Abstract
Viral plant diseases represent a serious problem in agricultural production, causing large shortages in the production of food crops. Eco-friendly approaches are used in controlling viral plant infections, such as biocontrol agents. In the current study, Streptomyces cellulosae isolate Actino 48 is tested as a biocontrol agent for the management of tobacco mosaic virus (TMV) and inducing tomato plant systemic resistance under greenhouse conditions. Foliar application of a cell pellet suspension of Actino 48 (2 × 107 cfu. mL−1) is performed at 48 h before inoculation with TMV. Peroxidase activity, chitinase activity, protein content, and the total phenolic compounds are measured in tomato leaves at 21 dpi. On the other hand, the TMV accumulation level and the transcriptional changes of five tomato defense-related genes (PAL, PR-1, CHS, PR-3, and PR-2) are studied. Treatment with Actino 48 before TMV inoculation (48 h) induced tomato plants to increase their levels of peroxidase and chitinase enzymes. Furthermore, a significant increase in the concentration of total phenolic compounds was observed in Actino 48 and TMV-treated tomato plants compared to TMV-treated tomato plants alone. Treatment with Actino 48 reduced the TMV accumulation level (53.8%) compared to treatment with the virus alone. Actino 48 induced plant growth, where the fresh and dry weights of tomato plants increased. Additionally, significant increases of the PAL, PR-1, CHS, and PR-3 transcripts were observed. On the other hand, a higher induction of PR-2 was only observed in TMV-treated tomato plants. In conclusion, S. cellulosae isolate Actino 48 can be used as a biocontrol agent for the reduction of symptoms and severity of TMV.
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Claims 8
Claim · model-written summary
Actino 48 before TMV increased tomato peroxidase and chitinase enzyme levels.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- Treatment with Actino 48 before TMV inoculation (48 h)e0
- Interactor
- TMV
Tobacco mosaic viruse0pathogen - Second interactor
- Actino 48e0biocontrol_agent
- Outcome
- peroxidase and chitinase enzymese0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with Actino 48 before TMV inoculation (48 h) induced tomato plants to increase their levels of peroxidase and chitinase enzymes.”
Claim · model-written summary
Actino 48 plus TMV increased total phenolic compounds relative to TMV alone.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Actino 48 and TMV-treatede0
- Interactor
- TMVTobacco mosaic viruse0pathogen
- Second interactor
- Actino 48e0biocontrol_agent
- Outcome
- concentration of total phenolic compoundse0
- Direction
- increasee0
- Comparator
- TMV-treated tomato plants alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant increase in the concentration of total phenolic compounds was observed in Actino 48 and TMV-treated tomato plants compared to TMV-treated tomato plants alone.”
Claim · model-written summary
Actino 48 reduced TMV accumulation by 53.8% relative to virus alone.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- Treatment with Actino 48e0
- Interactor
- TMVTobacco mosaic viruse0pathogen
- Second interactor
- Actino 48e0biocontrol_agent
- Outcome
- TMV accumulation levele0
- Direction
- reducede0
- Value
- 53.8%e0
- Comparator
- treatment with the virus alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with Actino 48 reduced the TMV accumulation level (53.8%) compared to treatment with the virus alone.”
e1“inducing tomato plant systemic resistance”
Claim · model-written summary
Actino 48 increased tomato fresh and dry weights.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Actino 48e0
- Interactor
- Actino 48e0biocontrol_agent
- Outcome
- fresh and dry weightse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Actino 48 induced plant growth, where the fresh and dry weights of tomato plants increased.”
Claim · model-written summary
Actino 48 significantly increased PAL, PR-1 and CHS transcripts.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- PAL, PR-1, CHSe0
- Direction
- increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant increases of the PAL, PR-1, CHS, and PR-3 transcripts were observed.”
e1“five tomato defense-related genes”
Claim · model-written summary
Actino 48 significantly increased PR-3 transcripts.
- Taxon
- tomatoSolanum lycopersicume1
- Gene
- PR-3e0
- Outcome
- PR-3 transcriptse0
- Direction
- increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant increases of the PAL, PR-1, CHS, and PR-3 transcripts were observed.”
e1“five tomato defense-related genes”
Claim · model-written summary
PR-2 induction was higher only in TMV-treated tomato plants.
- Taxon
- tomatoSolanum lycopersicume0
- Interactor
- TMVTobacco mosaic viruse0pathogen
- Gene
- PR-2e0
- Outcome
- induction of PR-2e0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a higher induction of PR-2 was only observed in TMV-treated tomato plants.”
Claim · model-written summary
The authors propose Actino 48 for reducing TMV symptoms and severity.
- Taxon
- tomatoSolanum lycopersicume1
- Interactor
- TMVTobacco mosaic viruse0pathogen
- Second interactor
- S. cellulosae isolate Actino 48Streptomyces cellulosaee0biocontrol_agent
- Outcome
- reduction of symptoms and severity of TMVe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S. cellulosae isolate Actino 48 can be used as a biocontrol agent for the reduction of symptoms and severity of TMV.”
e1“inducing tomato plant systemic resistance”
The same questions in other papers
Nicotiana tabacum · Tobacco mosaic virus · Solanum lycopersicum (tomato)Positive and negative results
8 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
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See all 16 papers →inoculation · Tobacco mosaic virus · Solanum lycopersicum (tomato)Positive and negative results
9 papers in the same direction as this paper · 4 in the opposite direction
- positive
- negative
- no effect
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See all 14 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.