CN116836892B - 一种同时产生香豆素和水杨酸的5406链霉菌培养方法 - Google Patents
一种同时产生香豆素和水杨酸的5406链霉菌培养方法 Download PDFInfo
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Abstract
本发明公开了一种同时产生香豆素和水杨酸的5406链霉菌培养方法,该方法是在普通高氏一号培养基中添加添加萘乙酸和谷氨酸进行5406链霉素培养同时生产获得香豆素和水杨酸。本发明首次解决同时产生香豆素和水杨酸的5406链霉菌发酵的问题,操作简单。
Description
技术领域
本发明涉及微生物发酵技术领域,具体涉及一种同时产生香豆素和水杨酸的5406链霉菌培养方法。
背景技术
5406链霉菌,又称泾阳链霉菌(Streptomyces jingyanggensis),是植物根际促生菌(Plant growth promoting rhizobacteria,PGPR)的典型代表。5406链霉菌在我国作为抗生菌肥料已有多年,是从我国陕西泾阳等地土壤中分离到的,通过分类研究定名为泾阳链霉菌,5406为这个新种的典型菌株,在中国农业微生物菌种保藏管理中心菌种保藏号为ACCC40021,在中国普通微生物菌种保藏管理中心的保藏编号为4.891。5406链霉菌不仅能抑制30多种病原菌的生长,同时还具有刺激植物生根、发芽等性能。5406链霉菌能产生抗病物质起到防治植物病害的作用,但其产生的具体物质、以及同时产生香豆素和水杨酸的培养方法尚无报道。
发明内容
本发明旨在提供一种同时产生香豆素和水杨酸的5406链霉菌培养方法,以填补现有技术的空白。
本发明技术方案如下:
一种同时产生香豆素和水杨酸的5406链霉菌培养方法,包括以下步骤:
(1)5406链霉菌活化;
(2)培养基配方及配制:在高氏一号液体培养基中添加萘乙酸和谷氨酸;
(3)5406链霉菌培养:取活化后的5406链霉菌单菌落,接种在步骤(2)所述培养基中,震荡培养5-6 d。
优选的,萘乙酸和谷氨酸在培养基中的添加量分别为萘乙酸0.05~0.15 g/L、谷氨酸5~15 g/L。
优选的,萘乙酸和谷氨酸在培养基中的添加量分别为萘乙酸0.1 g/L、谷氨酸10g/L。
优选的,震荡培养的条件为转速250±50 rpm、温度30±2℃。
优选的,震荡培养的时间为至少5 d。
优选的,震荡培养的时间为5-6 d。
与现有技术相比,本发明的有益成果在于:
(1)本发明提供了一种同时产生香豆素和水杨酸的5406链霉菌培养方法,填补了5406链霉菌同时产生香豆素和水杨酸的发酵技术方面的空白。
(2)本发明在高氏一号培养基的基础上,同时添加萘乙酸和谷氨酸进行发酵,可同时生产得到香豆素和水杨酸。
(3)本发明方法简单、操作方便,利于科研工作者的研究。
附图说明
图1:质谱多反应监测模式示意图
具体实施方式
为使本领域技术人员更好的理解本发明技术内容,下面结合具体实施例和附图对本发明做进一步的说明。
实施例1一种同时产生香豆素和水杨酸的5406链霉菌培养方法
(1)5406链霉菌活化:将5406链霉菌菌种(来源于中国普通微生物菌种保藏管理中心,编号CGMCC 4.891)从-80℃取出,在PDA无抗平板上划线,30℃培养2-3天。
(2)培养基配方及配制:配制高氏一号液体培养基(可溶性淀粉20g/L、KNO31g/L、K2HPO40.5g/L、MgSO4· 7H2O 0.5g/L、NaCl 0.5g/L、FeSO4· 7H2O 0.01g/L、pH=7.4-7.6)。配制时,先用少量冷水,将淀粉调成糊状,倒入少于所需水量的沸水中,在火上加热,边搅拌边依次逐一溶化其他成分。添加萘乙酸0.05g/L和谷氨酸5 g/L,溶化后,补足水分到1000ml,调pH,121℃灭菌20min。
(3)5406链霉菌培养:从活化的PDA平板挑起单菌落,接种在步骤(2)配制的培养基中,250±50rpm、30±2℃震荡培养5-6 d(本例优选6d)。
(4)激素含量测定:发酵液10000rpm离心10 min,去沉淀取上清液,-80 ℃保存,采用LC-MS/MS法测定瑞香素、水杨酸、茉莉酸含量。
方法如下:
样品提取:
1)将样品从-80 ℃冰箱中取出,解冻后,涡旋30 S混匀。
2)取适量液体样本,置于对应的已编号的50mL离心管中,-80℃冰箱中冷冻一夜,真空冷冻干燥。
3)冻干后,按照浓缩30倍比例加入70%甲醇含内标提取液,比如9mL样本冻干后加入300μL提取剂,6mL样本冻干加入200μL提取剂。
4)涡旋15 min,冰水浴超声(KQ5200E)10min。12000 r/min,4℃条件下离心(5424R ,Eppendorf)3min。
5)移取上清液,用微孔滤膜(0.22 μm pore size)过滤后,保存于进样瓶中,用于LC-MS/MS检测。
