Abstract
The production of cucumber under combined salinity and heat stress is a crucial challenge facing many countries particularly in arid environments. This challenge could be controlled through exogenous foliar application of some bio-stimulants or anti-stressors. This study was carried out to investigate the management and improving cucumber production under combined salinity and heat stress. Nano-selenium (nano-Se, 25 mg L-1), silicon (Si, 200 mg L−1) and hydrogen peroxide (H2O2, 20 mmol L−1) were foliar applied on cucumber plants as anti-stress compounds. The results revealed that studied anti-stressors improved growth and productivity of cucumber grown in saline soil regardless the kind of anti-stressor under heat stress. The foliar application of nano-Se (25 mg L−1) clearly improved cucumber growth parameters (plant height and leaf area) compared to other anti-stressor and control. Foliar Si application showed the greatest impact on enzymatic antioxidant capacities among the other anti-stressor treatments. This applied rate of Si also showed the greatest increase in marketable fruit yield and yield quality (fruit firmness and total soluble solids) compared to untreated plants. These increases could be due to increasing nutrient uptake particularly N, P, K, and Mg, as well as Se (by 40.2% and 43%) in leaves and Si (by 11.2% and 22.1% in fruits) in both seasons, respectively. The potential role of Si in mitigating soil salinity under heat stress could be referred to high Si content found in leaf which regulates water losses via transpiration as well as high nutrient uptake of other nutrients (N, P, K, Mg and Se). The distinguished high K+ content found in cucumber leaves might help stressed plants to tolerate studied stresses by regulating the osmotic balance and controlling stomatal opening, which support cultivated plants to adapt to soil salinity under heat stress. Further studies are needed to be carried out concerning the different response of cultivated plants to combined stresses.
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Claims 7
Claim · model-written summary
Studied anti-stressors improve growth and productivity of cucumber grown in saline soil under heat stress.
- Taxon
- cucumber
Cucumis sativuse1 - Treatment
- studied anti-stressorse1
- Outcome
- growth and productivitye1
- Direction
- improvede1
- Qualifier
- under heat stresse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results revealed that studied anti-stressors improved growth and productivity of cucumber grown in saline soil regardless the kind of anti-stressor under heat stress”
Claim · model-written summary
Foliar nano-Se at 25 mg L−1 clearly improves cucumber growth parameters, plant height and leaf area, compared with other anti-stressors and control.
- Taxon
- cucumberCucumis sativuse1
- Treatment
- foliar application of nano-Se (25 mg L−1)e1
- Outcome
- cucumber growth parameters (plant height and leaf area)e1
- Direction
- improvede1
- Comparator
- other anti-stressor and controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The foliar application of nano-Se (25 mg L−1) clearly improved cucumber growth parameters (plant height and leaf area) compared to other anti-stressor and control”
Claim · model-written summary
Foliar silicon has the greatest impact on enzymatic antioxidant capacities among the anti-stressor treatments.
- Taxon
- cucumberCucumis sativust0
- Treatment
- Foliar Si applicatione1
- Outcome
- enzymatic antioxidant capacitiese1
- Direction
- greatest impacte1
- Comparator
- other anti-stressor treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Foliar Si application showed the greatest impact on enzymatic antioxidant capacities among the other anti-stressor treatments”
t0“cucumber under combined salinity and heat stress”
Claim · model-written summary
The applied rate of silicon gives the greatest increase in marketable fruit yield and yield quality compared with untreated plants.
- Taxon
- cucumberCucumis sativust0
- Treatment
- This applied rate of Sie1
- Outcome
- marketable fruit yield and yield qualitye1
- Direction
- greatest increasee1
- Qualifier
- fruit firmness and total soluble solidse1
- Comparator
- untreated plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“This applied rate of Si also showed the greatest increase in marketable fruit yield and yield quality (fruit firmness and total soluble solids) compared to untreated plants”
t0“cucumber under combined salinity and heat stress”
Claim · model-written summary
Selenium content in cucumber leaves increases by 40.2% and 43%.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- leavese1
- Outcome
- See1
- Direction
- increasese1
- Value
- 40.2% and 43%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These increases could be due to increasing nutrient uptake particularly N, P, K, and Mg, as well as Se (by 40.2% and 43%) in leaves and Si (by 11.2% and 22.1% in fruits) in both seasons”
t0“cucumber under combined salinity and heat stress”
Claim · model-written summary
Silicon content in cucumber fruits increases by 11.2% and 22.1%.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- fruitse1
- Outcome
- Sie1
- Direction
- increasese1
- Value
- 11.2% and 22.1%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These increases could be due to increasing nutrient uptake particularly N, P, K, and Mg, as well as Se (by 40.2% and 43%) in leaves and Si (by 11.2% and 22.1% in fruits) in both seasons”
t0“cucumber under combined salinity and heat stress”
Claim · model-written summary
K+ content is high in cucumber leaves under the studied stresses.
- Taxon
- cucumberCucumis sativuse1
- Organ / stage
- leavese1
- Outcome
- K+ contente1
- Direction
- highe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The distinguished high K+ content found in cucumber leaves might help stressed plants to tolerate studied stresses”
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