A5024834878- Insect-Plant Interactions and Control
- Plant Parasitism and Resistance
- Plant and animal studies
- Insect and Pesticide Research
- Plant Virus Research Studies
- Environmental Toxicology and Ecotoxicology
- Insect symbiosis and bacterial influences
- Forest Insect Ecology and Management
- Insect Resistance and Genetics
- Plant biochemistry and biosynthesis
- Plant Stress Responses and Tolerance
- Plant-Microbe Interactions and Immunity
- Ecology and Vegetation Dynamics Studies
- Biological Control of Invasive Species
- Animal Ecology and Behavior Studies
- Plant responses to elevated CO2
- Insect Pest Control Strategies
- Allelopathy and phytotoxic interactions
- Study of Mite Species
- Insect and Arachnid Ecology and Behavior
- Cardiovascular Health and Risk Factors
- Fire effects on ecosystems
- Urological Disorders and Treatments
- Genetic and Environmental Crop Studies
- Phytochemical compounds biological activities
University of Amsterdam
2015-2024
Institute for Biodiversity
2014-2024
Amphia Ziekenhuis
2023
Amsterdam University of the Arts
2015
Max Planck Society
2007-2010
Max Planck Institute for Chemical Ecology
2007-2008
Abstract Through a combined metabolomics and transcriptomics approach we analyzed the events that took place during first 5 d of infesting intact tomato (Lycopersicon esculentum) plants with spider mites (Tetranychus urticae). Although had caused little visible damage to leaves after 1 d, they already induced direct defense responses. For example, proteinase inhibitor activity doubled transcription genes involved in jasmonate-, salicylate-, ethylene-regulated defenses been activated. On day...
Abstract The tomato (Lycopersicon esculentum) mutant def-1, which is deficient in induced jasmonic acid (JA) accumulation upon wounding or herbivory, was used to study the role of JA direct and indirect defense responses phytophagous mites (Tetranychus urticae). In contrast earlier reports, spider laid as many eggs caused much damage on def-1 wild-type plants, even though lacked induction proteinase inhibitor activity. However, hatching-rate significantly higher, suggesting that JA-dependent...
Abstract Wound signaling pathways in plants are mediated by mitogen-activated protein kinases (MAPKs) and stress hormones, such as ethylene jasmonates. In Arabidopsis thaliana, the transmission of wound signals MAPKs has been subject detailed investigations; however, involvement specific phosphatases is not known. Here, we show that AP2C1, an Ser/Thr phosphatase type 2C, a novel signal regulator inactivates stress-responsive MPK4 MPK6. Mutant ap2c1 produce significantly higher amounts...
Ecology Letters (2011) 14: 229–236 Phytopathogens and herbivores induce plant defences. Whereas there is evidence that some pathogens suppress these defences by interfering with signalling pathways involved in the defence, such scarce for herbivores. We found invasive spider mite Tetranychus evansi suppresses induction of salicylic acid jasmonic routes induced tomato. This was reflected levels inducible defence compounds, as proteinase inhibitors, which mite-infested plants were reduced to...
Tomato breeding has been tremendously efficient in increasing fruit quality and quantity but did not focus on improving herbivore resistance. The biosynthetic pathway for the production of 7-epizingiberene a wild tomato was introduced into cultivated greenhouse variety with aim to obtain 7-Epizingiberene is specific sesquiterpene toxic repellent properties that produced stored glandular trichomes. We identified synthase (ShZIS) belongs new class synthases, exclusively using...
Plants and herbivores are thought to be engaged in a coevolutionary arms race: rising frequencies of plants with anti-herbivore defences exert pressure on resist or circumvent these vice versa. Owing its frequency-dependent character, the race hypothesis predicts that exhibit genetic variation for traits determine how they deal given host plant phenotype. Here, we show existence distinct within single herbivore species, spider mite Tetranychus urticae, lead resistance susceptibility...
Summary Plants respond to herbivory by mounting a defense. Some plant‐eating spider mites ( Tetranychus spp.) have adapted plant defenses maintain high reproductive performance. From natural populations we selected three mite strains from two species, urticae and evansi , that can suppress defenses, using fourth defense‐inducing strain as benchmark, assess which extent these differently. We characterized timing magnitude of phytohormone accumulation defense‐gene expression, determined if...
Spider mites (Tetranychidae sp.) are widely occurring arthropod pests on cultivated plants. Feeding by the two-spotted spider mite T. urticae, a generalist herbivore, induces defense response in plants that mainly depends phytohormones jasmonic acid and salicylic (SA). On tomato (Solanum lycopersicum), however, certain genotypes of urticae specialist species evansi were found to suppress these defenses. This phenomenon occurs downstream phytohormone accumulation via an unknown mechanism. We...
