CN115948366B - 玉米ZmAGA1基因用于提高植物抗旱性的应用 - Google Patents
玉米ZmAGA1基因用于提高植物抗旱性的应用 Download PDFInfo
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- WQZGKKKJIJFFOK-PHYPRBDBSA-N alpha-D-galactose Chemical compound OC[C@H]1O[C@H](O)[C@H](O)[C@@H](O)[C@H]1O WQZGKKKJIJFFOK-PHYPRBDBSA-N 0.000 description 1
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Abstract
本发明公开了玉米ZmAGA1基因用于提高植物抗旱性的应用。本发明通过在玉米中激活ZmAGA1基因,提高了该基因的表达水平,提高了玉米的抗旱能力,进而证明了在植物中高表达玉米ZmAGA1基因可提高植物抗旱性。
Description
技术领域
本发明涉及玉米ZmAGA1基因的新应用,具体涉及通过提高玉米ZmAGA1基因表达水平用于提高玉米抗旱性应用。
背景技术
干旱严重威胁作物生产。棉子糖是植物中特有的一类游离寡糖,在干旱、高温、低温和高盐等逆境胁迫下被大量诱导积累,参与植物的抗旱、耐热、耐冷及耐盐等响应1-3。ZmAGA1基因(GRMZM2G340656)编码一个碱性α-半乳糖苷酶(EC 3.2.1.22),能将棉子糖水解为蔗糖和半乳糖4-5。
1.Downie,B.;Gurusinghe,S.;Dahal,P.;Thacker,R.R.;Snyder,J.C.;Nonogaki,H.;Yim,K.;Fukanaga,K.;Alvarado,V.;Bradford,K.J.,Expression of a GALACTINOLSYNTHASE gene in tomato seeds is up-regulated before maturation desiccationand again after imbibition whenever radicle protrusion is prevented.PlantPhysiol 2003,131(3),1347-59.
2.Koster,K.L.;Leopold,A.C.,Sugars and desiccation tolerance inseeds.Plant Physiol1988,88(3),829-32.
3.Egert,A.;Eicher,B.;Keller,F.;Peters,S.,Evidence for water deficit-induced mass increases of raffinose family oligosaccharides(RFOs)in theleaves of three Craterostigma resurrection plant species.Front Physiol 2015,6,206.
4.Porter,J.E.;Herrmann,K.M.;Ladisch,M.R.,Integral kinetics ofα-galactosidase purified from Glycine max for simultaneous hydrolysis ofstachyose and raffinose.1990,35(1),15-22.
5.Kuo,T.M.,Contente of raffinose oligosaccharides and sucrose invarious plant seeds.J.Agric.Food Chem.1988,36,32-36.
发明内容
本发明发现并鉴定了玉米ZmAGA1基因(GRMZM2G340656)突变体提高了ZmAGA1基因的表达量,增强植物的抗旱能力。基于此,本发明提供了玉米ZmAGA1基因用于提高植物抗旱性的应用,所述玉米ZmAGA1基因序列如SEQ ID NO:1所示,或者,所述玉米ZmAGA1基因编码SEQ ID NO:2所示蛋白序列。