色谱质谱采集条件:
数据采集仪器系统主要包括超高效液相色谱(Ultra Performance LiquidChromatography,UPLC)(ExionLC™ AD,https://sciex.com.cn/)和串联质谱(Tandemmass spectrometry,MS/MS)(Applied Biosystems 6500 QTRAP,https://sciex.com.cn/)。
液相条件主要包括:
1)色谱柱:AgilentSB-C18 1.8 µm,2.1 mm * 100 mm;
2)流动相:A相为超纯水(加入0.1%的甲酸),B相为乙腈(加入0.1%的甲酸);
3)洗脱梯度: 0.00 min B相比例为5%,9.00 min内B相比例线性增加到95%,并维持在95% 1 min,10.00-11.10 min,B相比例降为5%,并以5%平衡至14 min;
4)流速0.35 mL/min;柱温40°C;进样量2 μL。
质谱条件主要包括:
电喷雾离子源(electrospray ionization,ESI)温度500°C;离子喷雾电压(IS)5500 V(正离子模式)/-4500 V(负离子模式);离子源气体I(GSI),气体II(GSII)和气帘气(CUR)分别设置为50、60和25 psi,碰撞诱导电离参数设置为高。QQQ扫描使用MRM模式,并将碰撞气体(氮气)设置为中等。通过进一步的去簇电压(declustering potential, DP)和碰撞能(collision energy,CE)优化,完成了各个MRM离子对的DP和CE。根据每个时期内洗脱的代谢物,在每个时期监测一组特定的MRM离子对。
代谢物定性与定量:
基于自建数据库MWDB(metware database),根据二级谱信息进行物质定性,分析时去除了同位素信号,含K+离子、Na+离子、NH4 +离子的重复信号,以及本身是其他更大分子量物质的碎片离子的重复信号。
代谢物定量是利用三重四级杆质谱的多反应监测模式(multiple reactionmonitoring,MRM,如下图1)分析完成。MRM模式中,四级杆首先筛选目标物质的前体离子(母离子),排除掉其他分子量物质对应的离子以初步排除干扰;前体离子经碰撞室诱导电离后断裂形成很多碎片离子,碎片离子再通过三重四级杆过滤选择出所需要的一个特征碎片离子,排除非目标离子干扰,使定量更为精确,重复性更好。获得不同样本的代谢物质谱分析数据后,对所有物质色谱峰进行峰面积积分,并对其中同一代谢物在不同样本中的质谱出峰进行积分校正(Fraga et al.2010)。
实施例2一种同时产生香豆素和水杨酸的5406链霉菌培养方法
(1)5406链霉菌活化:将5406链霉菌菌种从-80℃取出,在PDA无抗平板上划线,30℃培养2-3天。
(2)培养基配方及配制:配制高氏一号液体培养基(可溶性淀粉20g/L、KNO31g/L、K2HPO40.5g/L、MgSO4· 7H2O 0.5g/L、NaCl 0.5g/L、FeSO4· 7H2O 0.01g/L、pH=7.4-7.6)。配制时,先用少量冷水,将淀粉调成糊状,倒入少于所需水量的沸水中,在火上加热,边搅拌边依次逐一溶化其他成分。添加萘乙酸0.1 g/L和谷氨酸10 g/L,溶化后,补足水分到1000ml,调pH,121℃灭菌20min。
(3)5406链霉菌培养:从活化的PDA平板挑起单菌落,接种在步骤(2)配制的培养基中,250±50rpm、30±2℃震荡培养5-6 d(本例优选6d)。
(4)激素含量测定:发酵液10000rpm离心10 min,去沉淀取上清液,采用LC-MS/MS法测定瑞香素、水杨酸、茉莉酸含量。
实施例3一种同时产生香豆素和水杨酸的5406链霉菌培养方法
(1)5406链霉菌活化:将5406链霉菌菌种从-80℃取出,在PDA无抗平板上划线,30℃培养2-3天。
(2)培养基配方及配制:配制高氏一号液体培养基(可溶性淀粉20g/L、KNO31g/L、K2HPO40.5g/L、MgSO4· 7H2O 0.5g/L、NaCl 0.5g/L、FeSO4· 7H2O 0.01g/L、pH=7.4-7.6)。配制时,先用少量冷水,将淀粉调成糊状,倒入少于所需水量的沸水中,在火上加热,边搅拌边依次逐一溶化其他成分。添加萘乙酸0.15 g/L和谷氨酸 15g/L,溶化后,补足水分到1000ml,调pH,121℃灭菌20min。
(3)5406链霉菌培养:从活化的PDA平板挑起单菌落,接种在步骤(2)配制的培养基中,250±50rpm、30±2℃震荡培养5-6 d(本例优选6d)。
(4)激素含量测定:发酵液10000rpm离心10 min,去沉淀取上清液,采用LC-MS/MS法测定瑞香素、水杨酸、茉莉酸含量。
