Article(id=1241376210643636328, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1241376204247331313, articleNumber=null, orderNo=null, doi=10.13343/j.cnki.wsxb.20230619, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1696694400000, receivedDateStr=2023-10-08, revisedDate=null, revisedDateStr=null, acceptedDate=1708531200000, acceptedDateStr=2024-02-22, onlineDate=1773896752272, onlineDateStr=2026-03-19, pubDate=1714752000000, pubDateStr=2024-05-04, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773896752272, onlineIssueDateStr=2026-03-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773896752272, creator=13701087609, updateTime=1773896752272, updator=13701087609, issue=Issue{id=1241376204247331313, tenantId=1146029695717560320, journalId=1192105938417971205, year='2024', volume='64', issue='5', pageStart='1331', pageEnd='1682', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1773896750747, creator=13701087609, updateTime=1773897643611, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241379949253284790, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1241376204247331313, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241379949253284791, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1241376204247331313, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1436, endPage=1454, ext={EN=ArticleExt(id=1241376213609009282, articleId=1241376210643636328, tenantId=1146029695717560320, journalId=1192105938417971205, language=EN, title=
Streptococcus thermophilus capable of metabolizing galactose: mutagenesis and application in production of fermented milk, columnId=1241045257748533520, journalTitle=Acta Microbiologica Sinica, columnName=Research Articles, runingTitle=null, highlight=null, articleAbstract=
[Objective] Streptococcus thermophilus is widely used in the dairy industry as a common starter for fermented dairy products such as yogurt and cheese. Most strains ofS.thermophilus are galactose-negative (Gal−) and unable to metabolize galactose and excrete it extracellularly, which results in an increase in the galactose content in fermented milk.S.thermophilus can be treated by chemical mutagenesis to metabolize galactose and then used to develop the fermented milk products with low galactose content. [Methods] We used nitrosoguanidine (NTG) to induce the mutation ofS.thermophilus IMAU80846. Furthermore, we measured the activities of β-galactosidase (β-Gal), galactokinase (GalK), pyruvate kinase (PK), and glucokinase (GK) in the wild-type and mutant strains ofS.thermophilus IMAU80846 and analyzed the amino acid sequences encoding these enzymes.S.thermophilus IMAU80846Y that could metabolize galactose was obtained. We performed whole genome sequencing of the mutant strain and measured the content of lactic acid, lactose, galactose, and glucose in the fermented milk products produced with the wild-type strain and the mutant strain. We then compounded the wild-type strain and the mutant strain withLactobacillus delbrueckii subsp.bulgaricus IMAU20450, respectively, and characterized the two groups of fermented milk products during fermentation and storage. Finally, we prepared a fermented milk product with low galactose content. [Results] S.thermophiles IMAU80846Y had higher activities of β-Gal and GalK and lower activities of PK and GK than the wild-type strain. The amino acid sequences and whole genome sequences showed that the mutant strain had mutations in the genes involved in carbohydrate metabolism. The HPLC results showed that the fermented milk produced with the mutant strain had lower content of lactose and galactose and higher content of lactic acid and glucose than that produced with the wild-type strain. Compared with the compound group with the wild-type strain, the compound group with the mutant strain improved the titration acidity, viable cell count, viscosity, and water holding capacity of fermented milk. [Conclusion] The mutagenesis with NTG changed the ability ofS.thermophilus IMAU80846 to metabolize galactose, and the mutant strain could be used to produce the fermented milk with low galactose content.
