Exceptional plant penetration and feeding upon cortical parenchyma cells by the woolly poplar aphid

Autor: Yvan Rahbé, Sophie Pointeau, François Lieutier, Arnaud Ameline, Aurélien Sallé, Stéphanie Bankhead-Dronnet, Françoise Laurans
Přispěvatelé: Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), Institut National de la Recherche Agronomique (INRA)-Université d'Orléans (UO), Ecologie et Dynamique des Systèmes Anthropisés (EDYSAN), Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon, An algorithmic view on genomes, cells, and environments (BAMBOO), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), Ecologie et Dynamique des Systèmes Anthropisés - UMR CNRS 7058 (EDYSAN), French Ministry of Agriculture, Food and Fisheries (MAAP), French Ministry of Research and Education
Jazyk: angličtina
Rok vydání: 2012
Předmět:
Zdroj: Journal of Insect Physiology
Journal of Insect Physiology, Elsevier, 2012, 58 (6), pp.857-66. ⟨10.1016/j.jinsphys.2012.03.008⟩
Journal of Insect Physiology, 2012, 58 (6), pp.857-66. ⟨10.1016/j.jinsphys.2012.03.008⟩
ISSN: 0022-1910
DOI: 10.1016/j.jinsphys.2012.03.008⟩
Popis: International audience; Forty percent of aphids live wholly or partly on trees, most species being associated with leaves or petioles. Species able to exploit woody parts have either specific adaptations, such as extra long stylets that allow them to reach the phloem, or the ability to induce galls. The woolly poplar aphid, Phloeomyzus passerinii (Signoret) (Hemiptera: Aphididae), colonizes the trunks and base of the lower branches of mature poplars and causes cortical necrosis leading to the death of trees where infestation is heavy. Very little is known about the mode of feeding of P. passerinii. This study looked at the feeding behavior of P. passerinii on stem-cuttings of Populus x canadensis Moench using: (i) histological analyses of the feeding site and stylet pathway and (ii) electrical penetration graphs (EPG, DC) based on parthenogenetic apterous females on woody tissues. The histological and EPG results showed that stylets of P. passerinii penetrated into the plant tissues following a straight unbranched extracellular and intracellular pathway to reach the cortical parenchyma. Compared to EPGs for phloem sap feeding aphids, there were differences in the waveforms A and C whereas a new waveform Icp was described. Based on histological analyses and previous descriptions of EPG waveforms, correlations with the stylet tip position and aphid activities within bark tissues are discussed. A pathway and a sustained intracellular phase were distinguished, both occurring in the cortical parenchyma cells. The bark aphid feeding mode is discussed in relation to the damage caused and in terms of changes in the aphid's diet.
Databáze: OpenAIRE
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