Abstract
A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6 was characterized for production of acyl homoserine lactones (AHLs) as quorum sensing molecules. Mass spectrometry analysis of AHLs revealed the presence of C6-HSL, 3OH-C6-HSL, C8-HSL, C10-HSL, 3oxoC10-HSL, 3oxo-C12-HSL and 3OH-C12-HSL which are significantly different from those reported earlier in soybean symbionts. Purified AHL extracts significantly improved wheat and soybean seedling growth and root hair development along with increased soybean nodulation under axenic conditions. A positive correlation was observed among in vivo nitrogenase and catalase enzyme activities of the strain SR-6. Transmission electron microscopic analysis showed the cytochemical localization of catalase activity within the bacteroids, specifically attached to the peribacteroidal membrane. Root and nodule colonization proved rhizosphere competence of SR-6. The inoculation of SR-6 resulted in increased shoot length (13%), plant dry matter (50%), grain weight (16%), seed yield (20%) and N-uptake (14%) as compared to non-inoculated soybean plants. The symbiotic bacterium SR-6 has potential to improve soybean growth and yield in sub-humid climate of Azad Jammu and Kashmir region of Pakistan. The production and mass spectrometric profiling of AHLs as well as in vivo cytochemical localization of catalase enzyme activity in soybean Bradyrhizobium sp. have never been reported earlier elsewhere before our these investigations.
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Claims 13
Claim · model-written summary
Bradyrhizobium SR-6 contained seven detected acyl homoserine lactones differing significantly from earlier soybean symbiont reports.
- Taxon
- soybean
Glycine maxe1 - Interactor
- Bradyrhizobium sp. strain SR-6
Bradyrhizobium sp.e1symbiont - Outcome
- presence of C6-HSL, 3OH-C6-HSL, C8-HSL, C10-HSL, 3oxoC10-HSL, 3oxo-C12-HSL and 3OH-C12-HSLe0
- Comparator
- those reported earlier in soybean symbiontse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mass spectrometry analysis of AHLs revealed the presence of C6-HSL, 3OH-C6-HSL, C8-HSL, C10-HSL, 3oxoC10-HSL, 3oxo-C12-HSL and 3OH-C12-HSL which are significantly different from those reported earlier in soybean symbionts.”
e1“A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6”
Claim · model-written summary
Purified AHL extracts significantly improved wheat seedling growth and root hair development under axenic conditions.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Purified AHL extractse0
- Outcome
- seedling growth and root hair developmente0
- Direction
- improvede0
- Setting
- axenic conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Purified AHL extracts significantly improved wheat and soybean seedling growth and root hair development along with increased soybean nodulation under axenic conditions.”
Claim · model-written summary
Purified AHL extracts significantly improved soybean seedling growth and root hair development under axenic conditions.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Purified AHL extractse0
- Outcome
- seedling growth and root hair developmente0
- Direction
- improvede0
- Setting
- axenic conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Purified AHL extracts significantly improved wheat and soybean seedling growth and root hair development along with increased soybean nodulation under axenic conditions.”
Claim · model-written summary
Purified AHL extracts increased soybean nodulation under axenic conditions.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Purified AHL extractse0
- Outcome
- soybean nodulatione0
- Direction
- increasede0
- Setting
- axenic conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Purified AHL extracts significantly improved wheat and soybean seedling growth and root hair development along with increased soybean nodulation under axenic conditions.”
Claim · model-written summary
Nitrogenase and catalase enzyme activities in strain SR-6 were positively correlated.
- Taxon
- soybeanGlycine maxe1
- Interactor
- Bradyrhizobium sp. strain SR-6Bradyrhizobium sp.e1symbiont
- Gene
- nitrogenase and catalasee0
- Outcome
- enzyme activities of the strain SR-6e0
- Direction
- positive correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A positive correlation was observed among in vivo nitrogenase and catalase enzyme activities of the strain SR-6.”
e1“A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6”
Claim · model-written summary
Catalase activity was localized within bacteroids attached to the peribacteroidal membrane.
- Taxon
- soybeanGlycine maxe1
- Organ / stage
- peribacteroidal membranee0
- Interactor
- Bradyrhizobium sp. strain SR-6Bradyrhizobium sp.e1symbiont
- Gene
- catalasee0
- Outcome
- catalase activity within the bacteroidse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cytochemical localization of catalase activity within the bacteroids, specifically attached to the peribacteroidal membrane.”
e1“A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6”
Claim · model-written summary
Root and nodule colonization demonstrated rhizosphere competence of SR-6.
