Biodiversity, ecological distribution and sustainable use of species of the genus Macrotomia (Arnebia)

Document Type : Research Paper

Authors

1 Faculty of Postgraduate Medical Education, Khoja Akhmet Yassawi International Kazakh-Turkish University, Turkestan, Kazakhstan

2 Kazakh National Medical University named after S.D. Asfendiyarov, Almaty, Kazakhstan

3 South Kazakhstan Medical Academy, Shymkent, Kazakhstan

4 Faculty of Natural Sciences, Zhanibekov University, Department of Biology, Shymkent, Kazakhstan

10.22124/cjes.2026.9794

Abstract

The Macrotomia (Arnebia) genus of the family Arnebiaceae occupies a unique position in traditional medicine and the pharmaceutical industry owing to its ability to accumulate biologically active naphthoquinone compounds, particularly shikonin. However, information on the biodiversity, ecology, population status, and medicinal potential of these species in southern Kazakhstan remains limited. This study aimed to comprehensively assess the morphology, ecology, population characteristics, and medicinal significance of Macrotomia ugamensis and Macrotomia euchroma in natural populations of the Tolebi, Kazygurt, and Tulkibas districts of the Turkistan Region, Republic of Kazakhstan, during 2025. Morphological characteristics, population parameters, soil physicochemical properties, and climatic conditions were investigated through field surveys conducted at 15 sampling sites using transects and permanent plots. Naphthoquinone compounds were extracted and quantified by high-performance liquid chromatography (HPLC). The results demonstrated that M. ugamensis is confined to mountainous habitats above 1900 m a.s.l., characterized by mean annual temperatures below 9 °C and annual precipitation exceeding 350 mm, whereas M. euchroma predominates in warmer and drier foothill and plain ecosystems with temperatures above 13 °C. The total naphthoquinone content of M. ugamensis (15.7 mg/g extract) was significantly higher than that of M. euchroma (p < 0.001), and shikonin concentration was strongly positively correlated with altitude (r = 0.95). Populations of M. euchroma were sparse and fragmented, with densities below one individual per square meter in several surveyed locations. These findings indicate that the contrasting ecological requirements of the two species necessitate species-specific conservation strategies, while their declining populations highlight the importance of cultivation and ex situ conservation to ensure sustainable utilization.

Keywords


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