Abstract
Winter chilling is of central importance in the phenology of temperate annual and perennial plants. Chilling accelerates flowering through the process of vernalization and breaks both bud and seed dormancy, permitting the onset of growth in the spring. The quantitative effects of chilling in floral promotion in winter annual Arabidopsis accessions are well-documented, but very little is known about the basic physiology underlying summer annual responses to winter chilling, which acts on seeds within the soil seed bank. Here, we analyse the response of wild accessions to extended chilling in seeds, and explore the interaction between seed-maturation temperature and chilling responses. We show that two weeks of chilling induces secondary dormancy, and that this time period is not dependent on seed-maturation temperature. In addition, we found that seeds for most accessions set under simulated summer conditions in the laboratory are unable to overwinter in the soil seed bank, as they germinate without light during extended chilling treatments. This shows that these seeds are committed to re-establishment in the same growing season. Understanding how winter chilling affects the timing of Arabidopsis phenology will enable us to explore the genetics behind adaptation to changing climates, and inform rational approaches to breeding crops with improved performance under new climate scenarios and develop a systems ecology of Arabidopsis.
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Claims 4
Claim · model-written summary
Two weeks of chilling induced secondary dormancy.
- Taxon
- Arabidopsis
Arabidopsist0 - Treatment
- two weeks of chillinge0
- Outcome
- secondary dormancye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two weeks of chilling induces secondary dormancy”
t0“Arabidopsis seeds”
Claim · model-written summary
The two week threshold for chilling induced dormancy did not depend on seed maturation temperature.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- seed-maturation temperaturee0
- Outcome
- this time periode0
- Direction
- not dependente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this time period is not dependent on seed-maturation temperature”
t0“Arabidopsis seeds”
Claim · model-written summary
Seeds of most accessions matured under simulated summer conditions germinated without light during extended chilling.
- Taxon
- ArabidopsisArabidopsist0
- Material
- most accessionse0
- Treatment
- extended chilling treatmentse0
- Outcome
- germinate without lighte0
- Setting
- soil seed banke0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seeds for most accessions set under simulated summer conditions in the laboratory are unable to overwinter in the soil seed bank, as they germinate without light during extended chilling treatments”
t0“Arabidopsis seeds”
Claim · model-written summary
Seeds from most summer matured accessions were unable to overwinter in the soil seed bank.
- Taxon
- ArabidopsisArabidopsist0
- Material
- most accessionse0
- Outcome
- unable to overwinter in the soil seed banke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seeds for most accessions set under simulated summer conditions in the laboratory are unable to overwinter in the soil seed bank”
t0“Arabidopsis seeds”
The same questions in other papers
cold · growth · ArabidopsisPositive and negative results
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See all 12 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.