Abstract
Salt stresses collectively are responsible for many crop losses worldwide especially salt -sensitive plants. The present study investigates the roles of exogenous application of glycinebetaine (GB, 5mM) in improving salt stress tolerance in salt sensitive green bean seedlings. Salt stresses (45mM NaCl for one week) significantly reduced leaf relative water (RWC) and chlorophyll (chl) content and increased percentage of electrolyte leakage, endogenous Proline and lipid peroxidation. Activities of peroxidase(PX), ascorbate peroxidae (APX), superoxide dismutase (SOD), and catalase (CAT), were significantly increased in shoots and roots of green bean seedlings subjected to salt stress. Exogenous application of GB improves salt tolerance of green been seedlings as shown by increased RWC and chlorophyll contents in leaves and reduced percentage of electrolyte leakage, lipid peroxidation and proline content. Under salinity stress condition, GB application decreased the activities of PX, CAT, APX and SOD in seedling shoots, whereas, it increased the activities of CAT and AP in roots. The result suggests that exogenous application of GB increased green bean seedlings' tolerance to salt-induced oxidative damage by upregulating their antioxidant defense system where this compatible solute protect plant cell against salinity stress.
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Claims 8
Claim · model-written summary
Salt stress reduced leaf relative water content and chlorophyll.
- Taxon
- green beant0
- Treatment
- Salt stresses (45mM NaCl for one week)e0
- Outcome
- leaf relative water (RWC) and chlorophyll (chl) contente0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Salt stresses (45mM NaCl for one week) significantly reduced leaf relative water (RWC) and chlorophyll (chl) content and increased percentage of electrolyte leakage, endogenous Proline and lipid peroxidation.”
t0“GREEN BEAN (PHASEOLUS VULGARIS) SEEDLINGS”
Claim · model-written summary
Salt stress increased electrolyte leakage, proline and lipid peroxidation.
- Taxon
- green beant0
- Treatment
- Salt stresses (45mM NaCl for one week)e0
- Outcome
- percentage of electrolyte leakage, endogenous Proline and lipid peroxidatione0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Salt stresses (45mM NaCl for one week) significantly reduced leaf relative water (RWC) and chlorophyll (chl) content and increased percentage of electrolyte leakage, endogenous Proline and lipid peroxidation.”
t0“GREEN BEAN (PHASEOLUS VULGARIS) SEEDLINGS”
Claim · model-written summary
Salt increased shoot and root activities of four antioxidant enzymes.
- Taxon
- green beane0
- Organ / stage
- shoots and rootse0
- Treatment
- salt stresse0
- Outcome
- Activities of peroxidase(PX), ascorbate peroxidae (APX), superoxide dismutase (SOD), and catalase (CAT)e0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Activities of peroxidase(PX), ascorbate peroxidae (APX), superoxide dismutase (SOD), and catalase (CAT), were significantly increased in shoots and roots of green bean seedlings subjected to salt stress.”
Claim · model-written summary
Glycinebetaine increased relative water content and chlorophyll under salt stress.
- Taxon
- green beene0
- Treatment
- Exogenous application of GBe0
- Outcome
- RWC and chlorophyll contents in leavese0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Exogenous application of GB improves salt tolerance of green been seedlings as shown by increased RWC and chlorophyll contents in leaves and reduced percentage of electrolyte leakage, lipid peroxidation and proline content.”
Claim · model-written summary
Glycinebetaine reduced electrolyte leakage, lipid peroxidation and proline.
- Taxon
- green beene0
- Treatment
- Exogenous application of GBe0
- Outcome
- percentage of electrolyte leakage, lipid peroxidation and proline contente0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Exogenous application of GB improves salt tolerance of green been seedlings as shown by increased RWC and chlorophyll contents in leaves and reduced percentage of electrolyte leakage, lipid peroxidation and proline content.”
Claim · model-written summary
Under salt stress glycinebetaine decreased PX, CAT, APX and SOD activity in shoots.
- Taxon
- GREEN BEANt0
- Organ / stage
- seedling shootse0
- Treatment
- GB applicatione0
- Outcome
- activities of PX, CAT, APX and SODe0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Under salinity stress condition, GB application decreased the activities of PX, CAT, APX and SOD in seedling shoots, whereas, it increased the activities of CAT and AP in roots.”
t0“GREEN BEAN (PHASEOLUS VULGARIS) SEEDLINGS”
Claim · model-written summary
Under salt stress glycinebetaine increased CAT and AP activity in roots.
- Taxon
- GREEN BEANt0
- Organ / stage
- rootse0
- Treatment
- GB applicatione0
- Outcome
- activities of CAT and APe0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Under salinity stress condition, GB application decreased the activities of PX, CAT, APX and SOD in seedling shoots, whereas, it increased the activities of CAT and AP in roots.”
t0“GREEN BEAN (PHASEOLUS VULGARIS) SEEDLINGS”
Claim · model-written summary
Authors infer glycinebetaine improves tolerance to salt oxidative damage by upregulating antioxidant defense.
Verbatim
e0“The result suggests that exogenous application of GB increased green bean seedlings' tolerance to salt-induced oxidative damage by upregulating their antioxidant defense system where this compatible solute protect plant cell against salinity stress.”
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