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多效唑和乙烯利对西克刺桐花芽分化及成花基因表达的影响

刘贝宁 陈发兴

刘贝宁,陈发兴. 多效唑和乙烯利对西克刺桐花芽分化及成花基因表达的影响 [J]. 福建农业学报,2024,39(4):427−437 doi: 10.19303/j.issn.1008-0384.2024.04.007
引用本文: 刘贝宁,陈发兴. 多效唑和乙烯利对西克刺桐花芽分化及成花基因表达的影响 [J]. 福建农业学报,2024,39(4):427−437 doi: 10.19303/j.issn.1008-0384.2024.04.007
LIU B N, CHEN F X. Effects of Paclobutrazol and Ethephon on the Differentiation of Flower Buds and Expression of Flowering Genes in Erythrina sykesii [J]. Fujian Journal of Agricultural Sciences,2024,39(4):427−437 doi: 10.19303/j.issn.1008-0384.2024.04.007
Citation: LIU B N, CHEN F X. Effects of Paclobutrazol and Ethephon on the Differentiation of Flower Buds and Expression of Flowering Genes in Erythrina sykesii [J]. Fujian Journal of Agricultural Sciences,2024,39(4):427−437 doi: 10.19303/j.issn.1008-0384.2024.04.007

多效唑和乙烯利对西克刺桐花芽分化及成花基因表达的影响

doi: 10.19303/j.issn.1008-0384.2024.04.007
基金项目: 福建省科技计划项目(2022N5016)
详细信息
    作者简介:

    刘贝宁(2003 —),女,主要从事园林植物研究,E-mail:2075431492@qq.com

    通讯作者:

    陈发兴(1967 —),男,博士,教授,主要从事园艺植物领域研究,E-mail:fxchen@fafu.edu.cn

  • 中图分类号: S685

Effects of Paclobutrazol and Ethephon on the Differentiation of Flower Buds and Expression of Flowering Genes in Erythrina sykesii

  • 摘要:   目的  探讨多效唑(paclobutrazol, PAC)和乙烯利(ethephon, ETH)对西克刺桐(Erythrina sykesii)碳氮代谢、内源激素及成花相关基因表达的影响,为刺桐属植物花期调控提供理论依据。  方法  以8 年生的西克刺桐为材料,在花芽生理分化期进行多效唑(PAC)600 mg·L−1、乙烯利(ETH)50 mg·L−1以及二者共同喷施处理,以清水为对照(CK),每个处理均喷施3次。检测顶芽不同花芽生理分化期的碳氮代谢物质含量、内源激素水平和成花相关基因表达量,并调查统计盛花期西克刺桐花序大小、数量和枝条成花率。  结果  西克刺桐叶面喷施多效唑和乙烯利后,随着花芽生理分化进程推进,顶芽的可溶性糖和全碳含量逐渐上升,而可溶性蛋白和全氮含量逐渐下降,导致碳氮比(C/N)升高;其中,PAC+ETH处理与PAC和ETH处理均存在显著差异,在生理分化末期PAC+ETH处理的C/N比值达到最大值。顶芽的内源激素含量也随着生理分化进程而变化,玉米素核苷(zeatin riboside, ZR)和脱落酸(abscisic acid, ABA)含量逐渐上升,而赤霉素(gibberellic acid, GA3)和吲哚乙酸(indole-3-acetic acid, IAA)含量逐渐下降;引起ABA/IAA、ABA/GA3、ZR/IAA、ZR/GA3比值逐渐升高;PAC+ETH处理的激素比值与PAC和ETH处理间均存在显著差异,在生理分化末期PAC+ETH处理的ABA/IAA、ABA/GA3、ZR/IAA、ZR/GA3比值均达到最大值,分别比对照提高317.49%、185.34%、310.58%、180.62%。成花促进基因FT在生理分化中期开始表达且表达量逐渐上调,SOC1AP1SVPLFY基因在生理分化末期才明显表达;成花抑制基因TFL1在生理分化前期就开始表达且表达量逐渐下调。多效唑和乙烯利处理均能促进西克刺桐花芽分化进程和成花诱导,其中600 mg·L−1 PAC+50 mg·L−1 ETH处理的植株开花期提前12 d,枝条成花率达36.46%,植株总花期达55 d。  结论  西克刺桐花芽生理分化期喷施多效唑和乙烯利有利于提高碳氮代谢物质含量,调节内源激素水平和成花相关基因表达,有效促进西克刺桐花芽分化。
  • 图  1  多效唑和乙烯利对西克刺桐碳氮代谢的影响

