دورية أكاديمية
Do metal-rich plants deter herbivores? A field test of the defence hypothesis.
| العنوان: | Do metal-rich plants deter herbivores? A field test of the defence hypothesis. |
|---|---|
| المؤلفون: | Noret, Nausicaa, Meerts, Pierre Jacques, Vanhaelen, Mathieu, Dos Santos, Anabelle, Escarre Blanch, José |
| المصدر: | Oecologia, 152 (1 |
| سنة النشر: | 2007 |
| المجموعة: | DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
| مصطلحات موضوعية: | Sciences bio-médicales et agricoles, Animals, Feeding Behavior -- drug effects, Gastropoda -- drug effects, Gastropoda -- physiology, Glucosinolates -- metabolism, Glucosinolates -- pharmacology, Plant Leaves -- metabolism, Plant Leaves -- parasitology, Population Density, Thlaspi -- metabolism, Thlaspi -- parasitology, Zinc -- metabolism, Zinc -- pharmacology, Glucosinolates, Thlaspi caerulescens, Zinc hyperaccumulation |
| الوصف: | Some plant species growing on metalliferous soils are able to accumulate heavy metals in their shoots up to very high concentrations, but the selective advantage of this behaviour is still unknown. The most popular hypothesis, that metals protect plants against herbivores, has been tested several times in laboratory conditions, with contradictory results. We carried out the first large-scale test of the defence hypothesis in eight natural populations of the model Zn hyperaccumulator Thlaspi caerulescens J. and C. Presl (Brassicaceae). In two climatic regions (temperate, Belgium-Luxembourg, and Mediterranean, southern France), we worked in metalliferous and in normal, uncontaminated environments, with plants spanning a wide range of Zn concentrations. We also examined the importance of glucosinolates (main secondary metabolites of Brassicaceae) as antiherbivore defences. When exposed to natural herbivore populations, T. caerulescens suffered lower herbivory pressures in metal-enriched soils than in normal soils, both in Belgium-Luxembourg and in southern France. The trapping of gastropods shows an overall lower population density in metalliferous compared to normal environments, which suggests that herbivory pressure from gastropods is lower on metalliferous soils. In addition, foliar concentration of glucosinolates was constitutively lower in all populations from metal-enriched soils, suggesting that these have evolved towards lower investment in organic defences in response to lower herbivory pressure. The Zn concentration of plants had a protective role only for Belgian metallicolous plants when transplanted in normal soils of Luxembourg. These results do not support the hypothesis that Zn plays a key role in the protection of T. caerulescens against enemies. In contrast, glucosinolates appear to be directly involved in the defence of this hyperaccumulator against herbivores. ; Journal Article ; Research Support, Non-U.S. Gov't ; SCOPUS: ar.j ; info:eu-repo/semantics/published |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | 2 full-text file(s): application/pdf | application/pdf |
| اللغة: | English |
| العلاقة: | uri/info:doi/10.1007/s00442-006-0635-5; uri/info:pmid/17216212; uri/info:scp/34247341694; https://dipot.ulb.ac.be/dspace/bitstream/2013/67724/2/NoretTest et al 2007 herbivorie terrain.pdf; https://dipot.ulb.ac.be/dspace/bitstream/2013/67724/1/NoretTest et al 2007 Oecologia.pdf; http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/67724Test |
| الإتاحة: | http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/67724Test https://dipot.ulb.ac.be/dspace/bitstream/2013/67724/2/NoretTest et al 2007 herbivorie terrain.pdf https://dipot.ulb.ac.be/dspace/bitstream/2013/67724/1/NoretTest et al 2007 Oecologia.pdf |
| رقم الانضمام: | edsbas.E02187D1 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |