LI Yaliang,ZHANG Yu,TAO Xiao,et al.Effects of Heavy Metal Lead on Seed Germination and Seedling Growth of Three Compositae Plants[J].Northern Horticulture,2024,(4):49-56.[doi:10.11937/bfyy.20232603]
重金属铅对三种菊科植物种子萌发及幼苗生长的影响
- Title:
- Effects of Heavy Metal Lead on Seed Germination and Seedling Growth of Three Compositae Plants
- 文章编号:
- 1001-0009(2024)04-0049-08
- Keywords:
- heavy metal; Pb; Compositae plants; seed germination; seedling growth
- 分类号:
- S 681
- 文献标志码:
- A
- 摘要:
- 以金盏菊（Calendula officinalis）、百日菊（Zinnia elegans）、万寿菊（Tagetes erecta）3种菊科植物种子为试材，采用培养皿萌发水培试验法，研究了不同浓度的Pb溶液（0、50、100、200、400 mg·L-1）对3种菊科植物种子萌发及幼苗生长的影响，测定不同胁迫条件下供试植物种子的发芽势、发芽率、发芽指数、活力指数及幼苗的根长、芽长、鲜质量和干质量，利用隶属函数法对3种植物进行重金属Pb耐受性综合评价，研究菊科植物对重金属Pb胁迫的耐受性，以期探索菊科植物在重金属Pb污染土壤生态修复方面的应用潜能。结果表明：随胁迫程度增加，金盏菊的种子发芽率和发芽指数表现为低促高抑，百日菊的幼苗鲜质量及干质量也表现为低促高抑，其他指标呈下降趋势；而万寿菊的种子萌发指标和幼苗生长指标均呈现下降趋势，抑制作用逐渐增强。经隶属函数法分析得出3种菊科植物对重金属Pb的耐受性强弱依次为万寿菊＞百日菊＞金盏菊。
- Abstract:
- The seeds of Calendula officinalis,Zinnia elegans and Tagetes erecta were taken as test materials，and hydroponic experiments were carried out in petri dishes.The effects of different concentrations of Pb solution (0，50，100，200，400 mg·L-1) on seed germination and seedling growth of three Compositae were studied.The germination potential，germination rate，germination index，vigor index，and root length，bud length，fresh weight，and dry weight of the tested plant under different stress conditions were measured.The comprehensive evaluation of heavy metal Pb tolerance of the three plants was conducted using the membership function method,the tolerance for Compositae plants to heavy metals was studied,in order to explore the application potential of Compositae plants in ecological remediation of heavy metal lead-contaminated soil.The results showed that as the degree of stress increased，the seed germination rate and germination index of Calendula officinalis showed a low promotion and high inhibition，while the fresh and dry weight of Zinnia elegans seedlings also showed a low promotion and high inhibition，while other indicators showed a downward trend.However，the seed germination index and seedling growth index of Tagetes erect showed a downward trend，and the inhibitory effect gradually increased.Through the analysis of the membership function method，concluded that the order of the tolerance of the three Compositae plants to heavy metal Pb was Tagetes erecta>Zinnia elegans>Calendula officinalis.
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备注/Memo
第一作者简介：李亚亮(1984-)，男，硕士，副教授，现主要从事园林植物与观赏园艺、城市林业与景观生态等研究工作。E-mail：yaliangli@yeah.net.责任作者：陶晓(1984-)，女，博士，教授，现主要从事土壤微生物、植物生理生态、植被生态修复等研究工作。E-mail：2419251559@qq.com.基金项目：国家自然科学基金面上资助项目(32271954)；安徽省高校科学研究重点资助项目(SK2021A0571，KJ2020A0649)；2021年安徽省高校校企合作实践教育基地资助项目(2021xqhzsjjd076)；淮南师范学院2023年度校级科学研究重点资助项目（2023XJZD021）。收稿日期：2023-08-01