Paper · 2026 · PLoS ONE

Invasive Argemone mexicana’s suppressive effects on germination and early growth of Triticum aestivum and Hordeum vulgare in South-western Saudi Arabia

Manal A. Alshaqhaa; Imen Souid; Manar D. Alshehri; et al.

5
claims
6
verbatim quotes
0
citations
1
research areas
✓
Open access · cc-by

Abstract

The invasion of exotic plant species has emerged as a global problem that impacts the ecosystems, economy, and human health, and is the reason for biodiversity loss. Argemone mexicana L. is one of the plants that was recorded as an invasive plant species in south-western Saudi Arabia. Allelochemical properties have been stated but not empirically evaluated on economically important staple crops. In the present study, the phenotype of the A. mexicana L. plant was described using major and minor phenotypic morphology, and morphological seed. Additionally, laboratory experiments were conducted to evaluate the allelopathic effects of water extract of A. mexicana L. on radicle and plumule length of Triticum aestivum and Hordeum vulgare. Results showed that the allelopathic potential of leaf and seed extracts of A. mexicana decreased the seed germination (until 66.66%), plumule length (93.94%-94.94%), and radicle length (96.68%- 96.96%) respectively for T. aestivum and H. vulgare with a rise in extract concentration. Moreover, it was observed that the A. mexicana seed extract is more allelopathically effective than leaf extract. Hence, it could be concluded that the seed and leaf aqueous extracts contain water-soluble allelochemicals, which could inhibit seed germination of T. aestivum and H. vulgare.

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

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Claims 5

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Leaf and seed extracts of A. mexicana decreased seed germination of T. aestivum and H. vulgare, up to 66.66%, with rising extract concentration.

Taxon
T. aestivum and H. vulgareHordeum vulgareTriticum aestivume1
Treatment
leaf and seed extracts of A. mexicanae1
Interactor
A. mexicanaArgemone mexicanae1weed
Outcome
seed germinatione1
Direction
decreasede1
Value
66.66%e1
Qualifier
with a rise in extract concentratione1

Not reportedComparator

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

Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Argemone mexicana
Argemone mexicana · InteractorB.navez · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“the allelopathic potential of leaf and seed extracts of A. mexicana decreased the seed germination (until 66.66%), plumule length (93.94%-94.94%), and radicle length (96.68%- 96.96%) respectively for T. aestivum and H. vulgare with a rise in extract concentration”

✓ located verbatim in the source · abstract, characters 762–1025 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Leaf and seed extracts of A. mexicana decreased plumule length of T. aestivum and H. vulgare by 93.94% to 94.94%, with rising extract concentration.

Taxon
T. aestivum and H. vulgareHordeum vulgareTriticum aestivume1
Treatment
leaf and seed extracts of A. mexicanae1
Interactor
A. mexicanaArgemone mexicanae1weed
Outcome
plumule lengthe1
Direction
decreasede1
Value
93.94%-94.94%e1
Qualifier
with a rise in extract concentratione1

Not reportedComparator

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

Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Argemone mexicana
Argemone mexicana · InteractorB.navez · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“the allelopathic potential of leaf and seed extracts of A. mexicana decreased the seed germination (until 66.66%), plumule length (93.94%-94.94%), and radicle length (96.68%- 96.96%) respectively for T. aestivum and H. vulgare with a rise in extract concentration”

✓ located verbatim in the source · abstract, characters 762–1025 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Leaf and seed extracts of A. mexicana decreased radicle length of T. aestivum and H. vulgare by 96.68% to 96.96%, with rising extract concentration.

Taxon
T. aestivum and H. vulgareHordeum vulgareTriticum aestivume1
Treatment
leaf and seed extracts of A. mexicanae1
Interactor
A. mexicanaArgemone mexicanae1weed
Outcome
radicle lengthe1
Direction
decreasede1
Value
96.68%- 96.96%e1
Qualifier
with a rise in extract concentratione1

Not reportedComparator

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

Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Argemone mexicana
Argemone mexicana · InteractorB.navez · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“the allelopathic potential of leaf and seed extracts of A. mexicana decreased the seed germination (until 66.66%), plumule length (93.94%-94.94%), and radicle length (96.68%- 96.96%) respectively for T. aestivum and H. vulgare with a rise in extract concentration”

✓ located verbatim in the source · abstract, characters 762–1025 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The A. mexicana seed extract is more allelopathically effective than the leaf extract against T. aestivum and H. vulgare.

Taxon
T. aestivum and H. vulgareHordeum vulgareTriticum aestivume1
Treatment
A. mexicana seed extracte2
Interactor
A. mexicanaArgemone mexicanae2weed
Outcome
allelopathically effectivee2
Direction
moree2
Comparator
leaf extracte2

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

Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Argemone mexicana
Argemone mexicana · InteractorB.navez · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“the allelopathic potential of leaf and seed extracts of A. mexicana decreased the seed germination (until 66.66%), plumule length (93.94%-94.94%), and radicle length (96.68%- 96.96%) respectively for T. aestivum and H. vulgare with a rise in extract concentration”

✓ located verbatim in the source · abstract, characters 762–1025 · show in text ↑
e2

“the A. mexicana seed extract is more allelopathically effective than leaf extract”

✓ located verbatim in the source · abstract, characters 1058–1139 · show in text ↑
Mechanismauthor interpretationoriginal resultnegativebasis n/a

Claim · model-written summary

The seed and leaf aqueous extracts of A. mexicana are concluded to contain water-soluble allelochemicals that could inhibit seed germination of T. aestivum and H. vulgare.

Taxon
T. aestivum and H. vulgareHordeum vulgareTriticum aestivume3
Treatment
seed and leaf aqueous extractse3
Compound
water-soluble allelochemicalse3
Outcome
seed germinatione3

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

Hordeum vulgare
Hordeum vulgare · TaxonJackyM59 · CC BY-SA 4.0 · Wikimedia Commons ↗
Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e3

“the seed and leaf aqueous extracts contain water-soluble allelochemicals, which could inhibit seed germination of T. aestivum and H. vulgare”

✓ located verbatim in the source · abstract, characters 1175–1315 · show in text ↑

botanical · growth · Hordeum vulgare (barley)Positive and negative results

84 papers: 48 positive, 36 negative or no effect

35 papers in the same direction as this paper · 48 in the opposite direction

  1. positive
  2. positive
  3. positive

80 papers more in this group

See all 84 papers →

botanical · growth · Triticum aestivum (wheat)Positive and negative results

435 papers: 206 positive, 229 negative or no effect

228 papers in the same direction as this paper · 206 in the opposite direction

  1. positive
  2. positive
  3. positive

431 papers more in this group

See all 435 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.