The research reported in this thesis describes the induction of proteinase inhibitor synthesis in solanaceous plants (tobacco and tomato), when lepidopteran larvae (Manduca sexta and Spodoptera exigua) are feeding on leaves. It is shown that the larvae circumvent the proteinase inhibitor defense of these plants by the induction of non-susceptible g...
Hordeum chilense is a perennial species occurring in Chile and Argentina. This wild barley species shows a very wide range of variation of morphological and agronomic characters and crosses easily with other members of the Triticeae tribe.H. chilense is one of the five wild barley species in which avoidance of rust fungi as been reported. The avoid...
The thesis describes: 1)Resistance mechanism of tomato and some other crop plant species against O. lycopersici , a causal agent of the recent outbreaks of tomato powdery mildew; 2) Host range and genetic variation of the pathogen; 3) Inheritance analysis of resistance in wild tomato accessions including L. hirsutum G1.1560 and G1.1290, L. parviflo...
Tropical shrimp culture is one of the fastest growing aquaculture sectors in the world. Since this production sector is highly affected by infectious pathogens, disease control is nowadays a priority. Effective prevention methods can be developed more efficiently when quantitative assays for the evaluation and monitoring of the health status of shr...
Many plant species are known to defend themselves against herbivorous insects indirectly, by producing volatiles in response to herbivory. These volatiles attract carnivorous enemies of the herbivores, such as parasitoids. Research on the model plant Arabidopsis thaliana (L.) Heynh. (Brassicaceae) has contributed considerably to the unravelling of ...
The outcome of a plant-pathogen interaction is determined by both the presence of resistance ( R ) genes in the plant and matching avirulence ( Avr ) genes in the pathogen. According to the gene-for-gene concept, for a dominant R gene in the host plant resistant to a specific strain of a pathogen, a corresponding dominant Avr gene exists in that st...
Oidium neolycopersiciis the causal agent of the tomato powdery mildew disease. Besides a few recently released resistant cultivars, all tomato cultivars are susceptible to O. neolycopersici. Therefore, resistance to O. neolycopersici is an important trait in tomato breeding.The aim of this research is to study theinteraction between tomato ( Lycope...
Beschrijving van onderzoek om fundamenteel inzicht te verkrijgen in het infectieproces van de necrotrofe schimmel Botrytis: door beschikbaarheid van fytotoxische eiwitten van de schimmel kunnen planten worden gescreened op botrytisresistentie, zonder dat daarbij gebruik gemaakt hoeft te worden van slecht reproduceerbare ziektetoetsen
Diverse bodembacteriën kunnen de plantenontwikkeling bevorderen en de plant weerbaarder maken tegen suboptimale condities. Onderzocht werden hoe preparaten van azospirillum brasilense en bacillus subtilis gebruikt kunnen worden tegen abiotische en biotische stress
Is het mogelijk aardappelrassen met verschillende resistentiegenen tegen Meloidogyne spp. in te zeteen, als onderdeel van een geïntegreerde beheersingstrategie ter vermindering van het gebruik van ontsmettingsmiddelen door bestudering vererving van resistentiegenen, ontwikkelen van selectiemerkers, isoleren van resistentiegenen en het introduceren ...
