Ecological Study of Rosette Formation of Eustoma Grandiflorum

点击翻译按钮获取中文摘要

Rosette formation of young seedlings of Eustoma grandiflorum was induced by high temperature. Season had an additional (unknown) effect, especially on plants grown in intermediate temperatures.Bolting was reduced at 30 ^ﾟC and 35 ^ﾟC but not at 25 ^ﾟC.Exposing germinating seedlings to high temperatures for as little as 7 days reduced, and for more than 2 weeks completely inhibited bolting in plants subsequently grown at low temperatures.In conclusion, it is important to keep the seedlings under a condition with an average temperature at about 25 ^ﾟC and the minimum temperature lower than 20 ^ﾟC from the time of sowing until number of true leaves exceeds four to prevent the rosette induction. Especially, two weeks from the sowing is critical ; therefore, the temperature control during the period is most important.