苹果炭疽病抗性miRNA的筛选     

张亚楠  陈新慧  张杰 《中国农学通报》2021,37(7):106-111

为筛选炭疽病菌侵染苹果属植物后相关miRNA的响应情况,以抗病品种‘八棱脆’海棠、感病品种‘嘎啦’苹果2个为试验材料,分别用胶胞炭疽孢子悬浮液侵染组培苗,4天后发病,提取植物总RNA并反转miRNA,用qRT-PCR分析2种植物中抗病相关miRNA相对表达量的差异,并对其靶基因进行预测。在抗性品种中miR390a和miR396b/c/f表达量下调,而在感病品种中表达量上调,且其靶基因均有LRR受体样丝氨酸/苏氨酸蛋白,miR482b靶基因为抗性蛋白。miR390a、miR482b和miR396b/c/f可能在苹果炭疽病的侵染过程中起重要作用。  相似文献   

Identification and function prediction of novel microRNAs in adenosine monophosphate activated protein kinase-activated Sertoli cells of immature boar     

Jiao Jiao Zhang  Yu Sha Wang  Ya Qi Li  Liang Chen  Xian Zhong Wang 《Animal Science Journal》2021,92(1):e13622

This study was carried out with the objective to identify function prediction of novel microRNAs (miRNAs) in immature boar Sertoli cells (SCs) treated with 5-aminoimidazole-4-carboxamide-1-β-D-ribofuranoside (AICAR), which is an agonist of adenosine monophosphate-activated protein kinase (AMPK) for regulating cellular energy homeostasis. Two small RNA libraries (control and AICAR treatment) prepared from immature boar SCs were constructed and sequenced by the Illumina small RNA deep sequencing. We identified 77 novel miRNAs and predicted 177 potential target genes for 26 differential novel miRNAs (four miRNAs up-regulation and 22 miRNAs down-regulation) in AICAR-treated SCs. Gene Ontology enrichment and Kyoto Encyclopedia of Genes and Genomes pathway suggested that target genes of differential novel miRNAs were implicated in many biological processes and metabolic pathways. Our findings provided useful information for the functional regulation of novel miRNAs and target mRNAs on AMPK-activated immature boar SCs.  相似文献   

花椰菜中器官早期发育调控相关的miRNA(Bra-miR07)的克隆及功能研究     

张青丽  金川  秦二军  王玉  武美  李丽红  李慧  陈成彬  宋文芹 《园艺学报》2016,43(1):141-150

在前期通过高通量小RNA测序获得若干在花椰菜器官早期发育过程中呈现差异表达的未知功能miRNA基础上,重点对其中1个在花椰菜下胚轴和子叶中表现为显著差异表达的miRNA(命名为Bra-miR07)进行克隆鉴定及功能分析。研究表明,Bra-miR07前体序列全长为270 bp,可形成稳定的二级发夹结构。Bra-miR07在花椰菜子叶中呈现显著高表达。进一步构建了Bra-miR07的过表达载体并采用浸花法转化拟南芥,获得Bra-miR07过表达的转基因拟南芥株系。表型分析显示,Bra-miR07过表达可显著影响拟南芥植株生长。与野生型相比,过表达Bra-miR07株系表现为生长缓慢,植株矮小,育性降低等发育受阻特征。因此,上述结果预示着Bra-miR07可能也在花椰菜器官发育过程中发挥重要作用。  相似文献   

昆虫纲与线虫纲miRNAs碱基组成特征分析     

朱善良  许琴  许晓风 《安徽农业科学》2008,36(12):5020-5022

[目的]为全面认识miRNA的结构属性和miRNA基因识别策略的设计提供帮助。[方法]利用miRNA数据库,借助于相关的生物信息学软件和数据统计软件,对昆虫纲与线虫纲部分物种(黑腹果蝇、暗果蝇、西方蜜蜂、冈比亚疟蚊、秀丽线杆线虫、线虫种)的已知miRNA序列的碱基组成进行统计分析。[结果]6种生物的miRNA序列中,腺嘌呤(A)含量较为稳定,在碱基组成上AU含量高于GC含量。比较同一物种pre-miRNA与mat-miRNA间相同碱基含量发现,除黑腹果蝇pre-miRNA与mat-miRNA在胞嘧啶(C)的含量上存在显著差异外,其余均未见显著差异。[结论]推测miRNA碱基组成上AU含量高可能与其调控基因表达功能和物种的进化关系有关。  相似文献   

