Abstract
Nitric oxide (NO) is dynamic molecule implicated in diverse biological functions demonstrating its protective effect against damages provoked by abiotic stresses. The present study investigated that exogenous NO pretreatment (500 µM sodium nitroprusside, 24 h) prevented the adverse effect of drought stress [induced by 10% and 20% polyethylene glycol (PEG), 48 h] on rapeseed seedlings. Drought stress resulted in reduced relative water content with increased proline (Pro) level. Drought stress insisted high H2O2 generation and consequently increased membrane lipid peroxidation which are clear indications of oxidative damage. Drought stress disrupted the glyoxalase system too. Exogenous NO successfully alleviated oxidative damage effects on rapeseed seedlings through improving the levels of nonenzymatic antioxidant pool and upregulating antioxidant enzymes’ activities. Improvement of glyoxalase system (glyoxalase I and glyoxalase II activities) by exogenous NO was significant to improve plants’ tolerance. Nonetheless, regulation of Pro level and improvement of plant–water status were vital to confer drought stress tolerance.
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Claims 10
Claim · model-written summary
Drought stress reduced relative water content in rapeseed seedlings.
Not reportedComparator
Verbatim
e0“Drought stress resulted in reduced relative water content with increased proline (Pro) level”
t0“rapeseed”
Claim · model-written summary
Drought stress increased proline in rapeseed seedlings.
Not reportedComparator
Verbatim
e0“Drought stress resulted in reduced relative water content with increased proline (Pro) level”
t0“rapeseed”
Claim · model-written summary
Drought stress increased H2O2 generation in rapeseed seedlings.
Not reportedComparator
Verbatim
e0“Drought stress insisted high H2O2 generation and consequently increased membrane lipid peroxidation”
t0“rapeseed”
Claim · model-written summary
Drought stress increased membrane lipid peroxidation in rapeseed seedlings.
Not reportedComparator
Verbatim
e0“Drought stress insisted high H2O2 generation and consequently increased membrane lipid peroxidation”
t0“rapeseed”
Claim · model-written summary
Drought stress disrupted the glyoxalase system in rapeseed.
Not reportedComparator
Verbatim
e0“Drought stress disrupted the glyoxalase system too”
t0“rapeseed”
Claim · model-written summary
Exogenous NO improved the nonenzymatic antioxidant pool in drought-stressed rapeseed.
- Taxon
- rapeseede0
- Treatment
- Exogenous NOe0
- Outcome
- levels of nonenzymatic antioxidant poole0
- Direction
- improvinge0
Not reportedComparator
Verbatim
e0“Exogenous NO successfully alleviated oxidative damage effects on rapeseed seedlings through improving the levels of nonenzymatic antioxidant pool and upregulating antioxidant enzymes’ activities”
Claim · model-written summary
Exogenous NO increased antioxidant enzyme activity in drought-stressed rapeseed.
- Taxon
- rapeseede0
- Treatment
- Exogenous NOe0
- Outcome
- antioxidant enzymes’ activitiese0
- Direction
- upregulatinge0
Not reportedComparator
Verbatim
e0“Exogenous NO successfully alleviated oxidative damage effects on rapeseed seedlings through improving the levels of nonenzymatic antioxidant pool and upregulating antioxidant enzymes’ activities”
Claim · model-written summary
Exogenous NO alleviated oxidative damage in rapeseed seedlings.
Not reportedComparator
Verbatim
e0“Exogenous NO successfully alleviated oxidative damage effects on rapeseed seedlings”
Claim · model-written summary
Exogenous NO improved glyoxalase I and II activities.
- Taxon
- rapeseedt0
- Treatment
- exogenous NOe0
- Outcome
- glyoxalase I and glyoxalase II activitiese0
- Direction
- Improvemente0
Not reportedComparator
Verbatim
e0“Improvement of glyoxalase system (glyoxalase I and glyoxalase II activities) by exogenous NO was significant”
t0“rapeseed”
Claim · model-written summary
Regulation of proline and plant water status was interpreted as important for drought tolerance.
Verbatim
e0“regulation of Pro level and improvement of plant–water status were vital to confer drought stress tolerance”
t0“rapeseed”
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