Abstract
A study was conducted to determine germination response to temperature and salinity and seedling response to salinity by three height forms of the salt marsh grass Spartina alterniflora Loisel. Germination tests showed that seeds cannot withstand drying at moderate temperature, as viability was lost within 40 days in seeds stored dry at 72 F. Cold storage at 43 F is adequate to prevent desiccation up to 40 days, but after 8 months viability is lost. Viability is retained at least 8 months when seeds are stored in sea water at 43 F. Germination response was good in a 65–95 F alternating diurnal thermoperiod but was poor in a 72 F constant thermoperiod. Germination response to salinity was an inverse curvilinear relationship with germination inhibition at high salinities apparently due to osmotic effects. The maximum tolerance limit for germination lies between 6 and 8 % NaCl. Seeds from short, medium, and tall plants responded similarly in storage and temperature studies. However, in salinity studies, seeds of the Ocracoke Island short form and the Oak Island tall form performed best. A logarithmic curve best described seedling growth response to various NaCl levels. Growth response as measured by seedling dry weight was best in 0.5 % NaCl solution. Seedlings grew taller in both 0.5 and 1.0 % NaCl than in 0 % NaCl. No significant difference in seedling growth response due to height form of the parent plant was detected. Thus, on the basis of germination and seedling responses, the height forms of S. alterniflora in North Carolina salt marshes are best described as ecophenes.
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Claims 15
Claim · model-written summary
Seeds stored dry at 72 F lost viability within 40 days.
- Taxon
- Spartina alterniflora
Sporobolus alternifloruse0 - Treatment
- seeds stored dry at 72 Fe1
- Outcome
- viabilitye1
- Qualifier
- within 40 dayse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e1“seeds cannot withstand drying at moderate temperature, as viability was lost within 40 days in seeds stored dry at 72 F”
Claim · model-written summary
Cold storage at 43 F prevented desiccation for up to 40 days.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Treatment
- Cold storage at 43 Fe2
- Outcome
- desiccatione2
- Direction
- prevente2
- Qualifier
- up to 40 dayse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e2“Cold storage at 43 F is adequate to prevent desiccation up to 40 days, but after 8 months viability is lost”
Claim · model-written summary
Viability of cold-stored seeds was lost after 8 months.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Treatment
- Cold storage at 43 Fe2
- Outcome
- viabilitye2
- Qualifier
- after 8 monthse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e2“Cold storage at 43 F is adequate to prevent desiccation up to 40 days, but after 8 months viability is lost”
Claim · model-written summary
Seeds stored in sea water at 43 F retained viability for at least 8 months.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Treatment
- stored in sea water at 43 Fe3
- Outcome
- Viabilitye3
- Direction
- retainede3
- Qualifier
- at least 8 monthse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e3“Viability is retained at least 8 months when seeds are stored in sea water at 43 F”
Claim · model-written summary
Germination was good in a 65–95 F alternating diurnal thermoperiod compared with a 72 F constant thermoperiod.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Treatment
- 65–95 F alternating diurnal thermoperiode4
- Outcome
- Germination responsee4
- Direction
- goode4
- Comparator
- 72 F constant thermoperiode4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e4“Germination response was good in a 65–95 F alternating diurnal thermoperiod but was poor in a 72 F constant thermoperiod”
Claim · model-written summary
Germination was poor in a 72 F constant thermoperiod compared with a 65–95 F alternating diurnal thermoperiod.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Treatment
- 72 F constant thermoperiode4
- Outcome
- Germination responsee4
- Direction
- poore4
- Comparator
- 65–95 F alternating diurnal thermoperiode4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e4“Germination response was good in a 65–95 F alternating diurnal thermoperiod but was poor in a 72 F constant thermoperiod”
Claim · model-written summary
Germination response to salinity was an inverse curvilinear relationship, with inhibition at high salinities.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Treatment
- salinitye5
- Outcome
- Germination response to salinitye5
- Direction
- inversee5
- Qualifier
- at high salinitiese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e5“Germination response to salinity was an inverse curvilinear relationship with germination inhibition at high salinities apparently due to osmotic effects”
Claim · model-written summary
The maximum tolerance limit for germination lies between 6 and 8% NaCl.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Outcome
- maximum tolerance limit for germinatione6
- Value
- 6 and 8 % NaCle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e6“The maximum tolerance limit for germination lies between 6 and 8 % NaCl”
Claim · model-written summary
Seeds from short, medium and tall plants responded similarly in storage and temperature studies.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Material
- short, medium, and tall plantse7
- Outcome
- responded similarlye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e7“Seeds from short, medium, and tall plants responded similarly in storage and temperature studies”
Claim · model-written summary
In salinity studies, seeds of the Ocracoke Island short form and the Oak Island tall form performed best.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Material
- Ocracoke Island short form and the Oak Island tall forme2
- Outcome
- performed beste2
- Qualifier
- in salinity studiese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e2“in salinity studies, seeds of the Ocracoke Island short form and the Oak Island tall form performed best”
Claim · model-written summary
A logarithmic curve best described seedling growth response to NaCl levels.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Treatment
- various NaCl levelse1
- Outcome
- seedling growth responsee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e1“A logarithmic curve best described seedling growth response to various NaCl levels”
Claim · model-written summary
Seedling dry weight was best in 0.5% NaCl solution.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Treatment
- 0.5 % NaCl solutione1
- Outcome
- seedling dry weighte1
- Direction
- beste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e1“Growth response as measured by seedling dry weight was best in 0.5 % NaCl solution”
Claim · model-written summary
Seedlings grew taller in 0.5 and 1.0% NaCl than in 0% NaCl.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Treatment
- 0.5 and 1.0 % NaCle1
- Outcome
- Seedlings grew tallere1
- Direction
- tallere1
- Comparator
- 0 % NaCle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e1“Seedlings grew taller in both 0.5 and 1.0 % NaCl than in 0 % NaCl”
Claim · model-written summary
No significant difference in seedling growth response was detected between height forms of the parent plant.
- Taxon
- Spartina alternifloraSporobolus alternifloruse0
- Material
- height form of the parent plante1
- Outcome
- seedling growth responsee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the salt marsh grass Spartina alterniflora Loisel”
e1“No significant difference in seedling growth response due to height form of the parent plant was detected”
Claim · model-written summary
The height forms of S. alterniflora in North Carolina salt marshes are best described as ecophenes.
- Taxon
- S. alternifloraSporobolus alternifloruse1
- Outcome
- ecophenese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the height forms of S. alterniflora in North Carolina salt marshes are best described as ecophenes”
The same questions in other papers
sodium chloride · growth · Sporobolus alterniflorus (smooth cordgrass)Positive and negative results
4 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
4 papers more in this group
See all 8 papers →storage · growth · Sporobolus alterniflorus (smooth cordgrass)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.