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中国农学通报

中国农学通报 ›› 2025, Vol. 41 ›› Issue (16): 40-44.doi: 10.11924/j.issn.1000-6850.casb2024-0647

• 林学·园艺·园林 • 上一篇    下一篇

外源独脚金内酯对波斯菊种子萌发的影响

关玉熙1,2(), 温超1()   

  1. 1 山东省农业科学院休闲农业研究所/农业农村部华东都市农业重点实验室/生态园艺植物育种山东省工程研究中心，济南 250100
    2 山东农业工程学院农业科技学院，山东淄博 255300
  • 收稿日期:2024-10-30 修回日期:2025-03-22 出版日期:2025-06-05 发布日期:2025-06-05
  • 通讯作者:
    温超，男，1987年出生，山东聊城人，助理研究员，博士，主要从事观赏园艺植物发育与遗传育种研究。通信地址：250100 山东省济南市历城区工业北路23788号，Tel：0531-66657850，E-mail：。
  • 作者简介:

    关玉熙，女，2003年出生，山东淄博人，学士，研究方向为园艺植物栽培研究。通信地址：250100 山东省济南市历城区工业北路23788号，Tel：0531-66657850，E-mail：。

  • 基金资助:
    山东省自然科学基金青年项目“独脚金内酯相关基因DgSMXL8调控菊花侧枝发育的分子机制”(ZR2021QC156); 国家自然科学基金青年科学基金项目“独脚金内酯相关基因DgLBO调控菊花侧枝发育的分子机制”(32102426)

Effect of Exogenous Strigolactones on Seed Germination of Cosmos bipinnatus

GUAN Yuxi1,2(), WEN Chao1()   

  1. 1 Institute of Leisure Agriculture, Shandong Academy of Agricultural Sciences/ Key Laboratory of East China Urban Agriculture, Ministry of Agriculture and Rural Affairs/ Shandong Engineering Research Center of Ecological Horticultural Plant Breeding, Jinan 250100
    2 College of Agricultural Science and Technology, Shandong Agriculture and Engineering University, Zibo, Shandong 255300
  • Received:2024-10-30 Revised:2025-03-22 Published:2025-06-05 Online:2025-06-05

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摘要： 为探究外源独脚金内酯(strigolactones，SLs)对波斯菊种子萌发的影响，对波斯菊种子进行不同浓度(0、0.1、0.5、1、2、5 μmol/L)的rac-GR24(SLs人工合成类似物)处理，测定并分析波斯菊种子的萌发指标、形态指标和生理特性。结果表明，与对照(0 μmol/L)相比，在前3 d中每天各浓度处理之间波斯菊种子的发芽率呈先上升后下降的趋势，均在1 μmol/L rac-GR24时达到最高，而在第4 d和第5 d发芽率差异不显著。随着rac-GR24浓度的升高，各处理组地上部鲜重呈下降趋势；地下部鲜重、地上部干重均呈先下降后上升的趋势；地下部干重各处理组间没有显著差异；地上部和地下部长度均呈降低趋势。在处理第18 h时，1 μmol/L rac-GR24处理显著提高了种子的α-淀粉酶活性、β-淀粉酶活性、可溶性淀粉和可溶性总糖的含量，降低了ABA含量，提高了cZR含量和GA29含量，而对IAA含量没有显著影响。研究表明外源SLs(rac-GR24)能够刺激波斯菊种子萌发，本研究结果可为植物生长调节剂调控波斯菊种子萌发的机制和应用提供理论基础。

关键词: 波斯菊, 独脚金内酯, 发芽, 生理指标, 酶活性, 植物激素, 植物生长调节剂

Abstract:

In order to explore the effects of exogenous strigolactones (rac-GR24) on Cosmos bipinnatus seed germination, the seeds were treated with different concentrations (0, 0.1, 0.5, 1, 2, 5 μmol/L) of rac-GR24, and the effects of treatments on seed germination, morphological indicators and physiological characteristics were determined and analyzed. The results showed that compared with the control (0 μmol/L), the germination rates increased first and decreased afterward with different concentrations of rac-GR24 every day in the first three days, and reached the highest points in 1 μmol/L rac-GR24 treatment, and had no significantly difference on the 4th and 5th day. With the increase of rac-GR24 concentrations, fresh weight of aboveground parts in each treatment showed a decreasing trend, while fresh weight of underground parts and dry weight of aboveground parts both showed a trend of decreasing first and increasing afterward, however, dry weight of underground parts had no significantly difference, the length of aboveground and underground parts both showed a decreasing trend. The activities of α-amylase and β-amylase, contents of soluble starch and total soluble sugar were significantly increased at 18 h under applying exogenous 1 μmol/L rac-GR24 treatment, meanwhile ABA content was decreased, cZR content and GA29 content were increased, however IAA content had no significant change. The results indicated that exogenous SLs (rac-GR24) could stimulate the seeds germination of C. bipinnatus, and provided a theoretical basis for the mechanism and application of plant growth regulators in regulation of seed germination.

Key words: Cosmos bipinnatus, strigolactones, germination, physiological characteristics, enzymatic activity, phytohormones, plant growth regulator