Applications of 2,4-D or MCPA may cause malformations in the initiated leaves of both grasses and cereals, during vegetative stages of development. 2,4,5-TP also caused malformations in stems and leaves, but only after the plants started to shoot. By their strong tillering the reaction of grasses to auxin herbicides was more complicated than that o...
Proeven met auxinetoediening aan halfjaarlijkse rozestruikjes ter bevordering van versnelde wortelvorming hebben uitgewezen dat het gebruik van auxinen een positieve invloed hebben op het weer activeren van 'rustende' wortels en er worden meer wortels gevormd. Een hogere bodemtemperatuur direct na het planten van met auxine behandelde planten gaven...
In the Netherlands, the rose is the most important glasshouse cut flower. Approximately 50% of the glasshouse roses are combination plants, consisting of a scion cultivar and a rootstock of a different genotype. Rootstocks inducing differences in the vigour of the scion are suggested to differ in cytokinin production and export to the shoot, thereb...
This thesis deals with the influence of the growth regulator 2,4-dichlorophenoxyacetic acid (2,4-D) on the induction of callus in cultured immature embryos of Zea mays (L). In maize, two types of embryogenic callus can be induced in immature zygotic embryos.Type I callus, which is compact in appearance and hard to subculture, and type II callus, wh...
Only a small number ofphytohormonesare sufficient to regulate virtually every aspect of plant growth and development. Hence, adequate communication betweenphytohormonesis important to coordinate cellular processes during development. In this thesis we show that the plant gene ENOD40 plays a role in the communication betweenphytohormonesignaling pat...
De veredeling van tulp gaat traag door de lange generatietijd en door langzame vermeerdering op het veld. Een veredelingsprogramma van tulp duurt al snel 25 jaar. Dit kan aanzienlijk verkort worden door vermeerdering in weefselkweek. Er is nu een werkbaar protocol
Cyst ( Globodera spp. and Heterodera spp.) and root-knot nematodes ( Meloidogyne spp.), one of the most damaging crop pests, are a perfect example of highly adapted, sophisticated root parasites. These nematodes induces specialized feeding structures (cyst nematodes-syncytia, root-knot nematode-giant cells) within the host root and benefits from gu...