The two-spotted spider mite Tetranychus urticae is an extremely polyphagous crop pest. Alongside unparalleled detoxification potential for plant secondary metabolites, it has recently been shown that mites can attenuate or even suppress defenses. Salivary constituents, notably effectors, have proposed to play important role in manipulating defenses and might determine the outcome of plant-mite interactions. Here, proteomic composition saliva from T. lines adapted various host plants-bean,...
Plants have inducible defenses to combat attacking organisms. Hence, some herbivores adapted suppress these defenses. Suppression of plant has been shown benefit by boosting their growth and reproductive performance. We observed in field-grown tomatoes that spider mites (Tetranychus urticae) establish larger colonies on plants already infested with the tomato russet mite (Aculops lycopersici). Using laboratory assays, we a much higher performance mite-infested plants, similar jasmonic acid...
CORONATINE INSENSITIVE 1 (COI1) is a well-known key player in processes downstream of jasmonic acid (JA) biosynthesis: silencing COI1 Nicotiana attenuata (ir-coi1) makes plants insensitive to JA, prevents the up-regulation JA-mediated defenses and decreases plant's resistance herbivores pathogens. In agreement with previous studies, we observed that regulation several JA biosynthesis genes elicited by Manduca sexta oral secretions (OS) dependent. response wounding application OS ir-coi1...
Plants are nutritious and hence herbivores phytopathogens have specialized to attack consume them. In turn, plants evolved adaptations detect withstand these attacks. Such we call 'defenses' they can operate either directly between the plant consumer or indirectly i.e. when taking effect via other organisms such as predators parasitoids of herbivores. Plant defenses put selection pressure on plant-consumers and, a result, pathogens counter-adaptations avoid, resist, manipulate defenses. Here...
Tomato plants have their leaves, petioles and stems covered with glandular trichomes that protect the plant against two-spotted spider mites many other herbivorous arthropods, but also hinder searching by phytoseiid natural enemies of these herbivores. This trichome cover creates competitor-free enemy-free space for tomato russet mite (TRM) Aculops lycopersici (Acari: Eriophyidae), being so minute it can seek refuge feed inbetween on cultivars currently used in practice. Indeed, several...
The tomato russet mite, Aculops lycopersici, is among the smallest animals on earth. It a worldwide pest and can potently suppress host’s natural resistance. We sequenced its genome, first of an eriophyoid, explored whether there are genomic features associated with mite’s minute size lifestyle. At only 32.5 Mb, genome yet reported for any arthropod and, reminiscent microbial eukaryotes, exceptionally streamlined. has few transposable elements, tiny intergenic regions, remarkably...
Abstract Background Generalist herbivores such as the two-spotted spider mite Tetranychus urticae thrive on a wide variety of plants and can rapidly adapt to novel hosts. What traits enable polyphagous cope with diversity secondary metabolites in their variable plant diet is unclear. Genome sequencing T. revealed presence 17 genes that code for secreted proteins strong homology “intradiol ring cleavage dioxygenases (DOGs)” from bacteria fungi, phylogenetic analyses show they have been...
Plants possess various inducible defences that result in synthesis of specialized metabolites response to herbivory, which can interfere with the performance herbivores same and other species. Much less is known effects plant feeding by omnivores. We found previous omnivorous predator Macrolophus pygmaeus on sweet pepper plants significantly reduced reproduction two-spotted spider mite Tetranychus urticae western flower thrips Frankliniella occidentalis plants, also leaves had not been...
Abstract Many angiosperm plants, including basal dicots, eudicots, and monocots, emit (E,E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene, which is derived from geranyllinalool, in response to biotic challenge. An Arabidopsis (Arabidopsis thaliana) geranyllinalool synthase (GLS) belonging the e/f clade of terpene (TPS) family two Fabaceae GLSs that belong TPS-g have been reported, making it unclear main route plants. We characterized a tomato (Solanum lycopersicum) TPS-e/f gene, TPS46, encoding...
Whiteflies damage tomatoes mostly via the viruses they transmit. Cultivated lack many of resistances their wild relatives. In order to increase protection its major pest, whitefly Bemisia tabaci and transmitted Tomato Yellow Leaf Curl Virus (TYLCV), we introgressed a trichome-based resistance trait from tomato Solanum pimpinellifolium into cultivated tomato, lycopersicum. The backcross line BC5S2 contains acylsucrose-producing type-IV trichomes, unlike tomatoes, exhibits increased, yet...
Summary Spider mites are destructive arthropod pests on many crops. The generalist herbivorous mite Tetranychus urticae induces defenses in tomato ( Solanum lycopersicum ) and this constrains its fitness. By contrast, the Solanaceae‐specialist evansi maintains a high reproductive performance by suppressing defenses. outcompetes T. when infesting same plant, but it is unknown whether facilitated of plant. We assessed extent to which secondary infestation competitor affects local plant defense...