Selenium-enriched yeast and selenium-rich optimization method for same

Abstract

The invention discloses selenium-enriched yeast and a selenium-rich optimization method for the same, and belongs to the field of bioengineering. The selenium-enriched yeast is taxonomically named Rhodotorula glutinis and is named X20, and a preservation serial number of the selenium-enriched yeast is CCTCCM2017225. The selenium-enriched yeast and the selenium-rich optimization method have the advantages that phosphate is added to induce yeast high-affinity phosphate-selenium transport protein expression, and accordingly the selenium transport capacity and the tolerance of the selenium-enriched yeast can be improved by the aid of the selenium-rich optimization method; only phosphorus elements need to be added into culture media, and the selenium-rich optimization method includes simple operation programs and is low in additive volume and cost.

Description

Technical field

[0001] The invention belongs to the field of bioengineering, and specifically relates to a selenium-enriched yeast and a selenium-enriched optimization method thereof. Background technique

[0002] Selenium is one of the essential trace elements for humans and animals. It has biological functions such as improving immunity, reducing mutations of carcinogens, removing free radicals in the body, and inhibiting lipid peroxidation. It can maintain thyroid hormone metabolism and cardiovascular system. , Antioxidant defense system and the normal function of the immune system. Studies have found that more than 40 diseases such as Keshan disease, Kashin-Beck disease, cataracts, and diabetes are all related to selenium deficiency. my country is a severely selenium-deficient country, and 72% of the country's land area is deficient in selenium ( <0.6mg / kg), 30% of which are severely selenium deficient. Selenium in my country is mainly distributed in Enshi, Fengcheng, Lo...

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