Abstract
Abstract Effects of salinisation of soil on emergence, growth, and physiological attributes of seedlings of the date palm ( Phoenix dactylifera ) ‘Rati’ (Palmaceae) were studied. A mixture of chlorides and sulfates of Na, K, Ca, and Mg was added to the soil and salinity was maintained at 4.3, 6.0, 8.2, 10.5, 12.8, and 14.6 dS m –1 . A negative relationship between percentage seed germination and salt concentration was obtained. Seedlings did not emerge when soil salinity exceeded 12.8 dS m –1 . Results suggested that this species is salt tolerant at the seed germination stage. Seedlings survived and grew up to a soil salinity of 12.8 dS m –1 and evidently this species is salt tolerant at the seedling stage as well. Elongation of stem and root was retarded by increasing salt stress. However, this species has a tendency for rapid root penetration and roots are able to extract water from dry saline soil (6.0% moisture) below the permanent wilting percentage. Among the tissues, young roots and leaf tissue were most tolerant, whereas stem tissue was most sensitive to salt stress. This species is a halophyte and adapted to salt stress conditions by the evolution of an osmoregulation mechanism. However, osmoregulation is effective for salt tolerance only to a limited range in the continuum of salt stress. The ability of this plant to thrive in dry regions is further conferred by the xeromorphic features of its leaves.
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Claims 13
Claim · model-written summary
Percentage seed germination of date palm was negatively related to salt concentration.
- Taxon
- Phoenix dactylifera
Phoenix dactyliferat0 - Treatment
- salt concentratione1
- Outcome
- percentage seed germinatione1
- Direction
- negative relationshipe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“A negative relationship between percentage seed germination and salt concentration was obtained”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Date palm seedlings did not emerge when soil salinity exceeded 12.8 dS m –1.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Treatment
- soil salinity exceeded 12.8 dS m –1e2
- Outcome
- Seedlings did not emergee2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Seedlings did not emerge when soil salinity exceeded 12.8 dS m –1”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Date palm seedlings survived and grew up to a soil salinity of 12.8 dS m –1.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Treatment
- soil salinity of 12.8 dS m –1e3
- Outcome
- Seedlings survived and grewe3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Seedlings survived and grew up to a soil salinity of 12.8 dS m –1”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Increasing salt stress retarded stem and root elongation of date palm seedlings.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Organ / stage
- stem and roote4
- Treatment
- increasing salt stresse4
- Outcome
- Elongation of stem and roote4
- Direction
- retardede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Elongation of stem and root was retarded by increasing salt stress”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Young roots and leaf tissue of date palm seedlings were the most salt tolerant tissues.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Organ / stage
- young roots and leaf tissuee5
- Treatment
- salt stresse5
- Outcome
- most tolerante5
- Direction
- most tolerante5
- Comparator
- stem tissuee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Among the tissues, young roots and leaf tissue were most tolerant, whereas stem tissue was most sensitive to salt stress”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Stem tissue of date palm seedlings was the most salt sensitive tissue.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Organ / stage
- stem tissuee5
- Treatment
- salt stresse5
- Outcome
- most sensitivee5
- Direction
- most sensitivee5
- Comparator
- young roots and leaf tissuee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Among the tissues, young roots and leaf tissue were most tolerant, whereas stem tissue was most sensitive to salt stress”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Date palm is a halophyte that adapted to salt stress conditions through evolution of an osmoregulation mechanism.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Outcome
- adapted to salt stress conditionse6
- Qualifier
- by the evolution of an osmoregulation mechanisme6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“This species is a halophyte and adapted to salt stress conditions by the evolution of an osmoregulation mechanism”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Osmoregulation is effective for salt tolerance of date palm only over a limited range of salt stress.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Outcome
- salt tolerancee7
- Qualifier
- only to a limited range in the continuum of salt stresse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“osmoregulation is effective for salt tolerance only to a limited range in the continuum of salt stress”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Date palm roots extracted water from dry saline soil below the permanent wilting percentage.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Organ / stage
- rootse0
- Outcome
- extract watere0
- Value
- 6.0% moisturee0
- Qualifier
- below the permanent wilting percentagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots are able to extract water from dry saline soil (6.0% moisture) below the permanent wilting percentage”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Date palm has a tendency for rapid root penetration.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Organ / stage
- roote0
- Outcome
- rapid root penetratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this species has a tendency for rapid root penetration”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
The ability of date palm to thrive in dry regions is conferred by the xeromorphic features of its leaves.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Organ / stage
- leavese0
- Outcome
- ability of this plant to thrive in dry regionse0
- Qualifier
- xeromorphic features of its leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ability of this plant to thrive in dry regions is further conferred by the xeromorphic features of its leaves”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Date palm is salt tolerant at the seed germination stage.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Organ / stage
- seed germination stagee0
- Outcome
- salt tolerante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results suggested that this species is salt tolerant at the seed germination stage”
t0“Phoenix dactylifera seedlings”
Claim · model-written summary
Date palm is salt tolerant at the seedling stage.
- Taxon
- Phoenix dactyliferaPhoenix dactyliferat0
- Organ / stage
- seedling stagee0
- Outcome
- salt tolerante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evidently this species is salt tolerant at the seedling stage as well”
t0“Phoenix dactylifera seedlings”
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See all 17 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.