Microbial bioformulation-based plant biostimulants: a plausible approach toward next generation of sustainable agriculture

Aamir, Mohd; Krishna, K. R.; Zehra, Andleeb; Dubey, Manish Kumar; Kumar, Sunil; Shukla, Vaishali; Upadhyay, Ram Sanmukh

doi:10.1016/b978-0-12-819654-0.00008-9

Cited by 45 publications

(32 citation statements)

References 83 publications

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“…The world population is increasing at an alarming rate and is set to reach 9 billion by the year 2050, while the land available for agriculture has been decreasing due to industrialization (Aamir et al, 2020). Food production has increased through advances in agriculture such as the use of chemical pesticides and fertilizers, as well as breeding efforts to develop plant cultivars that are more productive and more stress tolerant (Aamir et al, 2020). However, plant productivity is still impacted by different environmental stresses such as drought, salinity, and limited nutrient availability (Basu et al, 2017;Aamir et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Long Term Comparison of Talc- and Peat-Based Phytobeneficial Pseudomonas fluorescens and Pseudomonas synxantha Bioformulations for Promoting Plant Growth

Novinscak

Filion

2020

Front. Sustain. Food Syst.

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Use of plant growth promoting rhizobacteria (PGPR) is an important strategy in sustainable agriculture. Among PGPR, many Pseudomonas strains are of great interest due to their abilities to colonize and thrive in the rhizosphere, in addition to displaying mechanisms in plant growth promotion and biocontrol activities. However, as Pseudomonas strains are non-spore forming micro-organisms, their development into stable bioformulations for commercial applications can be difficult. This study examined over a long term period the effect of two different carriers, peat and talc, to prepare bioformulations using phytobeneficial Pseudomonas strains belonging to two taxonomical groups of interest: P. fluorescens and P. synxantha. Each strain has previously demonstrated plant growth promotion activity when inoculated in the rhizosphere. Each bioformulation was stored at ambient temperature and their viability was measured up to 180 days. In parallel, every 30 days (up to 180 days) each bioformulation was also applied in the rhizosphere of plantlets to validate their plant growth promotion activity, and their establishment in the rhizosphere was quantified by using strain-specific quantitative polymerase chain reaction assays. The viability of both Pseudomonas strains in the bioformulations was found to decrease after the first 15 days and remained relatively stable for up to 180 days. When applying the bioformulations to Buglossoides arvensis plantlets, the expected plant growth promotion was observed when using up to 180 day-old formulations of P. fluorescens and up to 120 day-old formulations of P. synxantha, with similar results for both carriers. Establishment of both Pseudomonas strains in the rhizosphere inoculated with the peat-based carrier bioformulations stored for up to 180 days was found to be stable. While a lower establishment of P. fluorecens in the rhizosphere was observed when talc-based bioformulations were stored for 90 days or more, rhizosphere colonization by P. synxantha talc-based bioformulations remained stable for up to 180 days. In conclusion, both peat and talc appear to be suitable carriers for Pseudomonas bioformulations, however strain-specific variability exists and therefore the viability of each Pseudomonas strain and its capacity to maintain its plant growth promotion activity should be validated in different substrates before determining which formulation to use.

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Section: Introductionmentioning

confidence: 99%

Long Term Comparison of Talc- and Peat-Based Phytobeneficial Pseudomonas fluorescens and Pseudomonas synxantha Bioformulations for Promoting Plant Growth

Novinscak

Filion

2020

Front. Sustain. Food Syst.

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“…However, there are several biofertilizer and biocontrol products of mycorrhizal fungi available, based mainly on strains of Glomus iranicum , to improve crop absorption of water and nutrients, as well as tolerance towards nematodes. Other mycorrhizal inoculants contain spores of Rhizofagus irregularis , Funneliformis mossae , and Claroideoglomus etunicatum for improved fruit production ( Table S1 ) [ 45 ].…”

Section: Microorganisms Used In Biocontrol and Biofertilizationmentioning

confidence: 99%

“…There are also several soil-associated fungi used in agriculture for increasing crop health and fitness ( Supplementary Table S1 ). For example, Penicillium bilaiae is a rhizospheric fungus that, like mycorrhizal fungi, helps the plant in phosphate acquisition [ 45 , 58 ]. Members of rhizospheric and epiphytic Trichoderma spp.…”

