Abstract
In the present study, plant growth promoting rhizobacterial (PGPR) strains Pseudomonas fluorescence strain P2, Pseudomonas jessenii R62, Pseudomonas synxantha R81, Bacillus cereus BSB 38 (14B), Arthrobacter nitroguajacolicus strainYB3 and strain YB5 were tested for their role in enhancing plant growth and induction of stress related enzymes in Sahbhagi (drought tolerance) and IR-64 (drought sensitive) cultivars of rice (Oryza sativa L.) under different level of drought stress. PGPRs, P. jessenii, R62, P. synxantha, R81 were used as one consortium similarly A. nitroguajacolicus strainYB3 and strain YB5 were used as other consortia. Most of the PGPR inoculated plants showed enhanced growth as compared to uninoculated plants under all the level of drought stress. Quantitative analyses of antioxidant enzymes indicated that majority of the PGPRs inoculated plants in both varieties showed higher proline content, higher activity of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX) and lower level of hydrogen peroxide (H2O2), malondialdehyde (MDA) in leaves at all the level of drought stress. The study suggests that PGPRs alleviates oxidative damage in rice plants grown under drought by improving plant growth and activating antioxidant defense systems, thereby improving stability of membranes in plant cells. This study provides evidence for a beneficial effect of PGPRs application in enhancing drought tolerance of rice under water deficit conditions. Key words: Plant growth promoting rhizobacterial (PGPR), plant growth promotion, drought stress, antioxidant, rice.
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Claims 7
Claim · model-written summary
Most PGPR inoculated rice showed enhanced growth under all drought levels.
- Taxon
- rice (Oryza sativa L.)
Oryza sativae1 - Treatment
- PGPR inoculatede0
- Interactor
- PGPRe2symbiont
- Outcome
- growthe0
- Direction
- enhancede0
- Qualifier
- all the level of drought stresse0
- Comparator
- uninoculated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most of the PGPR inoculated plants showed enhanced growth as compared to uninoculated plants under all the level of drought stress.”
e1“cultivars of rice (Oryza sativa L.) under different level of drought stress.”
e2“plant growth promoting rhizobacterial (PGPR) strains”
Claim · model-written summary
Most inoculated plants had higher proline content under drought.
- Taxon
- rice (Oryza sativa L.)Oryza sativae1
- Treatment
- PGPRs inoculatede0
- Interactor
- PGPRe2symbiont
- Outcome
- proline contente0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“majority of the PGPRs inoculated plants in both varieties showed higher proline content”
e1“cultivars of rice (Oryza sativa L.)”
e2“plant growth promoting rhizobacterial (PGPR) strains”
Claim · model-written summary
Most inoculated plants had higher SOD, CAT and POD activity under drought.
- Taxon
- rice (Oryza sativa L.)Oryza sativae2
- Treatment
- PGPRs inoculatede1
- Interactor
- PGPRe3symbiont
- Outcome
- activity of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD)e0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher activity of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX)”
e1“majority of the PGPRs inoculated plants in both varieties showed”
e2“cultivars of rice (Oryza sativa L.)”
e3“plant growth promoting rhizobacterial (PGPR) strains”
Claim · model-written summary
Most inoculated plants had higher APX activity under drought.
- Taxon
- rice (Oryza sativa L.)Oryza sativae2
- Treatment
- PGPRs inoculatede1
- Interactor
- PGPRe3symbiont
- Outcome
- ascorbate peroxidase (APX)e0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher activity of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX)”
e1“majority of the PGPRs inoculated plants in both varieties showed”
e2“cultivars of rice (Oryza sativa L.)”
e3“plant growth promoting rhizobacterial (PGPR) strains”
Claim · model-written summary
Most inoculated plants had lower leaf hydrogen peroxide and MDA under drought.
- Taxon
- rice (Oryza sativa L.)Oryza sativae2
- Organ / stage
- leavese0
- Treatment
- PGPRs inoculatede1
- Interactor
- PGPRe3symbiont
- Outcome
- level of hydrogen peroxide (H2O2), malondialdehyde (MDA)e0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower level of hydrogen peroxide (H2O2), malondialdehyde (MDA) in leaves at all the level of drought stress.”
e1“majority of the PGPRs inoculated plants in both varieties showed”
e2“cultivars of rice (Oryza sativa L.)”
e3“plant growth promoting rhizobacterial (PGPR) strains”
Claim · model-written summary
PGPRs were interpreted as alleviating oxidative damage by promoting growth and antioxidant defense, improving membrane stability.
- Taxon
- riceOryza sativae0
- Interactor
- PGPRse0symbiont
- Outcome
- oxidative damagee0
- Direction
- alleviatese0
- Qualifier
- activating antioxidant defense systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PGPRs alleviates oxidative damage in rice plants grown under drought by improving plant growth and activating antioxidant defense systems, thereby improving stability of membranes in plant cells.”
Claim · model-written summary
PGPR application was interpreted as enhancing rice drought tolerance.
- Taxon
- riceOryza sativae0
- Treatment
- PGPRs applicatione0
- Interactor
- PGPRse0symbiont
- Outcome
- drought tolerancee0
- Direction
- enhancinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“beneficial effect of PGPRs application in enhancing drought tolerance of rice under water deficit conditions.”
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