Paper · 2006 · Journal of Integrative Plant Biology

Does Seed Priming Induce Changes in the Levels of Some Endogenous Plant Hormones in Hexaploid Wheat Plants Under Salt Stress?

Muhammad Iqbal; Muhammad Ashraf; Amer Jamil; et al.

14
claims
25
verbatim quotes
149
citations
2
research areas
—
Not open access

Abstract

Abstract In order to assess whether salt tolerance could be improved in spring wheat ( Triticum aestivum L.), the present study was performed by soaking the seeds of two cultivars, namely MH‐97 (salt sensitive) and Inqlab‐91 (salt tolerant), for 12 h in distilled water or 100 mol/m 3 CaCl 2 , KCl, or NaCl. Primed seeds from each treatment group and non‐primed seeds were sown in a field in which NaCl salinity of 15 dS/m was developed. Priming of seeds with CaCl 2 , followed by priming with KCl and NaCl, was found to be effective in alleviating the adverse effects of salt stress on both wheat cultivars in terms of shoot fresh and dry weights and grain yield. Priming with CaCl 2 alleviated the adverse effects of salt stress on hormonal balance in plants of both cultivars. In MH‐97 plants, CaCl 2 pretreatment considerably reduced leaf abscisic acid (ABA) concentrations and increased leaf free salicylic acid (SA) concentrations under both saline and non‐saline conditions. In contrast, in the Inqlab‐91 plant, CaCl 2 increased free indoleacetic acid (IAA) and indolebutyric acid (IBA) content. However, priming of seeds with CaCl 2 did not alter free polyamine levels in either cultivar, although spermidine levels were considerably lower in plants raised from seeds treated with CaCl 2 for both cultivars under saline conditions. Priming with KCl increased growth in Inqlab‐91 plants, but not in MH‐97 plants, under saline conditions. The salinity induced reduction in auxins (IAA and IBA) was alleviated by NaCl priming in both cultivars under saline conditions. However, NaCl increased leaf free ABA content and lowered leaf SA and putrescine levels in Inqlab‐91 plants under saline conditions. In conclusion, although all three priming agents (i.e. CaCl 2 , KCl, and NaCl) were effective in alleviating the adverse effects of salt stress on wheat plants, their effects on altering the levels of different plant hormones were different in the two cultivars. (Managing editor: Ping He)

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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 14

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

CaCl 2 priming alleviated salt stress effects on shoot weights and grain yield in both cultivars.

Treatment
Priming of seeds with CaCl 2e0
Outcome
shoot fresh and dry weights and grain yielde0
Direction
alleviatinge0

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

“Priming of seeds with CaCl 2 , followed by priming with KCl and NaCl, was found to be effective in alleviating the adverse effects of salt stress on both wheat cultivars in terms of shoot fresh and dry weights and grain yield.”

✓ located verbatim in the source · abstract, characters 438–664 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

KCl priming alleviated salt stress effects on shoot weights and grain yield in both cultivars.

Treatment
priming with KCle0
Outcome
shoot fresh and dry weights and grain yielde0
Direction
alleviatinge0

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

“priming with KCl and NaCl, was found to be effective in alleviating the adverse effects of salt stress on both wheat cultivars in terms of shoot fresh and dry weights and grain yield.”

✓ located verbatim in the source · abstract, characters 481–664 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

NaCl priming alleviated salt stress effects on shoot weights and grain yield in both cultivars.

Treatment
NaCle0
Outcome
shoot fresh and dry weights and grain yielde0
Direction
alleviatinge0

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

“priming with KCl and NaCl, was found to be effective in alleviating the adverse effects of salt stress on both wheat cultivars in terms of shoot fresh and dry weights and grain yield.”

✓ located verbatim in the source · abstract, characters 481–664 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

CaCl 2 priming alleviated salt stress effects on hormonal balance in both cultivars.

Treatment
CaCl 2e0
Outcome
hormonal balancee0
Direction
alleviatede0

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

“Priming with CaCl 2 alleviated the adverse effects of salt stress on hormonal balance in plants of both cultivars.”

✓ located verbatim in the source · abstract, characters 665–779 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

CaCl 2 pretreatment reduced leaf ABA in MH‐97 under saline and non saline conditions.

Material
MH‐97e0
Treatment
CaCl 2 pretreatmente0
Outcome
leaf abscisic acid (ABA) concentrationse0
Direction
reducede0

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

“In MH‐97 plants, CaCl 2 pretreatment considerably reduced leaf abscisic acid (ABA) concentrations and increased leaf free salicylic acid (SA) concentrations under both saline and non‐saline conditions.”

✓ located verbatim in the source · abstract, characters 780–981 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

CaCl 2 pretreatment increased leaf free SA in MH‐97 under saline and non saline conditions.

Material
MH‐97e0
Treatment
CaCl 2 pretreatmente0
Outcome
leaf free salicylic acid (SA) concentrationse0
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

“In MH‐97 plants, CaCl 2 pretreatment considerably reduced leaf abscisic acid (ABA) concentrations and increased leaf free salicylic acid (SA) concentrations under both saline and non‐saline conditions.”

✓ located verbatim in the source · abstract, characters 780–981 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

CaCl 2 increased free IAA and IBA in Inqlab‐91.

