Abstract
The autoallelopathic effects of foliage on seed germination and seedling development of guava (Psidium guajava L.) was investigated. Compared with the distilled water control, most of the aqueous extracts of 10, 20, 30, 40, and 50 g dry leaves of guava in a liter of distilled water reduced the final germination percentage, the germination rate, as evaluated by the corrected germination rateindex (CGRI), and the radicle growth rate. The detrimental effects on these parameters increased with the increase of the extract concentration. Using mannitol solutions with the same pH and osmotic potentials as the extracts resulted in significantly higher germination percentage and rate and radiclegrowth rate than most of their corresponding extracts. Consequently, it could be concluded that guava leaves contain allelochemicals which could inhibit seed germination and seedling radical growth of that species
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Claims 4
Claim · model-written summary
Most guava leaf extracts reduced final germination percentage, germination rate and radicle growth rate relative to distilled water.
- Taxon
- guava
Psidium guajavae1 - Treatment
- aqueous extracts of 10, 20, 30, 40, and 50 g dry leaves of guava in a liter of distilled watere2
- Outcome
- final germination percentage, the germination rate, as evaluated by the corrected germination rateindex (CGRI), and the radicle growth ratee2
- Direction
- reducede2
- Comparator
- distilled water controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The autoallelopathic effects of foliage on seed germination and seedling development of guava (Psidium guajava L.) was investigated”
e2“most of the aqueous extracts of 10, 20, 30, 40, and 50 g dry leaves of guava in a liter of distilled water reduced the final germination percentage, the germination rate, as evaluated by the corrected germination rateindex (CGRI), and the radicle growth rate”
e3“Compared with the distilled water control”
Claim · model-written summary
Detrimental effects of guava leaf extracts on germination increased with extract concentration.
- Taxon
- guavaPsidium guajavae1
- Treatment
- extract concentratione4
- Outcome
- detrimental effects on these parameterse4
- Direction
- increasede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The autoallelopathic effects of foliage on seed germination and seedling development of guava (Psidium guajava L.) was investigated”
e4“The detrimental effects on these parameters increased with the increase of the extract concentration”
Claim · model-written summary
Mannitol solutions with matched osmotic potential gave significantly higher germination and radicle growth than most corresponding extracts.
- Taxon
- guavaPsidium guajavae1
- Treatment
- mannitol solutionse5
- Outcome
- germination percentage and rate and radiclegrowth ratee5
- Direction
- significantly highere5
- Comparator
- most of their corresponding extractse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The autoallelopathic effects of foliage on seed germination and seedling development of guava (Psidium guajava L.) was investigated”
e5“Using mannitol solutions with the same pH and osmotic potentials as the extracts resulted in significantly higher germination percentage and rate and radiclegrowth rate than most of their corresponding extracts”
Claim · model-written summary
Guava leaves contain allelochemicals that could inhibit seed germination and seedling radical growth.
- Taxon
- guavaPsidium guajavae6
- Compound
- allelochemicalse6
- Outcome
- seed germination and seedling radical growthe6
- Qualifier
- coulde6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“guava leaves contain allelochemicals which could inhibit seed germination and seedling radical growth of that species”
The same questions in other papers
mannitol · growth · Psidium guajava (guava)Results agree
1 paper in the same direction as this paper
- positive
botanical · growth · Psidium guajava (guava)Positive and negative results
7 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 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.