In other words, chilling and LD conditions resulted in
larger but fewer leaves, an effect that was associated with
reduced stem branching under these conditions. ‘Korona’
consistently produced more leaves than ‘Elsanta’. Stolon
formation was greatly stimulated by chilling under SD but not
under LD conditions, resulting in a highly significant
interaction of chilling and day length (Fig. 5). ‘Elsanta’ did
not form stolons at all in non-chilled plants in SD, while the
number increased progressively with increasing chilling so that
with 6 weeks of chilling the number was higher in SD than in
LD conditions. The LD stimulation of stolon formation was
stronger in ‘Korona’ than in ‘Elsanta’ plants, yielding a highly
significant interaction of cultivar photoperiod (Table 1).