Drought-tolerant and plant growth-promoting endophytic Staphylococcus sp. having synergistic effect with silicate supplementation

Jayakumar, Aswathy; Krishna, Arathy; Nair, Indu C.; Radhakrishnan, E. K.

doi:10.1007/s00203-020-01911-1

Cited by 22 publications

(10 citation statements)

References 42 publications

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“…Their influences on the plant microbiome and therefore on plants can differ from growth promotion to increasing tolerance to biotic and abiotic stresses. As reported by Jayakumar et al [ 38 ], Ceb1 Staphylococcus sp. from the rhizome of Curcuma longa produce IAA and help to tolerate drought stress.…”

Section: Discussionsupporting

confidence: 59%

“…Improvement of the wheat grain micronutrient quality via inoculation of endophytes from different genera appeared recently as one of the approaches for wheat biofortification [ 37 , 53 , 54 , 55 , 56 , 57 , 58 , 60 ]. Endophytic bacteria establish symbiotic, mutualistic, commensalistic, or trophobiotic interactions with various organisms, including plants [ 38 ]. In a field experiment, foliar application of endophytic bacteria increased the wheat height, leaf area, spike length, and plant biomass [ 108 ].…”

Section: Discussionmentioning

confidence: 99%

“…It is well recognized that every plant species possesses its own endo-microbiome that works commensally or beneficially for the host [ 33 , 34 , 35 ]. Endophytic bacteria serve as rich sources of phytohormones and diverse secondary metabolites with a wide spectrum of biological activities [ 24 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ]. An increasing number of scientific reports emphasize the important role of endophytes in priming plant immunity, removing contaminants, solubilizing phosphate, and contributing to nitrogen assimilation, thereby promoting plant growth and yield [ 45 , 46 , 47 ].…”

Section: Introductionmentioning

confidence: 99%

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Bacterial Endophytes of Spring Wheat Grains and the Potential to Acquire Fe, Cu, and Zn under Their Low Soil Bioavailability

Makar

Kuźniar

Patsula

et al. 2021

Biology

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Wheat grains are usually low in essential micronutrients. In resolving the problem of grain micronutritional quality, microbe-based technologies, including bacterial endophytes, seem to be promising. Thus, we aimed to (1) isolate and identify grain endophytic bacteria from selected spring wheat varieties (bread Oksamyt myronivs’kyi, Struna myronivs’ka, Dubravka, and emmer Holikovs’ka), which were all grown in field conditions with low bioavailability of microelements, and (2) evaluate the relationship between endophytes’ abilities to synthesize auxins and the concentration of Fe, Zn, and Cu in grains. The calculated biological accumulation factor (BAF) allowed for comparing the varietal ability to uptake and transport micronutrients to the grains. For the first time, bacterial endophytes were isolated from grains of emmer wheat T. turgidum subsp. dicoccum. Generally, the 12 different isolates identified in the four varieties belonged to the genera Staphylococcus, Pantoea, Sphingobium, Bacillus, Kosakonia, and Micrococcus (NCBI accession numbers: MT302194—MT302204, MT312840). All the studied strains were able to synthesize the indole-related compounds (IRCs; max: 16.57 µg∙mL−1) detected using the Salkowski reagent. The IRCs produced by the bacterial genera Pantoea spp. and Bacillus spp. isolated from high-yielding Oksamyt myronivs’kyi and Holikovs’ka grains may be considered as one of the determinants of the yield of wheat and its nutritional characteristics.

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Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bacterial Endophytes of Spring Wheat Grains and the Potential to Acquire Fe, Cu, and Zn under Their Low Soil Bioavailability

Makar

Kuźniar

Patsula

et al. 2021

Biology

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“…and AMF to improve plant development, biofortification and grain yield (Nanjundappa et al, 2019;Prasanna et al, 2016;Yadav et al, 2020Yadav et al, , 2021Yasmeen et al, 2019). PGPB produce indole acetic acid and siderophore, solubilise phosphate and fix biological nitrogen to improve plant growth and crop productivity (Jayakumar et al, 2020;Kumar et al, 2019;Ramakrishna et al, 2020). Furthermore, PGPB and AMF treatments led to biofortification of zinc (Zn) and iron (Fe) in plants via several mechanisms such as acidification of rhizosphere soil, phenolics secretion, alteration in root architecture and morphology and architecture, decrease in grain phytic acid content and upregulation of Fe carriers (Singh & Prasanna, 2020).…”

Section: Introductionmentioning

confidence: 99%

Bacillus sp. and arbuscular mycorrhizal fungi consortia enhance wheat nutrient and yield in the second-year field trial: Superior performance in comparison with chemical fertilizers

