Article(id=1236324894636569161, tenantId=1146029695717560320, journalId=1235980609244409860, issueId=1236324890941378645, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1000-2561.2023.12.004, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1687881600000, receivedDateStr=2023-06-28, revisedDate=1689696000000, revisedDateStr=2023-07-19, acceptedDate=null, acceptedDateStr=null, onlineDate=1772692424686, onlineDateStr=2026-03-05, pubDate=1703433600000, pubDateStr=2023-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772692424686, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772692424686, creator=13701087609, updateTime=1772692424686, updator=13701087609, issue=Issue{id=1236324890941378645, tenantId=1146029695717560320, journalId=1235980609244409860, year='2023', volume='44', issue='12', pageStart='2355', pageEnd='2578', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772692423806, creator=13701087609, updateTime=1772693190259, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236328105745380010, tenantId=1146029695717560320, journalId=1235980609244409860, issueId=1236324890941378645, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236328105749574315, tenantId=1146029695717560320, journalId=1235980609244409860, issueId=1236324890941378645, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=2392, endPage=2400, ext={EN=ArticleExt(id=1236324897400615611, articleId=1236324894636569161, tenantId=1146029695717560320, journalId=1235980609244409860, language=EN, title=Cloning and Expression Analysis of MePP2CAb Gene in Cassava, columnId=1236324891675381847, journalTitle=Chinese Journal of Tropical Crops, columnName=Special Focus: Resources and Utilization of Cassava, runingTitle=null, highlight=null, articleAbstract=

Protein phosphatase 2C (PP2C) plays a key role in the ABA signaling pathway. In order to investigate the response process of the PP2C gene to abiotic stress in cassava, MePP2CAb gene was cloned from Arg7 in cassava using the RT-PCR technique. Bioinformatic analysis, autoactivation activity analysis, promoter activity analysis, and expression pattern analysis of the MePP2CAb gene under different stress and hormone treatments were conducted. The results showed that (1) the total length of the MePP2CAb gene was 1296 bp, encoding 431 amino acid residues. The MePP2CAb protein had a relative molecular weight of 47.08 kDa and a theoretical isoelectric point of 5.5. It exhibited structural domain characteristics of the PP2C family. Protein sequence analysis showed that MePP2CAb was most similar to PP2C sequences of Hevea rubber and Jatropha jatropha, with consistencies of 82.75% and 74.01%, respectively, and a conserved C-terminal. These results indicated that MePP2CAb belongs to the PP2C family. (2) The expression of the MePP2CAb gene was found to be higher in cassava storage roots, stems, and leaves, with the highest expression observed in storage roots. (3) MePP2CAb demonstrated self-activation activity, and its full-length promoter exhibited high activity. (4) The MePP2CAb gene belongs to the core ABA pathway, and promoter sequence analysis showed that it contained ABRE (abscisic acid responsiveness) elements, MeJA response elements, and a drought-induced motif. Under different stress and hormone treatments, low temperature and SA treatment significantly repressed the MePP2CAb gene, while mannitol, NaCl, ABA, and MeJA significantly induced its expression. In addition, the interaction between MePP2CAb and MePYL1 was also observed. These results suggest that MePP2CAb may be responsive to abiotic stress in cassava, although its role as a positive or negative regulatory factor remains unclear. These results provide a clue for further investigation into the role of the MePP2CAb gene in the ABA signaling pathway and the improvement of cassava's adaptation to abiotic stress.

, correspAuthors=Jian ZENG, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, 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=Shuting WANG, Jinglin YANG, Man LIN, Lizhen LI, Boting LIU, Chunlai WU, Jian ZENG, Wei HU), CN=ArticleExt(id=1236324898071704299, articleId=1236324894636569161, tenantId=1146029695717560320, journalId=1235980609244409860, language=CN, title=木薯MePP2CAb基因克隆及表达分析, columnId=1236324891813793882, journalTitle=热带作物学报, columnName=专题：木薯资源与利用, runingTitle=null, highlight=null, articleAbstract=

2C型蛋白磷酸酶（protein phosphatase 2C, PP2C）在ABA核心信号途径中发挥着重要作用。为了研究PP2C基因在木薯响应非生物胁迫过程中的功能，本研究通过RT-PCR技术，从木薯Arg7中克隆得到MePP2CAb基因，并对其进行生物信息学分析、自激活活性分析、启动子活性分析及不同逆境和激素处理下的表达模式分析。结果表明：（1）MePP2CAb基因的长度为1296 bp，包含431个氨基酸残基，蛋白相对分子量和理论等电点分别为47.08 kDa和5.5，具有PP2C家族的结构域特征。蛋白质序列比对结果显示，MePP2CAb与橡胶树和麻风树的PP2C序列最为相似，一致性分别为82.75%和74.01%，在C-端保守。上述结果证明MePP2CAb基因属于PP2C家族。（2）MePP2CAb基因在木薯块根中的表达最高。（3）MePP2CAb具有一定的自激活活性，MePP2CAb基因的全长启动子的活性也较高。（4）MePP2CAb基因属于ABA核心通路，启动子序列分析显示，它包含ABRE（abscisic acid responsiveness）元件、MeJA响应原件、干旱诱导元件（drought-induced motif）等元件。不同逆境和激素处理的结果也表明，MePP2CAb基因在冷处理和SA处理下受到抑制，在NaCl、mannitiol、ABA和MeJA处理的过程中受到诱导。另外酵母双杂交结果显示MePP2CAb能够与MePYL1产生互作。根据上述结果推测，MePP2CAb基因可能对木薯的非生物胁迫有响应，但其到底是正调控因子还是负调控因子尚不清楚。该结果为进一步研究解析MePP2CAb基因在ABA信号通路中的作用及提高木薯在非生物胁迫中的适应能力提供参考。

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王舒婷（2002—），女，本科生，研究方向：植物基因功能。

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王舒婷（2002—），女，本科生，研究方向：植物基因功能。

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