Paper · 2023 · Plants

Exogenous Calcium Reinforces Photosynthetic Pigment Content and Osmolyte, Enzymatic, and Non-Enzymatic Antioxidants Abundance and Alleviates Salt Stress in Bread Wheat

Mervat Sh Sadak; Rania S. Hanafy; Fatma M. A. M. Elkady; et al.

9
claims
10
verbatim quotes
83
citations
1
research areas
✓
Open access · cc-by

Abstract

One of the main environmental stresses that hinder crop development as well as yield is salt stress, while the use of signal molecules such as calcium (Ca) has a substantial impact on reducing the detrimental effects of salt on different crop types. Therefore, a factorial pot experiment in a completely randomized design was conducted to examine the beneficial role of Ca (0, 2.5, and 5 mM) in promoting the physiological, biochemical, and growth traits of the wheat plant under three salt conditions viz. 0, 30, and 60 mM NaCl. Foliar application of Ca increased the growth of salt-stressed wheat plants through increasing photosynthetic pigments, IAA, proline, and total soluble sugars contents and improving antioxidant enzymes in addition to non-enzymatic antioxidants glutathione, phenol and flavonoids, β-carotene, and lycopene contents, thus causing decreases in the over-accumulation of free radicals (ROS). The application of Ca increased the activity of antioxidant enzymes in wheat plants such as superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), which scavenge reactive oxygen species (ROS) and relieved salt stress. An additional salt tolerance mechanism by Ca increases the non-antioxidant activity of plants by accumulating osmolytes such as free amino acids, proline, and total soluble sugar, which maintain the osmotic adjustment of plants under salinity stress. Exogenous Ca application is a successful method for increasing wheat plants' ability to withstand salt stress, and it has a considerable impact on the growth of wheat under salt stress.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 9

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Foliar calcium increased growth of salt-stressed wheat.

Treatment
Foliar application of Cae0
Outcome
growthe0
Direction
increasede0
Qualifier
salt-stressede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Foliar application of Ca increased the growth of salt-stressed wheat plants through increasing photosynthetic pigments, IAA, proline, and total soluble sugars contents and improving antioxidant enzymes in addition to non-enzymatic antioxidants glutathione, phenol and flavonoids, β-carotene, and lycopene contents, thus causing decreases in the over-accumulation of free radicals (ROS).”

✓ located verbatim in the source · abstract, characters 530–916 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Foliar calcium increased wheat photosynthetic pigments, IAA and proline under salt stress.

Treatment
Foliar application of Cae0
Outcome
photosynthetic pigments, IAA, prolinee0
Direction
increasinge0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Foliar application of Ca increased the growth of salt-stressed wheat plants through increasing photosynthetic pigments, IAA, proline, and total soluble sugars contents and improving antioxidant enzymes in addition to non-enzymatic antioxidants glutathione, phenol and flavonoids, β-carotene, and lycopene contents, thus causing decreases in the over-accumulation of free radicals (ROS).”

✓ located verbatim in the source · abstract, characters 530–916 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Foliar calcium increased total soluble sugars under salt stress.

Treatment
Foliar application of Cae0
Outcome
total soluble sugars contentse0
Direction
increasinge0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Foliar application of Ca increased the growth of salt-stressed wheat plants through increasing photosynthetic pigments, IAA, proline, and total soluble sugars contents and improving antioxidant enzymes in addition to non-enzymatic antioxidants glutathione, phenol and flavonoids, β-carotene, and lycopene contents, thus causing decreases in the over-accumulation of free radicals (ROS).”

✓ located verbatim in the source · abstract, characters 530–916 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Calcium increased activity of SOD, POD and CAT antioxidant enzymes in wheat.

Treatment
application of Cae0
Gene
superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT)e0
Outcome
activity of antioxidant enzymese0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The application of Ca increased the activity of antioxidant enzymes in wheat plants such as superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), which scavenge reactive oxygen species (ROS) and relieved salt stress.”

✓ located verbatim in the source · abstract, characters 917–1145 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Calcium reduced ROS overaccumulation in wheat under salt stress.

