Plant Abiotic and Biotic Stress Alleviation: From an Endophytic Microbial Perspective

Kumar, Vivek; Nautiyal, Chandra Shekhar

doi:10.1007/s00284-022-03012-2

Cited by 17 publications

(5 citation statements)

References 94 publications

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“…The selected zinc-dissolving endophytes also produced indole acetic acid phytohormones in amounts ranging from 35.4 µg/mL to 117.2 µg/mL. There are reports that propose that phytohormone-producing endophytes play a significant role in plant growth enhancement [68,69] and stress management [70,71].…”

Section: Discussionmentioning

confidence: 99%

Finger Millet (Eleusine coracana) Plant–Endophyte Dynamics: Plant Growth, Nutrient Uptake, and Zinc Biofortification

et al. 2023

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Endophytic fungi and bacteria were isolated from finger millet and their effects on finger millet growth parameters and zinc and NPK contents in grains were studied. Out of 70 fungal and 112 bacterial endophytes, the two best fungal and bacterial isolates were selected on the basis of zinc solubilization and plant-growth-promoting attributes. The fungal isolates identified were Aspergillus terreus and Lecanicillium sp., and the bacterial isolates were Pseudomonas bijieensis and Priestia megaterium. The endophytic zinc, NPK mobilization, and plant-growth-promoting efficacy were determined in a pot experiment with zinc carbonate as the zinc source. Endophytic-primed plants showed enhanced shoot and root lengths compared to the unprimed control. Endophytes increased the zinc content in grains by between 12.12% and 18.80% compared to control plants. Endophytes also augmented the NPK concentrations in seeds compared to control plants and exhibited stability in a diverse range of pHs, temperatures, and NaCl concentrations, and exhibited growth on various carbohydrate and nitrogen sources. This is the first study reporting the interaction of Aspergillus terreus, Lecanicillium sp., Pseudomonas bijieensis, and Priestia megaterium with finger millet for grain Zn biofortification and NPK concentration enhancement. This study indicated that zinc-dissolving endophytes possess the potential for enhancing the zinc and NPK content in grains in addition to the plant-growth-promoting attributes.

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Section: Discussionmentioning

confidence: 99%

Finger Millet (Eleusine coracana) Plant–Endophyte Dynamics: Plant Growth, Nutrient Uptake, and Zinc Biofortification

et al. 2023

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“…Aspergillus nidulans are endophytes, which reveal the potential of the CoO-tolerant produced spherical CoONPs with a diameter of 20 nm through an Frontiers in Environmental Science frontiersin.org extracellular tract (Fadiji et al, 2022a). Endophytic microorganisms can produce some biological active materials with a broad gap of structural and biological potential, which can be employed to examine the health and promote plant growth and are significant in improving the sustainability of agriculture (Kumar and Nautiyal, 2022). Fungi and bacteria isolated from parts of plants can be cultured in the laboratory under the most desirable growth conditions to synthesize NPs with the needed characteristics for application in the agricultural sector (Elnahal et al, 2022).…”

Section: Effect Of Nps On Drought Stressmentioning

confidence: 99%

Synergistic relationship of endophyte-nanomaterials to alleviate abiotic stress in plants

Adeleke

Akinola

Adedayo

et al. 2022

Front. Environ. Sci.

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Plant responses to abiotic stresses through diverse mechanisms and strategic measures in utilizing nanomaterials have positively impacted crop productivity. Stress can cause membrane depletion, reactive oxygen species formation, cell toxicity and death, and reduction in plant growth. However, nanomaterials can mitigate some of the negative impacts of abiotic stresses and enhance crop yield. Some endophytic microbes can synthesize nanomaterials, which can maintain and enhance plant health and growth via nitrogen fixation, siderophore production, phytohormones synthesis, and enzyme production without any pathological effects. Nanoparticle-synthesizing endophytes also help boost plant biochemical and physiological functions by ameliorating the impact of abiotic stresses. The increase in the use and implementation of nano-growth enhancers from beneficial microbes, such as nano-biofertilizers, nano-pesticides, nano-herbicides, and nano-fungicides are considered safe and eco-friendly in ensuring sustainable agriculture and reduction of agrochemical usage. Promisingly, nanotechnology concepts in agriculture aim to sustain plant health and protect plants from oxidative stresses through the activation of anti-oxidative enzymes. The mechanisms and the use of nanomaterials to relieve abiotic plant stress still require further discussion in the literature. Therefore, this review is focused on endophytic microbes, the induction of abiotic stress tolerance in plants, and the use of nanomaterials to relieve abiotic plant stresses.