植物源miR156a-5p对五指山断奶仔猪肠道菌群和上皮屏障的影响     

王奕  孙瑞萍  彭永佳  姜涵晨  马飞  张瑾  黎梦 《动物营养学报》2023,(4):2184-2195

本试验旨在探究植物源miR156a-5p对五指山断奶仔猪肠道菌群和上皮屏障的影响。选取初始体重为（5.82±0.13） kg的35日五指山龄断奶仔猪12头，随机分为2组，每组6个重复，每个重复1头。对照组饲喂无意义单链核酸，试验组饲喂合成的植物源miR156a-5p（每天600 pmol/kg）。试验期7 d。结果表明：与对照组相比，1）试验组的终末体重和平均日增重均无显著差异（P>0.05），肺脏指数显著增加（P<0.05）;2）试验组的血清白蛋白和高密度脂蛋白胆固醇含量显著或极显著提高（P<0.05）;3）试验组十二指肠Chao1指数和Observed＿otus指数显著提高（P<0.05），空肠Simpson指数显著降低（P<0.05），盲肠Shanon指数和Simpson指数显著或极显著提高（P<0.05或P<0.01），结肠Simpson指数显著提高（P<0.05）;4）试验组十二指肠拟杆菌目（Bacteroidales）、拟杆菌纲（Bacteroidia）和拟杆菌属（Bacteroides）的富集显著增加（P <0.05）...  相似文献   

不明原因复发性自然流产胚胎绒毛组织MiRNAs的表达研究     

胡建刚  何俊琳  黎刚  刘学庆  丁裕斌  谭彬  王应雄  余秋波 《西南大学学报》2010,32(12)

利用miRCURY LNATM microRNA Arrays 10.0对不明原因复发性自然流产胚胎绒毛和正常胚胎绒毛组织miRNAs进行了检测.结果显示流产绒毛和正常绒毛组织有43个miRNAs存在明显表达差异(ratios≥2.O或ratios≤0.5).其中上调表达33个,下调表达10个.文献检索显示有12个差异表达miRNAs(上调10个,下调2个)已有功能研究报道,主要与细胞侵袭、离子转运和信号转导相关,另外31个尚无功能研究报道.该研究结果提示自然流产绒毛组织中某些差异表达的miRNAs可能与不明原因复发性自然流产的发生有关.  相似文献   

Prediction and Expression Analysis of miRNAs Associated with Heat Stress in Oryza sativa简     

B. SATLAJA  S. R. VOLETT  D. SUBRAHMANYAM  N. SARLA  V. VISHNU PRASANTH  V. P. BHADANA  S. K. MANGRAUTHIA 《水稻科学》2014,21(1):3-12

Computational prediction of potential microRNAs (miRNAs) and their target genes was performed to identify the miRNAs and genes associated with temperature response in rice. The data of temperature-responsive miRNAs of Arabidopsis, and miRNAs and the whole genome data of rice were used to predict potential miRNAs in Oryza sativa involved in temperature response. A total of 55 miRNAs were common in both the species, and 27 miRNAs were predicted at the first time in rice. Target genes were searched for these 27 miRNAs in rice genome following stringent criteria. Real time PCR based on expression analysis of nine miRNAs showed that majority of the miRNAs were down regulated under heat stress for rice cultivar Nagina 22. Furthermore, miR169, miR1884 and miR160 showed differential expression in root and shoot tissues of rice. Identification and expression studies of miRNAs during heat stress will advance the understanding of gene regulation under stress in rice.  相似文献   

