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植物研究 ›› 2026, Vol. 46 ›› Issue (5): 960-970.doi: 10.7525/j.issn.1673-5102.2026.05.016

• 研究论文 • 上一篇    

连续继代扩繁对秦岭羽枝青藓野外定植适应性的影响

闫玉涵1,2,3, 莫秋霞4, 卜崇峰1,2(), 唐亚坤1,2()   

  1. 1.中国科学院教育部水土保持与生态环境研究中心,杨凌 712100
    2.中国科学院水利部水土保持研究所,杨凌 712100
    3.中国科学院大学,北京 100049
    4.柳州钢铁股份有限公司,柳州 545002
  • 收稿日期:2026-04-26 出版日期:2026-08-28 发布日期:2026-10-10
  • 通讯作者: 卜崇峰,唐亚坤 E-mail:buchongfeng@163.com;yktang@nwsuaf.edu.cn
  • 作者简介:闫玉涵(2001—),女,硕士研究生,主要从事苔藓植物生理生态学研究。
  • 基金资助:
    国家自然科学基金面上项目(42371058)

Effects of Successive Subculture on the Field Colonization Adaptability of Brachythecium plumosum in the Qinling Mountains

Yuhan YAN1,2,3, Qiuxia MO4, Chongfeng BU1,2(), Yakun TANG1,2()   

  1. 1.Research Center of Soil and Water Conservation and Ecological Environment,Chinese Academy of Sciences and Ministry of Education,Yangling 712100
    2.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100
    3.University of Chinese Academy of Sciences,Beijing 100049
    4.Liuzhou Iron & Steel Co. ,Ltd,Liuzhou 545002
  • