| Title: | Aphid (Myzus persicae) feeding on the parasitic plant dodder (Cuscuta australis) activates defense responses in both the parasite and soybean host |
| Author(s): | Zhuang H; Li J; Song J; Hettenhausen C; Schuman MC; Sun G; Zhang C; Li J; Song D; Wu J; |
| Address: | "Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China. University of Chinese Academy of Sciences, Beijing, 100049, China. Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knoll-Strasse 8, Jena, 07745, Germany. Department of Entomology, China Agricultural University, Beijing, 100193, China" |
| ISSN/ISBN: | 1469-8137 (Electronic) 0028-646X (Linking) |
| Abstract: | "Dodders (Cuscuta spp.) are shoot holoparasites, whose haustoria penetrate host tissues to enable fusion between the parasite and host vascular systems, allowing Cuscuta to extract water, nutrients and other molecules from hosts. Aphids are piercing-sucking herbivores that use specialized stylets to feed on phloem sap. Aphids are known to feed on Cuscuta, but how Cuscuta and its host plant respond to aphids attacking the parasite was unknown. Phytohormone quantification, transcriptomic analysis and bioassays were performed to determine the responses of Cuscuta australis and its soybean (Glycine max) hosts to the feeding of green peach aphid (GPA; Myzus persicae) on C. australis. Decreased salicylic acid levels and 172 differentially expressed genes (DEGs) were found in GPA-attacked C. australis, and the soybean hosts exhibited increased jasmonic acid contents and 1015 DEGs, including > 100 transcription factor genes. Importantly, GPA feeding on C. australis increased the resistance of the soybean host to subsequent feeding by the leafworm Spodoptera litura and soybean aphid Aphis glycines, resulting in 21% decreased leafworm mass and 41% reduced aphid survival rate. These data strongly suggest that GPA feeding on Cuscuta induces a systemic signal, which is translocated to hosts and activates defense against herbivores" |
| Keywords: | "Animals Aphids/drug effects/*physiology Cuscuta/drug effects/genetics/*immunology/*parasitology Cyclopentanes/metabolism *Feeding Behavior/drug effects Gene Expression Regulation, Plant/drug effects Herbivory/drug effects *Host-Pathogen Interactions/drug;" |
| Notes: | "MedlineZhuang, Huifu Li, Juan Song, Juan Hettenhausen, Christian Schuman, Meredith C Sun, Guiling Zhang, Cuiping Li, Jing Song, Dunlun Wu, Jianqiang eng Research Support, Non-U.S. Gov't England 2018/03/27 New Phytol. 2018 Jun; 218(4):1586-1596. doi: 10.1111/nph.15083. Epub 2018 Mar 25" |
