中国农学通报2025，Vol.41Issue(16)：40-44,5.
外源独脚金内酯对波斯菊种子萌发的影响
Effect of Exogenous Strigolactones on Seed Germination of Cosmos bipinnatus
摘要
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.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Key words
Cosmos bipinnatus/strigolactones/germination/physiological characteristics/enzymatic activity/phytohormones/plant growth regulator分类
农业科技引用本文复制引用
关玉熙,温超..外源独脚金内酯对波斯菊种子萌发的影响[J].中国农学通报,2025,41(16):40-44,5.基金项目
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) （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). （32102426）