Section: Microorganisms Used In Biocontrol and Biofertilizationmentioning

confidence: 99%

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Biofertilizers and Biocontrol Agents for Agriculture: How to Identify and Develop New Potent Microbial Strains and Traits

et al. 2021

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Microbiological tools, biofertilizers, and biocontrol agents, which are bacteria and fungi capable of providing beneficial outcomes in crop plant growth and health, have been developed for several decades. Currently we have a selection of strains available as products for agriculture, predominantly based on plant-growth-promoting rhizobacteria (PGPR), soil, epiphytic, and mycorrhizal fungi, each having specific challenges in their production and use, with the main one being inconsistency of field performance. With the growing global concern about pollution, greenhouse gas accumulation, and increased need for plant-based foods, the demand for biofertilizers and biocontrol agents is expected to grow. What are the prospects of finding solutions to the challenges on existing tools? The inconsistent field performance could be overcome by using combinations of several different types of microbial strains, consisting various members of the full plant microbiome. However, a thorough understanding of each microbiological tool, microbial communities, and their mechanisms of action must precede the product development. In this review, we offer a brief overview of the available tools and consider various techniques and approaches that can produce information on new beneficial traits in biofertilizer and biocontrol strains. We also discuss innovative ideas on how and where to identify efficient new members for the biofertilizer and biocontrol strain family.

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“…Moreover, according to the presently available literature, less than 25% of the commercial products of biostimulants are microbial-based [9]. As shown in Table 1 provides a list of some popular PGPR-based commercial biostimulants [29][30][31]. Although, some formulations contain fungal associations also, however, the preparations are mainly based on PGPR.…”

Section: Introductionmentioning

confidence: 99%

Bacterial Plant Biostimulants: A Sustainable Way Towards Improving Growth, Productivity, and Health of Crops

Hamid¹,

Zaman²,

Farooq³

et al. 2021

Preprint

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This review presents a comprehensive and systematic study of the field of bacterial plant biostimulants and considers the fundamental and innovative principles underlying this technology. Plant biostimulants are an important tool for modern agriculture as part of an integrated crop management (ICM) system; helping make agriculture more sustainable and resilient. Plant biostimulants contain substance(s) and/or microorganisms whose function when applied to plants or the rhizosphere, is to stimulate natural processes to enhance plant nutrient uptake, nutrient use efficiency, tolerance to abiotic stress, biocontrol, and crop quality. The use of plant biostimulants has gained substantial and significant heed worldwide as an environment-friendly alternative for sustainable agricultural production. Presently, there is an increasing curiosity of industry and researchers in microbial biostimulants especially, bacterial plant biostimulants (BPBs) to improve crop growth and productivity. The BPBs that are based on PGPR (plant growth-promoting rhizobacteria) play plausible roles to promote/stimulate the crop plant growth through several mechanisms that include, i) nutrient acquisition by nitrogen (N2) fixation and solubilization of insoluble minerals (P, K, Zn), organic acids and siderophores, ii) antimicrobial metabolites and various lytic enzymes, iii) action of growth regulators and stress-responsive/induced phytohormones, iv) ameliorating abiotic stress like drought, high soil salinity, extreme temperatures, oxidative stress, and heavy metals by using different modes of action, and v) plant defense induction modes. Presenting here is a brief review emphasizing the applicability of BPBs as an innovative exertion to fulfill the current food crisis.

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Microbial bioformulation-based plant biostimulants: a plausible approach toward next generation of sustainable agriculture

Cited by 45 publications

References 83 publications

Long Term Comparison of Talc- and Peat-Based Phytobeneficial Pseudomonas fluorescens and Pseudomonas synxantha Bioformulations for Promoting Plant Growth

Long Term Comparison of Talc- and Peat-Based Phytobeneficial Pseudomonas fluorescens and Pseudomonas synxantha Bioformulations for Promoting Plant Growth

Biofertilizers and Biocontrol Agents for Agriculture: How to Identify and Develop New Potent Microbial Strains and Traits

Bacterial Plant Biostimulants: A Sustainable Way Towards Improving Growth, Productivity, and Health of Crops

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