Abstract
Plant growth-promoting rhizobacteria (PGPR) affect plant growth through various mechanisms, such as indole-3-acetic acid (IAA) production, 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity, and biofilm formation. The aim of the study reported here was to isolate and characterize rhizobacteria that produce quorum-sensing signal molecules and other PGPR-related molecules. A biofilm-forming bacterium, GS2, was isolated from the rhizosphere of a sesame plant and subsequently found to produce two quorum-sensing signal molecules that were identified as N-hexanoyl-L-homoserine lactone (m/z 200) and N-octanoyl-L-homoserine lactone (m/z 228) by liquid chromatography–tandem mass spectrometry analysis. The strain was also found to produce IAA (17.2 μg mL−1), gibberellins (113.7 μg mL−1), and ACC deaminase (9.7 μM α-ketobutyrate mg−1 protein h−1). The strain was identified as Serratia glossinae based on a comparison of 16S rRNA gene sequences. Inoculation of the strain promoted growth of a gibberellin-deficient rice dwarf mutant (Waito-C). Different growth attributes, including shoot and root elongation, chlorophyll content, and plant weight could be attributed to the PGPR characteristics of strain GS2. These results suggest that S. glossinae strain GS2 can serve as a microbial agent that improves plant growth.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Biofilm-forming bacterium GS2 was isolated from a sesame plant rhizosphere.
- Taxon
- Serratia glossinae
Serratia fonticolae1 - Material
- GS2e0
- Interactor
- sesame
Sesamum indicume0host - Outcome
- A biofilm-forming bacteriume0
- Setting
- rhizospheree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A biofilm-forming bacterium, GS2, was isolated from the rhizosphere of a sesame plant”
e1“The strain was identified as Serratia glossinae based on a comparison of 16S rRNA gene sequences.”
Claim · model-written summary
GS2 produced the quorum-sensing molecule N-hexanoyl-L-homoserine lactone identified at m/z 200.
- Taxon
- Serratia glossinaeSerratia fonticolae1
- Material
- GS2e0
- Interactor
- sesameSesamum indicume0host
- Outcome
- N-hexanoyl-L-homoserine lactonee0
- Value
- m/z 200e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A biofilm-forming bacterium, GS2, was isolated from the rhizosphere of a sesame plant and subsequently found to produce two quorum-sensing signal molecules that were identified as N-hexanoyl-L-homoserine lactone (m/z 200) and N-octanoyl-L-homoserine lactone (m/z 228) by liquid chromatography–tandem mass spectrometry analysis.”
e1“The strain was identified as Serratia glossinae based on a comparison of 16S rRNA gene sequences.”
Claim · model-written summary
GS2 produced the quorum-sensing molecule N-octanoyl-L-homoserine lactone identified at m/z 228.
- Taxon
- Serratia glossinaeSerratia fonticolae1
- Material
- GS2e0
- Interactor
- sesameSesamum indicume0host
- Outcome
- N-octanoyl-L-homoserine lactonee0
- Value
- m/z 228e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A biofilm-forming bacterium, GS2, was isolated from the rhizosphere of a sesame plant and subsequently found to produce two quorum-sensing signal molecules that were identified as N-hexanoyl-L-homoserine lactone (m/z 200) and N-octanoyl-L-homoserine lactone (m/z 228) by liquid chromatography–tandem mass spectrometry analysis.”
e1“The strain was identified as Serratia glossinae based on a comparison of 16S rRNA gene sequences.”
Claim · model-written summary
Strain GS2 produced IAA at 17.2 μg mL−1.
- Taxon
- Serratia glossinaeSerratia fonticolae1
- Material
- GS2t0
- Outcome
- IAAe0
- Value
- 17.2 μg mL−1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The strain was also found to produce IAA (17.2 μg mL−1), gibberellins (113.7 μg mL−1), and ACC deaminase (9.7 μM α-ketobutyrate mg−1 protein h−1).”
e1“The strain was identified as Serratia glossinae based on a comparison of 16S rRNA gene sequences.”
t0“Serratia glossinae GS2”
Claim · model-written summary
Strain GS2 produced gibberellins at 113.7 μg mL−1.