Material
Inqlab‐91e0
Treatment
CaCl 2e0
Outcome
free indoleacetic acid (IAA) and indolebutyric acid (IBA) contente0
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

“In contrast, in the Inqlab‐91 plant, CaCl 2 increased free indoleacetic acid (IAA) and indolebutyric acid (IBA) content.”

✓ located verbatim in the source · abstract, characters 982–1102 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

CaCl 2 priming did not alter free polyamine levels in either cultivar.

Treatment
CaCl 2e0
Outcome
free polyamine levelse0
Direction
did not altere0

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

“priming of seeds with CaCl 2 did not alter free polyamine levels in either cultivar”

✓ located verbatim in the source · abstract, characters 1112–1195 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

CaCl 2 priming lowered spermidine under saline conditions in both cultivars.

Treatment
seeds treated with CaCl 2e0
Outcome
spermidine levelse0
Direction
lowere0

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

“spermidine levels were considerably lower in plants raised from seeds treated with CaCl 2 for both cultivars under saline conditions”

✓ located verbatim in the source · abstract, characters 1206–1338 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

KCl priming increased growth in Inqlab‐91 under salinity.

Material
Inqlab‐91e0
Treatment
Priming with KCle0
Outcome
growthe0
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

“Priming with KCl increased growth in Inqlab‐91 plants, but not in MH‐97 plants, under saline conditions.”

✓ located verbatim in the source · abstract, characters 1340–1444 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

KCl priming did not increase growth in MH‐97 under salinity.

Material
MH‐97e0
Treatment
Priming with KCle0
Outcome
growthe0
Direction
note0

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

“Priming with KCl increased growth in Inqlab‐91 plants, but not in MH‐97 plants, under saline conditions.”

✓ located verbatim in the source · abstract, characters 1340–1444 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

NaCl priming alleviated salinity induced reductions in IAA and IBA in both cultivars.

Treatment
NaCl priminge0
Outcome
auxins (IAA and IBA)e0
Direction
alleviatede0

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 salinity induced reduction in auxins (IAA and IBA) was alleviated by NaCl priming in both cultivars under saline conditions.”

✓ located verbatim in the source · abstract, characters 1445–1573 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

NaCl priming increased leaf free ABA in Inqlab‐91 under salinity.

Material
Inqlab‐91e0
Treatment
NaCle0
Outcome
leaf free ABA contente0
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

“NaCl increased leaf free ABA content and lowered leaf SA and putrescine levels in Inqlab‐91 plants under saline conditions.”

✓ located verbatim in the source · abstract, characters 1583–1706 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

NaCl priming lowered leaf SA and putrescine in Inqlab‐91 under salinity.

Material
Inqlab‐91e0
Treatment
NaCle0
Outcome
leaf SA and putrescine levelse0
Direction
lowerede0

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

“NaCl increased leaf free ABA content and lowered leaf SA and putrescine levels in Inqlab‐91 plants under saline conditions.”

✓ located verbatim in the source · abstract, characters 1583–1706 · show in text ↑
t0

“Wheat Plants”

✓ located verbatim in the source · title, characters 94–106 · show in text ↑

sodium chloride · yield · Triticum aestivum (wheat)Results differ

28 papers: 9 positive, 19 negative or no effect

8 papers in the same direction as this paper · 19 in the opposite direction

  1. negative
  2. negative
  3. negative

24 papers more in this group

See all 28 papers →

potassium chloride · yield · Triticum aestivum (wheat)Results differ

32 papers: 28 positive, 4 negative or no effect

27 papers in the same direction as this paper · 4 in the opposite direction

  1. no effect
  2. no effect
  3. no effect

28 papers more in this group

See all 32 papers →

calcium dichloride · molecular: metabolites · Triticum aestivum (wheat)Positive and negative results

3 papers: 2 positive, 1 negative or no effect

2 in the opposite direction

  1. positive
  2. positive
See all 3 papers →

calcium dichloride · yield · Triticum aestivum (wheat)Positive and negative results

8 papers: 7 positive, 1 negative or no effect

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

  1. no effect
  2. positive
  3. positive

4 papers more in this group

See all 8 papers →

potassium chloride · growth · Triticum aestivum (wheat)Positive and negative results

20 papers: 18 positive, 2 negative or no effect

17 papers in the same direction as this paper · 2 in the opposite direction

  1. no effect
  2. negative
  3. positive

16 papers more in this group

See all 20 papers →

sodium chloride · molecular: metabolites · Triticum aestivum (wheat)Positive and negative results

29 papers: 10 positive, 19 negative or no effect

9 papers in the same direction as this paper · 19 in the opposite direction

  1. negative
  2. no effect
  3. negative

25 papers more in this group

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seed treatment · molecular: metabolites · Triticum aestivum (wheat)Positive and negative results

41 papers: 38 positive, 3 negative or no effect

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

  1. positive
  2. no effect
  3. no effect

37 papers more in this group

See all 41 papers →

seed treatment · growth · Triticum aestivum (wheat)Positive and negative results

293 papers: 259 positive, 34 negative or no effect

258 papers in the same direction as this paper · 31 in the opposite direction · 3 reporting no difference from an alternative

  1. positive
  2. positive
  3. positive

289 papers more in this group

See all 293 papers →

8 of 9 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.