Treatment
Foliar application of Cae0
Outcome
over-accumulation of free radicals (ROS)e0
Direction
decreasese0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Foliar application of Ca increased the growth of salt-stressed wheat plants through increasing photosynthetic pigments, IAA, proline, and total soluble sugars contents and improving antioxidant enzymes in addition to non-enzymatic antioxidants glutathione, phenol and flavonoids, β-carotene, and lycopene contents, thus causing decreases in the over-accumulation of free radicals (ROS).”

✓ located verbatim in the source · abstract, characters 530–916 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Calcium increased glutathione, phenol and flavonoids in salt-stressed wheat.

Treatment
Foliar application of Cae0
Outcome
glutathione, phenol and flavonoidse0
Direction
increasinge0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Foliar application of Ca increased the growth of salt-stressed wheat plants through increasing photosynthetic pigments, IAA, proline, and total soluble sugars contents and improving antioxidant enzymes in addition to non-enzymatic antioxidants glutathione, phenol and flavonoids, β-carotene, and lycopene contents, thus causing decreases in the over-accumulation of free radicals (ROS).”

✓ located verbatim in the source · abstract, characters 530–916 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Calcium increased β-carotene and lycopene in salt-stressed wheat.

Treatment
Foliar application of Cae0
Outcome
β-carotene, and lycopene contentse0
Direction
increasinge0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Foliar application of Ca increased the growth of salt-stressed wheat plants through increasing photosynthetic pigments, IAA, proline, and total soluble sugars contents and improving antioxidant enzymes in addition to non-enzymatic antioxidants glutathione, phenol and flavonoids, β-carotene, and lycopene contents, thus causing decreases in the over-accumulation of free radicals (ROS).”

✓ located verbatim in the source · abstract, characters 530–916 · show in text ↑
Mechanismauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

Calcium increased free amino acids, proline and total soluble sugar accumulation under salinity.

Taxon
Bread WheatTriticum aestivumt0
Treatment
Cae0
Outcome
accumulating osmolytes such as free amino acids, proline, and total soluble sugare0
Direction
increasese0
Qualifier
maintain the osmotic adjustmente0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“An additional salt tolerance mechanism by Ca increases the non-antioxidant activity of plants by accumulating osmolytes such as free amino acids, proline, and total soluble sugar, which maintain the osmotic adjustment of plants under salinity stress.”

✓ located verbatim in the source · abstract, characters 1146–1396 · show in text ↑
t0

“Bread Wheat”

✓ located verbatim in the source · title, characters 156–167 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors consider exogenous Ca effective for wheat salt tolerance.

Treatment
Exogenous Ca applicatione0
Outcome
wheat plants' ability to withstand salt stresse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Exogenous Ca application is a successful method for increasing wheat plants' ability to withstand salt stress, and it has a considerable impact on the growth of wheat under salt stress.”

✓ located verbatim in the source · abstract, characters 1397–1582 · show in text ↑

calcium atom · growth · Triticum aestivum (wheat)Results differ

43 papers: 35 positive, 8 negative or no effect

34 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. negative

39 papers more in this group

See all 43 papers →

calcium atom · physiology: antioxidant enzymes · Triticum aestivum (wheat)Positive and negative results

5 papers: 4 positive, 1 negative or no effect

3 papers in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

calcium atom · physiology: oxidative · Triticum aestivum (wheat)Positive and negative results

11 papers: 8 positive, 3 negative or no effect

7 papers in the same direction as this paper · 3 in the opposite direction

  1. negative
  2. negative
  3. negative

7 papers more in this group

See all 11 papers →

calcium atom · physiology: osmolytes · Triticum aestivum (wheat)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

calcium atom · quality: phytochemicals · Triticum aestivum (wheat)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

calcium atom · physiology: photosynthesis · Triticum aestivum (wheat)Results agree

5 papers: 5 positive, 0 negative or no effect

4 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

application · quality: phytochemicals · Triticum aestivum (wheat)Positive and negative results

9 papers: 8 positive, 1 negative or no effect

7 papers in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
  3. positive

5 papers more in this group

See all 9 papers →

application · physiology: osmolytes · Triticum aestivum (wheat)Positive and negative results

33 papers: 30 positive, 3 negative or no effect

29 papers in the same direction as this paper · 3 in the opposite direction

  1. positive
  2. negative
  3. no effect

29 papers more in this group

See all 33 papers →

8 of 11 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.