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SOC1（SUPPRESSOR OF OVEREXPRESSION OF CO1）/AGL20（AGAMOUS-LIKE 20）是MADS-box家族一员,在植物开花过程中起着重要的调控作用,它能够整合来自光周期途径、春化途径、自主开花途径和赤霉素途径中的信号,并与其他基因相互作用共同调节植物的开花时间以及花的类型和花分生组织。目前已经证明SOC1基因的过表达可以促进植物提前开花,而soc1突变体则会表现出晚花的表型。相关研究也显示,SOC1在植物开花之外的其他生命活动中也起着重要作用。本研究主要对SOC1及其同源基因在植物开花和其他生理活动中的功能以及SOC1基因的表达调节等研究进展进行综述,通过对30种植物的SOC1同源基因序列进行聚类分析,发现SOC1基因的同源性基本反映了物种间的亲缘关系,最后对该基因的研究前景提出展望,为以后SOC1及其同源基因的相关研究提供一定的参考。图3表1参42 相似文献
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SOC1（SUPPRESSOR OF 0VEREXPRESSION OF CO1）／AGL20（AGAMOUS—LIKE20）是MADS-box家族一员,在植物开花过程中起着重要的调控作用,它能够整合来自光周期途径、春化途径、自主开花途径和赤霉素途径中的信号,并与其他基因相互作用共同调节植物的开花时间以及花的类型和花分生组织。目前已经证明SOC1基因的过表达可以促进植物提前开花,而SOC1突变体则会表现出晚花的表型。相关研究也显示,SOC1在植物开花之外的其他生命活动中也起着重要作用。本研究主要对SOC1及其同源基因在植物开花和其他生理活动中的功能以及SOC1基因的表达调节等研究进展进行综述,通过对30种植物的SOC1同源基因序列进行聚类分析,发现SOC1基因的同源性基本反映了物种间的亲缘关系,最后对该基因的研究前景提出展望,为以后SOC1及其同源基因的相关研究提供一定的参考。 相似文献
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木本果树开花相关基因的研究进展 总被引：1，自引：0，他引：1
开花是植物从营养生长向生殖生长的转变过程。拟南芥中存在多条调控开花时间的信号途径如光周期途径、春化途径、赤霉素途径和自动途径等。与草本植物相比,木本植物成花调控研究进展较缓慢。本文综述了木本果树中开花综合基因,即综合不同成花调控途径信号的关键基因,如CO、FLC、SVP、FT、LFY、TFL、AP1、SOC1等的研究进展,以期为进一步探索木本植物成花的分子调控机制提供参考。 相似文献
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CO/FT调节元件与植物开花时间调节研究进展 总被引：1，自引：0，他引：1
综述了CO/FT调节元件与植物开花时间调节的最新研究进展。开花是植物由营养生长向生殖生长转变的关键过程。光周期和温度在植物开花时间控制中起主要作用。在拟南芥和水稻中,CONSTANS（CO）对植物的日照长度测定至关重要,它与其靶基因FLOWERING LOCUS T（FT）构成的调节元件（regulon）在依赖于光周期的开花过程中起重要作用。目前已从多种植物中鉴定出CO和FT基因,并对其在开花时间的调控作用进行了深入研究。 相似文献
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为了促进杨树早期开花,缩短杨树遗传育种周期,采用农杆菌AGL1介导的转化方法及热激诱导方法,进行了热激启动子HSP控制下的3类FT基因转化2种杨树无性系(353与717)诱导杨树早期开花的比较研究.结果表明:来自拟南芥的FT基因促花效果优于来自杨树的FT1和FT2基因;FT类基因与受体基因型/性别之间互作明显,开花较好... 相似文献
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FD, a bZIP protein mediating signals from the floral pathway integrator FT at the shoot apex 总被引：5，自引：0，他引：5
Abe M Kobayashi Y Yamamoto S Daimon Y Yamaguchi A Ikeda Y Ichinoki H Notaguchi M Goto K Araki T 《Science (New York, N.Y.)》2005,309(5737):1052-1056
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为揭示白桦(Betula platyphylla×B.pendula)中Bp AP1转录因子的调控机理,以Bp AP1过表达、抑制表达转基因白桦以及非转基因对照白桦(NT)为试材,对前期获得的Bp AP1转基因白桦中的6条开花相关基因(BpPI、Bp MADS4、Bp MADS5、FT、TFL1和LFY)进行了定量PCR分析,探讨了白桦Bp AP1转录因子与这6条开花基因的表达调控关系以及它们对白桦提早开花的影响。结果表明:非转基因对照与Bp AP1抑制表达转基因白桦叶片中Bp AP1、Bp PI、Bp MADS4、Bp MADS5、FT、TFL1和LFY的相对表达量在不同发育时期变化均不显著。Bp AP1过表达转基因白桦叶片和雄花序中这7条基因的表达量在不同发育时期均显著高于NT和Bp AP1抑制表达转基因白桦。在Bp AP1过表达转基因白桦中,除Bp AP1和TFL1外,其他5条基因在各个时期的雄花序中表达量均为最高,多数基因的表达高峰出现在6月15日;另外,Bp AP1、Bp MADS4、Bp MADS5和Bp PI在8月15日的雄花序中表达量也很高;TFL1的相对表达量在9月1日的叶片中显著上调;LFY基因在生长发育最旺盛的6、7月份的雄花序中达到了表达高峰。Bp AP1与Bp PI、Bp MADS4、Bp MADS5、FT、TFL1、LFY这6条开花相关基因之间均呈极显著的正相关。 相似文献
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Activation tagging of the floral inducer FT 总被引：5，自引：0，他引：5
Kardailsky I Shukla VK Ahn JH Dagenais N Christensen SK Nguyen JT Chory J Harrison MJ Weigel D 《Science (New York, N.Y.)》1999,286(5446):1962-1965
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KU Li-xia LI Si-yuan CHEN Xiao WU Lian-cheng WANG Xin-tao CHEN Yan-hui 《中国农业科学(英文版)》2011,10(1):18-27
