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Bulletin of Botanical Research ›› 2025, Vol. 45 ›› Issue (1): 111-118.doi: 10.7525/j.issn.1673-5102.2025.01.012

• Original Paper • Previous Articles     Next Articles

Whitening and Antioxidant Activities of Leaf Polysaccharide from Dendrobium officinale

Yuxin YAN1,2, Meijun HE1, Yu LI1, Xiaoman YUAN1, Xuhui TAN1, Ming CHENG1, Kai LUO2, Lujing LIAO1()   

  1. 1.Institute of Chinese Herbal Medicines,Hubei Academy of Agricultural Sciences/Key Laboratory of Biology and Cultivation of Herb Medicine,Ministry of Agriculture and Rural Affairs,Enshi 445000
    2.School of Biological and Food Engineering,Hubei University for Nationalities,Enshi 445000
  • Received:2024-07-25 Online:2025-01-20 Published:2025-01-23
  • Contact: Lujing LIAO E-mail:284372681@qq.com

Abstract:

Polysaccharide from the stems and leaves of Dendrobium officinale was extracted and purified by water extraction and alcohol precipitation, and its hygroscopic, moisturizing, whitening and antioxidant activities were clarified, respectively. The yield of polysaccharide(L-POL) extracted and purified from D. officinale leaves was(13.95±0.27)% and the purity was(92.14±7.75)%. L-POL had good moisture absorption and moisture retention effects, and moisture absorption rate and moisture retention rate were(9.50±0.57)% and (25.13±0.24)%, respectively. L-POL had strong DPPH free radical scavenging ability and in vitro tyrosinase activity with IC50 value of 2.232 and 54.930 g⋅L-1, respectively. L-POL with a concentration of 125 mg⋅L-1 could significantly inhibit the synthesis of melanin by mouse melanoma cells B16 with an inhibitory rate of 36.89%. In addition, L-POL with concentrations ranging from 75-300 mg⋅L-1 was not cytotoxic to mouse melanoma cells(cell viability of 89.33%-102.00%). The high-purity L-POL had good antioxidant, whitening, moisture absorption and other activities, which provided a new idea for the further development and utilization of D. officinale resources in cosmetics or whitening functional foods.

Key words: Dendrobium officinale, leaf polysaccharide, moisture-absorption and retention, antioxidation, skin whitening activity

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