Abstract
Introduction: is a promising oilseed crop for cultivation on saline marginal lands due to its abiotic stress tolerance and low input requirements. However, intraspecific variation in salinity tolerance remains poorly understood. Methods: This study, through three sequential experiments, applied a screening framework integrating time-to-event modeling, stress tolerance indices (STIs), and multivariate clustering to dissect variation in salinity tolerance across early developmental stages. In experiment 1, two commercial varieties were germinated under a gradient from 0 to 300 mM of NaCl. In experiment 2, 57 camelina accessions were evaluated at 0 and 200 mM of NaCl for six germination indices (total germination, germination index, mean germination time, velocity coefficient, synchronization index, and normality rate) expressed as STIs, to quantify relative performance under salinity. In experiment 3, 13 representative accessions were assessed for seedling STIs (shoot length, main root length, lateral root length) under 0 and 200 mM of NaCl. Results and discussion: Time-to-event analysis revealed significant varietal differences in germination dynamics, with 200 mM identified as the optimal threshold for discriminating genotypic responses without complete germination inhibition. Most accessions retained ≥90% total germination under salinity, yet principal component analysis and hierarchical k-means clustering classified them into three phenotypic groups with distinct germination strategies. Salinity strongly reduced lateral root length (-90%), main root length (-80%), and shoot length (-30%), indicating altered biomass allocation in response to salt stress. Integration of germination clusters with seedling responses revealed three adaptive strategies: 1) high but delayed germination accompanied by strong seedling vigor, 2) low germination with intermediate seedling tolerance, and 3) high and rapid germination accompanied by poor seedling growth. Conclusions: for saline environments.
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Claims 10
Claim · model-written summary
Varieties differed significantly in germination dynamics under salt stress.
- Taxon
- Camelina sativa
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Camelina sativat0 - Material
- varietale0
- Outcome
- germination dynamicse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Time-to-event analysis revealed significant varietal differences in germination dynamics”
t0“Camelina sativa”
Claim · model-written summary
A 200 mM NaCl threshold best discriminated genotypic germination responses without complete inhibition.
- Taxon
- Camelina sativaCamelina sativat0
- Treatment
- 200 mMe0
- Outcome
- discriminating genotypic responsese0
- Direction
- optimale0
- Value
- 200 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with 200 mM identified as the optimal threshold for discriminating genotypic responses without complete germination inhibition”
t0“Camelina sativa”
Claim · model-written summary
Most accessions retained at least 90% total germination under salinity.
- Taxon
- Camelina sativaCamelina sativat0
- Treatment
- salinitye0
- Outcome
- total germinatione0
- Direction
- retainede0
- Value
- ≥90%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most accessions retained ≥90% total germination under salinity”
t0“Camelina sativa”
Claim · model-written summary
Clustering identified three phenotypic groups with distinct germination strategies.
- Taxon
- Camelina sativaCamelina sativat0
- Outcome
- three phenotypic groups with distinct germination strategiese0
- Value
- threee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“principal component analysis and hierarchical k-means clustering classified them into three phenotypic groups with distinct germination strategies”
t0“Camelina sativa”
Claim · model-written summary
Salinity reduced lateral root length by 90%.
- Taxon
- Camelina sativaCamelina sativat0
- Treatment
- Salinitye0
- Outcome
- lateral root lengthe0
- Direction
- reducede0
- Value
- -90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity strongly reduced lateral root length (-90%), main root length (-80%), and shoot length (-30%)”
t0“Camelina sativa”
Claim · model-written summary
Salinity reduced main root length by 80%.
- Taxon
- Camelina sativaCamelina sativat0
- Treatment
- Salinitye0
- Outcome
- main root lengthe0
- Direction
- reducede0
- Value
- -80%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity strongly reduced lateral root length (-90%), main root length (-80%), and shoot length (-30%)”
t0“Camelina sativa”
Claim · model-written summary
Salinity reduced shoot length by 30%.
- Taxon
- Camelina sativaCamelina sativat0
- Treatment
- Salinitye0
- Outcome
- shoot lengthe0
- Direction
- reducede0
- Value
- -30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity strongly reduced lateral root length (-90%), main root length (-80%), and shoot length (-30%)”
t0“Camelina sativa”
Claim · model-written summary
One adaptive group combined high delayed germination with strong seedling vigor.
- Taxon
- Camelina sativaCamelina sativat0
- Outcome
- high but delayed germination accompanied by strong seedling vigore0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high but delayed germination accompanied by strong seedling vigor”
t0“Camelina sativa”
Claim · model-written summary
A second group combined low germination with intermediate seedling tolerance.
- Taxon
- Camelina sativaCamelina sativat0
- Outcome
- low germination with intermediate seedling tolerancee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low germination with intermediate seedling tolerance”
t0“Camelina sativa”
Claim · model-written summary
A third group combined rapid high germination with poor seedling growth.
- Taxon
- Camelina sativaCamelina sativat0
- Outcome
- high and rapid germination accompanied by poor seedling growthe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high and rapid germination accompanied by poor seedling growth”
t0“Camelina sativa”
The same questions in other papers
salinity · growth · Camelina sativa (false flax)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- no effect
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.