Role of Plant Growth-Promoting Rhizobacteria for Improving Crop Productivity in Sustainable Agriculture

Kashyap, Abhijeet Shankar; Pandey, Vijay Kumar; Manzar, Nazia; Kannojia, Pooja; Singh, Udai B.; Sharma, Pawan Kumar

doi:10.1007/978-981-10-6593-4_28

Cited by 17 publications

(10 citation statements)

References 90 publications

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“…On the other hand, many plant pathogens are indirectly controlled by PGPR by antibiosis and hydrolytic enzymes (Dobbelaere et al 2003;Kumar et al 2015). Under normal and stressed conditions, several documentary evidences confirm the better physiological and growth responses of diverse plant species to phytobeneficial bacteria (Kashyap et al 2017;Meena et al 2017) The PGPR inoculation either on seeds or plants helps to ameliorate the salinity stress consequences due to the activation of several signaling pathways (Shukla et al 2012). Salt-tolerant PGPR strains support the growth of plants by mitigating the cell oxidative damage and increasing uptake of nutrient ions (Akram et al 2016;Shahid et al 2018).…”

Section: Introductionmentioning

confidence: 91%

Non-pathogenic Staphylococcus strains augmented the maize growth through oxidative stress management and nutrient supply under induced salt stress

et al. 2019

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Purpose The present study was conducted to elucidate the role of phytobeneficial bacteria to control the cellular oxidative damage in maize (Zea mays L.) plants caused by salinity. Methods Bacteria were isolated from the rhizosphere of kallar grass (Leptochloa fusca L.) through serial dilution method and taxonomically identified on the basis of their 16S ribosomal RNA gene sequencing. In vitro phosphate solubilization, indole-3acetic acid (IAA) synthesis, and 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity were evaluated by solubilization index measurement, colorimetric method, and turbidity assay, respectively. In the pot experiment, the impact of single and mixed inoculation of these strains at four levels (0, 50, 100, and 200 mM) of salt stress was evaluated in terms of growth and physiological response of maize plants to salinity. Results The bacterial strains (STN-1, STN-5, and STN-14) were taxonomically classified as Staphylococcus spp. At 5% NaCl level, the strains demonstrated substantial potential for phosphate solubilization, ACC deaminase activity, and IAA production both with and without tryptophan. The inoculation of strains STN-1, STN-5, and mixed inoculation resulted in substantial growth improvement of maize plants along with increased antioxidant enzyme activity and decreased levels of reactive oxygen species. In addition, single inoculation of STN-1 and STN-5 along with mixed inoculation augmented the uptake of N, P, K, and Ca +2 and reduced Na + uptake. Conclusion Current results demonstrated that the strains STN-1 and STN-5 modulated stress-responsive mechanisms and regulated ion balance in induced salinity to promote maize growth.

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Section: Introductionmentioning

confidence: 91%

Non-pathogenic Staphylococcus strains augmented the maize growth through oxidative stress management and nutrient supply under induced salt stress

et al. 2019

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“…The Fe 3+ and microbial siderophores form a complex in the membrane in which the former is reduced to Fe 2+ and released into the cell through an input mechanism that links the outer and inner cell membranes. During this process, the siderophores can be destroyed or recycled [213] and the plants can access and assimilate the Fe 2+ from bacterial siderophores by direct up-take of the Fesiderophore complexes or by exchange reactions using appropriate ligands [214,215]. Siderophore production is a classic example of how rhizobacterial inoculants in biofertilizers can establish themselves in the plant rhizosphere and enhance Fe nutrition and due to its indisputable importance, should be given more attention [216].…”

Section: Iron Sequestersmentioning

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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“…Recently in (Kashyap et al, 2017) the bacterial genera of Bacillus, Streptomyces, Pseudomonas, Burkholderia, Agrobacterium, among others, were reported considering Azotobacter, Azospirillum, Enterobacter, Klebsiella, Serratia, Streptomyces, Variovorax (Rhizobia, Glick, reported 2012), as the most studied and most commercialized biological control agents such as RPCV inoculants that benefit plant growth. RPCVs act by at least one mechanism as bioprotectors reducing the development of phytopathogens, they also function as biofertilizers that capture and translocate nutrients, and also as biostimulants of phytohormones levels (Kashyap et al, 2017).…”

Section: Plant Growth Promoting Bacteriamentioning

confidence: 99%

“…The most documented metabolites include a wide range of broad-spectrum antibiotics, lytic enzymes, metabolic byproducts, proteinaceous exotoxin siderophores and antimicrobial peptides such as bacteriocins. Soil-isolated bacteria (rhizobacteria) and / or their metabolites have the ability to promote growth in different plants, which has been used as an alternative strategy to reduce the application of chemicals such as fertilizers and / or synthetic pesticides considered as the causes of catastrophic damage to the environment, human health and society (Subramanian and Smith, 2015;Kashyap et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Successful and unexpected potential of entomopathogen Bacillus thuringiensis as plant growth promoting rhizobacterium

Pérez-García

Castañeda-Ramírez

Lafuente-Rincón

et al. 2019

JNAS

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The microbiology of the rhizosphere has been investigated since 1904, revealing innumerable rhizomic microorganisms that promote growth in swamps (RPCPs), which have attracted a special interest to improve agroecological practices, crop productivity and protect soils from environmental contamination under a agricultural sustainability approach. This review addresses a topic as extensive as it is fascinating, beginning with the characteristics of soil microbiology. It also describes how RPCPs associated with plant roots offer greater crop growth through direct and indirect strategies. Also mention the complexity of plant growth and how it is done simultaneously through numerous metabolic activities. The bacterial genera of RPCP, the metabolic characteristics and the potential of entomopathogenic bacteria Bacillus thuringiensis (Bt) to be considered as RPCP are mentioned. Finally, the little known properties of Bt are exposed to benefit the growth of plants, their effectiveness in biocontrol of phytopathogens, as biofertilizers and / or biostimulants in crops. New perspectives are proposed to develop Bt products as a growth promoter in the near future. It is important to recognize that applied research of rhizosphere crops can be one of the key factors in achieving the sustainable yield of agriculture.

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Role of Plant Growth-Promoting Rhizobacteria for Improving Crop Productivity in Sustainable Agriculture

Cited by 17 publications

References 90 publications

Non-pathogenic Staphylococcus strains augmented the maize growth through oxidative stress management and nutrient supply under induced salt stress

Non-pathogenic Staphylococcus strains augmented the maize growth through oxidative stress management and nutrient supply under induced salt stress

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

Successful and unexpected potential of entomopathogen Bacillus thuringiensis as plant growth promoting rhizobacterium

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