- Taxon
- Serratia glossinaeSerratia fonticolat0
- Material
- GS2t0
- Outcome
- gibberellinse0
- Value
- 113.7 μg mL−1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The strain was also found to produce IAA (17.2 μg mL−1), gibberellins (113.7 μg mL−1), and ACC deaminase (9.7 μM α-ketobutyrate mg−1 protein h−1).”
t0“Serratia glossinae GS2”
Claim · model-written summary
Strain GS2 had ACC deaminase activity of 9.7 μM α-ketobutyrate mg−1 protein h−1.
- Taxon
- Serratia glossinaeSerratia fonticolat0
- Material
- GS2t0
- Gene
- ACC deaminasee0
- Outcome
- ACC deaminasee0
- Value
- 9.7 μM α-ketobutyrate mg−1 protein h−1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The strain was also found to produce IAA (17.2 μg mL−1), gibberellins (113.7 μg mL−1), and ACC deaminase (9.7 μM α-ketobutyrate mg−1 protein h−1).”
t0“Serratia glossinae GS2”
Claim · model-written summary
Strain GS2 was identified as Serratia glossinae using 16S rRNA gene sequence comparison.
- Taxon
- Serratia glossinaeSerratia fonticolae0
- Material
- GS2t0
- Outcome
- identified as Serratia glossinaee0
- Qualifier
- based on a comparison of 16S rRNA gene sequencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The strain was identified as Serratia glossinae based on a comparison of 16S rRNA gene sequences.”
t0“Serratia glossinae GS2”
Claim · model-written summary
Inoculation with strain GS2 promoted growth of gibberellin-deficient rice dwarf mutant Waito-C.
- Taxon
- rice
Oryza sativae0 - Material
- Waito-Ce0
- Treatment
- Inoculation of the straine0
- Interactor
- Serratia glossinae GS2Serratia fonticolat0symbiont
- Outcome
- growthe0
- Direction
- promotede0
- Qualifier
- gibberellin-deficient rice dwarf mutante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of the strain promoted growth of a gibberellin-deficient rice dwarf mutant (Waito-C).”
t0“Serratia glossinae GS2”
Claim · model-written summary
The authors attribute rice shoot and root elongation to the PGPR characteristics of strain GS2.
- Taxon
- riceOryza sativae1
- Material
- Waito-Ce1
- Interactor
- strain GS2e0symbiont
- Outcome
- shoot and root elongatione0
- Qualifier
- could be attributed to the PGPR characteristics of strain GS2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Different growth attributes, including shoot and root elongation, chlorophyll content, and plant weight could be attributed to the PGPR characteristics of strain GS2.”
e1“Inoculation of the strain promoted growth of a gibberellin-deficient rice dwarf mutant (Waito-C).”
Claim · model-written summary
The authors attribute rice chlorophyll content and plant weight to the PGPR characteristics of strain GS2.
- Taxon
- riceOryza sativae1
- Material
- Waito-Ce1
- Interactor
- strain GS2e0symbiont
- Outcome
- chlorophyll content, and plant weighte0
- Qualifier
- could be attributed to the PGPR characteristics of strain GS2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Different growth attributes, including shoot and root elongation, chlorophyll content, and plant weight could be attributed to the PGPR characteristics of strain GS2.”
e1“Inoculation of the strain promoted growth of a gibberellin-deficient rice dwarf mutant (Waito-C).”
Claim · model-written summary
The authors suggest S. glossinae strain GS2 can serve as a microbial agent to improve plant growth.
- Taxon
- S. glossinaeSerratia fonticolae0
- Material
- strain GS2e0
- Outcome
- can serve as a microbial agent that improves plant growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggest that S. glossinae strain GS2 can serve as a microbial agent that improves plant growth.”