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Blumea balsamifera is a famous Chinese Minority Medicine, which has a long history in Miao, Li, Zhuang, and other minority areas. In recent years, due to the influence of natural and human factors, the distribution area of B. balsamifera resources has a decreasing trend. Therefore, it is very important to analyze the suitability of B. balsamifera in China. Following three climate change scenarios (SSP1-2.6, SSP2-4.5, and SSP5-8.5) under 2050s and 2070s, geographic information technology (GIS) and maximum entropy model (MaxEnt) were used to simulate the ecological suitability of B. balsamifera. The contents of L-borneol and total flavonoids of B. balsamifera in different populations were determined by gas chromatography (GC) and ultraviolet spectrophotometry (UV). The results showed that the key environmental variables affecting the distribution of B. balsamifera were mean temperature of coldest quarter (6.18–26.57 ℃), precipitation of driest quarter (22.46–169.7 mm), annual precipitation (518.36–1845.29 mm), and temperature seasonality (291.31–878.87). Under current climate situation, the highly suitable habitat was mainly located western Guangxi, southern Yunnan, most of Hainan, southwestern Guizhou, southwestern Guangdong, southeastern Fujian, and western Taiwan, with a total area of 24.1 × 104 km2. The areas of the moderately and poorly suitable habitats were 27.57 × 104 km2 and 42.43 × 104 km2, respectively. Under the future climate change scenarios, the areas of the highly, moderately, and poorly suitable habitats of B. balsamifera showed a significant increasing trend, the geometric center of the total suitable habitats of B. balsamifera would move to the northeast. In recent years, the planting area of B. balsamifera has been reduced on a large scale in Guizhou, and its ex situ protection is imperative. By comparison, the content of L-borneol, total flavonoids and fresh leaf yield had no significant difference between Guizhou and Hainan (P > 0.05), which indicated that Hainan is one of the best choice for ex situ protection of B. balsamifera. [ABSTRACT FROM AUTHOR]

Ai pian, derived from Blumea balsamifera (L.) DC. has various medicinal effects and a complex composition. The goal of this study was to analyze the chemical composition of Ai pian by using samples from different regions to explore differences between the chemical composition and its blood composition from treated mice to clarify whether its efficacy is related to synergism of multiple components to provide references for rational quality control. Gas chromatography – mass spectrometry (GC-MS) was used to determine and compare chemical compositions of blank and Ai pian containing serum of mice after 30 min of oral administration of Ai pian of seven batches from Zhenfeng, Wangmo and Luodian Counties; Guizhou Province; and Tian'e County; and Guangxi Province. Sixteen to twenty-two compounds of Ai pian were identified, with fourteen common compounds including L-borneol, L-camphor, borneol acetate, L-linalool, α-gurjunene, and 3-t-butyl-1, 2-dimethoxybenzene. Four to seven compounds were identified as blood components of Ai pian, and L-borneol, L-camphor, and borneol acetate were common prototypes with relative compositions from 13.720 to 36.509%, 2.336 to 5.219%, and 0.401 to 1.188%, respectively. Methyl oleate was a common metabolic component with a relative concentration of 0.021 to 0.446%. The chemical composition and blood components of Ai pian were complex, and its efficacy was related to synergism between several components including L-borneol, L-camphor, and borneol acetate. Therefore, detecting multiple index components of Ai pian is essential for quality control. [ABSTRACT FROM AUTHOR]