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1 JOURNAL OF FISHERIES OF CHINA Vol. 37 No. 10 Oct DOI /SP. J * % EPA 18 1 n n n n n n n-6 AA 20 5 n- 3 EPA 70% 2 EPA EPA EPA n-6 /n ~ 7. 7 WHO /FAO EPA TS A Pyropia yezoensis 5 1 ~ Rhodophyta Rhodophyceae 11 Bangiophycidae Bangiales Bangiaceae Pyropia fatty acid SFAs 1 UFAs MUFAs 1. 1 PUFAs n-3 n-6 n n-3 n n-6 /n WHO /FAO AA10A BAD13B BE BE xupu666@ 163. com

2 Tab. 1 1 The survey of the analysed material no. name backgrounds of material the breeding organization 1 2 Y Y-H001 4 Y-H002 5 Y-L0601-a 6 Y-L Y-L0602-a 8 Y-L Y Y-06D GC-MS QP AOC- 20i SHIMADZU 30 m SUPELCO GC % 1. 0 ml /min 1 min 3 min 60 2 min 15 /min /min 15 min 1 μl MS EI 70 ev Scan 45 ~ 450 m /z mm μm RTX-Wax mg /g Origin GC-MS 220 NISTO5 NIST05s Tab. 2 The fatty acid composition and content of samples harvested in different time mg / g 1 fatty acid 2 no n n n n n n n n n

3 fatty acid 2 no n n n n n n n n n % ~ % EPA ~ % ~ % mg /g mg /g SFA /UFA 1 3 EPA /AA 9 ~ ~ ~ 35 mg /g mg /g % ~ % mg /g ~ mg /g ~ % ~ % EPA mg /g mg /g ~ mg /g % ~ % SFA /UFA 1 3 EPA /AA 10 ~ Fig. 1 The total fatty acid content of samples n n n n n n n-6 AA 20 5 n-3 EPA EPA ~ % ~ % mg /g % ~ % 2 Fig The SFAs relative content of samples ~ mg /g % ~ % ~ mg /g % ~ % EPA SFA /UFA EPA /AA 11 ~ 16

4 Fig. 5 The n-6 PUFAs relative content of samples Fig. 3 The UFAs relative content of samples n-3 n-6 n-3 n-6 PUFA n-3 PUFA EPA n-6 PUFA AA 1 n-3 PUFA ~ mg /g n-6 PUFA ~ mg /g n-6 /n ~ n-3 PUFA ~ mg /g n-6 PUFA ~ mg /g n-6 /n ~ n-3 PUFA ~ mg /g n-6 PUFA ~ mg /g ~ Fig n-3 The n-3 PUFAs relative content of samples n SFA / UFA 1 / % EPA 50% 4 P. haitanensis % EPA 22% Johns 11 Pyropia sp % EPA 41. 8% Blouin 15 P. umbilicalis P. amplissima n-6 /n % EPA 39% 16 0 EPA 3. 2 n-3 PUFA EPA n-6 PUFA AA 18 2 n-6 EPA ~ mg /g 56% 1 3 EPA ~ mg /g ~ mg /g 53% ~ 51% EPA

5 n-3 n-6 PUFA mg /g EPA 56% Bangia 7 ~ 17 3 Ⅰ EPA PUFA n-6 /n Gracilaria lemaneiformis Bangia sp. 26 Khotimchenko 19 Ptilota sp. EPA 50% Fleurence 18 EPA P. umbilicalis EPA AA /EPA 50% EPA AA /EPA 28 Khotimchenko 19 EPA /AA Cohen 29 Porphyridium cruentum 3 Ⅰ. EPA 2 30 AA /EPA Ⅱ. 1 Ⅲ. AA 25 AA /EPA / AA /EPA ~ Ⅰ EPA /AA ~ ~ ~ ~ Sutherland J E Lindstrom S C Nelson W A et al. A new look at an ancient order generic revision of the n-3 n-6 PUFA Bangiales Rhodophyta J. Journal of Phycology n-6 /n n /n ~ 7. 7 n-3 PUFA 2 Fleurence J. Seaweed proteins biochemical n-6 /n-3 nutritional aspects and potential uses J. Trends in Food Technology J Nelson 23 Chondracanthus 4. J canaliculatus 5 Noda H. Health benefits and nutritional properties of nori J. Journal of Applied Phycology I. J EPA 7. M. 3. AA n-3 DHA EPA filicina 22 EPA J % 10 EPA 49. 5% 9 Smit L A Mozaffarian D Willett W. Review of fat Mishra 27 Palmaria palmata and fatty acid requirements and criteria for EPA 2012 developing dietary guidelines J. Annals of Nutirtion 1 Metabolism ~ ~ ~ 6 10 WHO & FAO. Fats and oils in human nutrition J. 2 Nutrition reviews