对比例1一种同时产生香豆素和水杨酸的5406链霉菌培养方法
(1)5406链霉菌活化:将5406链霉菌菌种从-80℃取出,在PDA无抗平板上划线,30℃培养2-3天。
(2)培养基配方及配制:配制高氏一号液体培养基(可溶性淀粉20g/L、KNO31g/L、K2HPO40.5g/L、MgSO4· 7H2O 0.5g/L、NaCl 0.5g/L、FeSO4· 7H2O 0.01g/L、pH=7.4-7.6)。配制时,先用少量冷水,将淀粉调成糊状,倒入少于所需水量的沸水中,在火上加热,边搅拌边依次逐一溶化其他成分。溶化后,补足水分到1000ml,调pH,121℃灭菌20min。
(3)5406链霉菌培养:从活化的PDA平板挑起单菌落,接种在步骤(2)配制的培养基中,250±50rpm、30±2℃震荡培养5-6 d(本例优选6d)。
(4)激素含量测定:发酵液10000rpm离心10 min,去沉淀取上清液,采用LC-MS/MS法测定瑞香素、水杨酸、茉莉酸含量。
为了说明本发明的效果,分别统计了前述实施例和对比例的生长素和细胞分裂素浓度。每组3次重复。结果见下表。
对比例2一种同时产生香豆素和水杨酸的5406链霉菌培养方法
(1)5406链霉菌活化:将5406链霉菌菌种从-80℃取出,在PDA无抗平板上划线,30℃培养2-3天。
(2)培养基配方及配制:配制高氏一号液体培养基(可溶性淀粉20g/L、KNO31g/L、K2HPO40.5g/L、MgSO4· 7H2O 0.5g/L、NaCl 0.5g/L、FeSO4· 7H2O 0.01g/L、pH=7.4-7.6)。配制时,先用少量冷水,将淀粉调成糊状,倒入少于所需水量的沸水中,在火上加热,边搅拌边依次逐一溶化其他成分。添加萘乙酸0.1 g/L,溶化后,补足水分到1000ml,调pH,121℃灭菌20min。
(3)5406链霉菌培养:从活化的PDA平板挑起单菌落,接种在步骤(2)配制的培养基中,250±50rpm、30±2℃震荡培养5-6 d(本例优选6d)。
(4)激素含量测定:发酵液10000rpm离心10 min,去沉淀取上清液,采用LC-MS/MS法测定瑞香素、水杨酸、茉莉酸含量。
对比例3一种同时产生香豆素和水杨酸的5406链霉菌培养方法
(1)5406链霉菌活化:将5406链霉菌菌种从-80℃取出,在PDA无抗平板上划线,30℃培养2-3天。
(2)培养基配方及配制:配制高氏一号液体培养基(可溶性淀粉20g/L、KNO31g/L、K2HPO40.5g/L、MgSO4· 7H2O 0.5g/L、NaCl 0.5g/L、FeSO4· 7H2O 0.01g/L、pH=7.4-7.6)。配制时,先用少量冷水,将淀粉调成糊状,倒入少于所需水量的沸水中,在火上加热,边搅拌边依次逐一溶化其他成分。添加谷氨酸10 g/L,溶化后,补足水分到1000ml,调pH,121℃灭菌20min。
(3)5406链霉菌培养:从活化的PDA平板挑起单菌落,接种在步骤(2)配制的培养基中,250±50rpm、30±2℃震荡培养5-6 d(本例优选6d)。
(4)激素含量测定:发酵液10000rpm离心10 min,去沉淀取上清液,采用LC-MS/MS法测定瑞香素、水杨酸、茉莉酸含量。
表1
注:氧化戊烯基环戊烷丁酸,英文名称:3-oxo-2-(2-(Z)-Pentenyl)cyclopentane-1-butyric acid,CAS号:136845-17-5。
研究结果表明,比较实施例和对比例1可知,本发明在高氏一号培养基基础上,同时添加萘乙酸0.05-0.15 g/L和5-15 g/L 谷氨酸,5406链霉菌可同时发酵生产瑞香素和水杨酸。
以上所述仅为本发明的部分实施例而已,并不用限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (2)
1.一种同时产生瑞香素和水杨酸的5406链霉菌培养方法,其特征在于,包括以下步骤:
(1)5406链霉菌活化;所述5406链霉菌来源于中国普通微生物菌种保藏管理中心,保藏编号CGMCC 4.891;
(2)培养基配方及配制:在高氏一号液体培养基中添加萘乙酸和谷氨酸,萘乙酸和谷氨酸在培养基中的添加量分别为萘乙酸0.05~0.15 g/L、谷氨酸5~15 g/L;
(3)5406链霉菌培养:取活化后的5406链霉菌单菌落,接种在步骤(2)所述培养基中,震荡培养;
震荡培养的条件为转速250±50 rpm、温度30±2℃,震荡培养的时间为5-6 d。
2.根据权利要求1所述的一种同时产生瑞香素和水杨酸的5406链霉菌培养方法,其特征在于,萘乙酸和谷氨酸在培养基中的添加量分别为萘乙酸0.1 g/L、谷氨酸10 g/L。
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