| dc.description.abstract | Gentiana scabrida Hayata var. punctulata S. S. Ying is a Taiwan endemic herbaceous plant that exhibits petal movements, opening in sunny conditions and closing on overcast days. It features unique ultraviolet patterns, with the petal region below the black spots having a stronger ultraviolet reflectance than the area above the black spots. These characteristics appear to help the Gentiana scabrida Hayata var. punctulata S. S. Ying adapt to the harsh alpine environment. Consequently, this study aims to investigate and observe the optical properties, petal movements, and pollination behavior of Gentiana scabrida Hayata var. punctulata S. S. Ying to gain insights into its survival strategy. These research yields three main findings. First, petal movements are triggered by a decrease in petal temperature, with a critical temperature of 15°C, effectively protecting the flower′s reproductive organs from damage caused by low temperatures or rain. This behavior aids the plant in coping with the rainy and cold conditions of the high mountains. Second, the ultraviolet patterns of Gentiana scabrida Hayata var. punctulata S. S. Ying are closely related to its pollination behavior, and disrupting these patterns can effectively deter insect visits. Third, the surface structures of Gentiana scabrida Hayata var. punctulata S. S. Ying‘s petals exhibit significant differences above and below the black spots, resulting in distinct optical properties. The surface structures above the black spots produce even diffused reflection signals, while those below the black spots have bright regions. These findings provide insights into Gentiana scabrida Hayata var. punctulata S. S. Ying‘s survival strategies. Petal movement enhances pollination efficiency, ultraviolet patterns attract insects, and the characteristics of diffuse reflectance signals created by surface structures result in a conspicuous color contrast in the visible light spectrum. | en_US |