Enhancing Soil Health and Plant Growth Promotion by Actinomycetes

Jog, Rahul; Nareshkumar, G.; Rajkumar, Shalini

doi:10.1007/978-981-10-0707-1_3

Cited by 37 publications

(31 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, amendment of cereal-grown soils with biologically active actinomycetes isolates improved their physical and chemical characteristics [ 22 ]. This is because actinomycetes are involved in organic matter cycling, fixation of atmospheric nitrogen, solubilization of phosphate, and suppression of plant pathogens [ 2 , 16 , 47 ]. Moreover, the observed increased soil content of elements after enrichment with actinomycetes could be explained by the chelating properties of the phenolics and flavonoids secreted by the actinomycetes.…”

Section: Discussionmentioning

confidence: 99%

Actinomycetes Enrich Soil Rhizosphere and Improve Seed Quality as well as Productivity of Legumes by Boosting Nitrogen Availability and Metabolism

et al. 2020

View full text Add to dashboard Cite

The use of actinomycetes for improving soil fertility and plant production is an attractive strategy for developing sustainable agricultural systems due to their effectiveness, eco-friendliness, and low production cost. Out of 17 species isolated from the soil rhizosphere of legume crops, 4 bioactive isolates were selected and their impact on 5 legumes: soybean, kidney bean, chickpea, lentil, and pea were evaluated. According to the morphological and molecular identification, these isolates belong to the genus Streptomyces. Here, we showed that these isolates increased soil nutrients and organic matter content and improved soil microbial populations. At the plant level, soil enrichment with actinomycetes increased photosynthetic reactions and eventually increased legume yield. Actinomycetes also increased nitrogen availability in soil and legume tissue and seeds, which induced the activity of key nitrogen metabolizing enzymes, e.g., glutamine synthetase, glutamate synthase, and nitrate reductase. In addition to increased nitrogen-containing amino acids levels, we also report high sugar, organic acids, and fatty acids as well as antioxidant phenolics, mineral, and vitamins levels in actinomycete treated legume seeds, which in turn improved their seed quality. Overall, this study shed the light on the impact of actinomycetes on enhancing the quality and productivity of legume crops by boosting the bioactive primary and secondary metabolites. Moreover, our findings emphasize the positive role of actinomycetes in improving the soil by enriching its microbial population. Therefore, our data reinforce the usage of actinomycetes as biofertilizers to provide sustainable food production and achieve biosafety.

show abstract

Section: Discussionmentioning

confidence: 99%

Actinomycetes Enrich Soil Rhizosphere and Improve Seed Quality as well as Productivity of Legumes by Boosting Nitrogen Availability and Metabolism

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Besides producing siderophores and solubilizing phosphate, they are known to produce various enzymes—including amylase, chitinase, cellulase, invertase, lipase, keratinase, peroxidase, pectinase, protease, phytase, and xylanase—which make the complex nutrients into simple mineral forms. This nutrient cycling capacity makes them ideal candidates for natural fertilizers [ 65 ]. The relationship between PGPS and their host plant and the biochemical processes involved deserve deeper investigation.…”

Section: Streptomyces Spp As Plant Growth Prommentioning

confidence: 99%

Plant Growth Promoting and Biocontrol Activity of Streptomyces spp. as Endophytes

Vurukonda

Giovanardi

Stefani

2018

IJMS

481

252

View full text Add to dashboard Cite

There has been many recent studies on the use of microbial antagonists to control diseases incited by soilborne and airborne plant pathogenic bacteria and fungi, in an attempt to replace existing methods of chemical control and avoid extensive use of fungicides, which often lead to resistance in plant pathogens. In agriculture, plant growth-promoting and biocontrol microorganisms have emerged as safe alternatives to chemical pesticides. Streptomyces spp. and their metabolites may have great potential as excellent agents for controlling various fungal and bacterial phytopathogens. Streptomycetes belong to the rhizosoil microbial communities and are efficient colonizers of plant tissues, from roots to the aerial parts. They are active producers of antibiotics and volatile organic compounds, both in soil and in planta, and this feature is helpful for identifying active antagonists of plant pathogens and can be used in several cropping systems as biocontrol agents. Additionally, their ability to promote plant growth has been demonstrated in a number of crops, thus inspiring the wide application of streptomycetes as biofertilizers to increase plant productivity. The present review highlights Streptomyces spp.-mediated functional traits, such as enhancement of plant growth and biocontrol of phytopathogens.

show abstract

“…Actinobacteria produce approximately two-thirds of the known antibiotics produced by all microorganisms (Dhanasekaran et al, 2012;Feina et al, 2019). This nutrient cycling capacity makes them an ideal candidate for natural fertilizers (Jog et al, 2016;Olanrewaju and Babalola, 2019). In addition, the ubiquitous presence and possible global distribution of many of these actinobacteria suggest a great environmental tolerance.…”

Section: Box 2 | Features and Taxonomy Of Actinobacteriamentioning

confidence: 99%

From Isolation of Phosphate Solubilizing Microbes to Their Formulation and Use as Biofertilizers: Status and Needs

Soumaré

Boubekri

Lyamlouli

et al. 2020

Front. Bioeng. Biotechnol.

131

View full text Add to dashboard Cite

The production of biofertilizers at industrial level is a bottleneck because bacterial strains are generally developed and managed by research laboratories and not by production units. A seamless transition from laboratory to field application is, therefore necessary. This review provides an overview of the constraints that limiting the application or the implementation of Actinobacteria based biofertilizers especially in agricultural field and suggests solutions to overcome some of these limits. General processes of making and controlling the quality of the inoculum are briefly described. In addition, the paper underlines the opportunity of biofertilizers alone or in combination with chemical fertilizers. This review also, highlights the latest studies (until June 2019) and focuses on P-solubilization microorganisms mainly Actinobacteria. The biotechnology of these bacteria is a glimmer of hope for rock phosphate (RP) bioformulation. Since direct application of RP fertilizer is not always agronomically effective due to its sparse solubility.

show abstract

Enhancing Soil Health and Plant Growth Promotion by Actinomycetes

Cited by 37 publications

References 65 publications

Actinomycetes Enrich Soil Rhizosphere and Improve Seed Quality as well as Productivity of Legumes by Boosting Nitrogen Availability and Metabolism

Actinomycetes Enrich Soil Rhizosphere and Improve Seed Quality as well as Productivity of Legumes by Boosting Nitrogen Availability and Metabolism

Plant Growth Promoting and Biocontrol Activity of Streptomyces spp. as Endophytes

From Isolation of Phosphate Solubilizing Microbes to Their Formulation and Use as Biofertilizers: Status and Needs

Contact Info

Product

Resources

About