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| 1 | Pentatricopeptide repeat protein PHOTOSYSTEM I BIOGENESIS FACTOR2 is required for splicing of ycf3显示文摘To gain a better understanding of the molec-ular mechanisms of photosystem!(PSI)biogenesis,wecharacterized the Arabidopsis thaliana photosystem l bio-genesis factor 2(pbf2)mutant,which lacks PSl complex.PBF2 encodes a P-class pentatricopeptide repeat(PPR)protein.In the pbf2 mutants,we observed a striking de-crease in the transcript level of only one gene,thechloroplast gene ycf3,which is essential for PSl assembly.Further analysis of ycf3 transcripts showed that PBF2 isspecifically required for the splicing of ycf3 intron 1.Computational prediction of binding sequences and elec-trophoretic mobility shift assays reveal that PBF2 specifi-cally binds to a sequence in ycf3 intron 1.Moreover,we found that PBF2 interacted with two general factors forgroup ll intron splicing CHLOROPLAST RNA SPLICING2-AsSOCIATED FACTOR1(CAF1)and CAF2,and facilitated theassociation of these two factors with ycf3 intron 1.Ourresults suggest that PBF2 is specifically required for thesplicing of ycf3 intron 1 through cooperating with CAF1and CAF2.Our results also suggest that additional proteinsare required to contribute to the specificity of CAF-dependent group ll intron splicing. | Xuemei Wang Zhipan Yang Yi Zhang Wen Zhou Aihong Zhang Congming Lu | 2020 | Journal of Integrative Plant Biology2020，62，11： | 2 |
| 2 | 参与辣椒素合成的DnaJ基因家族全表达谱分析显示文摘背景:DnaJ蛋白在植物发育和胁迫反应中发挥重要作用。近年来,通过对辣椒基因组全面的生信分析鉴定到76个DnaJ基因。但目前尚无辣椒DnaJ基因系统发育关系和表达谱的研究报道。因此,我们对不同组织、非生物胁迫和激素响应下辣椒DnaJ基因的系统发育关系和表达谱进行了系统的分析。结果:系统发育分析显示,辣椒DnaJ基因按序列同源性可分为7个亚族(Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ和Ⅶ亚族)。辣椒DnaJ基因在不同组织中的表达显示,38%(29/76)的辣椒DnaJ基因在至少一个组织中表达。结果表明,DnaJ基因在辣椒生长发育中具有潜在的关键作用。另外,为了解辛辣和非辛辣辣椒DnaJ基因在胎座中的表达差异,我们还利用RNA-Seq数据和qRT-PCR分析了辣椒DnaJ基因的表达模式。通过比较分析发现,8个基因在辛辣辣椒和非辛辣辣椒中的表达差异显著。CaDnaJs与胎座发育过程中参与辣椒素合成的基因共同表达。更重要的是,我们的研究揭示了这8个DnaJ基因可能受到胁迫(热、干旱和盐)的调控,同时也受到植物激素的调控(ABA,GA3,MeJA和SA)。结论:综上所述,部分在胎座中表达的DnaJ基因可能参与了植物在与刺激性相关化合物生物合成过程中对非生物胁迫的响应。本研究为辣椒DanJ基因的表达谱提供了广泛的认识,有助于我们对辣椒中的DnaJ基因功能认识。 | Fang Fanfei Liu Fawan Yang Xian Wan Hongjian Kang Yunyan 刘周斌(译) | 2020 | 辣椒杂志2020，，3： | 2 |
| 3 | Association mapping for root system architecture traits under two nitrogen conditions in germplasm enhancement of maize doubled haploid lines显示文摘Root system architecture(RSA)contributes to nitrogen(N)uptake and utilization in maize.In this study,a germplasm enhancement of maize double haploid population of 226 lines genotyped with 61,634 SNPs was used to investigate the genetic basis of RSA under two N levels using a genome-wide association study(GWAS).GLM+PCA,FarmCPU,and MLM models were utilized to balance false positives and false negatives.In total,33 and 51 significant SNP-trait associations were detected under high and low N conditions,respectively.Under high N,SNP S9_2483543 was detected by all models.Linkage disequilibrium(LD)regions of some SNPs overlapped with the intervals of QTL for RSA and N response that were detected in previous studies.In particular,several known genes,Rtcs,Rtcl,Rtcl,and Ms44,were located in the LD regions of S1_9992325,S9_151726472,S9_154381179,and S4_197073985,respectively.Among the candidate genes identified by this