进一步,所述玉米ZmAGA1基因在植物中高表达提高植物抗旱性。
进一步,通过在玉米ZmAGA1基因5′端启动子处插入Mutator 1转座子实现玉米ZmAGA1基因在植物中的高表达;所述Mutator 1转座子插入序列如SEQ ID NO:3所示。
本发明同时提供了一种抗旱植物的育种方法。所提供的方法包括:在植物中高表达玉米ZmAGA1基因。进一步方案中,方法包括:通过在在玉米ZmAGA1基因5′端启动子处插入Mutator 1转座子实现玉米ZmAGA1基因在植物中的高表达;所述Mutator 1转座子插入序列如SEQ ID NO:3所示。
本发明还提供了抗旱玉米品系的育种方法。具体方案中所提供的方法包括:将玉米中的ZmAGA1基因进行激活提高其表达水平获得抗旱玉米品系。还有些具体方案中通过在在玉米ZmAGA1基因5′端启动子处插入Mutator 1转座子实现玉米ZmAGA1基因在玉米中的激活;所述Mutator 1转座子插入序列如SEQ ID NO:3所示。
附图说明
图1为实施例中玉米zmaga1纯合突变体鉴定;(A)为ZmAGA1基因结构及Mutator插入位点(即ZmAGA1翻译起始位点上游-1078bp处),黑色框表示基因编码序列,白色框表示5’UTR和3’UTR区;(B)为PCR鉴定NS及zmaga1纯合突变体,引物位置在图(A)标注;(C)为RT-PCR鉴定ZmAGA1的mRNA表达水平,显示ZmAGA1的mRNA在zmaga1纯合突变体中表达量较对照NS株系明显提高。叶片ZmGAPDH为内参;(D)为Western blot鉴定ZmAGA1的蛋白在zmaga1纯合突变体中表达量较对照NS株系明显提高;ZmGAPDH为内参;NS:zmaga1自交分离野生型;zmaga1:ZmAGA1纯合突变体。
图2为zmaga1纯合突变体干旱表型鉴定;(A)为zmaga1纯合突变体和NS干旱处理前的表型;(B)为zmaga1纯合突变体和NS干旱处理后的表型;(C)为zmaga1纯合突变体和NS干旱处理后并复水恢复5天的表型;标尺5cm;NS:zmaga1自交分离野生型;zmaga1:ZmAGA1纯合突变体。
图3为zmaga1纯合突变体较对照NS株系抗旱能力提高;(A)zmaga1纯合突变体干旱处理后幼苗存活率较对照NS株系显著升高。数据表示均值±标准误;(B)zmaga1纯合突变体干旱处理后幼苗电导率较对照NS株系显著降低,数据表示均值±标准误,*表示NS与zmaga1之间差异显著,(Student’s t-test,p<0.05);***表示NS与zmaga1之间差异显著,(Student’s T-test,p<0.001);NS:zmaga1自交分离野生型;zmaga1:ZmAGA1纯合突变体。
具体实施方式
除非另有说明,本文中的术语根据相关领域技术人员的常规认识理解。
以下是发明人提供的具体实施例,以对本发明的技术方案做进一步解释说明。如无特殊说明以下实施例所用试剂及材料均为市售产品。
实施例:
该实施例中发明人获得并鉴定了一个转座子插入zmaga1突变体,该突变体ZmAGA1基因的mRNA和蛋白表达水平提高,植株抗旱。
该实施例所用引物序列如下,由生工生物工程(上海)股份有限公司合成;
ZmAGA1-F:5′AGGCTAGTTTGTCGAGCGTC-3′
ZmAGA1-R:5′GAGTAGACGAGCATCAGGGC-3′
TIR6:5′AGAGAAGCCAACGCCAWCGCCTCYATTTCGTC-3′
zmaga1杂合突变体材料来自ChinaMu突变体库(http://chinamu.jaas.ac.cn);
zmaga1纯合突变系为zmaga1杂合突变体自交分离产生;
野生型(NS)为zmaga1杂合突变体自交分离产生的对照株系。
通过对zmaga1自交产生分离的纯合突变株系和自交分离野生型(NS)进行zmaga1突变体鉴定(图1);
利用基因特异性引物ZmAGA1-F和TIR6引物对zmaga1纯合突变株系进行PCR扩增并进行测序,测序结果为SEQ ID NO:4所示;
利用基因特异性引物ZmAGA1-R和TIR6引物对zmaga1纯合突变株系进行PCR扩增并进行测序,测序结果为SEQ ID NO:5所示;