Yadav

Ror

Beniwal

et al. 2022

Journal of Applied Microbiology

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The aim of the study is to analyse the effect of microbial consortia for wheat biofortification, growth, yield and soil fertility as part of a 2-year field study and compare it with the use of chemical fertilizers. Methods and Results:A field trial (second year) was conducted with various combinations of plant growth-promoting bacteria (PGPB) and arbuscular mycorrhizal fungi (AMF) treatments, ranging from a single inoculant to multiple combinations.The microbial consortia used were Bacillus sp. and AMF based on first-year field trial results. The consortia based on native (CP4) and non-native (AHP3) PGPB (Bacillus sp.) and AMF performed better in terms of nutrients content in wheat grain tissue and yield-related traits compared with chemical fertilizer treated and untreated control. Dual treatment of PGPB (CP4+AHP3) combined with AMF resulted in a significant increase in antioxidants. The spatial colonization of AMF in roots indicated that both the isolates CP4 and AHP3 were able to enhance the AMF colonization in root tissue. Furthermore, soil enzymes' activities were higher with the PGPB and AMF combination giving the best results. A positive correlation was recorded between plant growth, grain yield and soil physicochemical parameters. Conclusions:Our findings confirm that the combined treatment of CP4 and AHP3 and AMF functions as an effective microbial consortium with excellent application prospects for wheat biofortification, grain yield and soil fertility compared with chemical fertilizers. Significance and Impact of Study:The extensive application of chemical fertilizers on low-yielding field sites is a severe concern for cereal crops, especially wheat in the Asian continent. This study serves as a primer for implementing site-specific sustainable agricultural-management practices using a green technology leading to significant gains in agriculture.

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“…Overnight grown cultures were transferred to fresh TSB medium with increasing osmotic stress levels 0, –0.25, –0.5, –0.75, –1, –1.25, and –1.5 MPa and incubated at 28°C. Increasing osmotic stress was adjusted with polyethylene glycol 6000 (PEG6000, Serva Electrophoresis GmbH, Heidelberg, Germany) based on decreasing water potential with the formula of Kaufmann and Michel (1973) , according to Kumar et al (2014) and Jayakumar et al (2020) . –1.5 MPa is the water potential plants in regular soil start to wilt irreversibly.…”

Section: Methodsmentioning

confidence: 99%

Genome-Based Characterization of Plant-Associated Rhodococcus qingshengii RL1 Reveals Stress Tolerance and Plant–Microbe Interaction Traits

et al. 2021

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Stress tolerant, plant-associated bacteria can play an important role in maintaining a functional plant microbiome and protecting plants against various (a)biotic stresses. Members of the stress tolerant genus Rhodococcus are frequently found in the plant microbiome. Rhodococcus qingshengii RL1 was isolated from Eruca sativa and the complete genome was sequenced, annotated and analyzed using different bioinformatic tools. A special focus was laid on functional analyses of stress tolerance and interactions with plants. The genome annotation of RL1 indicated that it contains a repertoire of genes which could enable it to survive under different abiotic stress conditions for e.g., elevated mercury concentrations, to interact with plants via root colonization, to produce phytohormones and siderophores, to fix nitrogen and to interact with bacterial signaling via a LuxR-solo and quorum quenching. Based on the identified genes, functional analyses were performed in vitro with RL1 under different growth conditions. The R. qingshengii type strain djl6 and a closely related Rhodococcus erythropolis BG43 were included in the experiments to find common and distinct traits between the strains. Genome based phylogenetic analysis of 15 available and complete R. erythropolis and R. qingshengii genome sequences revealed a separation of the R. erythropolis clade in two subgroups. First one harbors only R. erythropolis strains including the R. erythropolis type strain. The second group consisted of the R. qingshengii type strain and a mix of R. qingshengii and R. erythropolis strains indicating that some strains of the second group should be considered for taxonomic re-assignment. However, BG43 was clearly identified as R. erythropolis and RL1 clearly as R. qingshengii and the strains had most tested traits in common, indicating a close functional overlap of traits between the two species.

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Drought-tolerant and plant growth-promoting endophytic Staphylococcus sp. having synergistic effect with silicate supplementation

Cited by 22 publications

References 42 publications

Bacterial Endophytes of Spring Wheat Grains and the Potential to Acquire Fe, Cu, and Zn under Their Low Soil Bioavailability

Bacterial Endophytes of Spring Wheat Grains and the Potential to Acquire Fe, Cu, and Zn under Their Low Soil Bioavailability

Bacillus sp. and arbuscular mycorrhizal fungi consortia enhance wheat nutrient and yield in the second-year field trial: Superior performance in comparison with chemical fertilizers

Genome-Based Characterization of Plant-Associated Rhodococcus qingshengii RL1 Reveals Stress Tolerance and Plant–Microbe Interaction Traits

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