Lett Jean-Michel, Granier Martine, Grondin Martial, Turpin Patrick, Molinaro Frank, Chiroleu Frédéric, Peterschmitt Michel, Reynaud Bernard.
2001. Electrical penetration graphs from Cicadulina mbila on maize, the fine structure of its stylet pathways and consequences for virus transmission efficiency.
In : 3rd International Geminivirus Symposium, Norwich , Grande-Bretagne, 24-28 July 2001. AAB
Résumé : Five distinct electrical penetration graph waveforms characterising the feeding behaviour of the leafhopper Cicadulina mbila Naude (Homoptera: Cicadellidae) on maize (Zea mays L.) were obtained using a DC based system. The waveforms were distinguished by spectral features and by statistical analysis of their median voltages, durations and time to first waveform recording. By changing the polarity of the system voltage and the level of the input resistor it was shown that the waveforms are mainly determined by the electromotive force (emf) component. Based on the correlation between waveforms and the fine structure of the stylet pathways observed by transmission electron rnicroscopy, insect's activities have been associated with five waveforms: stylet pathway formation (waveform 1), active ingestion (waveform 2), putative stylet work (waveform 3), salivation (waveform 4) and passive ingestion (waveform 5). Like waveform E1 and E2 of aphids, waveforms 4 and 5 of C. mbila correspond to feeding activities in sieve tubes. However, unlike aphids which probe briefly in non-vascular cells, waveform 2 corresponds to active ingestion in cells, where the cell content is partially ingested and hence the organelles' integrity severely affected. These observations suggest that this specific feeding feature. typical of leafhoppers, determines their ability to acquire gerninivirus virions located in the plant cell nucleus.
Mots-clés Agrovoc : Cicadulina, vecteur de maladie, transmission des maladies, virus striure du maïs, comportement alimentaire
Mots-clés complémentaires : Cicadulina mbila
Classification Agris : L51 - Physiologie animale - Nutrition
H20 - Maladies des plantes
Auteurs et affiliations
- Lett Jean-Michel, CIRAD-AMIS-PROTECTION DES CULTURES (FRA)
- Granier Martine, CIRAD-AMIS-PROTECTION DES CULTURES (FRA)
- Grondin Martial, CIRAD-AMIS-PROTECTION DES CULTURES (REU)
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Turpin Patrick, CIRAD-AMIS-PROTECTION DES CULTURES (REU)
ORCID: 0000-0002-4008-6975
- Molinaro Frank, Université de la Réunion (REU)
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Chiroleu Frédéric, CIRAD-AMIS-PROTECTION DES CULTURES (REU) ORCID: 0000-0002-4874-5357
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Peterschmitt Michel, CIRAD-AMIS-PROTECTION DES CULTURES (FRA) ORCID: 0000-0001-8709-9418
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Reynaud Bernard, CIRAD-AMIS-PROTECTION DES CULTURES (REU) ORCID: 0009-0003-6403-3944
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/479848/)
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