The photoperiod response of fowering is critical to the survival and successful reproduction in crops.The Hd6 gene,encoding a protein similar to the Arabidopsis α-subunit of CASEIN KINASE2α(CK2α)has been reported to affect flowering time through the photoperiodic pathway in rice.In this study,the maize ortholog,ZmHd6,has been cloned and its role in the photoperiodic pathway was investigated.ZmHd6 encodes 332 amino acids with six distinct domains: two CK2 active domains,a nuclear localization signal sequence,a N terminal domain,an ATP binding site,and an active site of serine/threonine protein kinase.ZmHd6 was constitutively expressed in the leaves and shoot apical meristem(SAM)with the highest expression in SAMs of plants with seven leaves under long and short day conditions.Delayed flowering time under long day(LD)conditions were observed in ZmHd6 overexpression transgenic Arabidopsis plants compared to the wild type.In transgenic Arabidopsis plants,ZmHd6 was expressed in a circadian oscillatory pattern,TOC1 peak expression was delayed,new G1,CO,and FT expressions reached to peak after 3 h while entering illumination period and oscillatory expression patterns of CO and FT were created during the dark phase.These results suggested that ZmHd6 might negatively regulate flowering time under LD conditions by delaying TOC1 peak expression and disrupting CO and FT expression in transgenic Arabidopsis plants. 相似文献
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Plants commonly use photoperiod (day length) to control the timing of flowering during the year, and variation in photoperiod response has been selected in many crops to provide adaptation to different environments and farming practices. Positional cloning identified Ppd-H1, the major determinant of barley photoperiod response, as a pseudo-response regulator, a class of genes involved in circadian clock function. Reduced photoperiod responsiveness of the ppd-H1 mutant, which is highly advantageous in spring-sown varieties, is explained by altered circadian expression of the photoperiod pathway gene CONSTANS and reduced expression of its downstream target, FT, a key regulator of flowering. 相似文献
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Arabidopsis VRN genes mediate vernalization, the process by which a long period of cold induces a mitotically stable state that leads to accelerated flowering during later development. VRN1 encodes a protein that binds DNA in vitro in a non-sequence-specific manner and functions in stable repression of the major target of the vernalization pathway, the floral repressor FLC. Overexpression of VRN1 reveals a vernalization-independent function for VRN1, mediated predominantly through the floral pathway integrator FT, and demonstrates that VRN1 requires vernalization-specific factors to target FLC. 相似文献
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光周期途径成花关键基因CONSTANS的进化机制 总被引：1，自引：1，他引：0
CONSTANS（CO）是植物响应光周期调节的重要基因和监测日照长度的重要元件,可将光信号和生物钟信号转变为开花信号,激活下游基因（FT）的表达,从而诱导植物开花。选取14个已被测序的物种,采用生物信息学手段,从外显子-内含子结构、基因重复、基因差异表达等方面开展CO基因家族研究。结果表明:14个物种共鉴定到159个CO家族成员,CO基因常以多拷贝的形式存在,多数含2~4个外显子,在进化过程中表现出多样性。CO家族重复基因的扩张与基因组重复相关。CO在水稻Oryza sativa根、旗叶、花和种子中均有表达,花芽到花的转变过程中OsCO3的表达量上升,而OsCO7下降,说明水稻CO家族成员之间存在功能差异。 相似文献
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Day length controls flowering time in many plants. The day-length signal is perceived in the leaf, but how this signal is transduced to the shoot apex, where floral initiation occurs, is not known. In Arabidopsis, the day-length response depends on the induction of the FLOWERING LOCUS T (FT) gene. We show here that local induction of FT in a single Arabidopsis leaf is sufficient to trigger flowering. The FT messenger RNA is transported to the shoot apex, where downstream genes are activated. These data suggest that the FT mRNA is an important component of the elusive "florigen" signal that moves from leaf to shoot apex. 相似文献
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Integration of spatial and temporal information during floral induction in Arabidopsis 总被引：5，自引：0，他引：5
