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Micropropagation of the Mongolian medicinal plant Zygophyllum potaninii via somatic embryogenesis
Gun‑Aajav Bayarmaa,이나념,강호덕,Batlai Oyuntsetseg,문흥규 한국식물생명공학회 2018 Plant biotechnology reports Vol.12 No.3
The Mongolian medicinal plant Zygophyllum potaninii has been assessed as an endangered species with regional status. We applied the somatic embryogenesis technique using aseptic in vitro germinants of the plant as an effective propagation technology. The seed germination rate in vitro was 16.5% after 2 weeks of culture. Embryonic calli (EC) and somatic embryos (SEs) were induced using the cotyledon or hypocotyl segments of the germinants. Calli were effectively induced on MS medium supplemented with 0.1 mg/L 2, 4-dichlorophenoxy acetic acid (2, 4-d) and 0.5 mg/L 6-benzylamino purine (BA). The callus was composed of pale yellow or pale green friable cells. SE formed from EC only on Murashige and Skoog medium (MS) with 0.5 mg/L abscisic acid (ABA). Other concentrations of ABA failed to induce SE formation. All SEs germinated in MS medium with different salt levels. However, normal plant conversion was achieved only on half-strength MS medium. The converted plantlets were effectively acclimatized in vitro in sand and transferred to a mixture of sand and perlite (1:1 v/v) in the greenhouse. After 8 weeks of culture, 55.4% of the plants survived. This is a first report of propagating the medicinal desert plant Z. potaninii via somatic embryogenesis and plant regeneration.
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Nudkhuu NYAMGEREL,Shukherdorj Baasanmunkh,Batlai Oyuntsetseg,Dashzeveg OYUNTSETSEG,Joscelyn Norris,최혁재,Gun-Aajav BAYARMAA 한국식물분류학회 2023 식물 분류학회지 Vol.53 No.1
Saussurea dorogostaiskii Palib. (Asteraceae) is a critically endangered medicinal plant in Mongolia and Russia. We studied the genetic variation of S. dorogostaiskii from three mountains of northern Mongolia. The genetic profile was assessed in 70 individuals from eight populations using five inter-simple sequence repeat markers, producing 53 loci with 96.4% polymorphism across all bands. Shannon’s index (I) and Nei’s gene diversity (H) value at the species level of S. dorogostaiskii are 0.25 and 0.17, respectively. An AMOVA showed high genetic variation among the populations (22% of populations and 32% of mountains), consistent with the high genetic differentiation (GST = 0.49) and low gene flow (Nm = 0.51) in S. dorogostaiskii populations. Eight populations were clustered into two groups, corresponding to their geographic locations. The low within-population genetic diversity and high genetic differentiation among S. dorogostaiskii populations factor into their endangered designation. This genetic analysis reveals that all populations are equally threatened, and community-based conservation is appropriate for these species.
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