, correspAuthors=Tong DAN, authorNote=null, correspAuthorsNote=
, copyrightStatement=Copyright ©2024 Acta Microbiologica Sinica. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Yanyan HE, Jiahui TAI, Wenhui LU, Xinrui CUI, Tong DAN), CN=ArticleExt(id=1241376217224499622, articleId=1241376210643636328, tenantId=1146029695717560320, journalId=1192105938417971205, language=CN, title=可代谢半乳糖嗜热链球菌的诱变选育及其在发酵乳生产中的应用, columnId=1192149544164012138, journalTitle=微生物学报, columnName=研究报告, runingTitle=null, highlight=null, articleAbstract=
【目的】嗜热链球菌(Streptococcus thermophilus)作为酸奶、奶酪等发酵乳制品的常用发酵剂,在乳品工业中应用广泛。大多数嗜热链球菌为半乳糖阴性(Gal−)菌株,不能代谢半乳糖而将其排出到胞外,导致发酵乳中半乳糖含量增加。因此可通过化学诱变的方法处理嗜热链球菌,使其可代谢半乳糖,开发一种低半乳糖含量的发酵乳。【方法】利用亚硝基胍(nitrosoguanidine, NTG)对嗜热链球菌IMAU80846进行诱变处理,测定野生株嗜热链球菌IMAU80846与突变株β-半乳糖苷酶(β-galactosidase, β-Gal)、半乳糖激酶(galactokinase, GalK)、丙酮酸激酶(pyruvate kinase, PK)和葡萄糖激酶(glucokinase, GK)活性,分析编码这些酶的氨基酸序列,得到一株可代谢半乳糖的嗜热链球菌IMAU80846Y,同时对突变株进行全基因组测序,并检测野生株和突变株发酵乳中乳酸、乳糖、半乳糖和葡萄糖的含量,最后将野生株和突变株分别与德氏乳杆菌保加利亚亚种IMAU20450进行复配发酵,测定两组发酵乳在发酵与贮藏期间的发酵特性,制备一款低半乳糖含量的发酵乳。【结果】突变株嗜热链球菌IMAU80846Y的β-Gal、GalK活性高于野生株,PK和GK活性低于野生株,氨基酸序列与全基因组测序结果表明突变株与糖代谢有关基因发生突变,HPLC检测结果表明突变株发酵乳中乳糖、半乳糖的含量均低于野生株,而乳酸、葡萄糖的含量高于野生株。发酵特性的分析结果表明,与野生株复配组相比,突变株复配组发酵乳具有良好的滴定酸度、活菌数、黏度以及持水力。【结论】嗜热链球菌IMAU80846经NTG诱变后,菌株代谢半乳糖的能力发生了变化,利用该突变株可生产一款低半乳糖含量的发酵乳。
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OD600 ofStreptococcus thermophilus IMAU80846 and mutant strains cultured in M17 and galactose M17 medium for 24 h. A, B, C, and D indicates the difference ofOD600 inStreptococcus thermophilus IMAU80846 and different mutant strains., figureFileSmall=RuY3kuYiTeSqF+vpnoSG9g==, figureFileBig=xWHzlZ9fp+Ys4wJfaDpY9g==, tableContent=null), ArticleFig(id=1241446119125864812, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图1, caption=
嗜热链球菌IMAU80846及突变株在M17与M17半乳糖培养基中培养24 h时的OD600, figureFileSmall=RuY3kuYiTeSqF+vpnoSG9g==, figureFileBig=xWHzlZ9fp+Ys4wJfaDpY9g==, tableContent=null), ArticleFig(id=1241446119369134457, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 2, caption=
Comparison ofStreptococcus thermophilus IMAU80846 and mutant strains β-Gal (A), GalK (B), GK (C), PK (D) enzyme activity. Different lowercase letters indicate significant differences (P<0.05). The same below., figureFileSmall=fmhE7HLYB60t2zZjbjr4Fw==, figureFileBig=E1TNu5wg42nNS5jPEoGy1g==, tableContent=null), ArticleFig(id=1241446119507546498, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图2, caption=
嗜热链球菌IMAU80846和突变株β-Gal (A)、GalK (B)、GK (C)、PK (D)活性的比较, figureFileSmall=fmhE7HLYB60t2zZjbjr4Fw==, figureFileBig=E1TNu5wg42nNS5jPEoGy1g==, tableContent=null), ArticleFig(id=1241446119629181322, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 3, caption=
Genetic variant mapping ofStreptococcus thermophilus IMAU80846Y. The outermost circle is the position coordinates of the reference sequence, from the outside to the inside, which are the gene location on the reference genome, the G+C content of the reference genome, the sequencing depth of the sample, the SNP number distribution of the sample, the InDel distribution of the sample, and the G+C skew of the reference genome., figureFileSmall=V2atmW0qfRjod9oErntVMQ==, figureFileBig=PEhXat/Uckjhy0lMB3eDnA==, tableContent=null), ArticleFig(id=1241446119746621839, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图3, caption=
嗜热链球菌IMAU80846Y基因变异图谱, figureFileSmall=V2atmW0qfRjod9oErntVMQ==, figureFileBig=PEhXat/Uckjhy0lMB3eDnA==, tableContent=null), ArticleFig(id=1241446119855673755, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 4, caption=
SNP mutant gene KEGG annotation ofStreptococcus thermophilus IMAU80846Y., figureFileSmall=mPDncu8qCFlyxbCHJcwVZA==, figureFileBig=PVyFYMTM8J/8zAx7L+dtYA==, tableContent=null), ArticleFig(id=1241446119977308579, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图4, caption=
嗜热链球菌IMAU80846Y SNP突变基因KEGG注释, figureFileSmall=mPDncu8qCFlyxbCHJcwVZA==, figureFileBig=PVyFYMTM8J/8zAx7L+dtYA==, tableContent=null), ArticleFig(id=1241446120094749097, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 5, caption=
SNP (A) and InDel (B) mutant gene GO annotation ofStreptococcus thermophilus IMAU80846Y., figureFileSmall=V6U7UNo9gH5v8JEYWioE+Q==, figureFileBig=wjbvnvfwTFdDQVk3UMEr+g==, tableContent=null), ArticleFig(id=1241446120187023790, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图5, caption=
嗜热链球菌IMAU80846Y SNP (A)和InDel (B)突变基因GO注释, figureFileSmall=V6U7UNo9gH5v8JEYWioE+Q==, figureFileBig=wjbvnvfwTFdDQVk3UMEr+g==, tableContent=null), ArticleFig(id=1241446120287687095, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 6, caption=
Comparison results of amino acid codons of β-Gal and GalK inStreptococcus thermophilus IMAU80846 and IMAU80846Y., figureFileSmall=RcV+mLBLmHEyh26MFhIRpg==, figureFileBig=cFWAb/h+j0uYBSQCperGLw==, tableContent=null), ArticleFig(id=1241446120413516224, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图6, caption=
嗜热链球菌IMAU80846和IMAU80846Y中β-Gal、GalK氨基酸密码子比对结果, figureFileSmall=RcV+mLBLmHEyh26MFhIRpg==, figureFileBig=cFWAb/h+j0uYBSQCperGLw==, tableContent=null), ArticleFig(id=1241446120535151047, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 7, caption=
Changes in the activity ofStreptococcus thermophilus IMAU80846Y in each generation of β-Gal (A), GK (B), GalK (C) and PK (D) when they were subcultured in M17 medium for 10 consecutive generations., figureFileSmall=Gim4lpVxeUO/YBGvZQ1QHg==, figureFileBig=FfPEy6Mgy2QagDGo/hquSA==, tableContent=null), ArticleFig(id=1241446120665174479, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图7, caption=
嗜热链球菌IMAU80846Y在M17培养基中连续传代培养10代,各代的β-Gal (A)、GK (B)、GalK (C)、PK (D)活性变化情况, figureFileSmall=Gim4lpVxeUO/YBGvZQ1QHg==, figureFileBig=FfPEy6Mgy2QagDGo/hquSA==, tableContent=null), ArticleFig(id=1241446120803586518, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 8, caption=
Changes in pH and titration acidity of fermented milk in the compound group with the wild-type strain and the compound group with the mutant strain during fermentation (A) and storage (B)., figureFileSmall=SB0oGUHA2Fe4aw4i56sm1A==, figureFileBig=fzLxUDl3fYtRDtbB48Um1A==, tableContent=null), ArticleFig(id=1241446120950387163, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图8, caption=
发酵(A)和贮藏(B)期间野生株复配组与突变株复配组发酵乳pH和滴定酸度的变化情况, figureFileSmall=SB0oGUHA2Fe4aw4i56sm1A==, figureFileBig=fzLxUDl3fYtRDtbB48Um1A==, tableContent=null), ArticleFig(id=1241446122514862563, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 9, caption=
Changes in viscosity of fermented milk in the compound group with the wild-type strain and the compound group with the mutant strain during fermentation (A) and storage (B)., figureFileSmall=syDkOmU7Ti97NXc0YbPMuA==, figureFileBig=HPRD2y1p4w/7Du2hU3PiMg==, tableContent=null), ArticleFig(id=1241446122636497387, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图9, caption=
发酵(A)和贮藏(B)期间野生株复配组与突变株复配组发酵乳黏度的变化情况, figureFileSmall=syDkOmU7Ti97NXc0YbPMuA==, figureFileBig=HPRD2y1p4w/7Du2hU3PiMg==, tableContent=null), ArticleFig(id=1241446122753937904, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 10, caption=
