CN108823131B - 一株高产阿魏酸酯酶的发酵乳杆菌及其应用 - Google Patents
一株高产阿魏酸酯酶的发酵乳杆菌及其应用 Download PDFInfo
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Abstract
本发明公开了一株新鲜玉米青贮来源的高产阿魏酸酯酶的发酵乳杆菌及其应用。本发明提供的发酵乳杆菌为发酵乳杆菌Lactocacillus fermentium 17SD‑2。通过实验证明:本发明的发酵乳杆菌Lactobacillus fermentum 17SD‑2 CGMCC No.15448可分泌阿魏酸酯酶,具有降解植物细胞壁致密网状结构的功能,可用于提高高纤维青贮原料中纤维素消化率、改善青贮原料适口性、提高青贮原料利用率及提高动物体生长性能,同时还具有产酸快、繁殖周期短、生长快,对人畜无毒害,不污染环境等特点,不仅对提高农牧产品的品质和保护环境具有非常重要的意义,而且也顺应了环境保护、生态平衡的社会发展需求。
Description
技术领域
本发明涉及一株新鲜玉米青贮来源的发酵乳杆菌,可高效分泌阿魏酸酯酶,并加快青贮酸性环境的构建,还有助于降解饲草中纤维含量,可应用于高纤维饲草青贮及深加工。
背景技术
随着农业经济快速发展,农民生活条件和农村燃料结构改变,作物秸秆逐渐变为农产品废弃物,秸秆焚烧成为春秋两季农忙时节的标志性现象。但采用田间焚烧或废弃,不仅导致了环境污染和资源浪费,存在火灾和交通事故隐患,同时也破坏了土壤抗旱保湿能力,严重制约了农业的可持续发展。因此如何有效、合理的利用农作物秸秆是已成为亟需解决的社会性问题。贮存饲料来源于植物性原材料,秸秆是其中的一种。由于纤维素、半纤维素和木质素之间存在着不同的结合力,使得其结构稳定,在自然界中,很难降解,通常借助酸碱腐蚀等方法进行秸秆的预处理,方可再利用,然而,强酸强碱对生态环境危害很大。
阿魏酸酯酶(Ferulic acid esterase,FAE)是羧酸酯水解酶的一个亚类。阿魏酸酯酶可催化水解植物细胞壁中多糖与木质素之间的酯键交联,破坏植物细胞壁的致密网状结构,释放阿魏酸、二聚阿魏酸等酚酸类物质,且释放出来的阿魏酸具有抗炎、防止动脉硬化等生理作用。
在饲料工业中,利用阿魏酸酯酶处理植物性原材料,可以将阿魏酸从植物细胞壁的结构中游离出来,从而破坏细胞壁的骨架结构,使得木质素、半纤维素及纤维素之间的连接被部分打破,结构变得比处理前疏松,变得疏松的原料更容易被牲畜消化吸收利用,更有利于提高饲料的利用效率、提高高纤维青贮饲料的消化率和改善动物生长性能。目前所用的阿魏酸酯酶主要是靠野生真菌传统发酵而来,发酵时间长,酶活低而且成本大,不利于大规模的生产,产量更不能满足目前的市场需求。
发明内容
本发明的一个目的是提供一株新鲜玉米青贮来源的高产阿魏酸酯酶的发酵乳杆菌Lactobacillus fermentum 17SD-2。
本发明提供的发酵乳杆菌Lactobacillus fermentum 17SD-2的保藏编号为CGMCCNo.15448。
本发明提供的发酵乳杆菌Lactobacillus fermentum 17SD-2的分类命名为发酵乳杆菌Lactobacillus fermentum,该菌株已于2018年3月12日保藏于中国微生物菌种保藏管理委员会普通微生物中心(简称CGMCC,地址:北京市朝阳区北辰西路1号院3号,中国科学院微生物研究所,邮编100101),保藏编号为CGMCC No.15448。
本发明的另一个目的是提供上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液的新用途。
本发明提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在产阿魏酸酯酶中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备产阿魏酸酯酶的产品中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在降解植物细胞壁中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备降解植物细胞壁的产品中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在降解阿魏酸乙酯中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备降解阿魏酸乙酯的产品中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在黄贮或青贮中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备黄贮或青贮的产品中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在提高动物体生长性能中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备提高动物体生长性能的产品中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在提高青贮原料消化率或改善青贮原料适口性或提高青贮原料利用率中的应用。
本发明还提供了上述发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备提高青贮原料消化率或改善青贮原料适口性或提高青贮原料利用率的产品中的应用。