低温胁迫响应的甜杨miR475靶基因的预测及表达     

胡惠雯  侯欣瑜  蔡兼  钮俊  项争  安基永  林善枝 《广西农业生物科学》2014,(3):487-494

MicroRNAs（miRNAs）通过使靶mRNA降解或翻译参与生物体的转录后调控,并在植物对生物与非生物胁迫的应答过程中发挥重要作用。本研究基于相关数据库,利用生物信息学方法,通过搜索预测及实验验证得到甜杨（Populus suaveolens）低温响应miR475的12条潜在靶基因,并对其降解位点进行分析;同时,以低温（0℃）处理不同时间甜杨幼苗为试材,利用荧光定量PCR对miR475及其靶基因的表达谱进行检测分析,结果发现,随着低温诱导时间的延长,miR475表达量呈下调趋势,而其靶mRNA的表达量则呈现相反趋势,表明甜杨miR475可能以降解靶mRNA的方式在抵御低温中发挥作用。本文研究结果可为甜杨抗冻机制的后续深入研究提供科学依据。  相似文献   

大麦黄矮病毒侵染小麦miRNA鉴定和特征分析     

沈川  魏彩艳  李静远  吴云锋 《植物病理学报》2021,50(6):675-684

 大麦黄矮病毒(barley yellow dwarf viruses,BYDVs)引起的小麦黄矮病严重威胁我国麦类生产,造成严重经济损失。植物中的miRNA调控植物生长发育、信号转导及对外界压力的反应,通过调控植物抗性基因的表达影响植物与病原物的互作。本研究对感染BYDV-GAV 后3 d、7 d及健康对照的‘小偃6号'小麦样品进行miRNA测序,合并去冗余后分别得到99、96、95个已知的miRNA序列和806、809、1 024个新miRNA序列。对这些miRNA进行差异表达分析,BYDV-GAV侵染后3 d和7 d的小麦样品,与对照相比上调表达的miRNA数量分别为3个和7个,下调表达的为14个和12个。将差异表达的miRNA利用psRNATarget进行靶基因预测,共得到1 254个靶标基因。靶基因的KEGG和GO富集分析,进一步明确了其功能及作用通路。对14个病毒病症状相关的靶基因进行定量分析,结果表明随病毒侵染时间的延长,这些靶基因出现差异性表达,显示miRNA参与了寄主与病毒的互作。研究结果有助于揭示BYDV-GAV与寄主小麦的互作机理。  相似文献   

Construction of miRNA Library and Bioinformatics Analysis About Fetal Fibroblasts of Saanen Dairy Goat     

CHANG Weihua  WANG Juanhong  CUI Zilong 《中国畜牧兽医》2007,47(11):3436-3444

The purpose of this experiment was to enrich miRNA library of goat and explore the role of miRNAs in the regulation of cell growth.The expression of Saanen dairy goat fetal fibroblast miRNAs was analyzed by Illumina high-throughput sequencing and bioinformatics technology.Total miRNAs cDNA library from fibroblasts of Saanen dairy goat was successfully constructed,16 395 039 total reads and 16 150 181 clean reads had been obtained and among them were 205 857 unique sRNAs.From those clean reads,247 novel miRNAs were identified and 8 401 target genes were predicted with 10 832 target sites.Meanwhile,the first base pairs of candidate miRNAs were biased for U and A.GO analysis revealed that more than 69.6% of the genes were related to cells and cellular components,more than 54.1% of the genes were involved in organelle related activity,and approximately 65.0% of the genes were related with cells and cellular processes.KEGG pathway analysis showed that approximately 10.5% of the genes were related to a metabolic pathway,and that it was the pathway that accounts for the most.In conclusion,the data showed that miRNAs played an important regulatory role in fetal fibroblasts.The results provided a basis for further research on the growth regulation of fetal fibroblasts and miRNAs of donor cells in the breast bioreactor of dairy goats.  相似文献