A5068391722- Insect-Plant Interactions and Control
- Plant Parasitism and Resistance
- Plant and animal studies
- Insect and Pesticide Research
- Plant biochemistry and biosynthesis
- Plant Molecular Biology Research
- Plant-Microbe Interactions and Immunity
- Plant Virus Research Studies
- Acute Kidney Injury Research
- Plant tissue culture and regeneration
- Insect Resistance and Genetics
- Dialysis and Renal Disease Management
- Plant Reproductive Biology
- Allelopathy and phytotoxic interactions
- Plant Stress Responses and Tolerance
- Plant Gene Expression Analysis
- Photosynthetic Processes and Mechanisms
- Light effects on plants
- Transgenic Plants and Applications
- Legume Nitrogen Fixing Symbiosis
- Insect Pest Control Strategies
- Sepsis Diagnosis and Treatment
- Renal function and acid-base balance
- Hemodynamic Monitoring and Therapy
- Mycorrhizal Fungi and Plant Interactions
Max Planck Institute for Chemical Ecology
2016-2025
Austin Hospital
2011-2024
Max Planck Society
2009-2023
John Innes Centre
2023
University of Zurich
2023
Craft Engineering Associates (United States)
2022-2023
Ecological Society of America
2019
John Wiley & Sons (United States)
2019
Institute for Biodiversity
2019
University of Münster
2019
Herbivore attack is known to increase the emission of volatiles, which attract predators herbivore-damaged plants in laboratory and agricultural systems. We quantified volatile emissions from Nicotiana attenuata growing natural populations during by three species leaf-feeding herbivores mimicked release five commonly emitted volatiles individually. Three compounds ( cis-3 -hexen-1-ol, linalool, cis -α-bergamotene) increased egg predation rates a generalist predator; linalool complete blend...
Herbivore attack is widely known to reduce food quality and increase chemical defenses other traits responsible for herbivore resistance. Inducible are commonly thought allow plants forgo the costs of defense when not needed; however, neither their defensive function (increasing a plant's fitness) nor cost-savings have been demonstrated in nature. The root-produced toxin nicotine increases after native, postfire annual Nicotiana attenuata internally activated by wound hormone, jasmonic acid....
Summary Recent studies on jasmonic acid (JA) biosynthetic mutants have shown that jasmonates play essential roles in pollen maturation and dehiscence wound‐induced defence against biotic attacks. To better understand the mechanisms of this plant hormone, we isolated an Arabidopsis knock‐out mutant defective JA gene CYP74A ( allene oxide synthase , AOS ) using reverse genetics screening methods. This enzyme catalyses dehydration hydroperoxide to unstable pathway. Endogenous levels, which...
Potted poplar ramets showed increased concentrations and rates of synthesis phenolic compounds within 52 hours having 7 percent their leaf area removed by tearing, as did undamaged plants sharing the same enclosure. Damaged sugar maple seedlings responded in a manner similar to that damaged poplars. Nearby maples had levels phenolics hydrolyzable condensed tannin 36 hours, but exhibited no change synthesis. An airborne cue originating tissues may stimulate biochemical changes neighboring...
We transformed the native tobacco, Nicotiana attenuata, to silence its lipoxygenase, hydroperoxide lyase, and allene oxide synthase genes in order inhibit oxylipin signaling, known mediate plant's direct indirect defenses. When planted into habitats, lipoxygenase-deficient plants were more vulnerable N. attenuata's adapted herbivores but also attracted novel herbivore species, which fed reproduced successfully. In addition highlighting value of genetically silencing study ecological...
Abstract Feeding by the tobacco specialist Manduca sexta(Lepidoptera, Sphingidae) and application of larval oral secretions regurgitant (R) to mechanical wounds are known elicit: (a) a systemic release mono- sesquiterpenes, (b) jasmonate burst, (c) R-specific changes in transcript accumulation putatively growth- defense-related mRNAs Nicotiana attenuata Torr. ex Wats. We identified several fatty acid-amino acid conjugates (FACs) R M. sexta closely related species quinquemaculata which, when...
Plants produce metabolites that directly decrease herbivore performance, and as a consequence, herbivores are selected for resistance to these metabolites. To determine whether actually function defenses requires measuring the performance of plants altered only in production certain metabolite. date, defensive value most plant traits has not been demonstrated nature. We transformed native tobacco(Nicotiana attenuata) with consensus fragment its two putrescine N-methyl transferase (pmt) genes...
Abstract When Manduca sexta attacks Nicotiana attenuata, fatty acid-amino acid conjugates (FACs) in the larvae's oral secretions (OS) are introduced into feeding wounds. These FACs trigger a transcriptional response that is similar to induced by insect damage. Using two-dimensional gel electrophoresis, matrix-assisted laser desorption ionization-time of flight, and liquid chromatography-tandem mass spectrometry, we characterized proteins phenolic extracts nuclear fraction leaves elicited...
Leaves of red oak trees that had been defoliated by gypsy moth larvae during the previous year and again period study higher values tanning coefficients, total phenolics, hydrolyzable condensed tannins, dry matter contents, toughness than did leaves undamaged trees. These changes may influence larval growth alter course further outbreaks.
Abstract Mitogen-activated protein kinase (MAPK) signaling plays a central role in transducing extracellular stimuli into intracellular responses, but its mediating plant responses to herbivore attack remains largely unexplored. When Manduca sexta larvae their host plant, Nicotiana attenuata, the plant's wound response is reconfigured at transcriptional, phytohormonal, and defensive levels due introduction of oral secretions (OS) wounds during feeding. We show that OS dramatically amplify...
Significance Plant roots associate with the diverse microbial community in soil and can establish mutualistic relationships microbes. The genetic characterization of plant microbiome (total microbiota plants) has intensified, but we still lack experimental proof ecological function root microbiome. Without such an understanding, use communities sustainable agricultural practices will be poorly informed. Through continuous cropping a seed-sterilized native plant, inadvertently recapitulated...
Plants use many means to attract pollinators, including visual cues and odor. We investigated how nonpigment floral chemistry influences nectar removal, visitation, florivory, rates of outcrossing, fitness through both male female functions. blocked expression biosynthetic genes the dominant attractant [benzyl acetone ( Nachal1 )] repellent [nicotine Napmt1/2 in all combinations native tobacco Nicotiana attenuata measured their effects on plants habitat. Both were required maximize capsule...
Herbivore attack elicits costly defenses that are known to decrease plant fitness by using resources normally slated for growth and reproduction. Additionally, plants have evolved mechanisms tolerating attack, which not understood on a molecular level. Using 11 C-photosynthate labeling as well sugar enzyme measurements, we found rapid changes in sink–source relations the annual Nicotiana attenuata after simulated herbivore attacks, increased allocation of sugars roots. This herbivore-induced...