上述应用中,所述发酵乳杆菌Lactobacillus fermentum为发酵乳杆菌Lactobacillus fermentum 17SD-2CGMCC No.15448。
本发明还有一个目的是提供一种产品。
本发明提供的产品的活性成分为发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液;
所述产品具有如下1)-7)中任一种的功能:
1)产阿魏酸酯酶;
2)降解植物细胞壁;
3)降解阿魏酸乙酯;
4)提高青贮原料消化率;
5)改善青贮原料适口性;
6)提高青贮原料利用率;
7)提高动物体生长性能。
上述产品中,所述提高青贮原料消化率为提高高纤维青贮原料的纤维素消化率。
上述产品中,所述发酵乳杆菌Lactobacillus fermentum为发酵乳杆菌Lactobacillus fermentum 17SD-2CGMCC No.15448。
上述应用或产品中,所述发酵乳杆菌制剂的制备方法如下:将发酵乳杆菌Lactobacillus fermentum 17SD-2CGMCC No.15448接种至MRS液体培养基或改良的MC液体培养基或BHI脑心浸液琼脂培养基中,在30℃或37℃恒温箱中发酵培养24h,得到17SD-2发酵液,17SD-2发酵液在10000-12000rpm条件下离心2-5min,收集上清液,即为所述发酵乳杆菌制剂。
本发明从新鲜玉米青贮饲料中分离得到一株发酵乳杆菌Lactobacillusfermentum 17SD-2,其保藏编号为CGMCC No.15448。通过实验证明:发酵乳杆菌Lactobacillus fermentum 17SD-2CGMCC No.15448可分泌阿魏酸酯酶,具有降解植物细胞壁致密网状结构的功能,可用于提高高纤维青贮原料中纤维素消化率、改善青贮原料适口性、提高青贮原料利用率及提高动物体生长性能,同时本发明提供的发酵乳杆菌Lactobacillus fermentum 17SD-2CGMCC No.15448还具有产酸快、繁殖周期短、生长快,对人畜无毒害,不污染环境等特点,不仅对提高农牧产品的品质和保护环境具有非常重要的意义,而且也顺应了环境保护、生态平衡的社会发展需求。
附图说明
图1为17SD-2发酵液上清降解阿魏酸乙酯产生透明圈的分析结果。
图2为HPLC法定量分析17SD-2发酵液上清中阿魏酸含量。
保藏说明
菌种名称:发酵乳杆菌
拉丁名:Lactobacillus fermentum
菌株编号:17SD-2
保藏机构:中国微生物菌种保藏管理委员会普通微生物中心
保藏机构简称:CGMCC
地址:北京市朝阳区北辰西路1号院3号
保藏日期:2018年3月12日
保藏中心登记入册编号:CGMCC No.15448
具体实施方式
下述实施例中所使用的实验方法如无特殊说明,均为常规方法。
下述实施例中所用的材料、试剂等,如无特殊说明,均可从商业途径得到。
下述实施例中的定量试验,均设置三次重复实验,结果取平均值。
实施例1、17SD-2菌株的分离与鉴定
一、17SD-2菌株的分离
17SD-2分离自新鲜玉米青贮。具体分离方法如下:取新鲜玉米青贮10g,加90mL生理盐水,依次将其稀释到10-7,选取适宜的梯度涂布于MRS培养基(1L MRS培养基配方为牛肉膏10g,酪蛋白胨10g,酵母提取物5g,葡萄糖20g,乙酸钠5g,柠檬酸氢二胺2g,Tween80 1mL,K2HPO4 2g,MgSO4·7H2O 0.58g,MnSO4·7H2O 0.25g,琼脂粉1.5%,双蒸水定容到lL,高压灭菌)或改良的MC培养基(1L改良的MC培养基配方为大豆蛋白胨5g,牛肉浸粉3g,酵母浸粉3g,葡萄糖20g,乳糖20g,碳酸钙10g,琼脂粉1.5%,双蒸水定容到lL,高压灭菌)或BHI脑心浸液琼脂培养基(1L BHI脑心浸液琼脂培养基配方为牛脑浸粉12.5g,牛心浸粉5.0g,蛋白胨10.0g,葡萄糖2.0g,磷酸氢二钠2.5g,氯化钠5.0g,琼脂粉1.5%,双蒸水定容到lL,高压灭菌)。平板置于30℃或37℃培养箱中培养24h后,挑取边缘圆滑的单克隆在MRS液体培养基或改良的MC液体培养基或BHI脑心浸液中培养。过夜培养后检测培养液上清是否能降解阿魏酸乙酯产生透明圈。最终发现一株菌的发酵液上清可降解阿魏酸乙酯产生明显的透明圈,将其命名为17SD-2。
二、17SD-2菌株的鉴定
提取17SD-2菌株的基因组DNA,利用引物(27F:5’-AGAGTTTGA TCCTGGCTCAG-3'和1492R:5'-GGTTACCTTGTTACGACTT-3)对16S rRNA序列进行扩增,得到PCR产物。并对PCR产物进行测序。
测序结果表明:PCR产物的核苷酸序列如序列1所示,将此序列在NCBI网站(https://blast.ncbi.nlm.nih.gov/Blast.cgi)进行比对分析。
经过比对,鉴定17SD-2菌株为发酵乳杆菌,其分类命名为发酵乳杆菌Lactobacillus fermentum,该菌株已于2018年3月12日保藏于中国微生物菌种保藏管理委员会普通微生物中心(简称CGMCC,地址:北京市朝阳区北辰西路1号院3号,中国科学院微生物研究所,邮编100101),保藏编号为CGMCC No.15448。
实施例2、微生物制剂17SD-2的制备
1、将实施例1中分离纯化到的17SD-2菌株接种至MRS液体培养基中,37℃恒温箱中发酵培养72h,得到17SD-2发酵液。