Changes in water holding capacity of fermented milk of the compound group with the wild-type strain and the compound group with the mutant strain during fermentation (A) and storage (B)., figureFileSmall=Wjpj1IZhpkTaCAxXn86J5A==, figureFileBig=hQNX2vc0375wLn//CH3img==, tableContent=null), ArticleFig(id=1241446122896544245, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图10, caption=
在发酵(A)和贮藏(B)期间野生株复配组与突变株复配组发酵乳持水力的变化情况, figureFileSmall=Wjpj1IZhpkTaCAxXn86J5A==, figureFileBig=hQNX2vc0375wLn//CH3img==, tableContent=null), ArticleFig(id=1241446123018179068, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 11, caption=
Changes in the viable cell counts of fermented milk of the compound group with the wild-type strain and the compound group with the mutant strain during fermentation (A) and storage (B)., figureFileSmall=/x5tdzl5tV5aVMgpGscmgw==, figureFileBig=NOX7rqQNC7yCUECg1cghgg==, tableContent=null), ArticleFig(id=1241446123144008200, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图11, caption=
在发酵(A)和贮藏(B)期间野生株复配组与突变株复配组发酵乳活菌数的变化情况, figureFileSmall=/x5tdzl5tV5aVMgpGscmgw==, figureFileBig=NOX7rqQNC7yCUECg1cghgg==, tableContent=null), ArticleFig(id=1241446123278225932, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Figure 12, caption=
Pathways of sugar metabolism inStreptococcus thermophilus. Arrow indicates a reaction, multiple enzymatic processes are shown by dashed arrows, double-headed arrow indicates a bidirectional reaction., figureFileSmall=WBkjycXAU+75d0yakDeHfA==, figureFileBig=Od8QNjL9zo8CC+yn/h5yqA==, tableContent=null), ArticleFig(id=1241446123412443672, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=图12, caption=
嗜热链球菌中糖的代谢途径, figureFileSmall=WBkjycXAU+75d0yakDeHfA==, figureFileBig=Od8QNjL9zo8CC+yn/h5yqA==, tableContent=null), ArticleFig(id=1241446123496329761, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Table 1, caption=
The primers used in this study
, figureFileSmall=null, figureFileBig=null, tableContent=
| Primer name | Primer sequence (5′→3′) | Product size (bp) |
| lacZ1F | CTATTATGGATACGGTGC | 200 |
| lacZ1R | ATGCTTTATTAAGTGCGG | |
| galK3 | CCGGAAGGACGTTACCTC | 386 |
| galR1 | CCGATGTCTAGTATCCTC | |
| pyk3F | CATGGTAACCACGCTGAG | 842 |
| pyk4R | AGCATTGTCGCATCAGTA | |
| glcK4F | TCGGTGGTGGTGTTTCTG | 641 |
| glcK4R | GAGGCATTGTCCCTTCAT | |
), ArticleFig(id=1241446123580215847, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=表1, caption=
本研究所用引物
, figureFileSmall=null, figureFileBig=null, tableContent=
| Primer name | Primer sequence (5′→3′) | Product size (bp) |
| lacZ1F | CTATTATGGATACGGTGC | 200 |
| lacZ1R | ATGCTTTATTAAGTGCGG | |
| galK3 | CCGGAAGGACGTTACCTC | 386 |
| galR1 | CCGATGTCTAGTATCCTC | |
| pyk3F | CATGGTAACCACGCTGAG | 842 |
| pyk4R | AGCATTGTCGCATCAGTA | |
| glcK4F | TCGGTGGTGGTGTTTCTG | 641 |
| glcK4R | GAGGCATTGTCCCTTCAT | |
), ArticleFig(id=1241446123676684844, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Table 2, caption=
The lethality of NTG mutagenesis in the treatment ofStreptococcus thermophilus IMAU80846
, figureFileSmall=null, figureFileBig=null, tableContent=
| Concentration of NTG (μg/mL) | Viable cell counts (CFU/mL) | Lethality (%) |
| The lowercase letters in the table indicate the significance of the difference in lethality at different concentrations (P<0.05). |
| 0 | (4.61±0.14)×109 | 0a |
| 100 | (2.77±0.17)×109 | 39.91b |
| 300 | (1.85±0.11)×109 | 59.87c |
| 500 | (1.63±0.13)×109 | 64.64c |
| 700 | (0.52±0.04)×109 | 88.72d |
| 900 | (0.07±0.01)×109 | 98.48e |
), ArticleFig(id=1241446123815096884, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=表2, caption=
