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Plant Promoter Analysis: Identification and Characterization of Root Nodule Specific Promoter in the Common Bean

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Published on: December 23, 2017

Plant-growth-promoting rhizobacteria.

Ben Lugtenberg¹, Faina Kamilova

¹Leiden University, Institute of Biology, Clusius Laboratory, 2333 AL Leiden, The Netherlands. b.j.j.lugtenberg@biology.leidenuniv.nl

Annual Review of Microbiology

|July 7, 2009

Summary

Plant-growth-promoting rhizobacteria (PGPR) enhance plant growth directly through biofertilization and stress control, or indirectly by suppressing diseases. These beneficial root bacteria colonize plant roots to deliver their growth-promoting effects.

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Area of Science:

Microbiology
Plant Science
Agronomy

Background:

Microbial products stimulating plant growth are widely marketed.
This review focuses on bacteria that promote plant growth on or in the root, known as plant-growth-promoting rhizobacteria (PGPR).
PGPR can influence plant development through direct or indirect mechanisms.

Purpose of the Study:

To review the conditions favoring bacterial life in the rhizosphere.
To describe bacterial traits essential for efficient root colonization.
To elucidate the diverse mechanisms by which PGPR promote plant growth.

Main Methods:

Literature review focusing on plant-growth-promoting rhizobacteria (PGPR).
Analysis of bacterial traits required for root colonization.
Categorization of direct and indirect plant growth promotion mechanisms.

Main Results:

Bacteria inhabit the rhizosphere under specific environmental conditions.
Efficient root colonization is crucial for PGPR efficacy.
Direct promotion includes biofertilization, root growth stimulation, rhizoremediation, and stress control.
Indirect promotion involves disease reduction via antibiosis, induced systemic resistance, and competition.

Conclusions:

Plant-growth-promoting rhizobacteria (PGPR) offer significant benefits to plant development.
Understanding PGPR colonization and mechanisms is key to agricultural applications.
PGPR represent a sustainable approach to enhance crop yield and health.