Abstract
Streptomyces can produce an overwhelming majority of known antibiotics and several biologically active compounds, but whether Streptomyces can display allelopathic effects on higher plants is largely unknown. In this study, seven actinomyces strains isolated from soils showed inhibitory effect on plant seedlings growth, among which, Streptomyces sp. 6803 had strong capability in inhibiting the seedlings growth of Brassica campestris and Echinochloa crusgalli in both solid and liquid cultures. The dilute solution (x 5) of fermented broth inhibited the seedlings growth of B. campestris and E. crusgalli by 60.7% and 61.3%, respectively. Based on the morphological and physiological-biochemical characteristics and 16S rRNA sequencing, Streptomyces sp. 6803 was identified as Streptomyces arenae, with the 16S rRNA sequence identity being 99.28%. Ultraviolet radiation and diethyl sulfate (DES) were used to produce mutants to enhance the allelopathic potential of this strain. After 80 and 100 seconds of ultraviolet radiation, the dilute solution (x10) of fermented broth of obtained mutants UV8024 and UV100-2 showed 37.5% and 38.1% higher inhibition effect on the root growth of B. campestris seedlings, respectively, compared with the control. The mutant D507 obtained through 1% DES treatment for 50 min showed 29.8% higher inhibition effect on the root growth of B. campestris seedlings. This study showed that Streptomyces sp. 6803 had allelopathic effect on higher plants, and it was possible to enhance the allelopathic potential of the strain via mutation breeding.
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Claims 9
Claim · model-written summary
Seven soil actinomyces strains inhibited plant seedling growth.
- Taxon
- plant seedlingse0
- Interactor
- actinomyces strains
Actinomycese0other - Outcome
- seedlings growthe0
- Direction
- inhibitory effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seven actinomyces strains isolated from soils showed inhibitory effect on plant seedlings growth”
Claim · model-written summary
Streptomyces sp. 6803 strongly inhibited Brassica campestris seedling growth in solid and liquid culture.
- Taxon
- Brassica campestris
.jpg?width=60)
Brassica rapa subsp. oleiferae0 - Treatment
- Streptomyces sp. 6803e0
- Interactor
- Streptomyces sp. 6803e0other
- Outcome
- seedlings growthe0
- Direction
- inhibitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Streptomyces sp. 6803 had strong capability in inhibiting the seedlings growth of Brassica campestris and Echinochloa crusgalli in both solid and liquid cultures”
Claim · model-written summary
Streptomyces sp. 6803 strongly inhibited Echinochloa crusgalli seedling growth in solid and liquid culture.
- Taxon
- Echinochloa crusgalli
Echinochloa crus-gallie0 - Treatment
- Streptomyces sp. 6803e0
- Interactor
- Streptomyces sp. 6803e0other
- Outcome
- seedlings growthe0
- Direction
- inhibitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Streptomyces sp. 6803 had strong capability in inhibiting the seedlings growth of Brassica campestris and Echinochloa crusgalli in both solid and liquid cultures”
Claim · model-written summary
Fivefold diluted fermented broth inhibited B. campestris seedling growth by 60.7%.
- Taxon
- B. campestrisBrassica rapa subsp. oleiferae0
- Treatment
- dilute solution (x 5) of fermented brothe0
- Outcome
- seedlings growthe0
- Direction
- inhibitede0
- Value
- 60.7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dilute solution (x 5) of fermented broth inhibited the seedlings growth of B. campestris and E. crusgalli by 60.7% and 61.3%, respectively”
Claim · model-written summary
Fivefold diluted fermented broth inhibited E. crusgalli seedling growth by 61.3%.
- Taxon
- E. crusgalliEchinochloa crus-gallie0
- Treatment
- dilute solution (x 5) of fermented brothe0
- Outcome
- seedlings growthe0
- Direction
- inhibitede0
- Value
- 61.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dilute solution (x 5) of fermented broth inhibited the seedlings growth of B. campestris and E. crusgalli by 60.7% and 61.3%, respectively”
Claim · model-written summary
Strain 6803 was identified as Streptomyces arenae with 99.28% 16S rRNA sequence identity.
- Taxon
- Brassica campestrisBrassica rapa subsp. oleiferae1
- Interactor
- Streptomyces sp. 6803e0other
- Outcome
- identified as Streptomyces arenaee0
- Value
- 99.28%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Streptomyces sp. 6803 was identified as Streptomyces arenae, with the 16S rRNA sequence identity being 99.28%”
e1“seedlings growth of Brassica campestris”
Claim · model-written summary
Mutant UV8024 broth had 37.5% higher inhibition of B. campestris root growth than control.
- Taxon
- B. campestrisBrassica rapa subsp. oleiferae0
- Treatment
- UV8024e0
- Outcome
- root growthe0
- Direction
- higher inhibitione0
- Value
- 37.5%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dilute solution (x10) of fermented broth of obtained mutants UV8024 and UV100-2 showed 37.5% and 38.1% higher inhibition effect on the root growth of B. campestris seedlings, respectively, compared with the control”
Claim · model-written summary
Mutant UV100-2 broth had 38.1% higher inhibition of B. campestris root growth than control.
- Taxon
- B. campestrisBrassica rapa subsp. oleiferae0
- Treatment
- UV100-2e0
- Outcome
- root growthe0
- Direction
- higher inhibitione0
- Value
- 38.1%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dilute solution (x10) of fermented broth of obtained mutants UV8024 and UV100-2 showed 37.5% and 38.1% higher inhibition effect on the root growth of B. campestris seedlings, respectively, compared with the control”
Claim · model-written summary
Mutant D507 broth had 29.8% higher inhibition of B. campestris root growth.
- Taxon
- B. campestrisBrassica rapa subsp. oleiferae0
- Treatment
- mutant D507e0
- Outcome
- root growthe0
- Direction
- higher inhibitione0
- Value
- 29.8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mutant D507 obtained through 1% DES treatment for 50 min showed 29.8% higher inhibition effect on the root growth of B. campestris seedlings”
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See all 15 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.