Abstract
It is known that epibrassinolide (EBL) plays an important role in the variety of plant developmental processes and adaptation to various environmental stresses. Salt stress is one of the most important environmental problems which limit crop growth and productivity. Here, the effects of EBL pretreatment on amelioration of the adverse effects of salinity were investigated in pumpkin, especially at the establishment stage. For this purpose, uniform-sized seedlings were transplanted to plastic containers containing one-half-strength Hoagland's nutrient solution. EBL was added at 0.1 and 0.01 μM to the hydroponic medium for 5 days before stress. The plants were treated with 40 and 80 mM NaCl for inducing salinity stress. Salt stress reduced the plant growth, calcium and potassium content in leaves and roots, and these detrimental effects were alleviated when plants were pretreated with EBL. Salinity stress caused a significant increase in lipid peroxidation, sodium, and γ-amino butyric acid (GABA) content. EBL pretreatment ameliorated these effects by reducing lipid peroxidation, sodium content and increasing GABA content. The increase in activities of guaiacol peroxidase, catalase, ascorbate peroxidase, and superoxide dismutase was observed under salinity stress. Application of exogenous EBL pretreatment further increased antioxidant enzymes activities. The present work emphasizes the protective role of EBL in the regulation of antioxidant enzymes and GABA accumulation and its possible link in amelioration of stress in plants. This is the first report dealing with EBL effect on GABA content under salt stress.
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Claims 11
Claim · model-written summary
Salt stress reduced pumpkin growth.
Not reportedComparator
Verbatim
e0“Salt stress reduced the plant growth, calcium and potassium content in leaves and roots”
t0“medicinal pumpkin (Cucurbita pepo)”
Claim · model-written summary
Salt stress reduced calcium and potassium content in leaves and roots.
- Taxon
- pumpkint0
- Organ / stage
- leaves and rootse0
- Treatment
- Salt stresse0
- Outcome
- calcium and potassium contente0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Salt stress reduced the plant growth, calcium and potassium content in leaves and roots”
t0“medicinal pumpkin (Cucurbita pepo)”
Claim · model-written summary
EBL pretreatment alleviated salt-induced reductions in growth and leaf and root calcium and potassium content.
Not reportedComparator
Verbatim
e0“these detrimental effects were alleviated when plants were pretreated with EBL”
t0“medicinal pumpkin (Cucurbita pepo)”
Claim · model-written summary
Salinity increased lipid peroxidation.
Not reportedComparator
Verbatim
e0“Salinity stress caused a significant increase in lipid peroxidation, sodium, and γ-amino butyric acid (GABA) content”
t0“medicinal pumpkin (Cucurbita pepo)”
Claim · model-written summary
Salinity increased sodium content.
Not reportedComparator
Verbatim
e0“Salinity stress caused a significant increase in lipid peroxidation, sodium, and γ-amino butyric acid (GABA) content”
t0“medicinal pumpkin (Cucurbita pepo)”
Claim · model-written summary
Salinity increased GABA content.
- Taxon
- pumpkint0
- Treatment
- Salinity stresse0
- Outcome
- γ-amino butyric acid (GABA) contente0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“Salinity stress caused a significant increase in lipid peroxidation, sodium, and γ-amino butyric acid (GABA) content”
t0“medicinal pumpkin (Cucurbita pepo)”
Claim · model-written summary
EBL pretreatment reduced lipid peroxidation.
Not reportedComparator
Verbatim
e0“EBL pretreatment ameliorated these effects by reducing lipid peroxidation, sodium content and increasing GABA content”
t0“medicinal pumpkin (Cucurbita pepo)”
Claim · model-written summary
EBL pretreatment reduced sodium content.
Not reportedComparator
Verbatim
e0“EBL pretreatment ameliorated these effects by reducing lipid peroxidation, sodium content and increasing GABA content”
t0“medicinal pumpkin (Cucurbita pepo)”
Claim · model-written summary
EBL pretreatment increased GABA content.
Not reportedComparator
Verbatim
e0“EBL pretreatment ameliorated these effects by reducing lipid peroxidation, sodium content and increasing GABA content”
t0“medicinal pumpkin (Cucurbita pepo)”
Claim · model-written summary
Salinity increased activities of four antioxidant enzymes.
- Taxon
- pumpkint0
- Treatment
- salinity stresse0
- Outcome
- activities of guaiacol peroxidase, catalase, ascorbate peroxidase, and superoxide dismutasee0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“The increase in activities of guaiacol peroxidase, catalase, ascorbate peroxidase, and superoxide dismutase was observed under salinity stress”
t0“medicinal pumpkin (Cucurbita pepo)”
Claim · model-written summary
EBL pretreatment further increased antioxidant enzyme activities.
- Taxon
- pumpkint0
- Treatment
- exogenous EBL pretreatmente0
- Outcome
- antioxidant enzymes activitiese0
- Direction
- further increasede0
Not reportedComparator
Verbatim
e0“Application of exogenous EBL pretreatment further increased antioxidant enzymes activities”
t0“medicinal pumpkin (Cucurbita pepo)”
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See all 15 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.