| Title: | Pathogen-Mediated Tritrophic Interactions: Baculovirus-Challenged Caterpillars Induce Higher Plant Defenses than Healthy Caterpillars |
| Author(s): | Pan Q; Shikano I; Hoover K; Liu TX; Felton GW; |
| Address: | "State Key Laboratory of Crop Stress Biology for Arid Areas, and Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, China. panqinjian123@163.com. Department of Entomology and Center for Chemical Ecology, Pennsylvania State University, University Park, PA, 16802, USA. panqinjian123@163.com. Department of Entomology and Center for Chemical Ecology, Pennsylvania State University, University Park, PA, 16802, USA. State Key Laboratory of Crop Stress Biology for Arid Areas, and Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, China. txliu@nwsuaf.edu.cn" |
| DOI: | 10.1007/s10886-019-01077-1 |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Linking) |
| Abstract: | "Although the tritrophic interactions of plants, insect herbivores and their natural enemies have been intensely studied for several decades, the roles of entomopathogens in their indirect modulation of plant-insect relationships is still unclear. Here, we employed a sublethal dose of a baculovirus with a relatively broad host range (AcMNPV) to explore if feeding by baculovirus-challenged Helicoverpa zea caterpillars induces direct defenses in the tomato plant. We examined induction of plant defenses following feeding by H. zea, including tomato plants fed on by healthy caterpillars, AcMNPV-challenged caterpillars, or undamaged controls, and subsequently compared the transcript levels of defense related proteins (i.e., trypsin proteinase inhibitors, peroxidase and polyphenol oxidase) and other defense genes (i.e., proteinase inhibitor II and cysteine proteinase inhibitor) from these plants, in addition to comparing caterpillar relative growth rates. As a result, AcMNPV-challenged caterpillars induced the highest plant anti-herbivore defenses. We examined several elicitors and effectors in the secretions of these caterpillars (i.e., glucose oxidase, phospholipase C, and ATPase hydrolysis), which surprisingly did not differ between treatments. Hence, we suggest that the greater induction of plant defenses by the virus-challenged caterpillars may be due to differences in the amount of these secretions deposited during feeding or to some other unknown factor(s)" |
| Keywords: | "Animals Baculoviridae/*pathogenicity Catechol Oxidase/genetics/metabolism Feeding Behavior Gene Expression Regulation, Plant Herbivory Host-Parasite Interactions Larva/drug effects/physiology/virology Solanum lycopersicum/*metabolism/parasitology Moths/gr;" |
| Notes: | "MedlinePan, Qinjian Shikano, Ikkei Hoover, Kelli Liu, Tong-Xian Felton, Gary W eng IOS-1645548/National Science Foundation (US)/ NSERC PDF-488105-2016/Natural Sciences and Engineering Research Council of Canada Postdoctoral Fellowship/ 201506300111/China Scholarship Council/ 2019/05/28 J Chem Ecol. 2019 Jun; 45(5-6):515-524. doi: 10.1007/s10886-019-01077-1. Epub 2019 May 25" |
