| dc.description.abstract | Among the research about flower, they noticed the reflectance of inner petal is apparently lower than outer one by taking pictures under UV and there the nectar is. Moreover, the vision of insects is commonly sensitive at UV-A. As a result, they believe that the pattern under UV is a cue to attract insects and it will benefit flowering plants to reproduce. Besides the pattern of petals under UV, it can also correspond to the one under VIS in some flowers and the result caused by surface structure and Gentiana scabrida Hayata var. punctulata S.S. Ying show the similar characteristic. Gentiana scabrida Hayata var. punctulata S.S. Ying is the endemic species in Taiwan and there are some black dots distributing on the petal. Gentiana scabrida Hayata var. punctulata S.S. Ying distribute at high altitude mountain where is UV-rich. Apart from it only bloom during getting sunlight, the flower will open again after pollinating. Bloom consume a lot of energy for plants, we think that this is the way of life which Gentiana scabrida Hayata var. punctulata S.S. Ying has evolved to adapt the environment. To confirm the statement, we design some experiments to observe the relationship between Gentiana scabrida Hayata var. punctulata S.S. Ying and light including the following methods. We capture the image of Gentiana scabrida Hayata var. punctulata S.S. Ying under UV and VIS on the Hehuan mountain and use dental wax to copy the structure surface of the petal, that is negative replica, at the scene. After using epoxy to manufacture the by negative replica, we use the replica as a control to prove the effect of surface structure on the optical properties the petal of Gentiana scabrida Hayata var. punctulata S.S. Ying Observing the surface structure of the petal under the scanning electron microscope and by embedded section, it was found that the surface structure of the petal can be roughly divided into the conical type and the striated type with smaller grating structures parallel to it. The boundary is exactly the same as the distribution of dark spots. In addition to the experimental results of the goninophotometric system, the fact that the surface structure of the petals plays an important role in its optical performance, and the absorption of light by the flower pigment, it also increases the contrast of the bright and dark region under UV light. This fact indirectly illustrates that UV light is very important to Gentiana scabrida Hayata var. punctulata S.S. Ying. | en_US |