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

9
claims
18
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.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 resultnegativemeasured

Claim · model-written summary

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

Taxon
Pisum sativum LLathyrus oleraceuse1
Material
Iraqi varietye0
Treatment
papyrus (Cyperus papyrus L) extractse1
Interactor
Cyperus papyrus LCyperus papyruse1other
Outcome
Plant heighte0
Direction
reducede0
Value
23.5 %e0

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

“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 ↑
e1

“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 41–173 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

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

Taxon
Pisum sativum LLathyrus oleraceuse1
Material
Iraqi varietye0
Treatment
papyrus (Cyperus papyrus L) extractse1
Interactor
Cyperus papyrus LCyperus papyruse1other
Outcome
root lengthe0
Direction
reducede0
Value
42.30 %e0

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

“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 ↑
e1

“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 41–173 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

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

Taxon
Pisum sativum LLathyrus oleraceuse1
Material
Iraqi varietye0
Treatment
papyrus (Cyperus papyrus L) extractse1
Interactor
Cyperus papyrus LCyperus papyruse1other
Outcome
dry weight of shoote0
Direction
reducede0
Value
45.65 %e0

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

“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 ↑
e1

“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 41–173 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Papyrus extracts reduced root dry weight of the Iraqi pea variety by 50 %.

Taxon
Pisum sativum LLathyrus oleraceuse1
Material
Iraqi varietye0
Treatment
papyrus (Cyperus papyrus L) extractse1
Interactor
Cyperus papyrus LCyperus papyruse1other
Outcome
dry weight of shoot and roote0
Direction
reducede0
Value
50 %e0
Qualifier
roote0

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

“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 ↑
e1

“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 41–173 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

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

Taxon
Pisum sativum LLathyrus oleraceuse1
Treatment
aqueous extract of papyrus at the highest concentration of 10 %e2
Interactor
Cyperus papyrus LCyperus papyruse1other
Outcome
root nodules numberse2
Direction
decreasede2

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

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 ↑
e1

“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 41–173 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The largest decrease in root nodule numbers, 88.88 %, occurred in the Iraqi pea variety under the 10 % papyrus extract.

Taxon
Pisum sativum LLathyrus oleraceuse1
Material
Iraqi varietye2
Treatment
aqueous extract of papyrus at the highest concentration of 10 %e2
Interactor
Cyperus papyrus LCyperus papyruse1other
Outcome
root nodules numberse2
Direction
decreasee2
Value
88.88 %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

e1

“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 41–173 · 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

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

Taxon
Pisum sativum LLathyrus oleraceuse1
Treatment
10 % concentratione3
Interactor
bacteriaBacteriae1symbiont
Second interactor
Cyperus papyrus LCyperus papyruse1other
Outcome
no isolates were recordede3
Comparator
aqueous extract of papyrus leaves at 5 % concentratione3

Not reportedDirection

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 · Second interactorBernard DUPONT from FRANCE · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e3

“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”

✓ located verbatim in the source · abstract, characters 538–825 · show in text ↑
e1

“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 41–173 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The nodule bacterial isolate sequence showed 97 % similarity with the genus Siccibacter.

Taxon
Pisum sativum LLathyrus oleraceuse1
Interactor
bacterial isolatese4symbiont
Outcome
similarity with bacterial isolates from the genus Siccibactere4
Value
97 %e4

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

e4

“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)”

✓ located verbatim in the source · abstract, characters 827–1121 · show in text ↑
e1

“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 41–173 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The nodule bacterial isolate sequence showed 99 % similarity with the genus Staphylococcus.

Taxon
Pisum sativum LLathyrus oleraceuse1
Interactor
bacterial isolatese4symbiont
Outcome
similarity with isolates from the genus Staphylococcuse4
Value
99 %e4

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

e4

“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)”

✓ located verbatim in the source · abstract, characters 827–1121 · show in text ↑
e1

“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 41–173 · 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.