Selective acceptance of brassicaceous plants by the peach potato aphid Myzus persicae: a case study of Aurinia saxatilis
Journal Title: Acta Biologica - Year 2015, Vol 22, Issue 846
Abstract
The probing behavior of Myzus persicae (Sulz.) was examined on the ornamental plant Aurinia saxatilis (L.) Desv. that has not been known as a host of M. persicae in nature, and compared to the behavior on cultivated plants of the genus Brassica, B. rapa L. ssp. pekinensis L. and B. oleracea var. gongyloides, that are known hosts to this aphid. The purpose was to determine whether A. saxatilis can be exploited by M. persicae thus providing a potential refuge for the aphid population. The EPG (Elelctrical Penetration Graph) study demonstrated that on A. saxatilis, M. persicae showed mainly non-probing activities that occupied 70% of experimental time. The remaining time, which was probing, consisted mainly of pathway activities divided into numerous short probes not reaching beyond 1–2 cell layers and very few aphids reached phloem vessels. None aphid was able to ingest sap in a sustained way. In contrast, on Brassica plants, the probing of M. persicae was rarely interrupted, all aphids reached sieve elements elements and ingested sap for long and uninterrupted periods. It is postulated that high content of glucosinolates in the outer tissues of A. saxatilis leaves may be responsible for the termination of M. persicae probing at the very early stage, thus preventing the contact with vascular elements and the ingestion of phloem sap. In consequence, A. saxatilis is rejected as a host plant by M. persicae.
Authors and Affiliations
Tran Thi Hong Phuong, Anna Wróblewska-Kurdyk, Katarzyna Dancewicz, Beata Gabryś
Keywords
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- EP ID EP171310
- DOI DOI 10.18276/ab.2015.22-03
- Views 35
- Downloads 0
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