Abstract:

To investigate the adaptability of aerospace induced mutation Angelica sinensis (variety) under different ecological conditions, this study conducted a multi-site comparative trial using SP3 generation seedlings of the space-mutated ‘Hanggui 22H’ (HG) and the control variety ‘Mingui No.1’ (MG). These were transplanted to three distinct ecological regions: Shijiatai Village of Hetuo Township (HG-1, CK-1), Sigou Town of Min County (HG-2, CK-2) and Yanghua Village of Zhuoni County (HG-3, CK-3). The results showed that under different ecological conditions, ‘Hanggui 22H’ showed different morphological differences. During the vegetative growth stage, the plant population transplanted to Yanghua Village had the best growth vigor, and all the control traits were greater than those of the space-mutated population. During the early growth stage, the mutant plant population transplanted to Shijiatai Village was located at a high altitude with low temperature, and had weak antioxidant capacity and high peroxidation degree. In the middle and late growth stages, the mutant plant population in the high-altitude area showed strong adaptability, with enhanced antioxidant capacity and reduced peroxidation degree, indicating that it had cold adaptation ability. Under different ecological environments, the ferulic acid and extractable substances content of ‘Huanhui 22H’ were both higher than those of the control group, and positively correlated with rainfall, soil moisture content, total nitrogen and organic matter, and negatively correlated with available phosphorus, quick-release potassium and diurnal temperature difference. In summary, the aerospace induced mutation population exhibited certain morphological and physiological differences under different ecological conditions. The transplanted plants in Yanghua Village had the best growth vigor, while the plants in Shijiatai Village (HG-1) and Sigou Town (HG-2) showed certain adaptability during the growth middle and late stages, providing important basis for the modernization breeding and ecological regulation of Chinese medicinal materials.

Key words: Angelica sinensis, aerospace induced mutation, pharmaceutical period, ferulic acid, leachate, ecological conditions, adaptability, morphological differences, physiological characteristics, correlation