Overcoming dormancy and light requirements in seeds of Heteropogon contortus, a target species for savanna restoration
| Autor: | Agathe Allibert, Jean-Noël Eric Rivière, Isabelle Fock-Bastide, Cédric Leperlier, Stéphane Lacroix, Dominique Dessauw |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Environmental Engineering F62 - Physiologie végétale - Croissance et développement Management Monitoring Policy and Law Biology biology.organism_classification 010603 evolutionary biology 01 natural sciences Dry storage Agronomy Germination F01 - Culture des plantes Darkness Heteropogon contortus parasitic diseases Dormancy 010606 plant biology & botany Nature and Landscape Conservation |
| Zdroj: | Ecological Engineering |
| Popis: | As observed at a world scale, in Reunion Island Heteropogon contortus savannas face major pressure and need to be preserved and restored. However, the use of this species in restoration projects is hampered by the limited knowledge about the seed germination ecology and more specifically about dormancy and light requirements. Dormancy state and light requirements for germination of H. contortus seeds were assessed over a 3-year after-ripening period (i.e. storage). Dormancy loss was observed after one year of storage. Between one and two years of after-ripening, H. contortus seeds exhibit significantly higher mean germination percentages in daily light than in darkness, demonstrating their positive photoblasty (i.e. requires light for germination). Smoke solutions significantly enhanced germination in both daily light and darkness during the first two years of dry storage. This study also demonstrated that smoke-infused water with beekeeping smoker fuel could be an efficient method to enhance germination of H. contortus seeds. Overall, this method could be adopted for large scale restoration projects due to its efficiency, its low cost and its reproducibility. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|