A5081314782- Genomics, phytochemicals, and oxidative stress
- Insect Pest Control Strategies
- Moringa oleifera research and applications
- Insect Resistance and Genetics
- Insect and Pesticide Research
- Polysaccharides and Plant Cell Walls
- Plant Parasitism and Resistance
- Free Radicals and Antioxidants
- Legume Nitrogen Fixing Symbiosis
- Viral Infectious Diseases and Gene Expression in Insects
- Insect-Plant Interactions and Control
- Plant-Microbe Interactions and Immunity
- Energy and Environment Impacts
- Insect Utilization and Effects
Max Planck Institute for Chemical Ecology
2016-2023
Myrosinase enzymes play a key role in the chemical defense of plants order Brassicales. Upon herbivory, myrosinases hydrolyze β-S-linked glucose moiety glucosinolates, characteristic secondary metabolites brassicaceous plants, which leads to formation different toxic hydrolysis products. The specialist flea beetle, Phyllotreta armoraciae , is capable accumulating high levels glucosinolates body and can thus at least partially avoid plant myrosinase activity. In feeding experiments with...
The cabbage stem flea beetle (Psylliodes chrysocephala) is a key pest of oilseed rape in Europe, and specialized to feed on Brassicaceae plants armed with the glucosinolate-myrosinase defense system. Upon tissue damage, β-thioglucosidase enzyme myrosinase hydrolyzes glucosinolates (GLS) form toxic isothiocyanates (ITCs) which deter non-adapted herbivores. Here, we show that P. chrysocephala selectively sequester GLS from their host store these throughout life cycle. In addition, metabolize...
Abstract Several insect species have evolved two‐component chemical defences that enable the rapid release of deterrent or toxic metabolites upon predator attack. However, whether these vary across ontogeny and how this affects predation risk different life stages has rarely been addressed. The horseradish flea beetle Phyllotreta armoraciae possesses a defence consists sequestered glucosinolates an myrosinase capable converting non‐toxic to isothiocyanates. Here, we show levels only varied...
The horseradish flea beetle Phyllotreta armoraciae exclusively feeds on Brassicaceae, which contain glucosinolates as characteristic defense compounds. Although are usually degraded by plant enzymes (myrosinases) to toxic isothiocyanates after ingestion, P. beetles sequester glucosinolates. Between and within brassicaceous plants, the glucosinolate content composition can differ drastically. But how do these factors influence sequestration in armoraciae? To address this question, we...
Abstract As fundamentally different as phytopathogenic microbes and herbivorous insects are, they enjoy plant‐based diets. Hence, encounter similar challenges to acquire nutrients. Both beetles possess polygalacturonases (PGs) that hydrolyze the plant cell wall polysaccharide pectin. Countering these threats, proteins inhibit PGs of microbes, thereby lowering their infection rate. Whether PG‐inhibiting (PGIPs) play a role in defense against is unknown. To investigate significance PGIPs...
β-Glucosidases play an important role in the chemical defense of many insects by hydrolyzing and thereby activating glucosylated pro-toxins that are either synthesized de novo or sequestered from insect's diet. The horseradish flea beetle, Phyllotreta armoraciae, sequesters pro-toxic glucosinolates its brassicaceous host plants possesses endogenous β-thioglucosidase enzymes, known as myrosinases, for glucosinolate activation. Here, we identify three myrosinase genes P. armoraciae (PaMyr)...
β-Glucosidases play an important role in the chemical defense of many insects by hydrolyzing and thereby activating glucosylated pro-toxins that are either synthesized de novo or sequestered from diet. The horseradish flea beetle, Phyllotreta armoraciae, sequesters pro-toxic glucosinolates its brassicaceous host plants possesses endogenous β-thioglucosidase enzymes, known as myrosinases, for glucosinolate activation. Here, we identify three myrosinase genes P. armoraciae (PaMyr) with...
Abstract Glucosinolates, the characteristic secondary metabolites of Brassicales, are hydrolyzed upon herbivory by myrosinases to toxic and deterrent defense metabolites. The specialist flea beetle, Phyllotreta armoraciae , sequesters glucosinolates in body despite myrosinase activity, but it is unknown whether plant activity influences sequestration how beetles prevent hydrolysis ingested glucosinolates. In feeding experiments performed with myrosinase-deficient Arabidopsis thaliana...