Abstract
Salinity is one of the most important factors restricting vegetative production, especially in arid and semi-arid regions. In this study,the effects of the exogenous plant growth-promoting rhizobacteria (PGPR: Bacillus pumilus UG-41, Bacillus cereus UG-50) application on seedling growth, concentration of plant nutrient elements, antioxidant activity and chlorophyll, proline, sugar, hydrogen peroxide (H2O2), malondialdehyde (MDA), hormone contents of pepper seedlings under salinity stress conditions (100 mM NaCl) were investigated. Our results showed that gibberellic acid (GA), salicylic acid (SA), indole acetic acid (IAA), leaf relative water content (LRWC) and the concentration of all plant tissue nutrients investigated except for Na were decreased by salt stress. On the other hand, PGPR treatment increased the plant growth parameters by increasing the proline, sucrose, hormone and chlorophyll contents; altering the mineral uptake and increasing the antioxidant enzyme activity in pepper seedlings under salt stress. In conclusion, PGPR treatment may be used as an effective technique to protect the plants against salinity stress since the bacteria positively impact the ability of the plant to cope with the stress by particularly increasing the antioxidant enzyme activity, hormone level and mineral uptake.
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Claims 7
Claim · model-written summary
Salt stress decreased GA, SA and IAA contents in pepper seedlings.
- Taxon
- Capsicum annuum L.
Capsicum annuumt0 - Treatment
- salt stresse0
- Outcome
- gibberellic acid (GA), salicylic acid (SA), indole acetic acid (IAA)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“gibberellic acid (GA), salicylic acid (SA), indole acetic acid (IAA), leaf relative water content (LRWC) and the concentration of all plant tissue nutrients investigated except for Na were decreased by salt stress.”
t0“Capsicum annuum L.”
Claim · model-written summary
Salt stress decreased pepper leaf relative water content.
- Taxon
- Capsicum annuum L.Capsicum annuumt0
- Treatment
- salt stresse0
- Outcome
- leaf relative water content (LRWC)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf relative water content (LRWC) and the concentration of all plant tissue nutrients investigated except for Na were decreased by salt stress.”
t0“Capsicum annuum L.”
Claim · model-written summary
Salt stress decreased investigated tissue nutrients except sodium.
- Taxon
- Capsicum annuum L.Capsicum annuumt0
- Treatment
- salt stresse0
- Outcome
- concentration of all plant tissue nutrients investigated except for Nae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the concentration of all plant tissue nutrients investigated except for Na were decreased by salt stress.”
t0“Capsicum annuum L.”
Claim · model-written summary
PGPR treatment increased pepper seedling growth under salinity.
- Taxon
- Capsicum annuum L.Capsicum annuumt0
- Treatment
- PGPR treatmente0
- Outcome
- plant growth parameterse0
- Direction
- increasede0
- Qualifier
- under salt stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PGPR treatment increased the plant growth parameters by increasing the proline, sucrose, hormone and chlorophyll contents; altering the mineral uptake and increasing the antioxidant enzyme activity in pepper seedlings under salt stress.”
t0“Capsicum annuum L.”
Claim · model-written summary
PGPR increased proline, sucrose and hormone contents under salt stress.
- Taxon
- Capsicum annuum L.Capsicum annuumt0
- Treatment
- PGPR treatmente0
- Outcome
- proline, sucrose, hormone and chlorophyll contentse0
- Direction
- increasinge0
- Qualifier
- under salt stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PGPR treatment increased the plant growth parameters by increasing the proline, sucrose, hormone and chlorophyll contents; altering the mineral uptake and increasing the antioxidant enzyme activity in pepper seedlings under salt stress.”
t0“Capsicum annuum L.”
Claim · model-written summary
PGPR altered mineral uptake under salt stress.
- Taxon
- Capsicum annuum L.Capsicum annuumt0
- Treatment
- PGPR treatmente1
- Outcome
- mineral uptakee0
- Qualifier
- under salt stresse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“altering the mineral uptake and increasing the antioxidant enzyme activity in pepper seedlings under salt stress.”
e1“PGPR treatment increased the plant growth parameters”
t0“Capsicum annuum L.”
Claim · model-written summary
PGPR increased antioxidant enzyme activity under salt stress.
- Taxon
- Capsicum annuum L.Capsicum annuumt0
- Treatment
- PGPR treatmente1
- Outcome
- antioxidant enzyme activitye0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the antioxidant enzyme activity in pepper seedlings under salt stress.”
e1“PGPR treatment increased the plant growth parameters”
t0“Capsicum annuum L.”
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See all 13 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.