| 1 | Nucleolar histone deacetylases HDT1,HDT2,and HDT3 regulate plant reproductive development显示文摘Nucleolus is a membrane-less organelle where ribosomes are assembled, and ribosomal RNAs(r RNAs)transcribed and processed. The assembled ribosomes composed of ribosomal proteins and r RNAs synthesize proteins for cell survival. In plants, the loss of nucleolar ribosomal proteins often causes gametophytically or embryonically lethality. The amount of r RNAs are under stringent regulation according to demand and partially switched off by epigenetic modifications. However, the molecular mechanism for the selective activation or silencing is still unclear, and the transcriptional coordination of r RNAs and ribosomal proteins is also unknown. Here, we report the critical role of three Arabidopsis nucleolar proteins HDT1,HDT2, and HDT3 in fertility and transcription of r DNAs and r RNA processing-related genes through histone acetylation. This study highlights the important roles of transcriptional repression of ribosome biogenesisrelated genes for plant reproductive development. | Yu Luo Dong-Qiao Shi Peng-Fei Jia Yuan Bao Hong-Ju Li Wei-Cai Yang | 2022 | Journal of Genetics and Genomics2022，49，1： | 1 |
| 2 | 金钱鱼下丘脑转录组分析及其对雌激素在体注射的响应显示文摘为探究XX雌性和XY雄性金钱鱼(Scatophagus argus)下丘脑中的差异表达基因及雌激素(17β-Estradiol,E2)在体注射对XY雄鱼下丘脑中基因表达的影响,开展了转录组测序分析,包括测序数据质控、基因功能注释,差异基因筛选、鉴定和差异基因功能富集分析等,并利用实时定量PCR(Real-time quantitative PCR,qPCR)检测了金钱鱼下丘脑中相关基因的表达。金钱鱼下丘脑转录组共测得Clean reads 275833710,测序质量30(Q30)大于95%,GC含量值大于48%。其中,Ctrl-XX-H vs.Ctrl-XY-H组,共筛选和鉴定了91个差异表达基因,包括36个上调基因和55个下调基因。在Ctrl-XY-H vs.E2-XY-H组,筛选和鉴定了28个差异表达基因,包括11个上调基因和17个下调基因。GO和KEGG富集分析发现,差异表达基因主要显著富集在细胞、单生物过程,膜、膜组分,结合等生物学功能及泛醌和其他萜类-醌生物合成及类固醇激素生物合成通路等。转录组和qPCR结果表明,XX和XY金钱鱼下丘脑中prl、ccna1和hsp90aa1.1等生殖相关基因的表达具有明显的性别差异,但sbGnRH、sGnRH和cGnRH等生殖轴相关基因,ghrh、ghrhr和sst1、3、5和6等生长轴相关基因的表达没有明显差异。E2在体注射后,雄鱼下丘脑中cyp19a1b和greb1等基因的表达显著上调,而prl的表达显著下调。以上结果表明,雌激素可通过反馈作用调节下丘脑中部分基因的表达,参与调控金钱鱼性腺发育和配子发生过程。 | 潘书慧 周彤 袁嘉慧 罗琼 秦若彤 茹笑影 黄洋 石红娟 李广丽 | 2023 | 水生生物学报2023，47，8： | 0 |
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