La fonction myrmécophile deCecropia obtusaTrecul (Cecropiaceae) en Guyane française
| Autor: | Jean-Renaud Robin, Marie-Claire Touzet, Monique Belin-Depoux, Pascal-Jean Solano, Christian Lubrano, Philippe Chouteau |
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| Rok vydání: | 1997 |
| Předmět: | |
| Zdroj: | Acta Botanica Gallica. 144:289-313 |
| ISSN: | 2166-3408 1253-8078 |
| DOI: | 10.1080/12538078.1997.10515375 |
| Popis: | Summary Cecropia obtusa Trecul is a myrmecophytic plant associated in a strict relation with the ants Azteca (A. alfari Emery and A. traili Emery). The ants inhabit the internodes of the tree and feed on nutritive bodies or mullerian bodies. These multicellular corpuscles are produced on the abaxial face of the base of the petiole. This region is covered with a velutinous mat of multicellular but uniseried trichomes called trichilium. The production activity of mullerian bodies and the activity of the ants are synchronous: three hours before the sundown. A Phycitinae caterpillar may occupy the Cecropia internodes and consumes mullerian bodies exclusively. A fungus, Fusarium moniliforme, grows on the trichilium in the absence of ants. The distribution of Cecropia obtusa is homogeneous in space and time but its growth is under control of topographic, edaphic and climatic factors. The comparison between trees occupied by ants and inoccupied ones shows that these last ones grow less quickly and that the mulle... |
| Databáze: | OpenAIRE |
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