Temporal and spatial variations in the proximate composition, amino acid, and mineral content of Pyropia yezoensis
Temporal and spatial variations in the proximate composition, amino acid, and mineral content of Pyropia yezoensis
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DOI：
10.1007/s10811-016-0862-z
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发表时间：
2016-05
影响因子：
3.3
通讯作者：
S. Jung;Seul-gi Kang;J. Son;J. Jeon;H. Lee;H. Shin
中科院分区：
文献类型：
--
作者：
S. Jung;Seul-gi Kang;J. Son;J. Jeon;H. Lee;H. Shin
Temporal and spatial variations in the proximate composition, amino acid content, and mineral content ofPyropia yezoensiswere evaluated at Jindo, Haenam, and Seochun on the southern and western coasts of Korea. The proximate composition ofP. yezoensisshowed a specific pattern where carbohydrate, lipid, and ash increased over time, while protein decreased over time from January to April. Amino acids fromP. yezoensis, such as alanine, aspartic acid, glutamic acid, leucine, and glycine, as well as 14 different minerals, were identified. Among them, aspartic acid, alanine, and glutamic acid were present at the highest concentrations. The concentration of alanine ranged from 3.40 ± 0.22 to 0.97 ± 0.07 g (100 g)−1at all sites. Five macro minerals (Ca, K, Mg, Na, and P) and seven micro minerals (Mn, Co, Fe, Ni, Cu, Zn, and Cr) were measured at three different sites. The macro mineral K was present at the highest concentration, followed by P, Na, Ca, and Mg. The concentration of K showed spatial and temporal variations.P. yezoensisat Haenam contained 3249.39 ± 100.82 mg (100 g)−1in January, but decreased to 55.39 ± 209.95 and 426.00 ± 389.74 mg (100 g)−1in February and March, and then increased to 2120.42 ± 454.53 mg (100 g)−1in April. The micro mineral, Fe, was present at the highest concentrations, followed by Zn and Co. The concentration of Fe ranged from 42.71 ± 57.23 to 12.08 ± 1.55 mg (100 g)−1in March and April at Haenam. The concentration of Zn was highest in January and then gradually decreased from February to April, while Jindo and Haenam did not show spatial and temporal variations in Zn concentrations. In this study, temporal and spatial variations in the proximate composition, amino acid content, and mineral content ofPyropiawere determined to analyze the protein, amino acid, lipid, carbohydrate, and mineral contents, which showed temporal and spatial variations during cultivation from October to April.
