Abstract
Allelopathy effects vegetative development and is caused by chemical substances produced and released by surrounding plants. The objective of this work was to investigate the allelopathic activity of aqueous extracts of fresh and dried leaves and fruits of chinaberry (Melia azedarach L. – Meliaceae) on the germination and initial growth of tomato. The extracts were prepared at concentrations of 1, 2 and 4% and analyzed for their pH and osmotic potential. The experiment consisted of four replications of 25 tomato seeds that were distributed in Petri dishes containing two sheets of germitest paper. Each plate received 2mL of an extract. The seeds were evaluated for percentage of germination (PG), germination rate (VG) and germination speed index (IVG). The initial growth was assessed based on the length of the radicle, hypocotyl and leaf, and fresh and dry weight. All concentrations of the extracts exhibited inhibitory activity on germination and radicle growth, and the inhibitory effect increased as the concentration of the extract increased. Extracts from dried leaves had the greatest effects. The osmotic potential and pH of the extracts did not vary significantly compared to the control, indicating that the allelopathic effect was due to the allelochemicals in the extracts.
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Claims 6
Claim · model-written summary
All tested chinaberry extract concentrations inhibited tomato germination.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- extractse0
- Outcome
- germinatione0
- Direction
- inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All concentrations of the extracts exhibited inhibitory activity on germination”
t0“tomato”
Claim · model-written summary
All tested chinaberry extract concentrations inhibited tomato radicle growth.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- extractse0
- Outcome
- radicle growthe0
- Direction
- inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All concentrations of the extracts exhibited inhibitory activity on germination and radicle growth”
t0“tomato”
Claim · model-written summary
Inhibition increased with chinaberry extract concentration.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- concentration of the extracte0
- Outcome
- inhibitory effecte0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inhibitory effect increased as the concentration of the extract increased”
t0“tomato”
Claim · model-written summary
Dried-leaf chinaberry extracts had the greatest inhibitory effects.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Extracts from dried leavese0
- Outcome
- effectse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extracts from dried leaves had the greatest effects”
t0“tomato”
Claim · model-written summary
Extract osmotic potential and pH did not differ significantly from control.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- osmotic potential and pHe0
- Direction
- did not varye0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The osmotic potential and pH of the extracts did not vary significantly compared to the control”
t0“tomato”
Claim · model-written summary
The authors attributed inhibition to allelochemicals in the extracts.
- Taxon
- tomatoSolanum lycopersicumt0
- Compound
- allelochemicalse0
- Outcome
- allelopathic effecte0
- Qualifier
- in the extractse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the allelopathic effect was due to the allelochemicals in the extracts”
t0“tomato”
The same questions in other papers
botanical · growth · Solanum lycopersicum (tomato)Positive and negative results
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