Paper · 2026 · Allelopathy Journal

Allelopathic effects of aqueous extracts of Cyperus papyrus L on bacteria in root nodules of Pisum sativum L.

Wasan S. Hussain; Noor Al Huda A.M. Taher; Amjad A. Mohammed

10
claims
20
verbatim quotes
0
citations
1
research areas
—
Not open access

Abstract

We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars (Iraqi and Turkish, Local varieties). The extracts reduced the Plant height, root length, dry weight of shoot and root by 23.5 %, 42.30 %, 45.65 % and 50 %, respectively, in Iraqi variety. The aqueous extract of papyrus at the highest concentration of 10 % decreased the root nodules numbers in both varieties, the highest decrease (88.88 %) was in Iraqi variety. Morphological, biochemical and molecular analyses were performed on two bacterial strains isolated from the root nodules of the control sample and from the aqueous extract of papyrus leaves at 5 % concentration for the Iraqi variety, while no isolates were recorded at 10 % concentration. Sequence analysis using DNA BLAST showed 97 % similarity with bacterial isolates from the genus Siccibacter (strain Siccibacter colletis N16, accession number MN555377.1) and 99 % similarity with isolates from the genus Staphylococcus (strain Staphylococcus warneri Dk131, registered with NCBI). All isolates with 16S rRNA sequences were registered as new strains in Mosul in Gene Bank (NCBI) and the phylogenetic tree of these isolates was constructed using MEGA 6.

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Claims 10

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Papyrus extracts reduced plant height in the Iraqi pea variety by 23.5 %.

Taxon
Pisum sativum LLathyrus oleraceuse0
Material
Iraqi varietye1
Treatment
papyrus (Cyperus papyrus L) extractse0
Interactor
Cyperus papyrus LCyperus papyruse0other
Outcome
Plant heighte1
Direction
reducede1
Value
23.5 %e1

Not reportedComparator

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

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗
Cyperus papyrus
Cyperus papyrus · InteractorBernard DUPONT from FRANCE · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars”

✓ located verbatim in the source · abstract, characters 0–173 · show in text ↑
e1

“The extracts reduced the Plant height, root length, dry weight of shoot and root by 23.5 %, 42.30 %, 45.65 % and 50 %, respectively, in Iraqi variety”

✓ located verbatim in the source · abstract, characters 212–361 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Papyrus extracts reduced root length in the Iraqi pea variety by 42.30 %.

Taxon
Pisum sativum LLathyrus oleraceuse0
Material
Iraqi varietye1
Treatment
papyrus (Cyperus papyrus L) extractse0
Interactor
Cyperus papyrus LCyperus papyruse0other
Outcome
root lengthe1
Direction
reducede1
Value
42.30 %e1

Not reportedComparator

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

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗
Cyperus papyrus
Cyperus papyrus · InteractorBernard DUPONT from FRANCE · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars”

✓ located verbatim in the source · abstract, characters 0–173 · show in text ↑
e1

“The extracts reduced the Plant height, root length, dry weight of shoot and root by 23.5 %, 42.30 %, 45.65 % and 50 %, respectively, in Iraqi variety”

✓ located verbatim in the source · abstract, characters 212–361 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Papyrus extracts reduced shoot dry weight in the Iraqi pea variety by 45.65 %.

Taxon
Pisum sativum LLathyrus oleraceuse0
Material
Iraqi varietye1
Treatment
papyrus (Cyperus papyrus L) extractse0
Interactor
Cyperus papyrus LCyperus papyruse0other
Outcome
dry weight of shoote1
Direction
reducede1
Value
45.65 %e1

Not reportedComparator

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

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗
Cyperus papyrus
Cyperus papyrus · InteractorBernard DUPONT from FRANCE · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars”

✓ located verbatim in the source · abstract, characters 0–173 · show in text ↑
e1

“The extracts reduced the Plant height, root length, dry weight of shoot and root by 23.5 %, 42.30 %, 45.65 % and 50 %, respectively, in Iraqi variety”

✓ located verbatim in the source · abstract, characters 212–361 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Papyrus extracts reduced dry weight of shoot and root in the Iraqi pea variety by 50 %, the root value.

Taxon
Pisum sativum LLathyrus oleraceuse0
Material
Iraqi varietye1
Treatment
papyrus (Cyperus papyrus L) extractse0
Interactor
Cyperus papyrus LCyperus papyruse0other
Outcome
dry weight of shoot and roote1
Direction
reducede1
Value
50 %e1
Qualifier
respectivelye1

Not reportedComparator

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

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗
Cyperus papyrus
Cyperus papyrus · InteractorBernard DUPONT from FRANCE · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars”

✓ located verbatim in the source · abstract, characters 0–173 · show in text ↑
e1

“The extracts reduced the Plant height, root length, dry weight of shoot and root by 23.5 %, 42.30 %, 45.65 % and 50 %, respectively, in Iraqi variety”

✓ located verbatim in the source · abstract, characters 212–361 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The 10 % aqueous papyrus extract decreased root nodule numbers in both pea varieties.

