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Establishing Fungal Entomopathogens as Endophytes: Towards Endophytic Biological Control

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Published on: April 11, 2013

Bambara Groundnut Rhizobacteria Antimicrobial and Biofertilization Potential.

Caroline F Ajilogba^1,2, Olubukola O Babalola¹, Patrick Adebola^3,4

¹Niche Area for Food Security and Safety, Faculty of Natural and Agricultural Science, North-West University, Mmabatho, South Africa.

Frontiers in Plant Science

|August 1, 2022

Summary

Rhizobacteria from Bambara groundnut soil show potential as biofertilizers and biocontrol agents. These plant growth-promoting Bacillus isolates enhance crop growth and yield, supporting sustainable agriculture.

Keywords:

Bacillus bambara groundnut biocontrol biofertilizer plant growth-promoting rhizobacteria rhizobacteria rhizosphere

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Area of Science:

Agricultural Microbiology
Plant Science
Soil Science

Background:

Bambara groundnut is an underutilized African crop vital for food security.
Its rhizosphere harbors unexplored Rhizobacteria with potential for plant growth promotion.
Unfavorable soil conditions do not hinder Rhizobacteria colonization and adaptation.

Purpose of the Study:

To investigate Bambara groundnut rhizobacteria for biofertilizer and biocontrol potential.
To assess their role in promoting sustainable agriculture in Africa and globally.
To identify specific bacterial species and their plant growth-promoting attributes.

Main Methods:

Rhizospheric soil samples were collected and analyzed for chemical composition.
Rhizobacteria were isolated, cultured, and screened for plant growth-promoting and antifungal activities.
Phylogenetic analysis using 16S rRNA identified bacterial isolates.
A 2-year field study evaluated the efficacy of rhizobacteria as biofertilizers for Bambara groundnut (Vigna subterranean).

Main Results:

All isolates produced ammonia and 1-aminocyclopropane-1-carboxylate.
Significant percentages produced hydrogen cyanide (4.65%), indole acetic acid (12.28%), and solubilized phosphate (27.91%).
Field trials demonstrated significant positive effects of rhizobacteria treatment on Bambara groundnut growth and yield compared to controls.
Identified isolates included B. amyloliquefaciens, B. thuringiensis, and Bacillus sp.

Conclusions:

Rhizobacteria from Bambara groundnut rhizosphere possess significant plant growth-promoting properties.
These Bacillus isolates can be utilized as effective biofertilizers to enhance crop growth and yield.
This study pioneers the application of Bambara groundnut rhizobacteria as biofertilizers, contributing to sustainable agriculture.