以及ZmAGA1R和TIR6引物分别对zmaga1纯合突变株系进行PCR扩增并进行测序,测序结果为确定转座子插入位点位于ZmAGA1翻译起始位点上游-1078bp处(即玉米ZmAGA1基因5′端启动子处)。
进一步,利用RT-PCR对上述实施例中的野生型NS和zmaga1纯合突变体的ZmAGA1mRNA水平进行鉴定,结果显示zmaga1纯合突变体中ZmAGA1基因mRNA表达水平明显高于野生型(NS);
RT-PCR扩增程序为:95℃预变性3min;95℃变性15s,60℃退火15s,72℃延伸15s,30个循环;72℃终延伸8min;
RT-PCR特异性引物序列:
AGA1 RT-F 5’-AACGGCCTTCAGAGCCTGTC-3’
AGA1 RT-R 5’-GGCTTGGTCTGGAACTTGGT-3’
GAPDH RT-F:5’-CCCTTCATCACCACGGACTAC-3’
GAPDH RT-R:5’-AACCTTCTTGGCACCACCCT-3’
利用Western blot对上述野生型(NS)和zmaga1突变体的ZmAGA1蛋白水平进行鉴定,结果显示zmaga1纯合突变体中ZmAGA1基因蛋白表达水平明显高于野生型(NS)。
进一步,对上述实施例中的zmaga1纯合突变体和野生型NS的抗旱性鉴定:
将zmaga1纯合突变体及野生型NS种子分别在发芽纸上萌发3天,各取5粒发芽一致的种子种植于同一小盆中并进行控重,每小盆的最终质量控制在160g;幼苗培养条件为25℃,16光照/8h黑暗的光周期,培养至两叶期进行持续干旱处理(停止浇水15天),待表型出现后拍照记录,并浇水进行恢复处理,恢复5天后测定幼苗存活率和叶片电导率。
幼苗存活率测定:统计每个小盆中恢复后存活的幼苗数和总苗数,利用公式(存活数/幼苗总数)×100%计算幼苗存活率;利用Student’s t-test检测NS与zmaga1之间的差异显著性(*表示0.01<p<0.05;**表示0.001<p<0.01;***表示p<0.001)。
叶片电导率检测:将每盆中的5株幼苗混合,作为一个生物学重复,置于干净的试管中,加入15mL去离子水中,抽真空30min,25℃、120rpm处理1h后测定电导率,记录为k1;随后将叶片沸水浴20min,冷却至室温,混合均匀测定电导率,记录为k2;利用公式(k1-k0)/(k2-k0)×100%,计算叶片电导率,k0是去离子水的电导率;电导测定仪型号:雷磁DDS-307。
上述实施例说明在ZmAGA1翻译起始位点上游-1087bp处插入序列如SEQ ID NO:4所示转座子,使得纯合突变系中的ZmAGA1表达量升高,幼苗抗旱能力增强。适用于本发明的高表达实现或激活手段不限于此,本领域技术人员在本发明公开的基础上,结合公知常识可知,通过任何遗传学及分子生物学手段使得普通或现有玉米品系提高其ZmAGA1基因的表达量以获得/增强玉米抗旱性的现象均适用于本发明。
本发明所涉及核苷酸序列:
SEQ ID NO:1:
ZmAGA1基因核苷酸序列
(>GRMZM2G340656_chromosome:AGPv3:7:19063729:19083475:1)
ATGACGGTGACGCCACGGATCACGGTGAGCGACGGGCGGCTGACGGTGCGCGGCCGTACGGTGCTCACCGGCGTGCCGGACAACGTGTCGGCGGCGCACGCGGCCGGGGCGGGGCTCGTCGACGGGGCCTTCGTCGGCGCCCACGCCGGCGAGGCCAAGAGCCACCACGTCTTCACCTTCGGCACGCTCCGGGACTGCCGGTTCCTGTGCCTGTTCCGGTTCAAGCTGTGGTGGATGACGCAGCGGATGGGCGTCTCCGGCCGCGACGTCCCTCTGGAGACCCAGTTCATGCTCGTCGAGGTCCCTGCCAGTGACGGCGACGGCGACGACGCCCCCGCGTACGTGGTGATGCTTCCGCTGCTGGAGGGGCAGTTTCGGGCAGCGCTGCAGGGGAACGACCGCGACGAGCTGCAGATCTGCATCGAGAGCGGGGACAAGGCGGTGCAGACGGACCAGGCCGCGCACATGGTGTACCTCCACGCCGGCGACAACCCCTTCGACACCGTCACCGCCGCCGTCAAGGCGGTGGAGAAGCACCTGCAGACGTTCCACCACCGCGACAAGAAGAAGCTGCCGTCGTTCCTCGACTGGTTCGGCTGGTGCACCTGGGACGCCTTCTACACCGACGTCACCGCCGACGGCGTCAAACACGGCCTTCAGAGCCTGTCCAAGGGCGGCGCGCCGCCGCGGTTCCTCATCATCGACGACGGCTGGCAGCAGATCGCCTCCGAGAACAAGCCCGACCCCAACGTCGCCGTCCAGGAGGGCGCGCAATTCGCCAGCCGGCTGACCGGGATCAAGGAGAACACCAAGTTCCAGACCAAGCCCGACGGCGACGGCGACGGCGAGCAGGCGCCGGGCGGGCTGAAGCGACTGGTGGCCGAGACCAAGGACGCGCACGGCGTGAAGCAGGTGTACGTGTGGCACGCCATGGCCGGGTACTGGGGCGGCGTGACGCCGACGGCGGGGACGGCGATGGAGCGCTACGAGCCGGCGCTGGCGTACCCCGTGCAGTCCCCGGGCGTGACGGGCAACCAGCCGGACATCGTCATGGACTCGCTGTCCGTCCTGGGGCTGGGCCTGGTGCACCCGCGCCGGGTGCGGGACTTCTACGGCGAGCTCCACGCGTACCTCGCCTCCTGCGGCGTCGACGGCGTCAAGGTGGACGTGCAGAACATCATCGAGACGCTGGGCGCCGGCCACGGCGGCCGCGTCGCCATCACCCGCGCCTACCACCGCGCGCTCGAGGCCTCCGTGGCGCGCAGCTTCCCGGACAACGGCTGCATCTCCTGCATGTGCCACAACTCCGACATGCTCTACAGCGCCAGGCAGACTGCCGTCGTGCGCGCCTCCGACGACTTCTACCCGCGCGACCCGGCATCGCACACCGTCCACGTCGCCTCCGTCGCGTACAACACCGTCTTCCTCGGCGAGTTCATGCAGCCCGATTGGGACATGTTCCATAGCTTGCATCCGGCGGCGGAGTACCACGGCGCGGCGAGGGCCATCGGTGGCTGCCCGATATACGTCAGCGACAAGCCGGGGAACCACAACTTCGAGCTGCTCAGGAAGCTCGTGCTCCCCGACGGCACCGTGCTACGCGCGCAGCTTCCCGGCCGGCCCACACGGGACTGCCTCTTCTCCGACCCGGCGCGCGACGGCGCGAGTTTGCTCAAGATTTGGAACCTGAACAAGTGCGGTGGCGTGGTGGGTGTGTTCAACTGCCAGGGAGCCGGGTGGTGCCGCGTGACCAAGCGGACGCGCGTGCACGACGCGTCGCCGGGCACGCTGACCGGCACCGTGCGTGCCGACGACGTCGACGCCATAGCGCGCGTCGCTGGTGACGGCGGCGGGTGGGACGGCGAGACCGTGGTGTATGCGCACCGCACGCGGGAGCTAGTGCGACTGCCCCGGGGCGTCGCGCTGCCTGTGACGCTAGGCCCGCTCCAGTATGAGGTGTTCCATGTGTGCCCGCTCCGCGCCGTCGTGCCGGGGTTCTCGTTCGCGCCCGTCGGGCTGCTCGATATGTTCAACGCTGGGGGCGCCGTTGAGGAGTGCGACGTGATCAGCAATGTCGGCGGCAAGGCCATGGCTCTCAGGGTTCGCGGGTGCGGTCGGTTCGGCGCTTACTGCTCGCGGGAGCCGGCGAGGTGTCTATTGGACTCGGCGGAAGTGGAGTTCAGCTACGATGCCGACACCGGCCTCGTGTCCGTCGACCTGCCCGTGCCGGAGCAGGAGCTATATCGGTGGACGCTGGAGATTATGGTCTAG