2、将步骤1获得的17SD-2发酵液在10000-12000rpm条件下离心2-5min,收集上清液,得到17SD-2发酵液上清(17SD-2菌株浓度为1014-1018CFU/L)。将17SD-2发酵液上清命名为微生物制剂17SD-2。
实施例3、微生物制剂17SD-2在降解阿魏酸乙酯中的应用
一、17SD-2发酵液上清降解阿魏酸乙酯产生透明圈
1、将不含有葡萄糖的MRS培养基冷却到50-55℃,然后将阿魏酸乙酯按0.1%(质量分数)的量加入到培养基中,倒板,制备得到阿魏酸乙酯为唯一碳源的平板。
2、用挖井打孔法在步骤1获得的阿魏酸乙酯为唯一碳源的平板上打孔,然后取10μL实施例2中制备的微生物制剂17SD-2加入孔中,37℃恒温箱中放置48-72小时,同时以生理盐水作为阴性对照。
结果如图1所示。结果表明:微生物制剂17SD-2可降解阿魏酸乙酯,产生明显的透明圈。说明微生物制剂17SD-2中含有阿魏酸酯酶,可降解阿魏酸乙酯。
二、阿魏酸含量分析
1、将不含有葡萄糖的MRS培养基冷却到50-55℃,然后将阿魏酸乙酯按0.1%(质量分数)的量加入到培养基中,制备得到阿魏酸乙酯为唯一碳源的培养基。
2、将17SD-2接种至步骤1获得的阿魏酸乙酯为唯一碳源的培养基中,在37℃恒温箱中发酵培养72h,得到17SD-2发酵液。
3、将步骤2获得的17SD-2发酵液在10000-12000rpm条件下离心2-5min,收集上清液,得到17SD-2发酵液上清(17SD-2菌株浓度为1014-1018CFU/L)。
4、将步骤3获得的17SD-2发酵液上清稀释并过0.22μm滤膜后,利用HPLC法(岛津LC-20AT)定量分析17SD-2发酵液上清中的阿魏酸含量。同时以阿魏酸乙酯为唯一碳源的培养基作为空白对照。
HPLC检测仪器型号及检测条件如下:Wondasil C18-S/N 4K9702-03,Made inJapan,柱检测波长:320nm;流动相:含有1‰三氟乙酸的100%乙腈;柱温:40℃;洗脱浓度:30%乙腈。
结果如图2所示。结果表明:17SD-2菌株可利用阿魏酸乙酯产生阿魏酸,且发酵液上清中阿魏酸峰面积为1735908,阿魏酸浓度可达到483.8673mg/L。
序列表
<110>中国科学院微生物研究所
<120>一种高产阿魏酸酯酶的发酵乳杆菌及其应用
<160>1
<170>PatentIn version 3.5
<210>1
<211>1456
<212>DNA
<213>人工序列(Artificial Sequence)
<400>1
ctataatgca agtcgaacgc gttggcccaa ttgattgatg gtgcttgcac ctgattgatt 60
ttggtcgcca acgagtggcg gacgggtgag taacacgtag gtaacctgcc cagaagcggg 120
ggacaacatt tggaaacaga tgctaatacc gcataacanc gttgttcgca tgaacaacgc 180
ttaaaagatg gcttctcgct atcacttctg gatggacctg cggtgcatta gcttgttggt 240
ggggtaacgg cctaccaagg cgatgatgca tagccgagtt gagagactga tcggccacaa 300
tgggactgag acacggccca tactcctacg ggaggcagca gtagggaatc ttccacaatg 360
ggcgcaagcc tgatggagca acaccgcgtg agtgaagaag ggtttcggct cgtaaagctc 420
tgttgttaaa gaagaacacg tatgagagta actgttcata cgttgacggt atttaaccag 480
aaagtcacgg ctaactacgt gccagcagcc gcggtaatac gtaggtggca agcgttatcc 540
ggatttattg ggcgtaaaga gagtgcaggc ggttttctaa gtctgatgtg aaagccttcg 600
gcttaaccgg agaagtgcat cggaaactgg ataacttgag tgcagaagag ggtagtggaa 660
ctccatgtgt agcggtggaa tgcgtagata tatggaagaa caccagtggc gaaggcggct 720
acctggtctg caactgacgc tgagactcga aagcatgggt agcgaacagg attagatacc 780
ctggtagtcc atgccgtaaa cgatgagtgc taggtgttgg agggtttccg cccttcagtg 840
ccggagctaa cgcattaagc actccgcctg gggagtacga ccgcaaggtt gaaactcaaa 900
ggaattgacg ggggcccgca caagcggtgg agcatgtggt ttaattcgaa gctacgcgaa 960
gaaccttacc aggtcttgac atcttgcgcc aaccctagag atagggcgtt tccttcggga 1020
acgcaatgac aggtggtgca tggtcgtcgt cagctcgtgt cgtgagatgt tgggttaagt 1080
cccgcaacga gcgcaaccct tgttactagt tgccagcatt aagttgggca ctctagtgag 1140
