Biofertilizers: A Timely Approach for Sustainable Agriculture

Tomer, Supriya; Suyal, Deep Chandra

doi:10.1007/978-981-10-2854-0_17

Cited by 35 publications

(25 citation statements)

References 64 publications

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“…Moreover, these biofertilizers are safe and non-toxic to the environment. PSMs secrete organic acids like citric acid, oxalic acid, and succinic acids; enzymes like phosphatases and phytases; and ion chelators like siderophores that readily make phosphorus available to plants (Tomer et al 2016). Plant growth promotion is another attribute of PSMs.…”

Section: Introductionmentioning

confidence: 99%

Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Rawat

Das

Shankhdhar

et al. 2020

J Soil Sci Plant Nutr

280

130

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Phosphorus is the second most critical macronutrient after nitrogen required for metabolism, growth, and development of plants. Despite the abundance of phosphorus in both organic and inorganic forms in the soil, it is mostly unavailable for plant uptake due to its complexation with metal ions in the soil. The use of agrochemicals to satisfy the demand for phosphorus to improve crop yield has led to the deterioration of the ecosystem and soil health, as well as an imbalance in the soil microbiota. Consequently, there is a demand for an alternate cost-effective and eco-friendly strategy for the biofortification of phosphorus. One such strategy is the application of phosphate-solubilizing microorganisms which can solubilize insoluble phosphates in soil by different mechanisms like secretion of organic acids, enzyme production, and excretion of siderophores that can chelate the metal ions and form complexes, making phosphates available for plant uptake. These microbes not only solubilize phosphates but also promote plant growth and crop yield by producing plant-growth-promoting hormones like auxins, gibberellins, and cytokinins, antibiosis against pathogens, 1-aminocyclopropane-1-carboxylic acid deaminase which enhances plant growth under stress conditions, improving plant resistance to heavy metal toxicity, and so on. Pyrroloquinoline quinine (pqq) and glucose dehydrogenase (gcd) are the representative genes for phosphorus solubilization in microorganisms. The content presented in this review paper focuses on different mechanisms and modes of action of phosphate-solubilizing microorganisms, their contribution to phosphorus solubilization, growth-promoting attributes in plants, and the molecular aspects of phosphorus solubilization.

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Section: Introductionmentioning

confidence: 99%

Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Rawat

Das

Shankhdhar

et al. 2020

J Soil Sci Plant Nutr

280

130

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“…Plant growth-promoting fungi (PGPF) are heterogeneous group of nonpathogenic fungi that live freely in the root surface or the interior of the root itself or the rhizosphere and mediate improvements in seed germination, seedling vigor, plant growth, flowering and productivity of a wide range of host plants (Hossain et al 2017). Plant growth promotion derived from plant-PGPF interactions mainly attributes to the production of plant growth-promoting compounds such as phytohormones and secondary metabolites, the enhanced nutrient availability, the amelioration of abiotic and biotic stresses, and the antagonism to phytopathogens (Bonfante and Genre 2010; Hock 2012; Tomer et al 2016; Varma et al 2017; Vijayabharathi et al 2016; Yan et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Growth improvement of Lolium multiflorum Lam. induced by seed inoculation with fungus suspension of Xerocomus badius and Serendipita indica

Liu

et al. 2019

AMB Expr

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In this study, a pot experiment was carried out in greenhouse to investigate the potentials of Xerocomus badius and Serendipita indica to penetrate and colonize roots of ryegrass (Lolium multiflorum Lam.) and to induce beneficial effects on seed germination and seedling growth. The results showed that X. badius and S. indica successfully colonized in the root system of L. multiflorum seedlings and the root colonization rate was 72.65% and 88.42%, respectively. By microscopy, the hyphae, chlamydospores and spores produced by S. indica were observed in roots cortex of L. multiflorum seedlings. In comparison with the non-inoculated seedlings, seedlings inoculated with X. badius and S. indica showed significant increase in growth parameters with plant height, basal diameter, biomass accumulation, relative growth rate, leaf relative water content and chlorophyll content. Also, we found that seedlings inoculated with S. indica exhibited a greater growth-promotion as compared with X. badius-inoculated seedlings. No significant influence of the two fungus application has been observed with respect to seed germination. It suggested that well establishments of mutualistic symbiosis between L. multiflorum and X. badius or S. indica were not so essential to seed germination but contributed highly to the survival and growth of the seedlings.

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“…A biologically-active product or microbial inoculant/formulation containing one or more beneficial microbes, conserving and mobilizing crop nutrients in the soil [21] A preparation containing one or more species of microorganisms with the ability to mobilize important plant nutrients from non-usable form to usable forms [22,23] A formulated product containing one or more microbes enhancing the nutrient status of soil and promoting plant growth by availing nutrients and increasing plant access to nutrients 9 [24] A unique, eco-friendly, and cost-effective alternative to chemical fertilizers that improve crop productivity and soil health sustainably [25] A formulation or preparation containing latent or live microorganisms with effective and long-term storage, ease of handling, and delivery of the live microbes from the factory/lab to the field [10] A microbial inoculant which colonizes the rhizosphere and improves plant growth by enhancing nutrient accessibility to plants [26] A natural product containing a large population of specific beneficial microorganisms for enhancing soil productivity either by fixing atmospheric N, solubilizing P or stimulating plant growth through the synthesis of PGP substances [27] A mixture of an active ingredient with a formulated product with inactive or inert substances.…”

Section: Literature Provided Definition [20]mentioning

confidence: 99%

“…However, these chemicals have several negative effects on the environment as outlined by several workers [7][8][9]. Ironically, the long-term effects of chemical fertilizers also include the overall deterioration of soil quality and productivity [1] and soil acidification which ultimately reduces agricultural productivity [10,11].…”

Section: Introductionmentioning

confidence: 99%

Plant Growth Promoting Rhizobacterial Biofertilizers for Sustainable Crop Production: The Past, Present, and Future

Aloo¹,

Makumba²,

Mbega³

2020

Preprint

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The world’s population is increasing and so are agricultural activities to match the growing demand for food. Conventional agricultural practices generally employ artificial fertilizers to increase crop yields, but these have multiple environmental and human health effects. For decades, environmentalists and sustainability researchers have focused on alternative crop fertilization mechanisms to address these challenges, and biofertilizers have constantly been researched, recommended, and even successfully-adopted for several crops. Biofertilizers are microbial formulations made of indigenous plant growth-promoting rhizobacteria (PGPR) which can naturally improve plant growth either directly or indirectly, through the production of phytohormones, solubilization of soil nutrients, and production of iron-binding metabolites; siderophores. Biofertilizers, therefore, hold immense potential as tools for sustainable crop production especially in the wake of climate change and global warming. Despite the mounting interest in this technology, their full potential has not yet been realized. This review updates our understanding of the PGPR biofertilizers and sustainable crop production. It evaluates the history of these microbial products, assesses their present state of utilization, and also critically propounds on their future prospects for sustainable crop production. Such information is desirable to fully evaluate their potential and can ultimately pave the way for their increased adoption for crop production.

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Biofertilizers: A Timely Approach for Sustainable Agriculture

Cited by 35 publications

References 64 publications

Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Growth improvement of Lolium multiflorum Lam. induced by seed inoculation with fungus suspension of Xerocomus badius and Serendipita indica

Plant Growth Promoting Rhizobacterial Biofertilizers for Sustainable Crop Production: The Past, Present, and Future

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