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Exploring the interspecific relationships among Dendrobium species via electrochemical fingerprinting techniques

文献类型： 外文期刊

作者： Xia, Ke 1 ; Wu, Qiaofen 1 ; Chai, Shengfeng 1 ; Wang, Zaihua 3 ; Yang, Yanni 1 ; Liu, Qiao 1 ; Zhao, Zhiguo 1 ; Xiong, Zhongchen 1 ; Qiu, Shuo 1 ;

作者机构： 1.Guangxi Inst Bot, Guilin 541006, Guangxi Zhuang, Peoples R China

2.Chinese Acad Sci, Guangxi Key Lab Plant Funct Phytochem & Sustainabl, Guilin 541006, Peoples R China

3.Guangdong Acad Agr Sci, Environm Hort Res Inst, Guangdong Prov Key Lab Ornamental Plant Germplasm, Guangzhou 510640, Peoples R China

关键词： Electro-chemotaxonomy; Voltammetric profiles; Cluster analysis; Phylogenetic relationships; Medicinal orchids

期刊名称：INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE （ 影响因子：1.3； 五年影响因子：1.3 ）

ISSN： 1452-3981

年卷期： 2024 年 19 卷 9 期

页码：

收录情况： SCI

摘要： This study investigated the interspecific relationships among 29 Dendrobium species using electrochemical fingerprinting techniques. Differential pulse voltammetry was employed to record species-specific electrochemical profiles in both phosphate buffer solution (PBS) and acetic acid buffer solution (ABS). Distinct voltammetric patterns were observed for each species, with ABS yielding higher peak currents compared to PBS. On average, peak currents in ABS were 37.2 % +/- 5.8 % higher than in PBS across all species. For example, D. nobile showed a peak current of 12.3 mu A in ABS compared to 8.9 mu A in PBS, a 38.2 % increase. Normalized twodimensional plots of the electrochemical fingerprints served as unique signatures for species differentiation. Cluster analysis of the electrochemical data revealed phylogenetic relationships largely consistent with previous molecular studies, while also highlighting novel groupings. For instance, D. parishii and D. pulchellum formed separate branches, indicating distant relationships with other species. Common species such as D. officinale, , D. nobile, , D. primulinum, , and D. loddigesii clustered together, confirming their close relationships. Interestingly, species from Sect. Dendrobium showed mixed clustering with species from four other sections, reflecting the genus's complex evolutionary history. While some inconsistencies with previous molecular phylogenetic studies were noted, such as the distant relationship between D. parishii and D. anosmum, , the overall congruence between electrochemical and molecular data validates the potential of this approach. This study demonstrates that electrochemical fingerprinting, combined with appropriate data analysis techniques, can provide valuable insights into the taxonomic relationships and chemical diversity of Dendrobium species, offering a complementary tool to traditional morphological and molecular methods for plant systematics and conservation efforts.

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