Study On The Regulation Of Flower Season And Shape Of The Purple Chrysanthemum Variety Named 'Jian Liu Xiang Ju'

An ornamental purple chrysanthemum variety,'Jianliuxiangju', cultivated in the natural field were divided into two groups A and B. Group A was sprayed by distilled water and group B was watered by the composite reagent I (GY) (30mg·L-1) once every 5d, and it carried on six times. After entering the chrysanthemum budding phase, then the two groups were wiped buds by the composite reagent II (LY) (0,50,100,150mg·L-1) respectively once every 5d, which processed until the flower phase. That meant group A was treated by LY and group B by GY+LY. From analyzing the physiological and biochemical changes of leaves in bud phase, petals in flower phase and leaves in flower phase of group A, measuring the flower diameter in flower period and observing the date of early flowering and decay flower, the life of a single flower and flowering duration, we deduced the following results:1. After spraying GY in photoperiodic induction phase,'Jianliuxiangju'squaring time were delayed 2-3d compare to the references, the content of photosynthetic pigments, soluble protein and soluble sugar of leaves in bud period decreased, the activity of nitrate reductase(NR), superoxide dismutase(SOD), peroxidase(POD) and etc reduced and the production of superoxide anion(O2·1) rate increased.2. The changes of 'Jianliuxiangju' handled by LY follow:(1)In A and B groups, the soluble protein, soluble sugar, proline, anthocyanin, SOD, POD activity and fresh and dried ratios improved significantly compared to respective control groups and O2·- production rate, malondialdehyde(MDA) content and relative conductivity values of the petals more or less declined. The isozyme bands of POD and SOD was consistent with the activity change of POD and SOD. The treating effect of 150mg·L-1 LY was best, which showed the color of enzyme turned deep or bright. VitaminC(Vc), total protein, total sugar and ?-amylase activity of petals in flower period were higher.(2)In group A, soluble protein, soluble sugar, proline and photosynthetic pigment content increased compared to the leaves in flower period. SOD, POD, NR activity and fresh and dried ratios increased in various degrees and it can significantly reduced the rate of leaves O2·- production, content of MDA and relative conductivity values of leaching solution, in which the effect of 150mg·L-1 treatment group was best.3. The flowering time of group A advanced, withering period delayed, the appreciation time prolonged; in group B, the flower time more or less delayed, and the withering period changed correspondently. In group A, the mums whose buds were washed by 150mg·L-1 LY solution advanced earlier, flowering time was advanced 3d, withering time delayed 3d. So this treating group increased flowering duration 6d compared to the control group. While in group B, the flowering time delayed 3d, and delayed compared to the best group, withering time had no difference with the others. Therefore, a reasonable use of the above two kinds of solution together will enable the initial flowering time to advance 6d, withering time delayed 3d, flowering duration increased 9d, which effectively lengthens the flowering and the best view period. Thereby it will increase the economic value and view value of chrysanthemums.