Chemical composition, angiotensin-converting enzyme-inhibitory activity and antioxidant activities of few-flower wild rice (Zizania latifolia Turcz.).
J Sci Food Agric, 2012/1/15;92(1):159-64.
Qian B[1], Luo Y, Deng Y, Cao L, Yang H, Shen Y, Ping J
Affiliations
PMID: 21815157DOI: 10.1002/jsfa.4557
Impact factor: 4.125
Abstract
background: The chemical compositions of the stem and leaf sheath of few-flower wild rice were analysed. In addition, their extracts were evaluated for diphenylpicrylhydrazyl (DPPH) free radical-scavenging activity, ferric-reducing antioxidant power and angiotensin-converting enzyme (ACE)-inhibitory activity, since these are important properties of sources of nutraceuticals or functional foods.
results: The stems contained more ascorbic acid (0.06 g kg(-1) fresh weight), protein (28.18 g kg(-1) dry weight (DW)), reducing sugars (308.54 g kg(-1) DW), water-soluble pectin (20.63 g kg(-1) DW), Na(2) CO(3) -soluble pectin (44.14 g kg(-1) DW), K (8 g kg(-1) dry matter (DM), S (6 g kg(-1) DM) and P (5 g kg(-1) DM) but less starch, total dietary fibre, Si, Na and Ca than the leaf sheaths. The DPPH free radical-scavenging IC(50) values of the stem and leaf sheath extracts were 19.28 and 21.22 mg mL(-1) respectively. In addition, the ACE-inhibitory IC(50) value of the stem extracts was 38.54 mg mL(-1).
conclusion: Both the stem and leaf sheath extracts exhibited good antioxidant properties, while good ACE-inhibitory activity was detected only in the phosphate buffer solution extracts of the stem. Few-flower wild rice could be processed into formula feeds for fish, poultry, etc. or functional foods for persons with high blood pressure.
MeSH terms
Angiotensin-Converting Enzyme Inhibitors; Antioxidants; Ascorbic Acid; Biphenyl Compounds; Dietary Fiber; Dietary Proteins; Dietary Sucrose; Dietary Supplements; Ferric Compounds; Flowers; Functional Food; Humans; Oryza; Pectins; Picrates; Plant Extracts; Plant Leaves; Plant Proteins; Plant Stems; Poaceae; Starch; Trace Elements
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