Abstract
Tomato is considered one of the most popular vegetables worldwide playing a vital role in human nutrition.Alkalinity is common environmental stresses which limits agricultural crop production.In order to investigate the impact of trace elements of selenium on agro-physiological features of tomato under alkaline stress conditions, two experiments were organized as a randomized complete block design and each treatment four replications were conducted in the greenhouse of Horticultural Department, Faculty of Agriculture, Ain-shams University, Egypt.The experimental groups were the followings: (1) untreated plants (control), (2) plant treated with of 75 mM sodium carbonate (Na2CO3), (3) plants treated with selenium (Se, at rate of 5 M and (4) plants treated with selenium and sodium carbonate.the obtained results showed that the exogenous application of Se caused a significant improvement in shoot biomasses, leaf photosynthetic pigments (Chlorophyll a, b, total and carotenoids), and leaf relative water and leaf proline content compared to untreated plants, under normal and alkaline stress conditions.Under alkaline stress conditions, application of Se significantly increased the activity levels of leaf antioxidant enzymes (SOD, CAT, POX and APX) when compared with control treatment.On the contrary, higher reduction in the sodium content (Na), Na/K ratio, hydrogen peroxide (H2O2), malondialdehyde (MDA) and membrane stability index (MSI) was observed in the leaves of tomato plants sprayed with Se more than untreated ones.In both conditions, application of selenium increased the potassium content (K) in the plant leaves more than that in untreated plants.Based on the results, selenium applications could be suggested as promising treatment to alleviate adverse effects of alkalinity stress on agro-physiological and biochemical characteristics.
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Claims 10
Claim · model-written summary
Selenium significantly increased tomato shoot biomass under normal and alkaline conditions.
- Treatment
- exogenous application of See0
- Outcome
- shoot biomassese0
- Direction
- improvemente0
- Comparator
- untreated plantse0
Not reportedTaxon
Verbatim
e0“exogenous application of Se caused a significant improvement in shoot biomasses, leaf photosynthetic pigments (Chlorophyll a, b, total and carotenoids), and leaf relative water and leaf proline content compared to untreated plants, under normal and alkaline stress conditions.”
Claim · model-written summary
Selenium significantly improved leaf photosynthetic pigments under normal and alkaline conditions.
- Treatment
- exogenous application of See0
- Outcome
- leaf photosynthetic pigments (Chlorophyll a, b, total and carotenoids)e0
- Direction
- improvemente0
- Comparator
- untreated plantse0
Not reportedTaxon
Verbatim
e0“exogenous application of Se caused a significant improvement in shoot biomasses, leaf photosynthetic pigments (Chlorophyll a, b, total and carotenoids), and leaf relative water and leaf proline content compared to untreated plants, under normal and alkaline stress conditions.”
Claim · model-written summary
Selenium significantly improved leaf relative water under normal and alkaline conditions.
- Treatment
- exogenous application of See0
- Outcome
- leaf relative watere0
- Direction
- improvemente0
- Comparator
- untreated plantse0
Not reportedTaxon
Verbatim
e0“exogenous application of Se caused a significant improvement in shoot biomasses, leaf photosynthetic pigments (Chlorophyll a, b, total and carotenoids), and leaf relative water and leaf proline content compared to untreated plants, under normal and alkaline stress conditions.”
Claim · model-written summary
Selenium significantly improved leaf proline content under normal and alkaline conditions.
- Treatment
- exogenous application of See0
- Outcome
- leaf proline contente0
- Direction
- improvemente0
- Comparator
- untreated plantse0
Not reportedTaxon
Verbatim
e0“exogenous application of Se caused a significant improvement in shoot biomasses, leaf photosynthetic pigments (Chlorophyll a, b, total and carotenoids), and leaf relative water and leaf proline content compared to untreated plants, under normal and alkaline stress conditions.”
Claim · model-written summary
Under alkalinity, selenium significantly increased leaf SOD, CAT, POX and APX activities.
- Treatment
- application of See0
- Outcome
- activity levels of leaf antioxidant enzymes (SOD, CAT, POX and APX)e0
- Direction
- increasede0
- Comparator
- control treatmente0
Not reportedTaxon
Verbatim
e0“Under alkaline stress conditions, application of Se significantly increased the activity levels of leaf antioxidant enzymes (SOD, CAT, POX and APX) when compared with control treatment.”
Claim · model-written summary
Selenium reduced leaf sodium content and Na/K ratio.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- sprayed with See0
- Outcome
- sodium content (Na), Na/K ratioe0
- Direction
- reductione0
- Comparator
- untreated onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher reduction in the sodium content (Na), Na/K ratio, hydrogen peroxide (H2O2), malondialdehyde (MDA) and membrane stability index (MSI) was observed in the leaves of tomato plants sprayed with Se more than untreated ones.”
Claim · model-written summary
Selenium reduced leaf hydrogen peroxide and malondialdehyde.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- sprayed with See0
- Outcome
- hydrogen peroxide (H2O2), malondialdehyde (MDA)e0
- Direction
- reductione0
- Comparator
- untreated onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher reduction in the sodium content (Na), Na/K ratio, hydrogen peroxide (H2O2), malondialdehyde (MDA) and membrane stability index (MSI) was observed in the leaves of tomato plants sprayed with Se more than untreated ones.”
Claim · model-written summary
Selenium reduced leaf membrane stability index.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- sprayed with See0
- Outcome
- membrane stability index (MSI)e0
- Direction
- reductione0
- Comparator
- untreated onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher reduction in the sodium content (Na), Na/K ratio, hydrogen peroxide (H2O2), malondialdehyde (MDA) and membrane stability index (MSI) was observed in the leaves of tomato plants sprayed with Se more than untreated ones.”
Claim · model-written summary
Selenium increased leaf potassium under both conditions.
- Treatment
- application of seleniume0
- Outcome
- potassium content (K)e0
- Direction
- increasede0
- Comparator
- untreated plantse0
Not reportedTaxon
Verbatim
e0“In both conditions, application of selenium increased the potassium content (K) in the plant leaves more than that in untreated plants.”
Claim · model-written summary
The authors suggest selenium application to alleviate adverse alkalinity effects.
- Outcome
- selenium applications could be suggested as promising treatmente0
Not reportedTaxon
Verbatim
e0“selenium applications could be suggested as promising treatment to alleviate adverse effects of alkalinity stress on agro-physiological and biochemical characteristics.”
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