| The experiment materials are Dianthus Plumarius, which came from ecology garden of Yabuli forest enterprise (A) and Beihua university experimental plot of JiLin Province (B) respectively. The experiment adopted the measure of antificial water controlled to potted materials, and studied on the relative leaf water content (RWC) of its organize, the rate of holding water in leaf slice, the relative membrane permeability, the quality of the malondialdehydric acid (MDA), the chlorophylls (Chl), proline, soluble protein, and some other indexes including the changing of the net photosynthetic rate. The results showed:1. In the condition of water stress, the relative water content and the rate of holding water tend to cast down. As the stress becomes stronger, the relative water content descends more acutely, and the decreasing breath of A and B have been consistent. The tendencies in different birthing times have no obvious differences. In comparison with CK's indexes, the rate of holding water capacity of A and B decreased 59.00% and 61.64% respectively when it comes to the fifteenth day. The tendencies in different birthing periods are consistent.2.The inside swimming Proline (Pro) of Dianthus Plumarius shows its increasing trends in the condition of water stress, especially in the later stage of the stress, and it exhibits its acutely increasing trends. Compared with CK, the increasing breath of A and B come to 17.51 and 11.80 times respectively when it comes to the fifteenth day. In comparison with CK, the increasing breaths of various birthing periods are 11.16 and 17.51 times.3.Under the water stress, the soluble protein in Dianthus Plumarius shows its slowing-moving descent trend and the descent trends are basically consistent. Compared with CK, the soluble protein in A and B decreased to 29.75% and 33.68% respectively when it comes to the fifteenth day, which came down by 63.87% and 29.75% in different birthing periods.4. The content of the relative membrane permeability and MDA increased with the water stress become stronger. Compared with CK, the RMP of A and B increased 4.02 and 7.52 times. In comparison with CK, the increasing breaths in different birthing periods are 2.49 and 4.02 times. The increasing breadths of malondialdehydric acid in A and B are 1.48 and 2.44 times. The increasing breaths in different birthing periods are 5.52 and 1.48 times.5. With the water stress became more acutely. The content of Chl in A and B showed the consistent descending trend, compared with CK index, the Chl decreased by 59.69% and 52.59%. The differences of the Chl change in different birthing periods are not obvious.6.Under the water stress, both the net photosynthetic rate and the transpiration rate of the Dianthus Plumarius had dropped greatly. Compared with CK figure, the net photosynthetic rate of A and B descended 106.51% and 111.84%, and the changing breathing of thetranspiration rates were 87.38% and 89.91%, the decreasing rates of GS were 88.89% and 90.63%, when it comes to the fifteenth day.Generally, the Dianthus Plumarius came from Yabuli keeps the relatively higher contain of RWC, Chi and Pro under the water stress, but the lower RWP, MDA when compared with the ones from JiLin Province. This shows that the Dianthus Plumarius from Yabuli had stronger capacity of water stress-resistance, and weaker from JiLin Province. The differences in different birthing period of Dianthus Plumarius showed that the booming period keeps the higher contain of RWC and Pro, but the lower RWP and MDA, but the growing period converses. So we can get the conclusion that the Dianthus Plumarius booming period has the relatively stronger capacity of water stress-resistance, and the growing period relative weaker. |
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