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| Author(s): |
Kamila Ferreira Massuda
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia |
| Defense date: | 2015-06-02 |
| Examining board members: |
José Roberto Trigo;
João Vasconcellos Neto;
Fernando Antônio Frieiro Costa;
Paula Munhoz Omena;
Thiago Gonçalves Souza
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| Advisor: | José Roberto Trigo |
| Abstract | |
The interactions between herbivorous insects and plants have been shaped over a co-evolutionary process that spawned adaptations of plants to avoid herbivory and counter adaptation of herbivores to overcome the defenses imposed by plants. The plant Ipomoea carnea subsp. fistulosa (Convolvulaceae) has as herbivores, beetles of Cassidinae subfamily (Chelymorpha reimoseri, Chelymorpha cribraria, and Charidotella rubicunda), which use the leaves to feed larvae and adults, as well as places for depositing their eggs. This study demonstrated the efficiency of two I. carnea defensive mechanisms against oviposition by C. reimoseri: (1) the detachment of eggs neoplasm formation, below the eggs, and (2) the attraction of eggs parasitoids by volatile released from posture-induced plants and plants induced by an individual capable of laying eggs, a mated female. Furthermore, we demonstrated the effectiveness of two defensive strategies in the three above mentioned cassidine species; (1) the unpalatability, due to swainsonine, an akaloid provided by the host plant, and its deterrent effect against predator, the chicken Gallus gallus; (2) the chemical camouflage of C. reimoseri larvae on its host plant, due to high chemical similarity among their cuticular compounds that turns difficult recognition by a chemical oriented predator (AU) | |
| FAPESP's process: | 08/04241-4 - Multimodal defenses in Ipomoea carnea subsp. fistulosa (Convolvulaceae) and in their herbivores, the tortoise beetles (Chrysomelidae) |
| Grantee: | Kamila Ferreira Massuda Garcia |
| Support Opportunities: | Scholarships in Brazil - Doctorate |