Wigge PA Kim MC Jaeger KE Busch W Schmid M Lohmann JU Weigel D 《Science (New York, N.Y.)》2005,309(5737):1056-1059
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【目的】 探讨CfFT基因在蕙兰成花中的作用。【方法】采用RT-PCR结合RACE技术从蕙兰(Cymbidium faberi)中克隆Flowering locus T（FT）同源基因CfFT。采用实时定量RT-PCR对不同组织及不同花发育时期CfFT进行表达分析。将该基因克隆到PBI121载体上导入烟草中,并对不同转基因烟草株系中的CfFT、NFL、NtFUL和NAP1基因进行实时定量RT-PCR分析。【结果】对蕙兰花芽分化不同时期的CfFT的表达分析表明,CfFT在花芽分化初期的表达量最高,之后随着花芽的成熟表达量逐渐降低。将CfFT导入烟草进行异源表达,转基因株系表现出明显的早花表型。对开花时间不一的转基因株系中的CfFT表达分析表明,其表达量与转基因烟草开花时间早晚成正比。进一步对这些株系内源的NFL、NAP1和NtFUL表达分析表明,NFL、NAP1和NtFUL基因的表达量与CfFT表达成正比,说明NFL、NAP1和NtFUL的表达受FT基因的上游调控。【结论】在烟草中异源表达蕙兰中的CfFT基因能促进烟草提前开花。 相似文献
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《农业科学学报》2017,(12)
There are 41 members of the CCT(CO, CO-like, and TOC1) domain-containing gene family in rice, which are divided into three subfamilies: COL(CONSTANS-like), CMF(CCT motif family), and PRR(pseudoresponse regulator). The first flowering gene to be isolated by map-based cloning, Heading date 1(Hd1), which is the orthologue of CO in rice, belongs to COL. The central regulator of plant development, Ghd7, belongs to CMF. The major role in controlling rice distribution to high latitudes, Ghd7.1/PRR37, belongs to PRR. Both of Hd1, Ghd7 and Ghd7.1 simultaneously control grain number, plant height, and the heading date. To date, 13 CCT family genes from these three subfamilies have been shown to regulate flowering. Some of them have pleiotropic effects on grain yield, plant height, and abiotic stresses, and others function as circadian oscillators. There are two independent photoperiod flowering pathways that are mediated by GI-Hd1-Hd3 a/RFT and GI-Ehd1-Hd3 a/RFT in rice. CCT family genes are involved in both pathways. The latest study reveals that protein interaction between Hd1 and Ghd7 integrates the two pathways. CCT family genes are rich in natural variation because rice cultivars have been subjected to natural and artificial selection for different day lengths in the process of domestication and improvement. Alleles of several crucial CCT family genes such as Hd1, Ghd7, and Ghd7.1 exhibit geographic distribution patterns and are highly associated with yield potentials. In addition, CCT family genes are probably involved in the responses to abiotic stress, which should be emphasized in future work. In general, CCT family genes play important roles in regulating flowering, plant growth, and grain yield. The functional identification and elucidation of the molecular mechanisms of CCT family genes would help construct a flowering regulatory network and maximize their contribution to rice production. 相似文献
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为了研究CaMV35S启动子驱动的FT基因对转基因杨树Populus早期开花的影响,利用Gateway技术构建了35S::FT基因表达载体,并对杨树进行了遗传转化,从转基因杨树花的发育、花器官变异等方面初步探讨了35S::FT促进杨树早期开花性能。结果表明:35S::FT转基因杨树分生组织属性的改变及初始花结构的形成发生于试管培养阶段;花开始发育后如不及时把开花植株继代培养或转至土壤温室培养,初始花结构会凋谢枯萎,不能继续发育。转基因植株花器官的分化与发育发生于温室培养阶段的3~5周内,能够分化出典型的花器官,但发育不完全,具雌雄蕊、花盘结构,无成熟苞片结构,雄蕊不能成熟发育。35S::FT诱导的花均为单朵花,而非野生型的柔荑花序;多数花属于单性花,但转基因雄性无性系中会出现两性花。转基因植株的开花率随着试管苗继代次数的增加而急剧下降,但两性花比例会上升。 相似文献
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LFY(LEAFY)及其同源基因是控制高等植物从营养生长向生殖生长转变的重要基因,对这些基因进行深入研 究具有缩短林木幼龄期和改良花卉花期的实际应用价值。为了深入研究LFY 氨基酸序列变化对其功能的影响,本 研究以lfy2 和lfy5 为材料分析了这2 个突变体表型变异及突变位点的特点。表型观察表明:虽然lfy2 和lfy5 属于 不同的生态型,但是表型变异类似;lfy 突变体花期比野生型推迟14 d,茎生叶和次生枝的数目增多,花器官缺失并 且被同源异型化。序列分析发现:lfy2 的LFY 氨基酸序列中只发生了P236L 位点变异,lfy5 的LFY 氨基酸序列中 发生变异的位点为F42L、V209A 和P236L,其中F42L 和V209A 是非保守位点变异。Q-PCR 结果显示:lfy2 的花序 中TFL1 和FLC 表达上调,FT 和AP2 表达下降,AP1、AP3、AG 几乎没有表达。这些结果表明,由于LFY-C 端结构域 内236 位氨基酸发生突变引起LFY 功能缺失,导致了lfy2 和lfy5 表型变异。 相似文献