Paper · 2020 · Indian Journal of Ecology

Efficacy of different bioassays for the assessment of toxicity of plant extracts

Sudhir Kumar; M. Chauhan; Neerja Singh; et al.

6
claims
8
verbatim quotes
0
citations
2
research areas
—
Not open access

Abstract

The toxicity of eight weed species was assessed by four bioassays using different organism's viz., wheat (Triticum aestivum L), rice (Oryza sativa L.), lettuce (Lactuca sativa L.) in terrestrial, and duckweed (Spirodela polyrhiza L.) in aquatic medium. Among all, wheat bioassay gave the best results. The growth of wheat seedlings in different concentrations (1 to 3% w/v) of aqueous leachate of 5 species, C. album, E. ciliaris, A. mexicana, T. grandis and V hastata reduced significantly, whereas, A. ramosa, P. virgatum and V. cineraria were found to be least affected. Lettuce and rice bioassay were not found suitable for ascertaining allelopathy. Duckweed bioassay gave doubtful results in some species. The study suggested the use of wheat bioassay for assessment of allelopathy of plant extracts in India.

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Claims 6

Method / resourceobservedoriginal resultmeasured

Claim · model-written summary

The wheat bioassay gave the best results among the four bioassays for weed extracts.

Outcome
the best resultse1
Comparator
Among alle1

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

e1

“Among all, wheat bioassay gave the best results”

✓ located verbatim in the source · abstract, characters 253–300 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Aqueous leachates of C. album and E. ciliaris at 1 to 3% w/v reduced the growth of wheat seedlings significantly.

Treatment
aqueous leachatee2
Interactor
C. albume2weed
Second interactor
E. ciliarise2weed
Outcome
growth of wheat seedlingse2
Direction
reducede2
Qualifier
1 to 3% w/ve2

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

e2

“The growth of wheat seedlings in different concentrations (1 to 3% w/v) of aqueous leachate of 5 species, C. album, E. ciliaris, A. mexicana, T. grandis and V hastata reduced significantly”

✓ located verbatim in the source · abstract, characters 302–490 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Aqueous leachates of A. ramosa and P. virgatum were found to be least affecting wheat seedling growth.

Treatment
aqueous leachatee2
Interactor
A. ramosae3weed
Second interactor
P. virgatume3weed
Outcome
growth of wheat seedlingse2
Direction
least affectede3
Qualifier
V. cinerariae3

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

e2

“The growth of wheat seedlings in different concentrations (1 to 3% w/v) of aqueous leachate of 5 species, C. album, E. ciliaris, A. mexicana, T. grandis and V hastata reduced significantly”

✓ located verbatim in the source · abstract, characters 302–490 · show in text ↑
e3

“whereas, A. ramosa, P. virgatum and V. cineraria were found to be least affected”

✓ located verbatim in the source · abstract, characters 492–572 · show in text ↑
Method / resourceobservedoriginal resultmeasured

Claim · model-written summary

Lettuce and rice bioassays were not suitable for ascertaining allelopathy, compared with the wheat bioassay.

Taxon
lettuce and riceLactuca sativaOryza sativae4
Outcome
suitable for ascertaining allelopathye4
Comparator
wheat bioassaye1

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

Lactuca sativa
Lactuca sativa · Taxonen:User:Geographer · CC BY 1.0 · Wikimedia Commons ↗
Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e1

“Among all, wheat bioassay gave the best results”

✓ located verbatim in the source · abstract, characters 253–300 · show in text ↑
e4

“Lettuce and rice bioassay were not found suitable for ascertaining allelopathy”

✓ located verbatim in the source · abstract, characters 574–652 · show in text ↑
Method / resourceobservedoriginal resultmeasured

Claim · model-written summary

Duckweed bioassay gave doubtful results in some species.

Taxon
DuckweedLemnae5
Outcome
doubtful resultse5
Qualifier
in some speciese5

Not reportedComparator

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

Lemna
Lemna · Taxon · picture from its Wikimedia Commons categoryRudolphous · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e5

“Duckweed bioassay gave doubtful results in some species”

✓ located verbatim in the source · abstract, characters 654–709 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The wheat bioassay is suggested for assessing allelopathy of plant extracts in India.

Outcome
assessment of allelopathy of plant extractse6

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

e6

“The study suggested the use of wheat bioassay for assessment of allelopathy of plant extracts in India”

✓ located verbatim in the source · abstract, characters 711–813 · show in text ↑