Abstract
The autoalle1opathic effects of date palm leaflets and seed aqueous extracts, with -0.05, -0.1 and -0.2 mPa osmotic potentials, on seed germination and early seedling growth were investigated. Final seed germination percentage, seed germination rate, the time of radicle appearance, and plumule length were not affected. In contrast, the cotyledonary sheath and radicle lengths were significantly retarded, whereas the time of plumule appearance was significantly increased by most of the extracts in comparison with the distilled water control. Mannitol solutions, with the same osmotic potential and pH as the extracts, resulted in significantly longer cotyledonary sheaths and radicles and an earlier plumule appearance than their corresponding extracts. Thus, it could be deduced that date palm leaflets and seeds contain water-soluble allelochemicals that could substantially retard early seedling growth of the same species.
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Claims 6
Claim · model-written summary
Date palm extracts did not affect final germination percentage, rate, radicle appearance time, or plumule length.
- Taxon
- date palm
Phoenix dactyliferae1 - Treatment
- date palm leaflets and seed aqueous extractse1
- Outcome
- Final seed germination percentage, seed germination rate, the time of radicle appearance, and plumule lengthe0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Final seed germination percentage, seed germination rate, the time of radicle appearance, and plumule length were not affected”
e1“date palm leaflets and seed aqueous extracts”
Claim · model-written summary
Most extracts significantly retarded cotyledonary sheath and radicle lengths versus distilled water.
- Taxon
- date palmPhoenix dactyliferae1
- Treatment
- most of the extractse0
- Outcome
- cotyledonary sheath and radicle lengthse0
- Direction
- retardede0
- Comparator
- distilled water controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cotyledonary sheath and radicle lengths were significantly retarded, whereas the time of plumule appearance was significantly increased by most of the extracts in comparison with the distilled water control”
e1“date palm leaflets and seed aqueous extracts”
Claim · model-written summary
Most extracts significantly delayed plumule appearance versus distilled water.
- Taxon
- date palmPhoenix dactyliferae1
- Treatment
- most of the extractse0
- Outcome
- time of plumule appearancee0
- Direction
- increasede0
- Comparator
- distilled water controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the time of plumule appearance was significantly increased by most of the extracts in comparison with the distilled water control”
e1“date palm leaflets and seed aqueous extracts”
Claim · model-written summary
Mannitol controls yielded significantly longer sheaths and radicles than corresponding extracts.
- Taxon
- date palmPhoenix dactyliferae1
- Treatment
- Mannitol solutionse0
- Outcome
- cotyledonary sheaths and radiclese0
- Direction
- longere0
- Comparator
- their corresponding extractse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mannitol solutions, with the same osmotic potential and pH as the extracts, resulted in significantly longer cotyledonary sheaths and radicles and an earlier plumule appearance than their corresponding extracts”
e1“date palm leaflets and seed aqueous extracts”
Claim · model-written summary
Mannitol controls produced earlier plumule appearance than corresponding extracts.
- Taxon
- date palmPhoenix dactyliferae1
- Treatment
- Mannitol solutionse0
- Outcome
- plumule appearancee0
- Direction
- earliere0
- Comparator
- their corresponding extractse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mannitol solutions, with the same osmotic potential and pH as the extracts, resulted in significantly longer cotyledonary sheaths and radicles and an earlier plumule appearance than their corresponding extracts”
e1“date palm leaflets and seed aqueous extracts”
Claim · model-written summary
Authors infer water-soluble allelochemicals in date palm leaflets and seeds can retard seedling growth.
- Taxon
- date palmPhoenix dactyliferae0
- Compound
- water-soluble allelochemicalse0
- Outcome
- early seedling growthe0
- Direction
- retarde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“date palm leaflets and seeds contain water-soluble allelochemicals that could substantially retard early seedling growth of the same species”
The same questions in other papers
botanical · growth · Phoenix dactylifera (date palm)Positive and negative results
2 papers in the same direction as this paper · 15 in the opposite direction
- positive
- positive
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See all 18 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.