6 Johns R B Nichols P D Perry G J. Fatty acid composition of ten marine algae from Australian waters J. Phytochemistry Bling E G Dyer W J. A rapid method of total lipid extraction and purification J. Canadian Journal of Biochemistry Physiology Herbreteau F Coiffard L J M Derrien A et al. The fatty acid composition of five species of macroalgae J. Botanica Marina Liu X J Chen F Jiang Y. Differentiation of Nostoc flagelliforme and its neighboring species using fattyacid profiling as a chemotaxonomic tool J. Current Microbiology Blouin N Calder B L Perkins B et al. Sensory and fatty acid analyses of two Atlantic species of porphyra Rhodophyta J. Journal of Applied Phycology Seasonal changes in the content of lipids fatty acids J Russian Journal of Plant Physiology J Fleurence J Gutbier G Mabeau S et al. Fatty acids from 11 marine macroalgae of the French Brittany coast J. Journal of Applied Phycology Khotimchenko S V Vaskovsky V E. Distribution of C 20 polyenoic acids in red macrophytic algae J. Botanica Marina J. the red alga Porphyridium cruentum correlation to growth rate J. Journal of Phycology J Ivesa L Blazlina M Najdek M. Seasonal variations in fatty acid composition of Caulerpa taxifolia M. Vahl. C. Ag. in the northern Adriatic Sea Malinska Croatia J. Botanica Marina Nelson M M Phleger C F Nichols P D. Seasonal lipid composition in macroalgae of the Northeastern Pacific Ocean J. Botanica Marina Khotimchenko S V Yadovleva I M. Lipid composition of the red alga Tichocarpus crinitus exposed to different levels of photon irradiance J. Phytochemistry Phleger C E. Biochemistry and Molecular Biology of Fisher M. Holland Elsevier Science Gerasimenko N I Busarova N G Moiseenko O P. and pigments in brown alga Costaria costata J. 27 Mishra V K Temelli F Ooraikul B et al. Lipids of the red alga Palmaria palmata J. Botanica Marina Kim M K Dubacq J P Thomas J C et al. Seasonal variations of triacylglycerols and fatty acids in Fucus serratus J. Phytochemistry Cohen Z Vonshak A Richmond A. Effect of environmental conditions on fatty acid composition of

7 The variation in fatty acids composition and content of ten Pyropia yezoensis cultivars during different harvest time periods MA Fei 1 2 LU Qinqin 3 HU Chuanming 3 ZHANG Tao 1 ZHOU Wei 3 LI Jiafu 1 DENG Yinyin 1 ZHU Jianyi 1* 1. Department of Biology and Food Engineering Changshu Institute of Technology Changshu 2. Collge of Life Science Nanjing Normal University Nanjing 3. Institute of Oceanology and Marine Fisheries of Jiangsu Nantong China China China Abstract Ten cultivated strains of Pyropia yezoensis were studied in this research in order to identify the effects of the strain difference and the harvesting time difference on the fatty acid composition and content of P. yezoensis. The results show ed that the fatty acid composition of these ten P. yezonsis samples w as not affected however the content of each fatty acid w as affected and the difference among ten samples w as significant. The saturated fatty acids SFAs were mainly composed of with 16 0 as the highest component about 20%. The unsaturated fatty acids UFAs included 18 1 n n n n n n n-6 AA 20 5 n-3 EPA and the major componet was EPA about 50%. Samples harvested during the lowest water temperature period February contained the highest total fatty acids and EPA concentration the result indicates that the low water temperature has advantages in accumulating fatty acids especially UFAs of P. yezoenis. P. yezoensis is rich in UFAs especially EPA. The n-6 /n-3 ratios ranged from 4. 9 to 7. 7 during the whole study period and this range is consistent with the recommended diet ratio of WHO /FAO. Key words cultivated strain of Pyropia yezoensis fatty acids content fatty acids composition unsaturated fatty acids EPA Corresponding author ZHU Jianyi. xupu666@ 163. com

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