玉米花青素合成相关基因的鉴定及表达分析
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1.重庆市农业科学院;2.长江师范学院现代农业与生物工程学院

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基金项目:

重庆市技术创新与应用发展专项重点项目(CSTB2022TIAD-KPX0008);重庆市科研机构绩效激励引导专项(cstc2022jxjl80028)


Whole-Genome Identification and Comparative Expression Analysis of Anthocyanin Biosynthetic Genes in?maize
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Affiliation:

1.Chongqing Academy of Agricultural Sciences;2.School of Advanced Agriculture and Bioengineering, Yangtze Normal University

Fund Project:

The Chongqing Technical Innovation and Application Development Special Project (CSTB2022TIAD-KPX0008);Performance Incentive and Guidance Project for Chongqing Scientific Research Institutions (cstc2022jxjl80028)

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    摘要:

    紫玉米(Zea mays L.)含有较高的花青素和其他功能性植物化学物质,广泛应用于功能食品和医药等行业,为玉米产业带来了较大的经济效益。为探究紫玉米中花青素生物合成的调控机制,利用生物信息学法,从玉米全基因组数据库中鉴定出分布于10条染色体上的83个花青素生物合成相关基因(ZmABGs);系统发育树将这些基因分为五组。ZmABGs启动子区的顺式作用元件分析表明,ZmABGs基因在参与激素信号通路和胁迫响应中起重要作用。通过对玉米不同组织的表达分析发现,与非授粉组织相比,多个ZmABGs基因在授粉组织中表达,尤其是在玉米种皮中。利用qRT-PCR技术对与粒色相关的15个关键ZmABGs基因在籽粒发育不同时期的表达分析表明,调控基因(ZmPAP1-b和ZmLDB38-a)及其靶结构基因(ZmF3H-b、ZmDFR-b、ZmCHS-b、ZmF3’H、ZmPAL1-b、ZmPAL1-l和Zm4CH-c)的共同上调可能促进了紫玉米Zi 2-1在籽粒发育早期阶段(授粉后10~34 d)的花青素积累,而在后期发育阶段(授粉后34~46 d)这些 ZmABGs 则表现出下调。本研究结果有助于更好地了解玉米中花青素积累的遗传机制和调控网络,同时为促进高花青素玉米品种的选育提供一定的理论基础。

    Abstract:

    Purple corn (Zea mays L.) contained a higher anthocyanins and other functional phytochemicals, and was widely used in function food and pharmaceutical industries, thereby ranked a higher economic benefits for the corn industry. To explore the regulatory mechanism of anthocyanin biosynthesis pathway in purple corn, 83 Zea mays anthocyanin biosynthetic genes (ZmABGs) were identified using bioinformatic approach, classified into 5 groups byphylogenetic tree, which were widely and randomly distributed in 10 chromosomeins. Cis-acting elements analysis of ZmABGs in the promoter region indicated that the potential role of ZmABGs involved in hormone signaling pathways and responsive to different stress.. In addition, more ZmABGs genes were expressed in pollinated organ samples than un- pollinated organ samples, especially for corn pericarp through expression analysis of different tissues. qRT-PCR showed that the upregulation of?regulatory genes (ZmPAP1-b and ZmLDB38-a)?together with its target structure genes (such as ZmF3H-b, ZmDFR-b, ZmCHS-b, ZmF3’H, ZmPAL1-b, ZmPAL1-l and Zm4CH-c) might promote the anthocyanin accumulation in?Zi2-1 at early stages (10–34 days), while the down-regulation of those ZmABGs at late developmental stages (34–46?days). Taken together, our results gain insight into better understanding of the genetic mechanisms and regulatory network of anthocyanin accumulation in?maize, and providing a theoretical basis for promoting the breeding of high anthocyanin maize varieties.

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  • 收稿日期:2024-09-18
  • 最后修改日期:2024-11-07
  • 录用日期:2024-11-13
  • 在线发布日期: 2024-11-13
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