www.journalworlds.com
AGRI JOURNAL WORLD
VOLUME 4 ISSUE 9 SEPTEMBER, 2024
ROLE OF ANTIBIOTICS IN PLANT DISEASE CONTROL
Sagnik Ghosh and Amitava Mondal*
Faculty of Agriculture, JIS University, Agarpara, Kolkata, West Bengal-700109, India
*Corresponding author:
ABSTRACT
Antibiotics, secondary metabolites produced by microorganisms, can
inhibit or kill other microorganisms at low concentrations. Their selective
action against plant pathogens, low phytotoxicity, and ability to be absorbed
through foliage and translocated systemically make them effective in managing
plant diseases, particularly those caused by bacteria, mycoplasma, and
rickettsia. Antibiotics do not participate in primary metabolic processes such
as cell wall formation or energy production. The use of antibiotic mixtures is
common to prevent or delay resistance development in pathogens, enhancing
their efficacy in disease management.
KEYWORDS: Antibiotics, Classification, Mechanisms, Plant diseases management
INTRODUCTION
The proliferation of plant pathogens, primarily bacterial and fungal, has necessitated an exigent
intervention of antimicrobial agents, known colloquially as antibiotics, within the agronomic domain.
These chemical compounds, either naturally derived from microbial entities or synthetically fabricated,
serve as a bulwark against the onslaught of phytopathogens that threaten the productivity, quality, and
economic viability of diverse crops (Coomes et al., 2019). The utilization of antibiotics in plant disease
control, while historically overshadowed by their application in human and veterinary medicine, has
emerged as a critical component of integrated plant disease management (IPDM) strategies, particularly
in scenarios where conventional fungicides and bactericides fail to provide adequate protection. Plant
pathogenic bacteria (PPB) cause approximately one billion dollars in crop losses annually, mostly in
grapevines, pear and apple orchards, paddy along other crops across the world and also growing risks are
numerous different plant diseases. The deployment of antibiotics in agriculture, however, is not without
its controversies, primarily concerning the emergence of antibiotic-resistant strains of pathogens and the
potential implications for human health (Chang et al., 2015). This discourse aims to elucidate the
multifaceted role of antibiotics in plant disease management by exploring their classifications,
mechanisms of action, efficacy against specific plant pathogens, and the commercial availability of these
compounds within the Indian agricultural market. This analysis will be grounded in rigorous scientific
Page | 23
, www.journalworlds.com
AGRI JOURNAL WORLD
VOLUME 4 ISSUE 9 SEPTEMBER, 2024
inquiry, drawing upon contemporary research to provide a thorough understanding of the subject matter.
Thus, farmers around the world frequently turn to antibiotics as a straightforward and efficient method for
the management of bacterial diseases.
CLASSIFICATION OF ANTIBIOTICS USED IN PLANT DISEASE
MANAGEMENT
The classification of antibiotics employed in plant disease control can be delineated based on their
origin, spectrum of activity, and mechanism of action. These classifications provide a framework for
understanding the diverse array of antibiotics that have been harnessed in agricultural practices (Saikia
and Chetia, 2024).
1) Origin-Based Classification: Antibiotics utilized in plant disease management can be broadly
categorized into two primary groups based on their origin:
a) Naturally Occurring Antibiotics: These antibiotics are derived from microorganisms, primarily
bacteria and fungi, that naturally produce these compounds as a defense mechanism against
competing microbial species. The majority of antibiotics used in plant disease control belong to this
category, as they are often more environmentally friendly and biodegradable.
b) Synthetic Antibiotics: These are chemically synthesized compounds designed to mimic or enhance
the activity of naturally occurring antibiotics. Synthetic antibiotics are often engineered to possess
broader spectra of activity, greater stability, and improved resistance to environmental degradation.
2) Based on Spectrum of Activity:
a) Broad-Spectrum Antibiotics: These target a wide range of pathogens, including both Gram-positive
and Gram-negative bacteria. Tetracycline is an example.
b) Narrow-Spectrum Antibiotics: These are effective against specific pathogens. For example,
Streptomycin is primarily effective against bacterial plant pathogens like Xanthomonas spp.
3) Mode/Mechanism of Action-Based Classification
The mechanism by which antibiotics exert their antimicrobial effects can vary significantly. The primary
mechanisms of action include:
a) Inhibition of Cell Wall Synthesis: Antibiotics such as β-lactams (e.g., penicillin) inhibit the
synthesis of the bacterial cell wall, leading to cell lysis and death. This mechanism is particularly
effective against Gram-positive bacteria, which possess a thick peptidoglycan layer in their cell walls.
