Effects of Irradiation and Temperature on Shoot Growth and Development in Blue Holly (Ilex × meserveae)

摘要: Evenly distributed production and sales of pot plants throughout the year would be ideal situation for greenhouse companies with respect to labour input planning. The market in Sweden, however, has two big selling seasons, spring period bedding plants, Christmas season. During summer, when climate conditions outdoors are most favourable cheap chose stop since they meet a weak late summer autumn. Blue holly (Ilex × meserveae ‘Blue Princess’ S.Y. Hu) was tested as potential new crop production. This hybrid is an evergreen, hardy woody plant that normally used garden shrub or decorations. advantage this hardy, final product can stored until period. present study investigated impact on growth blue from rooted cuttings small plants. In contrast outdoor-grown shrubs, formed several periodic flushes grown between 17 oC 26 irradiation levels 0.6 5 mol m–2 d–1 (Skye sensors). duration one flush number leaves produced were dependent both temperature levels. individuals within population, poorly synchronized. order statistically prove oscillations, analytical tool developed. A sine function modified describe oscillations value amplitude frequency each individual could estimated. values then analysed further differences treatments. Two environments chosen analysis holly: heated chambers artificial lighting (white cool fluorescent tubes). Oscillations vegetative growth, shoot length, side shoots dry weight compared light quality quantity well temperature. Due different oscillation patterns range tested, categorized enable comparison. Shoot almost continuous at high conditions, while cooler temperatures low only observed. intermediate pronounced observed up three experimental 93 days. branching pattern linked oscillations. Side developed after cessation flushes. treatments higher