Paper · 2026 · Phycology

Assessment of an Aqueous Microalgal Extract of Chlorococcum sp. as an Eco-Friendly Biostimulant to Improve Germination and Seedling Performance of Sesamum indicum L.

Khaoula Abid; Maryem Minhaj; Amer Chabili; et al.

7
claims
14
verbatim quotes
2
citations
2
research areas
✓
Open access · cc-by

Abstract

The use of biostimulants has emerged as a promising strategy for enhancing seed vigor, germination, and seedling growth. This is due to the composition of beneficial substances considered as biostimulants that modulate plant physiology and metabolism. In this context, the interest in biostimulants is growing and the use of microalgal extracts is becoming more widespread. This study aims to assess the effect of Chlorococcum sp. aqueous extracts on the germination indices and the biometric and biochemical parameters of sesame (Sesamum indicum L.). Chlorococcum sp. culture exhibited favorable growth characteristics, including high productivity, specific growth rate, and short generation time. Furthermore, analysis of the extract demonstrated that it contains a high concentration of biomolecules, which suggests significant biostimulant potential. Importantly, the results also showed a significant improvement in germination indices as well as in biochemical parameters and photosynthetic pigments in seeds treated with the highest extract concentration (2 g/L). Furthermore, improvement in biometric parameters, including radicle length as well as fresh and dry weight, was observed at low extract concentration (0.1 and 0.5 g/L). Additionally, no phytoinhibitory effects were detected. Overall, the application of microalgal aqueous extract highlights a strong potential as a sustainable and cost-effective alternative to conventional synthetic chemical fertilizers, thereby promoting the development of an environmentally friendly agricultural practice of sesame cultivation.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 7

Observationobservedoriginal resultmeasured

Claim · model-written summary

Chlorococcum sp. culture showed favorable growth characteristics, including high productivity, specific growth rate and short generation time.

Material
Chlorococcum sp.e1
Outcome
high productivity, specific growth rate, and short generation timee1
Direction
favorablee1

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

Sesamum indicum
Sesamum indicum · TaxonFranz Xaver · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“parameters of sesame (Sesamum indicum L.)”

✓ located verbatim in the source · abstract, characters 509–550 · show in text ↑
e1

“Chlorococcum sp. culture exhibited favorable growth characteristics, including high productivity, specific growth rate, and short generation time”

✓ located verbatim in the source · abstract, characters 552–697 · show in text ↑

schema checkedfield values found in the cited quotesPermalinkReport an issue

Observationobservedoriginal resultmeasured

Claim · model-written summary

The Chlorococcum sp. extract contains a high concentration of biomolecules.

Outcome
biomoleculese2
Direction
high concentratione2

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

Sesamum indicum
Sesamum indicum · TaxonFranz Xaver · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“parameters of sesame (Sesamum indicum L.)”

✓ located verbatim in the source · abstract, characters 509–550 · show in text ↑
e2

“analysis of the extract demonstrated that it contains a high concentration of biomolecules”

✓ located verbatim in the source · abstract, characters 712–802 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Sesame seeds treated with the highest extract concentration (2 g/L) showed significantly improved germination indices.

Treatment
highest extract concentration (2 g/L)e3
Outcome
germination indicese3
Direction
significant improvemente3

Not reportedComparator

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

Sesamum indicum
Sesamum indicum · TaxonFranz Xaver · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“parameters of sesame (Sesamum indicum L.)”

✓ located verbatim in the source · abstract, characters 509–550 · show in text ↑
e3

“the results also showed a significant improvement in germination indices as well as in biochemical parameters and photosynthetic pigments in seeds treated with the highest extract concentration (2 g/L)”

✓ located verbatim in the source · abstract, characters 868–1069 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Sesame seeds treated with the highest extract concentration (2 g/L) showed significantly improved biochemical parameters and photosynthetic pigments.

Treatment
highest extract concentration (2 g/L)e3
Outcome
biochemical parameters and photosynthetic pigmentse3
Direction
significant improvemente3

Not reportedComparator

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

Sesamum indicum
Sesamum indicum · TaxonFranz Xaver · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“parameters of sesame (Sesamum indicum L.)”

✓ located verbatim in the source · abstract, characters 509–550 · show in text ↑
e3

“the results also showed a significant improvement in germination indices as well as in biochemical parameters and photosynthetic pigments in seeds treated with the highest extract concentration (2 g/L)”

✓ located verbatim in the source · abstract, characters 868–1069 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Low extract concentrations (0.1 and 0.5 g/L) improved radicle length and fresh and dry weight of sesame seedlings.

Treatment
low extract concentration (0.1 and 0.5 g/L)e4
Outcome
radicle length as well as fresh and dry weighte4
Direction
improvemente4

Not reportedComparator

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

Sesamum indicum
Sesamum indicum · TaxonFranz Xaver · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“parameters of sesame (Sesamum indicum L.)”

✓ located verbatim in the source · abstract, characters 509–550 · show in text ↑
e4

“improvement in biometric parameters, including radicle length as well as fresh and dry weight, was observed at low extract concentration (0.1 and 0.5 g/L)”

✓ located verbatim in the source · abstract, characters 1084–1238 · show in text ↑
Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

The Chlorococcum sp. extract showed no phytoinhibitory effects on sesame.

Outcome
phytoinhibitory effectse5
Direction
noe5

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

Sesamum indicum
Sesamum indicum · TaxonFranz Xaver · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“parameters of sesame (Sesamum indicum L.)”

✓ located verbatim in the source · abstract, characters 509–550 · show in text ↑
e5

“no phytoinhibitory effects were detected”

✓ located verbatim in the source · abstract, characters 1254–1294 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The microalgal aqueous extract is a strong potential alternative to conventional synthetic chemical fertilizers for sesame cultivation.

Outcome
alternative to conventional synthetic chemical fertilizerse6
Comparator
conventional synthetic chemical fertilizerse6

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

Sesamum indicum
Sesamum indicum · TaxonFranz Xaver · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“parameters of sesame (Sesamum indicum L.)”

✓ located verbatim in the source · abstract, characters 509–550 · show in text ↑
e6

“a strong potential as a sustainable and cost-effective alternative to conventional synthetic chemical fertilizers”

✓ located verbatim in the source · abstract, characters 1362–1475 · show in text ↑

botanical · growth · Sesamum indicum (sesame)Positive and negative results

29 papers: 20 positive, 9 negative or no effect

19 papers in the same direction as this paper · 9 in the opposite direction

  1. negative
  2. negative
  3. negative

25 papers more in this group

See all 29 papers →

botanical · physiology: photosynthesis · Sesamum indicum (sesame)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 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.