Abstract
Salt stress seriously affects plant growth and crop yield, and has become an important factor that threatens the soil quality worldwide. In recent years, the cultivation of salt-tolerant plants such as Sesbania rostrata has a positive effect on improving coastal saline-alkali land. Microbial inoculation and GABA addition have been shown to enhance the plant tolerance in response to the abiotic stresses, but studies in green manure crops and the revelation of related mechanisms are not clear. In this study, the effects of inoculation with Azorhizobium caulinodans ORS571 and exogenous addition of γ-Aminobutyric Acid (GABA; 200 mg·L −1 ) on the growth and development of S. rostrata under salt stress were investigated using potting experiments of vermiculite. The results showed that inoculation with ORS571 significantly increased the plant height, biomass, chlorophyll content, proline content (PRO), catalase (CAT) activity, and superoxide dismutase (SOD) activity of S. rostrata and reduced the malondialdehyde (MDA) level of leaves. The exogenous addition of GABA also increased the height, biomass, and CAT activity and reduced the MDA and PRO level of leaves. In addition, exogenous addition of GABA still had a certain improvement on the CAT activity and chlorophyll content of the ORS571- S. rostrata symbiotic system. In conclusion, ORS571 inoculation and GABA application have a positive effect on improving the salt stress tolerance in S. rostrata , which are closely associated with increasing chlorophyll synthesis and antioxidant enzyme activity and changing the amino acid content. Therefore, it can be used as a potential biological measure to improve the saline-alkali land.
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Claims 8
Claim · model-written summary
ORS571 inoculation increased plant height and biomass.
- Taxon
- S. rostrataSesbania rostratae1
- Treatment
- inoculation with ORS571e0
- Interactor
- ORS571e0symbiont
- Outcome
- plant height, biomasse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“inoculation with ORS571 significantly increased the plant height, biomass, chlorophyll content, proline content (PRO), catalase (CAT) activity, and superoxide dismutase (SOD) activity of S. rostrata”
e1“S. rostrata under salt stress”
Claim · model-written summary
ORS571 inoculation increased chlorophyll and proline content.
- Taxon
- S. rostrataSesbania rostratae1
- Treatment
- inoculation with ORS571e0
- Interactor
- ORS571e0symbiont
- Outcome
- chlorophyll content, proline content (PRO)e0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“inoculation with ORS571 significantly increased the plant height, biomass, chlorophyll content, proline content (PRO), catalase (CAT) activity, and superoxide dismutase (SOD) activity of S. rostrata”
e1“S. rostrata under salt stress”
Claim · model-written summary
ORS571 inoculation increased CAT and SOD activity.
- Taxon
- S. rostrataSesbania rostratae1
- Treatment
- inoculation with ORS571e0
- Interactor
- ORS571e0symbiont
- Outcome
- catalase (CAT) activity, and superoxide dismutase (SOD) activitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“inoculation with ORS571 significantly increased the plant height, biomass, chlorophyll content, proline content (PRO), catalase (CAT) activity, and superoxide dismutase (SOD) activity of S. rostrata”
e1“S. rostrata under salt stress”
Claim · model-written summary
ORS571 inoculation reduced leaf MDA.
- Taxon
- S. rostrataSesbania rostratae1
- Organ / stage
- leavese0
- Treatment
- ORS571e0
- Interactor
- ORS571e0symbiont
- Outcome
- malondialdehyde (MDA) levele0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“inoculation with ORS571 significantly increased the plant height, biomass, chlorophyll content, proline content (PRO), catalase (CAT) activity, and superoxide dismutase (SOD) activity of S. rostrata and reduced the malondialdehyde (MDA) level of leaves”
e1“S. rostrata under salt stress”
Claim · model-written summary
GABA addition increased height and biomass.
- Taxon
- S. rostrataSesbania rostratae1
- Treatment
- exogenous addition of GABAe0
- Outcome
- height, biomasse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“exogenous addition of GABA also increased the height, biomass, and CAT activity”
e1“S. rostrata under salt stress”
Claim · model-written summary
GABA addition increased CAT activity.
- Taxon
- S. rostrataSesbania rostratae1
- Treatment
- exogenous addition of GABAe0
- Outcome
- CAT activitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“exogenous addition of GABA also increased the height, biomass, and CAT activity”
e1“S. rostrata under salt stress”
Claim · model-written summary
GABA addition reduced leaf MDA and proline.
- Taxon
- S. rostrataSesbania rostratae1
- Organ / stage
- leavese0
- Treatment
- exogenous addition of GABAe0
- Outcome
- MDA and PRO levele0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“exogenous addition of GABA also increased the height, biomass, and CAT activity and reduced the MDA and PRO level of leaves”
e1“S. rostrata under salt stress”
Claim · model-written summary
GABA further improved CAT activity and chlorophyll in the ORS571 symbiosis.
- Taxon
- S. rostrataSesbania rostratae1
- Treatment
- exogenous addition of GABAe0
- Interactor
- ORS571e0symbiont
- Outcome
- CAT activity and chlorophyll contente0
- Direction
- improvemente0
Not reportedComparator
Verbatim
e0“exogenous addition of GABA still had a certain improvement on the CAT activity and chlorophyll content of the ORS571- S. rostrata symbiotic system”
e1“S. rostrata under salt stress”
The same questions in other papers
inoculation · growth · Sesbania rostrataResults agree
2 papers in the same direction as this paper
- positive
- positive
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.