Paper · 2013

Evaluation of Toxic Effect of Copper and Cadmium on Growth, Physiological Traits and Protein Profile of Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)

M. R. Metwali; Salah M. Gowayed; O. A. Almaghrabi; et al.

13
claims
20
verbatim quotes
36
citations
2
research areas
—
Not open access

Abstract

A pot experiment was carried out in order to investigate the effect of deleterious concentration of copper and cadmium either individual or in combination on three cereal crops i.e. wheat (Triticum aestivum L.), maize (Zea mays L.) and sorghum (Sorghum bicolor L.) after 2 and 4 weeks. The results showed that cadmium applied alone caused significant reduction in growth traits and photosynthesis (P< 0.05 or P <0.01). The effect was less pronounced when Cu applied alone or in combination with Cd+2. The same trends were also observed with leaf osmotic potential and relative water content under the same treatments. The stress associated protein, profiles in leaves at 14 kDa in wheat, 35 and 54 kDa in maize were disappeared, compared to others treatments, in response to 75 Cu, 150 Cu, 75 Cd+2, 150 Cd+2 and 150 Cd+2, 75 Cu +75 Cd+2 μmol/L after four weeks, respectively. A 60 and 16 kDa a soluble protein was over expressed only in sorghum under 150 Cd+2 μmol/L and in wheat under 150 Cd+2 μmol/L and 75 Cu+ + Cd+2 μmol/L. These proteins designated as cadmium stress inducible protein (CSIP) and may be appositive marker to cadmium stress tolerance in sorghum and wheat. It could be concluded that, in all three crops, the effect of different treatments were more toxic in order to Cd+2 < Cu+ + Cd+2 < Cu < control either after 2 or 4 weeks. Also, sorghum was more tolerance to heavy metal stress followed by wheat and maize; and it could help alleviate crop losses in area affected by heavy metals stress.

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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 13

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Cadmium alone significantly reduced growth traits of the three cereal crops.

Taxon
Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)Sorghum bicolorTriticum aestivumZea mayst0
Treatment
cadmium applied alonee0
Outcome
growth traitse0
Direction
reductione0

Not reportedComparator

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“cadmium applied alone caused significant reduction in growth traits and photosynthesis (P< 0.05 or P <0.01).”

✓ located verbatim in the source · abstract, characters 310–418 · show in text ↑
t0

“Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)”

✓ located verbatim in the source · title, characters 104–187 · show in text ↑
Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Cadmium alone significantly reduced photosynthesis of the three cereal crops.

Taxon
Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)Sorghum bicolorTriticum aestivumZea mayst0
Treatment
cadmium applied alonee0
Outcome
photosynthesise0
Direction
reductione0

Not reportedComparator

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“cadmium applied alone caused significant reduction in growth traits and photosynthesis (P< 0.05 or P <0.01).”

✓ located verbatim in the source · abstract, characters 310–418 · show in text ↑
t0

“Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)”

✓ located verbatim in the source · title, characters 104–187 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Copper alone had a less pronounced effect than cadmium alone.

Taxon
Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)Sorghum bicolorTriticum aestivumZea mayst0
Treatment
Cu applied alonee0
Outcome
effecte0
Direction
less pronouncede0
Comparator
Cd+2e0

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The effect was less pronounced when Cu applied alone or in combination with Cd+2.”

✓ located verbatim in the source · abstract, characters 419–500 · show in text ↑
t0

“Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)”

✓ located verbatim in the source · title, characters 104–187 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Combined copper and cadmium had a less pronounced effect than cadmium alone.

Taxon
Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)Sorghum bicolorTriticum aestivumZea mayst0
Treatment
in combination with Cd+2e0
Outcome
effecte0
Direction
less pronouncede0
Comparator
Cd+2e0

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The effect was less pronounced when Cu applied alone or in combination with Cd+2.”

✓ located verbatim in the source · abstract, characters 419–500 · show in text ↑
t0

“Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)”

✓ located verbatim in the source · title, characters 104–187 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Leaf osmotic potential followed the same treatment trend as growth and photosynthesis.

Taxon
Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)Sorghum bicolorTriticum aestivumZea mayst0
Outcome
leaf osmotic potentiale0
Direction
same trendse0
Qualifier
under the same treatmentse0

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The same trends were also observed with leaf osmotic potential and relative water content under the same treatments.”

✓ located verbatim in the source · abstract, characters 501–617 · show in text ↑
t0

“Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)”

✓ located verbatim in the source · title, characters 104–187 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Relative water content followed the same treatment trend as growth and photosynthesis.

Taxon
Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)Sorghum bicolorTriticum aestivumZea mayst0
Outcome
relative water contente0
Direction
same trendse0
Qualifier
under the same treatmentse0

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The same trends were also observed with leaf osmotic potential and relative water content under the same treatments.”

✓ located verbatim in the source · abstract, characters 501–617 · show in text ↑
t0

“Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)”

✓ located verbatim in the source · title, characters 104–187 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

The 14 kDa leaf protein band disappeared in wheat under the listed metal treatments after four weeks.

Organ / stage
leavese0
Treatment
75 Cu, 150 Cu, 75 Cd+2, 150 Cd+2 and 150 Cd+2, 75 Cu +75 Cd+2 μmol/Le0
Outcome
protein, profiles in leavese0
Direction
disappearede0
Value
14 kDae0
Qualifier
after four weekse0

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 stress associated protein, profiles in leaves at 14 kDa in wheat, 35 and 54 kDa in maize were disappeared, compared to others treatments, in response to 75 Cu, 150 Cu, 75 Cd+2, 150 Cd+2 and 150 Cd+2, 75 Cu +75 Cd+2 μmol/L after four weeks, respectively.”

