유산균의 분류 및 보존관리

• 영문명: Management for Lactic Acid Bacteria
• 발행기관: 한국유산균프로바이오틱스학회
• 저자명: 이정숙(Jung-Sook Lee)
• 간행물 정보: 『Current Topics in Lactic Acid Bacteria and Probiotics』Current Topics in Lactic Acid Bacteria and Probiotics 1권 1호, 38~42쪽, 전체 5쪽
• 주제분류: 농수해양 > 식품과학
• 파일형태: PDF
• 발행일자: 2013.01.30

영문 초록

The lactic acid bacteria are Gram-positive, non spore-forming, catalase-negative, of nonaerobic habit but aerotolerant, fastioius, acid-tolerant, nonrespiring cocci or rods, which produce lactic acid as a major sole end product of the fermentation of sugar. They consist of more than 20 genera including Aerococcus, Alloiococcus, Carnobacterium, Dolosigranulum, Enterococcus, Globicatella, Lactobacillus, Lactococcus, Lactosphaera, Leuconostoc, Oenococcus, Pediococcus, Streptococcus, Tetragenococcus, Vagococcus, Weissella, and etc. It is difficult to differentiate lactic acid bacteria based on physiological and biochemical characteristics because they grow on the same selection medium, MRS medium and have similar characteristics in traditional taxonomic test. Today, we have the means to examine macromolecules of the cell such as nucleic acids, believed to be more accurate in defining relationships and phylogenetic positions. Fortunately, nature has provided us with different kinds of nucleic acids for different types of taxonomic studies. Close relations (at species and subspecies level) can be determined with DNA-DNA homology studies. Based on analysis of 16S rRNA sequence for lactic acid bacteria, new genera have been reported and some species have transferred to other genera. With this technique, a clearer picture of the phylogeny of lactic acid bacteria is emerging. It is difficult to do long-term preservation of lactic acid bacteria because of their weak viability. We usually use the methods of lyophilization and cryopreservation with skim milk for long-term preservation of lactic acid bacteria.

목차

유산균이란?

유산균의 양면

유산균 분류의 어려움

유산균의 장기안전보존관리

요약

키워드

lactic acid bacteria taxonomy management