Taxon
Pisum sativum LLathyrus oleraceuse0
Material
both varietiese2
Treatment
aqueous extract of papyruse2
Interactor
Cyperus papyrus LCyperus papyruse0other
Outcome
root nodules numberse2
Direction
decreasede2
Qualifier
at the highest concentration of 10 %e2

Not reportedComparator

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

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗
Cyperus papyrus
Cyperus papyrus · InteractorBernard DUPONT from FRANCE · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars”

✓ located verbatim in the source · abstract, characters 0–173 · show in text ↑
e2

“The aqueous extract of papyrus at the highest concentration of 10 % decreased the root nodules numbers in both varieties, the highest decrease (88.88 %) was in Iraqi variety”

✓ located verbatim in the source · abstract, characters 363–536 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The largest decrease in root nodule numbers, 88.88 %, occurred in the Iraqi variety.

Taxon
Pisum sativum LLathyrus oleraceuse0
Material
Iraqi varietye2
Treatment
aqueous extract of papyruse2
Interactor
Cyperus papyrus LCyperus papyruse0other
Outcome
root nodules numberse2
Direction
highest decreasee2
Value
88.88 %e2
Qualifier
at the highest concentration of 10 %e2

Not reportedComparator

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

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗
Cyperus papyrus
Cyperus papyrus · InteractorBernard DUPONT from FRANCE · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars”

✓ located verbatim in the source · abstract, characters 0–173 · show in text ↑
e2

“The aqueous extract of papyrus at the highest concentration of 10 % decreased the root nodules numbers in both varieties, the highest decrease (88.88 %) was in Iraqi variety”

✓ located verbatim in the source · abstract, characters 363–536 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

No bacterial isolates were recovered from pea root nodules at the 10 % papyrus extract concentration.

Taxon
Pisum sativum LLathyrus oleraceuse0
Treatment
10 % concentratione3
Outcome
isolatese3
Qualifier
no isolates were recordede3

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

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗

Verbatim

e0

“We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars”

✓ located verbatim in the source · abstract, characters 0–173 · show in text ↑
e3

“no isolates were recorded at 10 % concentration”

✓ located verbatim in the source · abstract, characters 778–825 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Isolate 16S rRNA sequences showed 97 % similarity with the genus Siccibacter.

Taxon
Pisum sativum LLathyrus oleraceuse0
Interactor
bacterial isolatese4symbiont
Outcome
similaritye4
Value
97 %e4
Qualifier
Siccibacter colletis N16e4

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

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗

Verbatim

e0

“We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars”

✓ located verbatim in the source · abstract, characters 0–173 · show in text ↑
e4

“Sequence analysis using DNA BLAST showed 97 % similarity with bacterial isolates from the genus Siccibacter (strain Siccibacter colletis N16, accession number MN555377.1)”

✓ located verbatim in the source · abstract, characters 827–997 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Isolate 16S rRNA sequences showed 99 % similarity with Staphylococcus warneri Dk131.

Taxon
Pisum sativum LLathyrus oleraceuse0
Interactor
isolatese5symbiont
Outcome
similaritye5
Value
99 %e5
Qualifier
Staphylococcus warneri Dk131e5

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

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗

Verbatim

e0

“We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars”

✓ located verbatim in the source · abstract, characters 0–173 · show in text ↑
e5

“99 % similarity with isolates from the genus Staphylococcus (strain Staphylococcus warneri Dk131, registered with NCBI)”

✓ located verbatim in the source · abstract, characters 1002–1121 · show in text ↑
Observationobservedoriginal resultbasis n/a

Claim · model-written summary

The isolates were registered as new strains in Gene Bank.

Taxon
Pisum sativum LLathyrus oleraceuse0
Outcome
new strainse6

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

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗

Verbatim

e0

“We determined the allelopathic effect of papyrus (Cyperus papyrus L) extracts (0,5,10 %) on growth and root nodules and their bacteria of two pea (Pisum sativum L) cultivars”

✓ located verbatim in the source · abstract, characters 0–173 · show in text ↑
e6

“All isolates with 16S rRNA sequences were registered as new strains in Mosul in Gene Bank (NCBI)”

✓ located verbatim in the source · abstract, characters 1123–1219 · show in text ↑

Cyperus papyrus · growth · Lathyrus oleraceus (pea)Results agree

2 papers: 0 positive, 2 negative or no effect

1 paper in the same direction as this paper

  1. negative
See all 2 papers →

Cyperus papyrus · symbiosis · Lathyrus oleraceus (pea)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 →

botanical · symbiosis · Lathyrus oleraceus (pea)Positive and negative results

5 papers: 2 positive, 3 negative or no effect

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

  1. positive
  2. positive
  3. negative

1 paper more in this group

See all 5 papers →

botanical · growth · Lathyrus oleraceus (pea)Positive and negative results

62 papers: 37 positive, 25 negative or no effect

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

  1. positive
  2. positive
  3. positive

58 papers more in this group

See all 62 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.