✓ located verbatim in the source · abstract, characters 618–875 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

The 35 and 54 kDa leaf protein bands disappeared in maize under the listed metal treatments.

Taxon
maizeZea mayse0
Organ / stage
leavese0
Treatment
75 Cu, 150 Cu, 75 Cd+2, 150 Cd+2 and 150 Cd+2, 75 Cu +75 Cd+2 μmol/Le0
Outcome
protein, profiles in leavese0
Direction
disappearede0
Value
35 and 54 kDae0
Qualifier
after four weekse0

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The stress associated protein, profiles in leaves at 14 kDa in wheat, 35 and 54 kDa in maize were disappeared, compared to others treatments, in response to 75 Cu, 150 Cu, 75 Cd+2, 150 Cd+2 and 150 Cd+2, 75 Cu +75 Cd+2 μmol/L after four weeks, respectively.”

✓ located verbatim in the source · abstract, characters 618–875 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A 60 kDa soluble protein was overexpressed only in sorghum under 150 Cd+2 μmol/L.

Taxon
sorghumSorghume0
Treatment
150 Cd+2 μmol/Le0
Outcome
a soluble proteine0
Direction
over expressede0
Value
60e0
Qualifier
only in sorghume0

Not reportedComparator

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“A 60 and 16 kDa a soluble protein was over expressed only in sorghum under 150 Cd+2 μmol/L and in wheat under 150 Cd+2 μmol/L and 75 Cu+ + Cd+2 μmol/L.”

✓ located verbatim in the source · abstract, characters 876–1027 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A 16 kDa soluble protein was overexpressed in wheat under the specified metal treatments.

Treatment
150 Cd+2 μmol/L and 75 Cu+ + Cd+2 μmol/Le0
Outcome
a soluble proteine0
Direction
over expressede0
Value
16 kDae0

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

“A 60 and 16 kDa a soluble protein was over expressed only in sorghum under 150 Cd+2 μmol/L and in wheat under 150 Cd+2 μmol/L and 75 Cu+ + Cd+2 μmol/L.”

✓ located verbatim in the source · abstract, characters 876–1027 · show in text ↑
Method / resourceauthor interpretationoriginal resultmeasured

Claim · model-written summary

The authors proposed the cadmium-inducible proteins as markers for tolerance in sorghum and wheat.

Taxon
sorghum and wheatSorghumTriticum aestivume0
Outcome
marker to cadmium stress tolerancee0
Qualifier
may be appositivee0

Not reportedComparatorValue

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“These proteins designated as cadmium stress inducible protein (CSIP) and may be appositive marker to cadmium stress tolerance in sorghum and wheat.”

✓ located verbatim in the source · abstract, characters 1028–1175 · show in text ↑
Observationauthor interpretationoriginal resultmeasured

Claim · model-written summary

The authors ranked cadmium as more toxic than the combined treatment, copper and control across crops and times.

Taxon
Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)Sorghum bicolorTriticum aestivumZea mayst0
Outcome
more toxic in order to Cd+2 < Cu+ + Cd+2 < Cu < controle0
Qualifier
either after 2 or 4 weekse0

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“in all three crops, the effect of different treatments were more toxic in order to Cd+2 < Cu+ + Cd+2 < Cu < control either after 2 or 4 weeks.”

✓ located verbatim in the source · abstract, characters 1204–1346 · show in text ↑
t0

“Wheat (Triticum aestivium L.), Maize (Zea mays L.) and sorghum (Sorghum bicolor L.)”

✓ located verbatim in the source · title, characters 104–187 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Sorghum was more tolerant of heavy metal stress than wheat and maize.

Taxon
sorghumSorghume0
Outcome
tolerance to heavy metal stresse0
Direction
more tolerancee0
Comparator
wheat and maizee0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“sorghum was more tolerance to heavy metal stress followed by wheat and maize”

✓ located verbatim in the source · abstract, characters 1353–1429 · show in text ↑

cadmium atom · growth · Zea mays (maize)Results differ

96 papers: 11 positive, 85 negative or no effect

84 papers in the same direction as this paper · 11 in the opposite direction

  1. positive
  2. positive
  3. positive

92 papers more in this group

See all 96 papers →

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

110 papers: 20 positive, 90 negative or no effect

89 papers in the same direction as this paper · 20 in the opposite direction

  1. positive
  2. positive
  3. positive

106 papers more in this group

See all 110 papers →

cadmium atom · growth · Sorghum bicolor (sorghum)Positive and negative results

8 papers: 1 positive, 7 negative or no effect

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

  1. positive
  2. negative
  3. negative

4 papers more in this group

See all 8 papers →

cadmium atom · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results

21 papers: 5 positive, 16 negative or no effect

15 papers in the same direction as this paper · 5 in the opposite direction

  1. positive
  2. positive
  3. positive

17 papers more in this group

See all 21 papers →

cadmium atom · physiology: photosynthesis · Zea mays (maize)Positive and negative results

29 papers: 1 positive, 28 negative or no effect

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

  1. positive
  2. negative
  3. no effect

25 papers more in this group

See all 29 papers →

cadmium atom · physiology: photosynthesis · Sorghum bicolor (sorghum)Results agree

3 papers: 0 positive, 3 negative or no effect

2 papers in the same direction as this paper

  1. negative
  2. negative
See all 3 papers →

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.