actgccggtg acaaaccgga ggaaggtggg gacgacgtca gatcatcatg ccccttatga 1200
cctgggctac acacgtgcta caatggacgg tacaacgagt cgcgaactcg cgagggcaag 1260
caaatctctt aaaaccgttc tcagttcgga ctgcaggctg caactcgcct gcacgaagtc 1320
ggaatcgcta gtaatcgcgg atcagcatgc cgcggtgaat acgttcccgg gccttgtaca 1380
caccgcccgt cacaccatga gagtttgtaa cacccaaagt cggtggggta accttttagg 1440
agccagccgc ctaagg 1456
Claims (8)
1. 一株发酵乳杆菌Lactobacillus fermentum 17SD-2,其保藏编号为CGMCCNo.15448。
2.发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在产阿魏酸酯酶中的应用;
或,发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备产阿魏酸酯酶的产品中的应用;
所述发酵乳杆菌Lactobacillus fermentum为权利要求1所述的发酵乳杆菌Lactobacillus fermentum 17SD-2 CGMCC No.15448;
所述应用均为非疾病治疗应用。
3.发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在降解植物细胞壁中的应用;
或,发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备降解植物细胞壁的产品中的应用;
所述发酵乳杆菌Lactobacillus fermentum为权利要求1所述的发酵乳杆菌Lactobacillus fermentum 17SD-2 CGMCC No.15448;
所述应用均为非疾病治疗应用。
4.发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在降解阿魏酸乙酯中的应用;
或,发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备降解阿魏酸乙酯的产品中的应用;
所述发酵乳杆菌Lactobacillus fermentum为权利要求1所述的发酵乳杆菌Lactobacillus fermentum 17SD-2 CGMCC No.15448。
5.发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在黄贮或青贮中的应用;
或,发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备黄贮或青贮的产品中的应用;所述发酵乳杆菌Lactobacillusfermentum为权利要求1所述的发酵乳杆菌Lactobacillus fermentum 17SD-2 CGMCCNo.15448。
6.发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在提高动物体生长性能中的应用;
或,发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备提高动物体生长性能的产品中的应用;
所述应用为非疾病诊断治疗应用;
所述发酵乳杆菌Lactobacillus fermentum为权利要求1所述的发酵乳杆菌Lactobacillus fermentum 17SD-2 CGMCC No.15448。
7.发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在提高青贮原料消化率或改善青贮原料适口性或提高青贮原料利用率中的应用;
或,发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液在制备提高青贮原料消化率或改善青贮原料适口性或提高青贮原料利用率的产品中的应用;
所述发酵乳杆菌Lactobacillus fermentum为权利要求1所述的发酵乳杆菌Lactobacillus fermentum 17SD-2 CGMCC No.15448;
所述应用均为非疾病治疗应用。
8.一种产品,其活性成分为发酵乳杆菌Lactobacillus fermentum或其制剂或其发酵液或其代谢液或其菌悬液或其培养液;
所述产品具有如下1)-7)中任一种的功能:
1)产阿魏酸酯酶;
2)降解植物细胞壁;
3)降解阿魏酸乙酯;
4)提高青贮原料消化率;
5)改善青贮原料适口性;
6)提高青贮原料利用率;
7)提高动物体生长性能;
所述发酵乳杆菌Lactobacillus fermentum为权利要求1所述的发酵乳杆菌Lactobacillus fermentum 17SD-2 CGMCC No.15448。
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CN104336416A (zh) * | 2014-11-03 | 2015-02-11 | 郑州大学 | 一株植物乳杆菌及其在苜蓿青贮中的应用 |
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