The Effect of Heat Shock on Seed Dormancy Release and Germination in Two Rare and Endangered Astragalus L. Species (Fabaceae) Article Swipe
Alba Cuena‐Lombraña
,
Ludovica Dessì
,
Lina Podda
,
Mauro Fois
,
Belén Luna
,
Marco Porceddu
,
Gianluigi Bacchetta
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.3390/plants13040484
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.3390/plants13040484
Many Astragalus species exhibit seeds with physical dormancy (PY), but little is known about the ecological context of this dormancy. We focused on A. maritimus and A. verrucosus, two threatened Sardinian endemic species inside the subgenus Trimeniaeus Bunge. Fresh seeds collected from the only two respective known populations were used to investigate the effect of mechanical scarification, heat shock, and water imbibition processes on PY release and germination. PY can be overcome through mechanical scarification of the water-impermeable seed coats, while no dormancy break was detected, nor a subsequent increase in seed germination due to fire-induced heat. This suggests that fire does not trigger dormancy release and seed germination in these species. The seeds tolerate relatively high heat shock temperatures (up to 120 and 100 °C for A. verrucosus and A. maritimus, respectively), but after 120 °C for 10 min, the number of dead seeds increases in both species. These facts suggest the capacity to develop a soil seed bank that can persist after fires and delay germination until the occurrence of optimal conditions. As regards water imbibition, both Astragalus species did not show the typical triphasic pattern, as germination started without further water uptake. This study emphasizes the significance of understanding germination processes and dormancy in threatened species. In fire-prone ecosystems, PY dormancy plays a crucial role in soil seed bank persistence, and it may be selectively influenced by post-fire conditions. Understanding such adaptations provides useful insights into conservation strategies.
Related Topics
Concepts
Scarification
Germination
Dormancy
Imbibition
Biology
Fabaceae
Seed dormancy
Context (archaeology)
Threatened species
Botany
Ecology
Habitat
Paleontology
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/plants13040484
- https://www.mdpi.com/2223-7747/13/4/484/pdf?version=1707373461
- OA Status
- gold
- Cited By
- 6
- References
- 45
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4391652203
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4391652203Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3390/plants13040484Digital Object Identifier
- Title
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The Effect of Heat Shock on Seed Dormancy Release and Germination in Two Rare and Endangered Astragalus L. Species (Fabaceae)Work title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2024Year of publication
- Publication date
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2024-02-08Full publication date if available
- Authors
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Alba Cuena‐Lombraña, Ludovica Dessì, Lina Podda, Mauro Fois, Belén Luna, Marco Porceddu, Gianluigi BacchettaList of authors in order
- Landing page
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https://doi.org/10.3390/plants13040484Publisher landing page
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https://www.mdpi.com/2223-7747/13/4/484/pdf?version=1707373461Direct link to full text PDF
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YesWhether a free full text is available
- OA status
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goldOpen access status per OpenAlex
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https://www.mdpi.com/2223-7747/13/4/484/pdf?version=1707373461Direct OA link when available
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Scarification, Germination, Dormancy, Imbibition, Biology, Fabaceae, Seed dormancy, Context (archaeology), Threatened species, Botany, Ecology, Habitat, PaleontologyTop concepts (fields/topics) attached by OpenAlex
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6Total citation count in OpenAlex
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2025: 4, 2024: 2Per-year citation counts (last 5 years)
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45Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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