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اثر غلظتهای مختلف کبالت بر رشد، برخی ترکیبات بیوشیمیایی و پروفایل اسیدهای چرب ریزجلبک Isochrysis galbana | ||
فیزیولوژی و بیوتکنولوژی آبزیان | ||
دوره 9، شماره 1، خرداد 1400، صفحه 97-123 اصل مقاله (1.52 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22124/japb.2021.15014.1356 | ||
نویسندگان | ||
حسین اسکندرنیا1؛ مهدی شمسایی مهرجان* 2؛ هومن رجبی اسلامی2؛ مهدی سلطانی3؛ ابوالقاسم کمالی4 | ||
1دانشجوی دکتری شیلات، گروه شیلات، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران | ||
2دانشیار گروه شیلات، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران | ||
3استاد گروه بهداشت و بیماریهای آبزیان، دانشکده دامپزشکی، دانشگاه تهران، تهران، ایران | ||
4استاد گروه شیلات، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران | ||
چکیده | ||
تغییر در غلظت مواد مغذی یکی از راهکارهای موثر در بهبود زیستتوده و ارزش غذایی ریزجلبکها محسوب میشود. در مطالعه حاضر اثر غلظتهای مختلف کبالت (001/0، 01/0 (شاهد)، 1/0، 1 و 10 میلیگرم در لیتر) بر تراکم سلولی، کلروفیلهای a و b، چربی، پروفایل اسیدهای چرب، عددهای یدی و صابونی ریزجلبک Isochrysis galbana به مدت دو هفته مورد بررسی قرار گرفت. افزودن 001/0 میلیگرم در لیتر کبالت موجب بهبود معنیدار در کلروفیلهایa (2118/3 میلیگرم در لیتر) و b (001/2 میلیگرم در لیتر)، محتوای چربی (09/24 درصد) و پروتئین (91/ 53 درصد) در مقایسه با تیمارهای دیگر شد (05/0P<). بیشترین میزان اسید چرب اشباع (83/47 درصد) در تیمار 10 میلیگرم در لیتر کبالت مشاهده شد، در حالی که کاهش کبالت تا مقدار 001/0 میلیگرم در لیتر سبب افزایش اسیدهای چرب تک غیراشباع (MUFA) و چند غیراشباع (PUFA) شد. همچنین، بیشترین و کمترین میزان عدد یدی و عدد صابونی نیز به ترتیب در غلظتهای 001/0 و 10 میلیگرم در لیتر کبالت مشاهده شد. به طور کلی، غلظت 001/0 میلیگرم در لیتر کبالت میزان کلروفیل، محتوای چربی، پروتئین و PUFA ریزجلبک I. galbanaرا ارتقا بخشید، با این وجود تغییر غلظت بهینه کبالت تاثیر منفی بر رشد داشت. | ||
کلیدواژهها | ||
کبالت؛ Isochrysis galbana؛ چربی؛ اسید چرب؛ ترکیبات بیوشیمیایی | ||
مراجع | ||
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