NTG诱变处理嗜热链球菌IMAU80846的致死率
, figureFileSmall=null, figureFileBig=null, tableContent=
| Concentration of NTG (μg/mL) | Viable cell counts (CFU/mL) | Lethality (%) |
| The lowercase letters in the table indicate the significance of the difference in lethality at different concentrations (P<0.05). |
| 0 | (4.61±0.14)×109 | 0a |
| 100 | (2.77±0.17)×109 | 39.91b |
| 300 | (1.85±0.11)×109 | 59.87c |
| 500 | (1.63±0.13)×109 | 64.64c |
| 700 | (0.52±0.04)×109 | 88.72d |
| 900 | (0.07±0.01)×109 | 98.48e |
), ArticleFig(id=1241446123940926010, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=EN, label=Table 3, caption=
Lactose, galactose, glucose and lactic acid content in fermented milk ofStreptococcus thermophilus IMAU80846 and mutant strains
, figureFileSmall=null, figureFileBig=null, tableContent=
| Time | Lactose (g/100 g) | | Galactose (g/100 g) | | Glucose (g/100 g) | | Lactic acid (g/100 g) |
| IMAU80846 | IMAU80846Y | | IMAU80846 | IMAU80846Y | | IMAU80846 | IMAU80846Y | | IMAU80846 | IMAU80846Y |
| − indicates undetected; Lowercase letters indicate the significance of differences of the same substance at the same time (P<0.05). |
| 0 h | 4.85±0.015b | 4.89±0.017a | | 0.18±0.001a | 0.16±0.001b | | 0.12±0.002b | 0.24±0.003a | | − | − |
| 3 h | 4.40±0.013a | 4.17±0.012b | | 0.36±0.002b | 0.39±0.002a | | 0.26±0.004b | 0.40±0.006a | | 0.44±0.006b | 0.49±0.008a |
| 6 h | 3.43±0.010a | 3.24±0.009b | 0.41±0.003b | 0.46±0.004a | 0.24±0.003b | 0.48±0.007a | 0.58±0.010b | 0.64±0.013a |
| 0 d | 3.23±0.009a | 2.78±0.007b | 0.46±0.007a | 0.45±0.006b | − | 0.55±0.009 | 0.71±0.013b | 0.75±0.016a |
| 1 d | 3.03±0.008a | 2.54±0.006b | 0.47±0.007a | 0.40±0.005b | − | 0.53±0.008 | 0.78±0.015b | 0.83±0.017a |
| 3 d | 2.88±0.008a | 2.32±0.005b | 0.49±0.009a | 0.37±0.003b | − | − | 0.80±0.016b | 0.86±0.018a |
| 7 d | 2.80±0.007a | 2.29±0.005b | 0.50±0.010a | 0.36±0.003b | − | − | 0.81±0.017b | 0.88±0.020a |
| 14 d | 2.79±0.007a | 2.12±0.003b | | 0.51±0.120a | 0.27±0.002b | | − | − | | 0.82±0.019b | 0.90±0.023a |
), ArticleFig(id=1241446124096115266, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1241376210643636328, language=CN, label=表3, caption=
嗜热链球菌IMAU80846及突变株发酵乳中乳糖、半乳糖、葡萄糖、乳酸含量
, figureFileSmall=null, figureFileBig=null, tableContent=
| Time | Lactose (g/100 g) | | Galactose (g/100 g) | | Glucose (g/100 g) | | Lactic acid (g/100 g) |
| IMAU80846 | IMAU80846Y | | IMAU80846 | IMAU80846Y | | IMAU80846 | IMAU80846Y | | IMAU80846 | IMAU80846Y |
| − indicates undetected; Lowercase letters indicate the significance of differences of the same substance at the same time (P<0.05). |
| 0 h | 4.85±0.015b | 4.89±0.017a | | 0.18±0.001a | 0.16±0.001b | | 0.12±0.002b | 0.24±0.003a | | − | − |
| 3 h | 4.40±0.013a | 4.17±0.012b | | 0.36±0.002b | 0.39±0.002a | | 0.26±0.004b | 0.40±0.006a | | 0.44±0.006b | 0.49±0.008a |
| 6 h | 3.43±0.010a | 3.24±0.009b | 0.41±0.003b | 0.46±0.004a | 0.24±0.003b | 0.48±0.007a | 0.58±0.010b | 0.64±0.013a |
| 0 d | 3.23±0.009a | 2.78±0.007b | 0.46±0.007a | 0.45±0.006b | − | 0.55±0.009 | 0.71±0.013b | 0.75±0.016a |
| 1 d | 3.03±0.008a | 2.54±0.006b | 0.47±0.007a | 0.40±0.005b | − | 0.53±0.008 | 0.78±0.015b | 0.83±0.017a |
| 3 d | 2.88±0.008a | 2.32±0.005b | 0.49±0.009a | 0.37±0.003b | − | − | 0.80±0.016b | 0.86±0.018a |
| 7 d | 2.80±0.007a | 2.29±0.005b | 0.50±0.010a | 0.36±0.003b | − | − | 0.81±0.017b | 0.88±0.020a |
| 14 d | 2.79±0.007a | 2.12±0.003b | | 0.51±0.120a | 0.27±0.002b | | − | − | | 0.82±0.019b | 0.90±0.023a |
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