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“…Moreover, some of them also generate volatile organic compounds (VOCs) to interfere with quorum sensing of phytopathogens, synthesize siderophores for iron competition with phytopathogens, produce hydrolytic enzymes and antibiotics to kill phytopathogens, and induce systematic-acquired resistance (SAR) to strengthen the host immune system. Furthermore, some PGPB are able to produce antiherbivore compounds (e.g., alkaloids) and toxins to deter feeding by insects and other herbivores ( Wani et al., 2015 ; White et al., 2019 ; Kumar and Nautiyal, 2022 ). Some endophytic bacteria also protect their host from metal toxicities and remediate metal-contaminated fields ( Franco-Franklin et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Endophytic bacterial communities in wild rice (Oryza officinalis) and their plant growth-promoting effects on perennial rice

et al. 2023

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Endophytic bacterial microbiomes of plants contribute to the physiological health of the host and its adaptive evolution and stress tolerance. Wild rice possesses enriched endophytic bacteria diversity, which is a potential resource for sustainable agriculture. Oryza officinalis is a unique perennial wild rice species in China with rich genetic resources. However, endophytic bacterial communities of this species and their plant growth-promoting (PGP) traits remain largely unknown. In this study, endophytic bacteria in the root, stem, and leaf tissues of O. officinalis were characterized using 16S rRNA gene Illumina sequencing. Culturable bacterial endophytes were also isolated from O. officinalis tissues and characterized for their PGP traits. The microbiome analysis showed a more complex structure and powerful function of the endophytic bacterial community in roots compared with those in other tissue compartments. Each compartment had its specific endophytic bacterial biomarkers, including Desulfomonile and Ruminiclostridium for roots; Lactobacillus, Acinetobacter, Cutibacterium and Dechloromonas for stems; and Stenotrophomonas, Chryseobacterium, Achromobacter and Methylobacterium for leaves. A total of 96 endophytic bacterial strains with PGP traits of phosphate solubilization, potassium release, nitrogen fixation, 1-aminocyclopropane-1-carboxylate (ACC) deaminase secretion, and siderophore or indole-3-acetic acid (IAA) production were isolated from O. officinalis. Among them, 11 strains identified as Enterobacter mori, E. ludwigii, E. cloacae, Bacillus amyloliquefaciens, B. siamensis, Pseudomonas rhodesiae and Kosakonia oryzae were selected for inoculation of perennial rice based on their IAA production traits. These strains showed promising PGP effects on perennial rice seedlings. They promoted plants to form a strong root system, stimulate biomass accumulation, and increase chlorophyll content and nitrogen uptake, which could fulfil the ecologically sustainable cultivation model of perennial rice. These results provide insights into the bacterial endosphere of O. officinalis and its application potential in perennial rice. There is the prospect of mining beneficial endophytic bacteria from wild rice species, which could rewild the microbiome of cultivated rice varieties and promote their growth.

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Plant Abiotic and Biotic Stress Alleviation: From an Endophytic Microbial Perspective

Cited by 17 publications

References 94 publications

Finger Millet (Eleusine coracana) Plant–Endophyte Dynamics: Plant Growth, Nutrient Uptake, and Zinc Biofortification

Finger Millet (Eleusine coracana) Plant–Endophyte Dynamics: Plant Growth, Nutrient Uptake, and Zinc Biofortification

Synergistic relationship of endophyte-nanomaterials to alleviate abiotic stress in plants

Endophytic bacterial communities in wild rice (Oryza officinalis) and their plant growth-promoting effects on perennial rice

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