- Taxon
- soybeanGlycine maxe1
- Organ / stage
- Root and nodulee0
- Interactor
- Bradyrhizobium sp. strain SR-6Bradyrhizobium sp.e1symbiont
- Outcome
- rhizosphere competence of SR-6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root and nodule colonization proved rhizosphere competence of SR-6.”
e1“A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6”
Claim · model-written summary
SR-6 inoculation increased soybean shoot length by 13% versus non-inoculated plants.
- Taxon
- soybeanGlycine maxe0
- Treatment
- inoculation of SR-6e0
- Interactor
- Bradyrhizobium sp. strain SR-6Bradyrhizobium sp.e1symbiont
- Outcome
- shoot lengthe0
- Direction
- increasede0
- Value
- 13%e0
- Comparator
- non-inoculated soybean plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inoculation of SR-6 resulted in increased shoot length (13%), plant dry matter (50%), grain weight (16%), seed yield (20%) and N-uptake (14%) as compared to non-inoculated soybean plants.”
e1“A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6”
Claim · model-written summary
SR-6 inoculation increased soybean plant dry matter by 50%.
- Taxon
- soybeanGlycine maxe0
- Treatment
- inoculation of SR-6e0
- Interactor
- Bradyrhizobium sp. strain SR-6Bradyrhizobium sp.e1symbiont
- Outcome
- plant dry mattere0
- Direction
- increasede0
- Value
- 50%e0
- Comparator
- non-inoculated soybean plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inoculation of SR-6 resulted in increased shoot length (13%), plant dry matter (50%), grain weight (16%), seed yield (20%) and N-uptake (14%) as compared to non-inoculated soybean plants.”
e1“A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6”
Claim · model-written summary
SR-6 inoculation increased soybean grain weight by 16%.
- Taxon
- soybeanGlycine maxe0
- Treatment
- inoculation of SR-6e0
- Interactor
- Bradyrhizobium sp. strain SR-6Bradyrhizobium sp.e1symbiont
- Outcome
- grain weighte0
- Direction
- increasede0
- Value
- 16%e0
- Comparator
- non-inoculated soybean plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inoculation of SR-6 resulted in increased shoot length (13%), plant dry matter (50%), grain weight (16%), seed yield (20%) and N-uptake (14%) as compared to non-inoculated soybean plants.”
e1“A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6”
Claim · model-written summary
SR-6 inoculation increased soybean seed yield by 20%.
- Taxon
- soybeanGlycine maxe0
- Treatment
- inoculation of SR-6e0
- Interactor
- Bradyrhizobium sp. strain SR-6Bradyrhizobium sp.e1symbiont
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 20%e0
- Comparator
- non-inoculated soybean plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inoculation of SR-6 resulted in increased shoot length (13%), plant dry matter (50%), grain weight (16%), seed yield (20%) and N-uptake (14%) as compared to non-inoculated soybean plants.”
e1“A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6”
Claim · model-written summary
SR-6 inoculation increased soybean N-uptake by 14%.
- Taxon
- soybeanGlycine maxe0
- Treatment
- inoculation of SR-6e0
- Interactor
- Bradyrhizobium sp. strain SR-6Bradyrhizobium sp.e1symbiont
- Outcome
- N-uptakee0
- Direction
- increasede0
- Value
- 14%e0
- Comparator
- non-inoculated soybean plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inoculation of SR-6 resulted in increased shoot length (13%), plant dry matter (50%), grain weight (16%), seed yield (20%) and N-uptake (14%) as compared to non-inoculated soybean plants.”
e1“A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6”
Claim · model-written summary
The authors suggest SR-6 could improve soybean growth and yield in the named sub-humid region of Pakistan.
- Taxon
- soybeanGlycine maxe0
- Interactor
- Bradyrhizobium sp. strain SR-6Bradyrhizobium sp.e1symbiont
- Outcome
- improve soybean growth and yielde0
- Qualifier
- has potentiale0
- Setting
- Azad Jammu and Kashmir region of Pakistane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The symbiotic bacterium SR-6 has potential to improve soybean growth and yield in sub-humid climate of Azad Jammu and Kashmir region of Pakistan.”
e1“A soybean nodule endophytic bacterium Bradyrhizobium sp. strain SR-6”
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See all 435 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.