Article,

Proximate Composition, Amino Acid Profile, Fatty Acid Composition, and Mineral Content of Peanut Seeds Hydroponically Grown at Elevated CO2 Levels

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J. Agric. Food Chem., 45 (10): 3863--3866 (Oct 1, 1997)
DOI: 10.1021/jf970077f

Abstract

Peanut plants (Arachis hypogaea L. cv. Georgia Red) were grown hydroponically using a recirculating nutrient film technique. The effect of CO2 enrichment on nutritive composition of hydroponic peanut seeds was examined at two elevated CO2 levels (700 and 1400 ppm) that simulate potential conditions in National Aeronautics and Space Administration (NASA) Controlled Ecological Life-Support Systems (CELSS) and compared to ambient CO2 condition in hydroponics (the control). Plants were harvested at 97 days after planting, and the seeds were air-dried and analyzed for composition. Percentages of crude protein, crude fat, ash, and carbohydrate of hydroponic peanut seeds were around 30\%, 30\%, 3\%, and 30\%, respectively. The major amino acids were aspartic acid, glutamic acid, and arginine. The limiting amino acid of peanut, methionine, was 1.2\%. Linoleic acid was the major fatty acid, followed by oleic and palmitic acids. The major mineral elements were K, P, Mg, and Ca. The results showed that certain peanut varieties can be grown hydroponically. The composition of the hydroponically grown peanuts is generally similar to reported peanut composition. The nutrient composition was not affected at the elevated CO2 concentrations investigated. Keywords: CELSS; hydroponic; NFT; elevated CO2 levels; peanut

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