Abstract
Abstract Introduction Seed dormancy regulates germination timing to improve seedling survival. Many temperate species produce physiologically dormant seeds, requiring winter conditions (i.e. moist‐cold stratification) to overcome dormancy. Exposing seeds to suboptimal stratification lengths for restoration may alter genetic diversity and/or stratification requirements in offspring. Objectives We investigate how the moist‐cold stratification length seeds are exposed to impacts on germination in offspring and whether variation in seed dormancy is under genetic and/or environmental control, with implications for producing and using germplasm for restoration. Methods For one population of each of three Viola species, we created two F0 subpopulations using short versus long moist‐cold stratification. Resulting plants were grown in a common environment for two generations, with germination proportion and rate quantified under short, long, and no moist‐cold stratification treatments. We also assessed the proportion of variation in germination explained by genotype and the interaction between genotype and environment. Results Moist‐cold stratification length significantly impacted germination in all study species, but transgenerational effects were limited: germination proportion was greater in one species but only when F0 and F1 seeds were exposed to shorter stratification, while germination rate was two to three times slower in another species, but varied by subpopulation. Between 10 and 22% of variation in germination was explained by genotype and its interaction with the environment. Conclusions The length of moist‐cold stratification seeds with physiological dormancy is exposed to in production may alter how restored populations perform. Species producing seeds with deeper dormancy may be more likely to be impacted.
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Claims 7
Claim · model-written summary
Moist-cold stratification length significantly affected germination in all three Viola species.
ViolaNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For one population of each of three Viola species”
e1“Moist‐cold stratification length significantly impacted germination in all study species”
Claim · model-written summary
Transgenerational effects of stratification length on germination in Viola were limited.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For one population of each of three Viola species”
e2“transgenerational effects were limited”
Claim · model-written summary
In one Viola species, germination proportion was greater only when F0 and F1 seeds were exposed to shorter stratification.
- Organ / stage
- F0 and F1 seedse3
- Treatment
- shorter stratificatione3
- Outcome
- germination proportione3
- Direction
- greatere3
- Qualifier
- in one speciese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For one population of each of three Viola species”
e3“germination proportion was greater in one species but only when F0 and F1 seeds were exposed to shorter stratification”
Claim · model-written summary
In another Viola species, germination rate was two to three times slower.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For one population of each of three Viola species”
e4“germination rate was two to three times slower in another species, but varied by subpopulation”
Claim · model-written summary
Germination rate in Viola varied by subpopulation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For one population of each of three Viola species”
e4“germination rate was two to three times slower in another species, but varied by subpopulation”
Claim · model-written summary
Genotype and its interaction with environment explained 10 to 22% of the variation in germination in Viola.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For one population of each of three Viola species”
e5“Between 10 and 22% of variation in germination was explained by genotype and its interaction with the environment”
Claim · model-written summary
Viola species producing seeds with deeper dormancy may be more likely to be impacted by stratification length in restored populations.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For one population of each of three Viola species”
e6“Species producing seeds with deeper dormancy may be more likely to be impacted”
The same questions in other papers
seed treatment · growth · ViolaResults agree
1 paper in the same direction as this paper
- 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.