SEQ ID NO:2:
ZmAGA1基因编码的蛋白序列
>GRMZM2G340656_chromosome:AGPv3:7:19063729:19083475:1
MTVTPRITVSDGRLTVRGRTVLTGVPDNVSAAHAAGAGLVDGAFVGAHAGEAKSHHVFTFGTLRDCRFLCLFRFKLWWMTQRMGVSGRDVPLETQFMLVEVPASDGDGDDAPAYVVMLPLLEGQFRAALQGNDRDELQICIESGDKAVQTDQAAHMVYLHAGDNPFDTVTAAVKAVEKHLQTFHHRDKKKLPSFLDWFGWCTWDAFYTDVTADGVKHGLQSLSKGGAPPRFLIIDDGWQQIASENKPDPNVAVQEGAQFASRLTGIKENTKFQTKPDGDGDGEQAPGGLKRLVAETKDAHGVKQVYVWHAMAGYWGGVTPTAGTAMERYEPALAYPVQSPGVTGNQPDIVMDSLSVLGLGLVHPRRVRDFYGELHAYLASCGVDGVKVDVQNIIETLGAGHGGRVAITRAYHRALEASVARSFPDNGCISCMCHNSDMLYSARQTAVVRASDDFYPRDPASHTVHVASVAYNTVFLGEFMQPDWDMFHSLHPAAEYHGAARAIGGCPIYVSDKPGNHNFELLRKLVLPDGTVLRAQLPGRPTRDCLFSDPARDGASLLKIWNLNKCGGVVGVFNCQGAGWCRVTKRTRVHDASPGTLTGTVRADDVDAIARVAGDGGGWDGETVVYAHRTRELVRLPRGVALPVTLGPLQYEVFHVCPLRAVVPGFSFAPVGLLDMFNAGGAVEECDVISNVGGKAMALRVRGCGRFGAYCSREPARCLLDSAEVEFSYDADTGLVSVDLPVPEQELYRWTLEIMV
SEQ ID NO:3:
Mutator1转座子序列
GTAATTTTGGGGAGAGATAATTGCCATTATGGACGAAGAGGGAAGGGGATTCGACGAAATGGAGGCGTTGGCGTTGGCTTCTCTGTTTTGGAGACGCACGCGACAGCCAAACTCCAAAACGGATACGAGACAGCTCTTGGGGCTGCGTAAACAGGTATTAGTTTTCTGTCCCCGTTTACCGTTCCCGTGCGCAGACGCCGTCACGCGTACTCTTCTTGTCTCCGTCGCCGCGCTCTACGGCAGCACGGCGGTGCTGGCGTACGTGCTGTACTCCGCGCCGGCAGAGGCCGCGCGCGCGTCGCCCGCGGACGACGCCACGCCGCTCCACCTCGCCGCGGCCGCGCACATCCTCCTCGCCGCGAGCGCGTCCGCGGACGCGCGCGCCTTCTCGGGCCTCCACGCCGGGGACCTCCTCCTCCCGCGCGCCAACGAGGCCGCCGCCGCCGCGGACCGGGCTCCGCGTGCTCCTCAAGTTCCCCGCGGTGTCACTGTCGTCCTCGCCCAAGAAGTCCGCCTCGCCGCCGCCGGCCCCGGAGGCGAGGAAGGAGTACCCGCCCGACCTGACGCTGCCGGACCTCAAGAGCGGGCTGTTCAGCACCGACGAGCAACGGACGCACCTTCCACCTGTCCTAGCACTAATTACTCCTAAATTCATCATACACCAAAGTTTCAATTAGTAAAAGGTTTTGGTATTATTTTCTTTACAAGACTAAAAGCATCCACTCGTATTTGCCATGGAAATATTGCCAAAATGGTTACCGAAGGAACCAATGAAAAATGGCGGTATCCGTCCACCTGTAGCTTGTCCAAGGCTCTTCCAGCAGAGTAGTGCCGCCATGACGATTGACAGAGACACGAGACGAAACAAGCTGAAGGTCCCCGCGGCGTCACTGTCGTCCTCGCCGAAGAAGTCCGCCTCGCCGCCGCCGGCCCCGGAGGCGAGGAAGGAGTACCCGCCCGACCTGACGCTGCCCACCGTGTCGCCGCCGCCGCCCAACGGCCTCGGCGACATGCTCAGCCCAGCGGCCTGGCCCTCCTCCCCCGCGAGCAGGCTCAACAAGGCCGCGCTCGGCGGCGGCCGGGACCTAGACCTAGACCAGTACCAGCACATGTTGTTCGACAAGGTGTCGTCGTCGAGGGCCAGTAGGAGACAAGAAGAGTACGCGTGACTGAGATGCGACGGAGAAAAAGGGTACGCGTGACGGCGTCTGTACACGGGAACGGTAAATGAGGACAGGAAACTAATAACTGTTTACGCAGCCCCAAGTGCTGTCTTGTGTCCGTTTTAGAGTTTGGCTGTCGCGTACGTCTCTAAAACAGAGAAGCCAACGCCAACGCCTCTATTTCGTCGAATCCGCTTCTCTCTTCGTCCATAATGGCAATTATCTCTTTTGGGGAAA
SEQ ID NO:4:
F+Mu转座子上游序列
CTTGCTAATGCGTTCGGCAAGGACGGTCAGCAGTCGTCTACAGTTGACGACAGTTAACTAGGCCGAGTG CCAGACGTTGACACTCGGCAAAAAACCCATTGCTGATGTACTGTTTACTGAGTCCTCTTTGCCAAAGAGATAATTGCCATTATGGACGAAGAGGGAAGGGGATTCGACGAAATGGAGGCGATGGCTTGGCTTCTCTAGA
SEQ ID NO:5:
R+Mu转座子下游序列
TATTAGAGGGGAAGCCCCAGCCAACGCCTCCATTTCGTCGAATCCGCTTCTCTCTTCGTCCATAATGGCAATTATCTCTTTGCCAAAAGTAACACTCGACAAAGAGTTTGCCAAGTGTTTTTTGGGAGCAATTGTGTCCGATAG TGATCTATACATCTATGAGGCAATCATATCTTCTTAAGTTCGCTTCGGCACTTAAGATATGTTTTGTTTAGCTTTC TGAACTTGATTCGCTGTTAAAAAAATTAGAATGTCAACCAAATAGATACAGCAGTGGAATAGATTTCTCCAATTTA ATTCAGAGTTACCTTCTACTATAGATTTTTCATATTCCTGTTATCCATGTTACACGCCGTTATTGTCTTATAGAAT CTATAGTTGAGAGTTATTTTAACCAAATAAATTATAGTTTTTTCATAATTATCAGTTTACAATTATAATCAGATTT TCAGGAATCTAAATTAAAGGAACTCTCGGTACTCTTACTAATATAAGCGACACATCAGAAAGCAAAGCCCTCCG。
Claims (2)
1.玉米ZmAGA1基因用于提高玉米抗旱性的应用,所述玉米ZmAGA1基因序列如SEQ IDNO:1所示,或者,所述玉米ZmAGA1基因编码SEQ ID NO:2所示蛋白序列;所述玉米ZmAGA1基因在玉米中高表达提高玉米抗旱性;通过在玉米ZmAGA1基因翻译起始位点上游-1078bp处插入Mutator 1转座子实现玉米ZmAGA1基因在玉米中的高表达;所述Mutator 1转座子插入序列如SEQ ID NO:3所示。
2.一种抗旱玉米品系的育种方法,其特征在于,方法包括:将玉米中的ZmAGA1基因进行激活提高其表达水平获得抗旱玉米品系;通过在玉米ZmAGA1基因翻译起始位点上游-1078bp处插入Mutator 1转座子实现玉米ZmAGA1基因在玉米中的激活;所述Mutator 1转座子插入序列如SEQ ID NO:3所示。
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