Use of an abscisic acid-producing Bradyrhizobium japonicum isolate as biocontrol agent against bacterial wilt disease caused by Ralstonia solanacearum
Abstract Bacterial wilt disease in tomato (Solanum lycopersicum) is a serious threat in agriculture that significantly reduces the production. The aim of the present investigation was to search for an effective biocontrol measure against bacterial wilt disease in tomato. The causative agent (bacterial wilt disease) isolated from infested tomato plants was identified as Ralstonia solanacearum BR-001. Ralstonia solanacearum is considered as one of the most dangerous plant pathogens globally due to its wide host range. The disease progression caused by R. solanacearum is very fast and difficult to control. Several strategies like mineral oil, lytic phages, and antimicrobial metabolites produced by different virulent bacterial strains and medicinal plants have been reported to control the infection/ wilt disease caused by R. solanacearum. However, it is difficult to control the progression once it enters the xylem tissue. Furthermore, R. solanacearum produces two different types of DNases which help the bacteria to escape from the plant defense system. We also have isolated 43 bacterial candidates from the rhizospheres of few unaffected tomato plants from the same field. Interestingly, one out of 43 candidates exhibiting efficacy against R. solanacearum BR-001 in-vivo was identified as Bradyrhizobium japonicum BRC 2485. But no isolate was found to control disease progression effectively during in-vitro condition. To understand the biocontrol potential of B. japonicum BRC 2485, an in-vivo comparative study was conducted with one Bradyrhizobium type strain (MTCC 120) and one Bradyrhizobium reference strain (MCC 2940). The experimental evidence suggests that the priming of tomato plants with B. japonicum BRC 2485 limits the multiplication of R. solanacearum BR-001 therein. The Bradyrhizobium strains were tested for the production of siderophores, ethylene, and abscisic acid (ABA). All the experimental Bradyrhizobium strains were found to be negative for siderophore production and positive for ethylene production. However, only B. japonicum BRC 2485 was found to produce ABA, which plays a major role in triggering induced systemic resistance (ISR) in plants. To the best of authors’ knowledge, this is the first report of a strain of B. japonicum with activity against bacterial wilt disease..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:129 |
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| Enthalten in: |
Journal of plant diseases and protection - 129(2022), 4 vom: 22. Apr., Seite 869-879 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Chattopadhyay, Pritam [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| Themen: |
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| Anmerkungen: |
© The Author(s), under exclusive licence to Deutsche Phytomedizinische Gesellschaft 2022 |
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| doi: |
10.1007/s41348-022-00604-9 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
OLC2131256345 |
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| 245 | 1 | 0 | |a Use of an abscisic acid-producing Bradyrhizobium japonicum isolate as biocontrol agent against bacterial wilt disease caused by Ralstonia solanacearum |
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| 520 | |a Abstract Bacterial wilt disease in tomato (Solanum lycopersicum) is a serious threat in agriculture that significantly reduces the production. The aim of the present investigation was to search for an effective biocontrol measure against bacterial wilt disease in tomato. The causative agent (bacterial wilt disease) isolated from infested tomato plants was identified as Ralstonia solanacearum BR-001. Ralstonia solanacearum is considered as one of the most dangerous plant pathogens globally due to its wide host range. The disease progression caused by R. solanacearum is very fast and difficult to control. Several strategies like mineral oil, lytic phages, and antimicrobial metabolites produced by different virulent bacterial strains and medicinal plants have been reported to control the infection/ wilt disease caused by R. solanacearum. However, it is difficult to control the progression once it enters the xylem tissue. Furthermore, R. solanacearum produces two different types of DNases which help the bacteria to escape from the plant defense system. We also have isolated 43 bacterial candidates from the rhizospheres of few unaffected tomato plants from the same field. Interestingly, one out of 43 candidates exhibiting efficacy against R. solanacearum BR-001 in-vivo was identified as Bradyrhizobium japonicum BRC 2485. But no isolate was found to control disease progression effectively during in-vitro condition. To understand the biocontrol potential of B. japonicum BRC 2485, an in-vivo comparative study was conducted with one Bradyrhizobium type strain (MTCC 120) and one Bradyrhizobium reference strain (MCC 2940). The experimental evidence suggests that the priming of tomato plants with B. japonicum BRC 2485 limits the multiplication of R. solanacearum BR-001 therein. The Bradyrhizobium strains were tested for the production of siderophores, ethylene, and abscisic acid (ABA). All the experimental Bradyrhizobium strains were found to be negative for siderophore production and positive for ethylene production. However, only B. japonicum BRC 2485 was found to produce ABA, which plays a major role in triggering induced systemic resistance (ISR) in plants. To the best of authors’ knowledge, this is the first report of a strain of B. japonicum with activity against bacterial wilt disease. | ||
| 650 | 4 | |a Biocontrol | |
| 650 | 4 | |a Phytopathogens | |
| 650 | 4 | |a Competition | |
| 650 | 4 | |a Non-leguminous plant | |
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| 700 | 1 | |a Handique, Pratap J. |4 aut | |
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| 952 | |d 129 |j 2022 |e 4 |b 22 |c 04 |h 869-879 | ||