study,GRMZM2G139811,GRMZM2G314898,GRMZM2G054050,GRMZM2G173682,GRMZM2G470914,GRMZM2G462325,GRMZM2G416184,and GRMZM2G064302 were involved in seedling,seed,and root system development or N metabolism in Arabidopsis or rice.The markers identified in this study can be used for marker-assisted selection of RSA traits to improve nitrogen use efficiency in maize breeding,and the candidate genes will contribute to further understanding of the genetic basis of RSA under diverse N conditions. | Langlang Ma Chunyan Qing Ursula Frei Yaou Shen Thomas Lübberstedt | 2020 | The Crop Journal2020，8，2： | 1 |
| 4 | Role of Ppt1 in multiple stress responses in Candida albicans显示文摘To study the function of CaPpt1,we deleted PPT1 gene from the Candida albicans genome by sequentially replacing the entire coding region with the selectable markers ARG4 and HIS1.The results showed that the deletion of Ppt1 did not affect the hyphal formation of C.albicans under serum induction and caused enhanced sensitivity to DNA damage,Calcofluor white and saltinduced stress.We also found that Ppt1 was not required for the phenotypic response of cells treated with the genotoxins,methylmethane sulfonate and hydroxyurea.Flow cytometric analyses indicated that ppt1D cells and wild-type cells showed similar G2/M arrest profiles when exposed to DNA damage stress.Ppt1 was not required for the activation of the DNA damage response pathway,as indicated by normal phosphorylation of Rad53 and Rfa2 in ppt1D cells under DNA damage stress.We suggest that Ppt1 plays important roles in response to various stress conditions in C.albicans. | Kangdi Hu Wanjie Li Jiaxin Gao Qizheng Liu Haitao Wang Yue Wang Jianli Sang | 2014 | Chinese Science Bulletin2014，59，31： | 1 |
| 5 | 玉米小G蛋白ZmRab7基因克隆及其盐胁迫响应分析显示文摘为探讨小G蛋白在玉米盐胁迫响应中的作用,克隆玉米ZmRab7基因并对其生理功能进行初步分析。生物信息学分析表明,ZmRab7基因编码206个氨基酸,包含保守的G1-G5基序和C末端Cys位点;系统进化分析显示,玉米ZmRab7蛋白与同为单子叶植物的高粱SbRab7亲缘关系最近;ZmRab7蛋白在二级结构和三级结构上由4个α-螺旋和多个β-折叠、无规卷曲组成功能域,且与双子叶植物拟南芥AtRab7空间结构高度相似。进一步研究发现,ZmRab7主要在玉米的根及幼胚中表达;该基因启动子区含有4个GT1GMSCAM4和2个DRECRTCOREAT盐胁迫响应元件,高盐能够轻微抑制其表达;酵母生长试验证实,ZmRab7-pYES2转基因酵母表现出盐胁迫不耐受表型。这些结果说明,玉米ZmRab7基因编码1个响应盐胁迫的Rab类小G蛋白,为进一步详细阐明玉米中Rab类蛋白的生理功能奠定了基础。 | 牛艳丽 贾明珠 韩栓 付佳苗 刘凌云 | 2020 | 华北农学报2020，35，3： | 0 |
| 6 | 拟南芥swn突变体耐盐性的初步分析显示文摘SWN (Swinger)蛋白是多梳抑制复合体2 (polycomb repressive complex2, PRC2)结构的核心成分之一,为了研究SWN在拟南芥中耐盐胁迫方面的作用,我们分析了拟南芥突变体swn与野生型之间转录组水平的基因表达差异,高盐胁迫下的萌发实验,以及与盐胁迫响应基因RD20 (Responsive to desiccation 20)、SOS1 (Salt overly sensitive)和MAPK6 (Mitogen-activated protein kinase)的表达。结果显示,GO富集分析表达上调的基因,共富集到20个GO通路,其中响应盐胁迫通路(Respond to salt stress)富集程度较高;在高盐胁迫下,swn表现出比野生型更高的萌发率,幼苗生长情况也优于野生型;盐胁迫响应基因RD20、SOS1和MAPK6表达量也更高。本研究表明,swn突变体对盐的耐受性强于野生型,SWN基因在拟南芥抗盐过程中发挥负调控作用。 | 向兰舟 胡娅晴 谢涵 刘春林 阮颖 | 2021 | 分子植物育种2021，19，8： | 0 |
| 7 | From Chinese Science Bulletin to Science Bulletin: celebrate the coming 50th birthday显示文摘As the only multidisciplinary journal supervised by Chinese Academy of Sciences and the National Natural Science Foundation of China,Science Bulletin will usher in its50th anniversary in 2016.A fifty-year history for a journal is always remarkable.However,the more important reason to celebrate besides the great age is:the fifty-year old journal continues to be vigorous and influential. | Xuming Jia Rui An Xiao-Ya Chen | 2015 | Science Bulletin2015，60，24： | 0 |
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