    图中不同小写字母表示处理间存在显著性差异 (P<0.05)。下同。

    Figure  1.  Effects of paclobutrazol and ethephon on carbon and nitrogen substances in E. sykesii

    Different lowercase letters indicate significant difference at 0.05 level among treatments. Same for below.

    图  2  多效唑和乙烯利对西克刺桐内源激素含量的影响

    Figure  2.  Effects of paclobutrazol and ethephon on endogenous hormone content in E. sykesii

    图  3  多效唑和乙烯利对西克刺桐内源激素平衡的影响

    Figure  3.  Effects of paclobutrazol and ethephon on the ratio of endogenous hormones in E. sykesii

    图  4  多效唑和乙烯利对西克刺桐成花相关基因表达的影响

    Figure  4.  Effects of paclobutrazol and ethephon on the expression of flowering genes in E. sykesii

    表  1  表1 西克刺桐成花相关基因定量PCR引物序列

    Table  1.   Primers designed for flower related genes in E. sykesii

    基因
    Gene
    前引物/后引物
    Forward/
    Reverse primers
    序列(5'-3')
    Sequence(5'-3')
    TIP41TIP41-FGGGTTGGATGGAAGAAGAAGCAC
    TIP41-RCACTTGCTGTGACGGTTTACTTC
    TFL1TFL1-FGGCAGAGGAGAGGACAGGTA
    TFL1-RAAGAGAGTGTCAGTCAGCGG
    LFYLFY-FAGAGGGAGCATCCGTTTATCGT
    LFY-RCGTACCTGAATACTTGGTTCGTCAC
    AP1AP1-FTGAACATGGGTGGCAATTAC
    AP1-RTGTCAAATGCCATACCAAAG
    SVPSVP-FGATTGAGCAAGGAAGTTGCC
    SVP-RTCTTCTCTCCCTTCTTTTCTATTAT
    FTFT-FAGTCCTAGCAACCCTCACCTCC
    FT-RGTCTTCTTCCTCCGCAGCCACT
    SOC1SOC1-FTTGTGATGCTGAAGTTGCTCTCAT
    SOC1-RACTCCTGTTATGCCTGCGGTAG
    下载: 导出CSV

    表  2  多效唑和乙烯对西克刺桐成花的影响

    Table  2.   Effects of paclobutrazol on the flowering of E. sykesii

    处理
    Treatment
    花序长
    Inflorescence
    length/cm
    花序宽
    Inflorescence
    width/cm
    花序小花数
    Small flowers
    number
    枝条成花率
    Flower formation
    rate/%
    始花日期
    Early flowering
    date

    较对照提前天数
    Earlier than
    the control/d
    总花期
    Total
    flowering time/d
    CK 18.3±1.6 a 12.4±1.2 a 66.7±3.9 a 13.02±1.31 c 2023-02-06 0 46
    PAC 15.1±4.5 b 12.5±2.4 a 65.1±5.2 a 21.82±1.74 b 2023-02-01 5 54
    ETH 18.6±1.4 a 12.7±1.6 a 68.8±6.1 a 26.75±2.91 b 2023-01-30 7 52
    PAC+ETH 16.2±0.8 b 12.9±5.8 a 67.3±4.1 a 36.46±4.85 a 2023-01-25 12 55
    同列数据后不同小写字母表示不同处理间差异达到显著水平(P<0.05)。
    Different lowercase letters in the same column indicate significant differences among different treatments at 0.05 level.
    下载: 导出CSV
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  • 收稿日期:  2024-03-05
  • 修回日期:  2024-04-04
  • 网络出版日期:  2024-06-26
  • 刊出日期:  2024-04-28

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