Stock and Scion Growth Relationships and the Dwarfing Mechanism in Apple

Effects of the plant growth regulators on expression of MdTFL1 promoter fused β-glucuronidase (GUS) reporter gene in apple (Malus spp.) tissues in vitro

“…Our results showed that expression of MdTFL1 was induced strongly by cytokinin throughout newly generated young shoots, and also enhanced by the combination of cytokinin and auxin in shoot apices (Figures 2, 3). In apple trees, cytokinin is synthesized in the apical region of roots, while auxin is produced in the apical region of young shoots (Lockard and Schneider 1981). These observations and our results suggest that the cytokinin produced in the roots induces MdTFL1 expression to maintain high juvenility at the base of plant.…”

Graft Incompatibility

“…Similar symptoms caused by common pathogenesis-related proteins, Mn toxicity, and water stress provide evidence that similar symptoms caused by different factors may have common metabolites or physiological mechanisms (Edreva 1990). As is the case with dwarfing mechanisms (Lockhard and Schneider 1981), more than one mechanism of incompatibility might be involved, and one mechanism might not necessarily exclude another. In the same way, depending on the species being grafted, more than one type of cell recognition model could be possible.…”

Rootstock genotype determines phenol content in apple fruits

“…Various studies demonstrated rootstock effect on tree vegetative and generative development, fruit quality (Kviklys et al 2012(Kviklys et al , 2013, uptake and transport of water and minerals (Lochard and Schneider 1981). Therefore a presumption of possible rootstock effect on different pattern of accumulation of bioactive substances in apple fruits could be made.…”