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Hsiao<\/jats:italic>is one of the most common herbs widely used in South and East Asia, to enhance people\u2019s health and reinforce vital energy. Despite its prevalence, however, the knowledge about phytochemical compositions and metabolite biosynthesis in<jats:italic>Astragalus membranaceus Bge. var. mongolicus (Bge.) Hsiao<\/jats:italic>is very limited.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>An integrated metabolomics and transcriptomics analysis using state-of-the-art UPLC-Q-Orbitrap mass spectrometer and advanced bioinformatics pipeline were conducted to study global metabolic profiles and phytochemical ingredients\/biosynthesis in<jats:italic>Astragalus membranaceus Bge. var. mongolicus (Bge.) Hsiao<\/jats:italic>. A total of 5435 metabolites were detected, from which 2190 were annotated, representing an order of magnitude increase over previously known. Metabolic profiling of<jats:italic>Astragalus membranaceus Bge. var. mongolicus (Bge.) Hsiao<\/jats:italic>tissues found contents and synthetic enzymes for phytochemicals were significantly higher in leaf and stem in general, whereas the contents of the main bioactive ingredients were significantly enriched in root, underlying the value of root in herbal remedies. Using integrated metabolomics and transcriptomics data, we illustrated the complete pathways of phenylpropanoid biosynthesis, flavonoid biosynthesis, and isoflavonoid biosynthesis, in which some were first reported in the herb. More importantly, we discovered novel flavonoid derivatives using informatics method for neutral loss scan, in addition to inferring their likely synthesis pathways in<jats:italic>Astragalus membranaceus Bge. var. mongolicus (Bge.) Hsiao<\/jats:italic>.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The current study represents the most comprehensive metabolomics and transcriptomics analysis on traditional herb<jats:italic>Astragalus membranaceus Bge. var. mongolicus (Bge.) Hsiao<\/jats:italic>. We demonstrated our integrated metabolomics and transcriptomics approach offers great potentials in discovering novel metabolite structure and associated synthesis pathways. This study provides novel insights into the phytochemical ingredients, metabolite biosynthesis, and complex metabolic network in herbs, highlighting the rich natural resource and nutritional value of traditional herbal plants.<\/jats:p><\/jats:sec>","DOI":"10.1186\/s12864-020-07005-y","type":"journal-article","created":{"date-parts":[[2020,11,18]],"date-time":"2020-11-18T18:03:41Z","timestamp":1605722621000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":34,"title":["Integrated metabolomics and transcriptomics study of traditional herb Astragalus membranaceus Bge. var. mongolicus (Bge.) Hsiao reveals global metabolic profile and novel phytochemical ingredients"],"prefix":"10.1186","volume":"21","author":[{"given":"Xueting","family":"Wu","sequence":"first","affiliation":[]},{"given":"Xuetong","family":"Li","sequence":"additional","affiliation":[]},{"given":"Wei","family":"Wang","sequence":"additional","affiliation":[]},{"given":"Yuanhong","family":"Shan","sequence":"additional","affiliation":[]},{"given":"Cuiting","family":"Wang","sequence":"additional","affiliation":[]},{"given":"Mulan","family":"Zhu","sequence":"additional","affiliation":[]},{"given":"Qiong","family":"La","sequence":"additional","affiliation":[]},{"given":"Yang","family":"Zhong","sequence":"additional","affiliation":[]},{"given":"Ye","family":"Xu","sequence":"additional","affiliation":[]},{"given":"Peng","family":"Nan","sequence":"additional","affiliation":[]},{"given":"Xuan","family":"Li","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2020,11,18]]},"reference":[{"issue":"1","key":"7005_CR1","doi-asserted-by":"publisher","first-page":"132","DOI":"10.1016\/j.jep.2007.05.020","volume":"113","author":"WC Cho","year":"2007","unstructured":"Cho WC, Leung KN. 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