دورية أكاديمية
Heat shock and plant leachates regulate seed germination of the endangered carnivorous plant Drosophyllum lusitanicum
| العنوان: | Heat shock and plant leachates regulate seed germination of the endangered carnivorous plant Drosophyllum lusitanicum |
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| المؤلفون: | S. Gómez-González, M. Paniw, K. Antunes, F. Ojeda |
| المصدر: | Web Ecology, Vol 18, Pp 7-13 (2018) |
| بيانات النشر: | Copernicus Publications, 2018. |
| سنة النشر: | 2018 |
| المجموعة: | LCC:Human ecology. Anthropogeography LCC:Environmental sciences LCC:Oceanography LCC:Science LCC:Biology (General) LCC:Ecology LCC:Microbiology LCC:Physiology LCC:Natural history (General) LCC:General. Including nature conservation, geographical distribution LCC:Zoology LCC:Botany |
| مصطلحات موضوعية: | Human ecology. Anthropogeography, GF1-900, Environmental sciences, GE1-350, Oceanography, GC1-1581, Science, Biology (General), QH301-705.5, Ecology, QH540-549.5, Microbiology, QR1-502, Physiology, QP1-981, Natural history (General), QH1-278.5, General. Including nature conservation, geographical distribution, QH1-199.5, Zoology, QL1-991, Botany, QK1-989 |
| الوصف: | In fire-prone ecosystems, many plant species have specialized mechanisms of seed dormancy that ensure a successful recruitment after fire. A well-documented mechanism is the germination stimulated by fire-related cues, such as heat shock and smoke. However, less is known about the role of inhibitory germination signals (e.g. allelopathy) in regulating post-fire recruitment. Plant leachates derived from the unburned vegetation can enforce dormancy by means of allelopathic compounds, acting as a signal of unfavourable (highly competitive) niche for germination in pyrophyte species. Here, we assessed the separate effects of heat shock and plant leachates on seed germination of Drosophyllum lusitanicum, an endangered carnivorous plant endemic to Mediterranean fire-prone heathlands. We performed a germination experiment in which seeds were subjected to three treatments: (1) 5 min at 100 °C, (2) watering with plant leachate, and (3) control. Germination rate and seed viability was determined after 63 days. Heat shock stimulated seed germination in D. lusitanicum while plant leachates had inhibitory germination effects without reducing seed viability. Thus, both positive and negative signals could be involved in its successful post-fire recruitment. Fire would break seed dormancy and stimulate seed germination of D. lusitanicum through high temperatures, but also by eliminating allelochemical compounds from the soil. These results help to understand the population dynamics patterns found for D. lusitanicum in natural populations, and highlight the role of fire in the ecology and conservation of this endangered species. Seed dormancy imposed by plant-derived leachates as an adaptive mechanism should be considered more in fire ecology theory. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2193-3081 1399-1183 |
| Relation: | https://www.web-ecol.net/18/7/2018/we-18-7-2018.pdf; https://doaj.org/toc/2193-3081; https://doaj.org/toc/1399-1183 |
| DOI: | 10.5194/we-18-7-2018 |
| URL الوصول: | https://doaj.org/article/60a8ac6f2c884ec8b9fedf7810cccc2e |
| رقم الأكسشن: | edsdoj.60a8ac6f2c884ec8b9fedf7810cccc2e |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 21933081 13991183 |
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| DOI: | 10.5194/we-18-7-2018 |