AUTHOR=Dai Li-Xia , Miao Xiaolou , Yang Xiao-Rong , Zuo Li-Ping , Lan Zhi-Hui , Li Bing , Shang Xiao-Fei , Yan Feng-Yuan , Guo Xiao , Wang Yu , Zhang Ji-Yu 

TITLE=High Value-Added Application of Two Renewable Sources as Healthy Food: The Nutritional Properties, Chemical Compositions, Antioxidant, and Antiinflammatory Activities of the Stalks of Rheum officinale Baill. and Rheum tanguticum Maxim. ex Regel

JOURNAL=Frontiers in Nutrition

VOLUME=8

YEAR=2022

URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2021.770264

DOI=10.3389/fnut.2021.770264

ISSN=2296-861X

ABSTRACT=<p>Rhubarb plants (<italic>Rheum officinale</italic> and <italic>R. tanguticum</italic>) have edible stalks. In this work, we aimed to compare the nutritional properties, chemical compositions, and bioactivities of <italic>R. officinale</italic> (SRO) and <italic>R. tanguticum</italic> (SRT) stalks and to analyze the composition–function relationship. Results showed that the two stalks were good sources of fiber, as well as minerals. They contained abundant essential amino acids and essential fatty acids to regulate the immunity and prevent some chronic diseases; the contents of polyunsaturated fatty acids were 2,244.32 mg/100 g and 2,844.69 mg/100 g, respectively. The antioxidant activity were also proved. Metabolomics showed that SRO and SRT contained abundant phenolic acids. Due to the higher concentrations of flavones, SRT has better antiinflammatory activities than SRO by inhibiting NF-κB signaling pathway. Rhubarb stalks exhibited good safety in acute toxicity and cytotoxicity tests. This work indicated that the two stalks have nutritional value, safety, and bioactivities, and could be used as sources of nutritional ingredients for regulating the immunity of body in food industry.</p>