Abstract
A total of 40 actinomycetes isolated from rhizosphere soils of Ononis angustissima Lam. were in vitro tested for their antagonism against deferent pathogenic microorganisms by streak assay. Among the isolates, four (21, 2A26, 1B10 and 2C34) present a potent antagonism against both pathogenic bacteria and fungi, they were selected, identified by 16S rDNA sequence analysis and phenotypic properties, and tested for their antimicrobial activity as well as their biocontrol potential against Chickpea (Cicer arietinum L.) pathogenic fungus (Fusarium oxysporum). Cultural characteristic studies strongly suggested that these strains belong to the genus Streptomyces. The four Streptomyces sp., solubilize phosphate and produce extracellular fungal cell-wall degrading enzymes chitinase and protease, as well as a marked production of acid-β-indole acetic (AIA). The nucleotide sequence of the 16S rRNA gene of Streptomyces sp. strains 21, 2A26, 1B10 and 2C34 exhibited close similarity (62-75%) with Streptomyces parvulus MARS 16S rRNA genes. The inhibition was higher against fungi and Gram+ bacteria, while Gram- bacteria were less inhibited. The growth of the plant pathogenic fungus Fusarium oxysporum was considerably inhibited in the presence of the strains 21, 2A26, 1B10 and 2C34 culture supernatant. These studies revealed that the presence of the Streptomyces strains in the soil significantly promoted the growth of the Chickpea plants. These results indicate that the Streptomyces strains isolated for rhizosphere from Ononis angustissima Lam. growing in arid conditions in southern Algeria (Sahara) could be an interesting source for antimicrobial bioactive substances and as biocontrol agents.
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Claims 9
Claim · model-written summary
Four Streptomyces isolates showed potent in vitro antagonism against pathogenic bacteria and fungi.
- Taxon
- Chickpea (Cicer arietinum L.)
Cicer arietinume1 - Interactor
- pathogenic bacteria and fungie0pathogen
- Second interactor
- Streptomyces sp.
Streptomyces sp.t0biocontrol_agent - Outcome
- antagonisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF STREPTOMYCES SP. ISOLATED FROM THE RHIZOSPHERE OF ONONIS ANGUSTISSIMA LAM”
e0“Among the isolates, four (21, 2A26, 1B10 and 2C34) present a potent antagonism against both pathogenic bacteria and fungi”
e1“tested for their antimicrobial activity as well as their biocontrol potential against Chickpea (Cicer arietinum L.) pathogenic fungus (Fusarium oxysporum)”
Claim · model-written summary
Culture supernatant of the four Streptomyces strains considerably inhibited growth of Fusarium oxysporum.
- Taxon
- Chickpea (Cicer arietinum L.)Cicer arietinume1
- Treatment
- culture supernatante2
- Interactor
- Fusarium oxysporum
_(Fusarium_oxysporum_f.sp._batatas)_1234227-PPT-Clemson_University.jpg?width=60)
Fusarium oxysporume2pathogen - Second interactor
- strains 21, 2A26, 1B10 and 2C34e2biocontrol_agent
- Outcome
- growth of the plant pathogenic fungus Fusarium oxysporume2
- Direction
- inhibitede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_(Fusarium_oxysporum_f.sp._batatas)_1234227-PPT-Clemson_University.jpg?width=500)
Verbatim
e1“tested for their antimicrobial activity as well as their biocontrol potential against Chickpea (Cicer arietinum L.) pathogenic fungus (Fusarium oxysporum)”
e2“The growth of the plant pathogenic fungus Fusarium oxysporum was considerably inhibited in the presence of the strains 21, 2A26, 1B10 and 2C34 culture supernatant”
Claim · model-written summary
Presence of the Streptomyces strains in soil significantly promoted growth of chickpea plants.
