title: Comparative analysis of Solanum stoloniferum responses to probing by the green peach aphid Myzus persicae and the potato aphid Macrosiphum euphorbiae.
abstract: Plants protect themselves against aphid attacks by species-specific defense mechanisms. Previously, we have shown that Solanum stoloniferum Schlechtd has resistance factors to Myzus persicae Sulzer (Homoptera: Aphididae) at the epidermal/mesophyll level that are not effective against Macrosiphum euphorbiae Thomas (Homoptera: Aphididae). Here, we compare the nymphal mortality, the pre-reproductive development time, and the probing behavior of M. persicae and M. euphorbiae on S. stoloniferum and Solanum tuberosum L. Furthermore, we analyze the changes in gene expression in S. stoloniferum 96 hours post infestation by either aphid species. Although the M. euphorbiae probing behavior shows that aphids encounter more probing constrains on phloem activities-longer probing and salivation time- on S. stoloniferum than on S. tuberosum, the aphids succeeded in reaching a sustained ingestion of phloem sap on both plants. Probing by M. persicae on S. stoloniferum plants resulted in limited feeding only. Survival of M. euphorbiae and M. persicae was affected on young leaves, but not on senescent leaves of S. stoloniferum. Infestation by M. euphorbiae changed the expression of more genes than M. persicae did. At the systemic level both aphids elicited a weak response. Infestation of S. stoloniferum plants with a large number of M. persicae induced morphological changes in the leaves, leading to the development of pustules that were caused by disrupted vascular parenchyma and surrounding tissue. In contrast, an infestation by M. euphorbiae had no morphological effects. Both plant species can be regarded as good host for M. euphorbiae, whereas only S. tuberosum is a good host for M. persicae and S. stoloniferum is not. Infestation of S. stoloniferum by M. persicae or M. euphorbiae changed the expression of a set of plant genes specific for each of the aphids as well as a set of common genes.
authors: Laboratory of Entomology, Wageningen University, P.O. Box 8031, 6700 EH Plant Breeding, Wageningen UR, P.O. Box 386, 6700 AA Wageningen, The Netherlands.
authors: Adriana E
authors: AE
authors: Alvarez
authors: Viviana G
authors: VG
authors: Broglia
authors: Anahí M
authors: AM
authors: Alberti D'Amato
authors: Doret
authors: D
authors: Wouters
authors: Edwin
authors: E
authors: van der Vossen
authors: Elisa
authors: E
authors: Garzo
authors: W Fred
authors: WF
authors: Tjallingii
authors: Marcel
authors: M
authors: Dicke
authors: Ben
authors: B
authors: Vosman
mesh_terms: D000818:Animals; D001042:Aphids; D001522:Behavior, Animal; D018506:Gene Expression Regulation, Plant; D018515:Plant Leaves / Q000235:genetics; D032322:Solanum / Q000235:genetics*; D014158:Transcription, Genetic
keywords: Solanum tuberosum; cDNA microarrays; electrical penetration graph; insect-plant interactions; wild potato