11.3% of the variations in total biomass, root biomass, and active ingredient content; DSE from the Minqin site accounted for 6.6 and 8.3% of the variations in total biomass and root biomass; DSE from the Anxi site accounted for 4.2 and 10.7% of the variations in total biomass and root biomass. DSE × watering regimen displayed a general synergistic effect on plant growth and active ingredient contents. These findings suggested that the DSE–plant interactions were affected by both DSE species and DSE originating habitats. As A. chlamydospora and P. terricola positively affected the total biomass, root biomass, and active ingredient content of host plants under drought stress, they may have important uses as promoters for the cultivation of licorice in dryland agriculture.

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“…In our work, the crude fungal IAA of the isolated endophytes at concentrations of 0.1 and 1 µg/mL promoted the elongation of the lengths of all Arabidopsis roots significantly, but these effects were not unequivocal at the higher IAA concentrations. Similarly, IAA production by endophytic fungi including Preussia sp., Aspergillus japonicus and F. oxysporum stimulated rice and corn root growth [44,46,48]. Interestingly, the biomasses of Arabidopsis plants were reduced due to the treatment of the fungal extracts, while the accumulation of photosynthetic pigments were increased only in certain cases.…”

Section: Discussionmentioning

confidence: 99%

“…Later, the IAA production of a Preussia sp. isolated in that study was also determined, where the production was 1.64 μg/mL based on GC MS/SIM analysis [ 44 ]. Khan et al also published the IAA production of a Paecilomyces formosus endophyte isolated from the roots of cucumber plant, where the quantity of IAA was 10.2 μg/mL [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

Characterization of the Plant Growth-Promoting Activities of Endophytic Fungi Isolated from Sophora flavescens

et al. 2020

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Endophytic fungi in symbiotic association with their host plant are well known to improve plant growth and reduce the adverse effects of both biotic and abiotic stresses. Therefore, fungal endophytes are beginning to receive increased attention in an effort to find growth-promoting strains that could be applied to enhance crop yield and quality. In our study, the plant growth-promoting activities of endophytic fungi isolated from various parts of Sophora flavescens (a medicinally important plant in Mongolia and China) have been revealed and investigated. Fungal isolates were identified using molecular taxonomical methods, while their plant growth-promoting abilities were evaluated in plate assays. Altogether, 15 strains were isolated, representing the genera Alternaria, Didymella, Fusarium and Xylogone. Five of the isolates possessed phosphate solubilization activities and twelve secreted siderophores, while all of them were able to produce indoleacetic acid (IAA) in the presence or absence of tryptophan. The endogenous and exogenous accumulation of IAA were also monitored in liquid cultures using the HPLC-MS/MS technique to refine the plate assay results. Furthermore, for the highest IAA producer fungi, the effects of their extracts were also examined in plant bioassays. In these tests, the primary root lengths of the model Arabidopsis thaliana were increased in several cases, while the biomasses were significantly lower than the control IAA treatment. Significant alterations have also been detected in the photosynthetic pigment (chlorophyll-a, -b and carotenoids) content due to the fungal extract treatments, but these changes did not show any specific trends.

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Preussia sp. BSL-10 producing nitric oxide, gibberellins, and indole acetic acid and improving rice plant growth

Cited by 30 publications

References 36 publications

The plant rhizosheath–root niche is an edaphic “mini-oasis” in hyperarid deserts with enhanced microbial competition

The plant rhizosheath–root niche is an edaphic “mini-oasis” in hyperarid deserts with enhanced microbial competition

Dark Septate Endophytes Isolated From Wild Licorice Roots Grown in the Desert Regions of Northwest China Enhance the Growth of Host Plants Under Water Deficit Stress

Characterization of the Plant Growth-Promoting Activities of Endophytic Fungi Isolated from Sophora flavescens

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