- Taxon
- ChickpeaCicer arietinume3
- Treatment
- presence of the Streptomyces strains in the soile3
- Interactor
- Streptomyces strainse3symbiont
- Outcome
- growth of the Chickpea plantse3
- Direction
- promotede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“These studies revealed that the presence of the Streptomyces strains in the soil significantly promoted the growth of the Chickpea plants”
Claim · model-written summary
Inhibition by the Streptomyces isolates was higher against fungi and Gram-positive bacteria than against Gram-negative bacteria.
- Taxon
- Chickpea (Cicer arietinum L.)Cicer arietinume1
- Interactor
- fungi and Gram+ bacteriae4pathogen
- Outcome
- inhibitione4
- Direction
- highere4
- Comparator
- Gram- bacteriae4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“tested for their antimicrobial activity as well as their biocontrol potential against Chickpea (Cicer arietinum L.) pathogenic fungus (Fusarium oxysporum)”
e4“The inhibition was higher against fungi and Gram+ bacteria, while Gram- bacteria were less inhibited”
Claim · model-written summary
The four Streptomyces isolates solubilised phosphate.
- Taxon
- Ononis angustissima
Ononis angustissimat0 - Outcome
- solubilize phosphatee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF STREPTOMYCES SP. ISOLATED FROM THE RHIZOSPHERE OF ONONIS ANGUSTISSIMA LAM”
e5“The four Streptomyces sp., solubilize phosphate and produce extracellular fungal cell-wall degrading enzymes chitinase and protease, as well as a marked production of acid-β-indole acetic (AIA)”
Claim · model-written summary
The four Streptomyces isolates produced extracellular chitinase and protease.
- Taxon
- Ononis angustissimaOnonis angustissimat0
- Outcome
- produce extracellular fungal cell-wall degrading enzymes chitinase and proteasee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF STREPTOMYCES SP. ISOLATED FROM THE RHIZOSPHERE OF ONONIS ANGUSTISSIMA LAM”
e5“The four Streptomyces sp., solubilize phosphate and produce extracellular fungal cell-wall degrading enzymes chitinase and protease, as well as a marked production of acid-β-indole acetic (AIA)”
Claim · model-written summary
The four Streptomyces isolates produced a marked amount of acid-β-indole acetic (AIA).
- Taxon
- Ononis angustissimaOnonis angustissimat0
- Outcome
- marked production of acid-β-indole acetic (AIA)e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF STREPTOMYCES SP. ISOLATED FROM THE RHIZOSPHERE OF ONONIS ANGUSTISSIMA LAM”
e5“The four Streptomyces sp., solubilize phosphate and produce extracellular fungal cell-wall degrading enzymes chitinase and protease, as well as a marked production of acid-β-indole acetic (AIA)”
Claim · model-written summary
The 16S rRNA gene sequences of the isolates showed 62-75% similarity to Streptomyces parvulus.
- Taxon
- Ononis angustissimaOnonis angustissimat0
- Outcome
- close similaritye6
- Value
- 62-75%e6
- Comparator
- Streptomyces parvulus MARS 16S rRNA genese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF STREPTOMYCES SP. ISOLATED FROM THE RHIZOSPHERE OF ONONIS ANGUSTISSIMA LAM”
e6“The nucleotide sequence of the 16S rRNA gene of Streptomyces sp. strains 21, 2A26, 1B10 and 2C34 exhibited close similarity (62-75%) with Streptomyces parvulus MARS 16S rRNA genes”
Claim · model-written summary
Cultural characteristics suggested that the isolates belong to the genus Streptomyces.
- Taxon
- Ononis angustissimaOnonis angustissimat0
- Outcome
- belong to the genus Streptomycese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“OF STREPTOMYCES SP. ISOLATED FROM THE RHIZOSPHERE OF ONONIS ANGUSTISSIMA LAM”
e7“Cultural characteristic studies strongly suggested that these strains belong to the genus Streptomyces”
The same questions in other papers
Streptomyces · growth · Cicer arietinum (chickpea)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.