Page | 24
AGRI JOURNAL WORLD
VOLUME 4 ISSUE 9 SEPTEMBER, 2024
ROLE OF ANTIBIOTICS IN PLANT DISEASE CONTROL
Sagnik Ghosh and Amitava Mondal*
Faculty of Agriculture, JIS University, Agarpara, Kolkata, West Bengal-700109, India
*Corresponding author:
ABSTRACT
Antibiotics, secondary metabolites produced by microorganisms, can
inhibit or kill other microorganisms at low concentrations. Their selective
action against plant pathogens, low phytotoxicity, and ability to be absorbed
through foliage and translocated systemically make them effective in managing
plant diseases, particularly those caused by bacteria, mycoplasma, and
rickettsia. Antibiotics do not participate in primary metabolic processes such
as cell wall formation or energy production. The use of antibiotic mixtures is
common to prevent or delay resistance development in pathogens, enhancing
their efficacy in disease management.
KEYWORDS: Antibiotics, Classification, Mechanisms, Plant diseases management
INTRODUCTION
The proliferation of plant pathogens, primarily bacterial and fungal, has necessitated an exigent
intervention of antimicrobial agents, known colloquially as antibiotics, within the agronomic domain.
These chemical compounds, either naturally derived from microbial entities or synthetically fabricated,
serve as a bulwark against the onslaught of phytopathogens that threaten the productivity, quality, and
economic viability of diverse crops (Coomes et al., 2019). The utilization of antibiotics in plant disease
control, while historically overshadowed by their application in human and veterinary medicine, has
emerged as a critical component of integrated plant disease management (IPDM) strategies, particularly
in scenarios where conventional fungicides and bactericides fail to provide adequate protection. Plant
pathogenic bacteria (PPB) cause approximately one billion dollars in crop losses annually, mostly in
grapevines, pear and apple orchards, paddy along other crops across the world and also growing risks are
numerous different plant diseases. The deployment of antibiotics in agriculture, however, is not without
its controversies, primarily concerning the emergence of antibiotic-resistant strains of pathogens and the
potential implications for human health (Chang et al., 2015). This discourse aims to elucidate the
multifaceted role of antibiotics in plant disease management by exploring their classifications,
mechanisms of action, efficacy against specific plant pathogens, and the commercial availability of these
compounds within the Indian agricultural market. This analysis will be grounded in rigorous scientific
Page | 23
, www.journalworlds.com
AGRI JOURNAL WORLD
VOLUME 4 ISSUE 9 SEPTEMBER, 2024
inquiry, drawing upon contemporary research to provide a thorough understanding of the subject matter.
Thus, farmers around the world frequently turn to antibiotics as a straightforward and efficient method for
the management of bacterial diseases.
CLASSIFICATION OF ANTIBIOTICS USED IN PLANT DISEASE
MANAGEMENT
The classification of antibiotics employed in plant disease control can be delineated based on their
origin, spectrum of activity, and mechanism of action. These classifications provide a framework for
understanding the diverse array of antibiotics that have been harnessed in agricultural practices (Saikia
and Chetia, 2024).
1) Origin-Based Classification: Antibiotics utilized in plant disease management can be broadly
categorized into two primary groups based on their origin:
a) Naturally Occurring Antibiotics: These antibiotics are derived from microorganisms, primarily
bacteria and fungi, that naturally produce these compounds as a defense mechanism against
competing microbial species. The majority of antibiotics used in plant disease control belong to this
category, as they are often more environmentally friendly and biodegradable.
b) Synthetic Antibiotics: These are chemically synthesized compounds designed to mimic or enhance
the activity of naturally occurring antibiotics. Synthetic antibiotics are often engineered to possess
broader spectra of activity, greater stability, and improved resistance to environmental degradation.
2) Based on Spectrum of Activity:
a) Broad-Spectrum Antibiotics: These target a wide range of pathogens, including both Gram-positive
and Gram-negative bacteria. Tetracycline is an example.
b) Narrow-Spectrum Antibiotics: These are effective against specific pathogens. For example,
Streptomycin is primarily effective against bacterial plant pathogens like Xanthomonas spp.
3) Mode/Mechanism of Action-Based Classification
The mechanism by which antibiotics exert their antimicrobial effects can vary significantly. The primary
mechanisms of action include:
a) Inhibition of Cell Wall Synthesis: Antibiotics such as β-lactams (e.g., penicillin) inhibit the
synthesis of the bacterial cell wall, leading to cell lysis and death. This mechanism is particularly
effective against Gram-positive bacteria, which possess a thick peptidoglycan layer in their cell walls.
Page | 24
