Isolation and characterization of plant growth promoting bacteria (PGPB) from the rhizosphere of Spinacea oleracea L.

Title

Isolation and characterization of plant growth promoting bacteria (PGPB) from the rhizosphere of Spinacea oleracea L.

Creator

Swetha J.; Sayantan D.

Description

As the years pass by, there is an increase in abiotic stress conditions around the environment that directly or indirectly affect agriculture around the world. Therefore, there is a dire need to increase the sustainability of plants. Plant Growth Promoting Bacteria (PGPB) play an important role in maintaining the physiology and growth of plants under various stress conditions. This study looks into the isolation and characterization of different PGPB from Spinacia oleracea L. and their tolerance against salinity and commonly used commercial pesticides against the Spinacia family. The techniques used are isolation by serial dilution, 16sRna sequencing, characterization of different PGPB assays for confirmation such as ammonia production, catalase test, phosphate solubilisation, potassium solubilization, siderophore production, indole-3-acetic acid production, biofilm formation assay, halotolerance and tolerance study using Minimal Inhibitory Concentration (MIC). PGPB were isolated and characterized from Spinacia oleracea L., which was under an abiotic stress environment. Isolates were Bacillus clarus, Bacillus licheniformis, Paenibacillus alvei SJ6 and Paenibacillus alvei SJ8, having quantities as high as 78.10.004 mgL-1 phosphate solubilization, 43.8 mgL?1 of indole-3-acetic acid production, 14.5660.011 psu of siderophore production and 0.62 0.027 mol mL?1 of ammonia production. All isolates also had considerable amounts of halotolerance up to 10%, whereas Bacillus licheniformis had 12.5% halotolerance. The bacterial isolates had considerable tolerance against commonly used commercial pesticides against green leafy vegetables such as chlorpyriphos + cypermethrin combination and fungicides such as mancozeb. Therefore, this study looks into the isolation of potential plant growth promoting bacteria that have considerable amount of halotolerance and pesticide tolerance. 2025 World Researchers Associations. All rights reserved.

Source

Research Journal of Biotechnology, Vol-20, No. 1, pp. 77-87.

Date

2025-01-01

Publisher

World Researchers Associations

Subject

Abiotic stress; Halotolerance; Pesticide; Plant Growth Promoting Bacteria (PGPB); Tolerance

Coverage

Swetha J., Department of Life Sciences, Christ University, Hosur Road, Karnataka, Bangalore, 560029, India; Sayantan D., Department of Life Sciences, Christ University, Hosur Road, Karnataka, Bangalore, 560029, India

Rights

Restricted Access

Relation

ISSN: 22784535

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.25303/201rjbt077087

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85214442012&doi=10.25303%2f201rjbt077087&partnerID=40&md5=fdfdb7957ac622c0fdc194a14d38f5b3