Abstract
Streptomyces can produce secondary metabolites with a wide range of activities and is often used in agriculture as a biocontrol strain to control soil-borne diseases. Screening and isolation from infected soil is an effective method to obtain active strains. In this study, the best antagonistic inter-root growth-promoting bacteria were isolated from grapevine inter-root soil samples, and strain F2 was identified as Streptomyces sp. based on morphological, physiological, and biochemical characteristics as well as 16S rDNA sequencing results. The results showed that the fermentation broth/liquid and sterile filtrate of strain F2 exhibited antagonistic effects against 10 plant pathogens, with an inhibition rate reaching up to 80%. Notably, two of them exhibited remarkable inhibitory effects against Phytophthora capsici with inhibition rates of 80.58% and 87.71%, respectively. The P. capsici leaf control experiment revealed that the control effect of strain F2 fermentation liquid on P. capsici filaments was 61.09%. Furthermore, indoor pot experiments demonstrated that the fermentation liquid of strain F2 had a significant inhibitory effect on pepper blight, with a maximum inhibition of 83.31%. Antagonistic factor analysis indicated that strain F2 had specific organophosphorus hydrolysis, nitrogen fixation, extracellular protease secretion, and IAA production capabilities. Additionally, root treatment with strain F2’s fermentation liquid significantly enhanced capsicum growth. Taking together, Streptomyces F2 not only exhibits a wide-spectrum antagonistic effect against plant pathogens but also promotes plant growth, which suggests that Streptomyces F2 can be used as an effective biological control resource and provides important theoretical support for the application of Streptomyces F2.
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Claims 8
Claim · model-written summary
Strain F2 was identified as Streptomyces sp.
- Interactor
- Streptomyces sp.
Streptomyces sp.e0biocontrol_agent - Outcome
- identified as Streptomyces sp.e0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strain F2 was identified as Streptomyces sp.”
e1“grapevine inter-root soil samples”
Claim · model-written summary
Strain F2 broth inhibited ten plant pathogens by up to 80%.
- Interactor
- plant pathogense0pathogen
- Outcome
- inhibition ratee0
- Direction
- antagonistic effectse0
- Value
- 80%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fermentation broth/liquid and sterile filtrate of strain F2 exhibited antagonistic effects against 10 plant pathogens, with an inhibition rate reaching up to 80%.”
e1“grapevine inter-root soil samples”
Claim · model-written summary
F2 fermentation broth inhibited Phytophthora capsici by 80.58%.
- Interactor
- Phytophthora capsici
.jpg?width=60)
Phytophthora capsicie0pathogen - Outcome
- inhibition ratese0
- Direction
- inhibitorye0
- Value
- 80.58%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“two of them exhibited remarkable inhibitory effects against Phytophthora capsici with inhibition rates of 80.58% and 87.71%, respectively.”
e1“grapevine inter-root soil samples”
Claim · model-written summary
F2 sterile filtrate inhibited Phytophthora capsici by 87.71%.
- Interactor
- Phytophthora capsiciPhytophthora capsicie0pathogen
- Outcome
- inhibition ratese0
- Direction
- inhibitorye0
- Value
- 87.71%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two of them exhibited remarkable inhibitory effects against Phytophthora capsici with inhibition rates of 80.58% and 87.71%, respectively.”
e1“grapevine inter-root soil samples”
Claim · model-written summary
F2 fermentation liquid controlled P. capsici filaments by 61.09% in a leaf assay.
- Taxon
- peppere2
- Treatment
- strain F2 fermentation liquide0
- Interactor
- P. capsiciPhytophthora capsicie0pathogen
- Outcome
- control effecte0
- Value
- 61.09%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the control effect of strain F2 fermentation liquid on P. capsici filaments was 61.09%.”
e1“P. capsici leaf control experiment”
e2“pepper blight”
Claim · model-written summary
F2 fermentation liquid inhibited pepper blight by up to 83.31%.
- Taxon
- peppere0
- Treatment
- fermentation liquid of strain F2e0
- Outcome
- pepper blighte0
- Direction
- inhibitorye0
- Value
- 83.31%e0
- Setting
- indoor pot experimentse1
Not reportedComparator
Verbatim
e0“the fermentation liquid of strain F2 had a significant inhibitory effect on pepper blight, with a maximum inhibition of 83.31%.”
e1“indoor pot experiments”
Claim · model-written summary
Strain F2 showed organophosphorus hydrolysis, nitrogen fixation, protease secretion and IAA production capabilities.
- Interactor
- strain F2e0biocontrol_agent
- Outcome
- organophosphorus hydrolysis, nitrogen fixation, extracellular protease secretion, and IAA production capabilitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strain F2 had specific organophosphorus hydrolysis, nitrogen fixation, extracellular protease secretion, and IAA production capabilities.”
e1“grapevine inter-root soil samples”
Claim · model-written summary
Root treatment with F2 fermentation liquid significantly enhanced capsicum growth.
- Treatment
- root treatment with strain F2’s fermentation liquide0
- Interactor
- strain F2e0biocontrol_agent
- Outcome
- capsicum growthe0
- Direction
- enhancede0
CapsicumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root treatment with strain F2’s fermentation liquid significantly enhanced capsicum growth.”
The same questions in other papers
processing · growth · Capsicum (peppers)Positive and negative results
9 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
7 papers more in this group
See all 11 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.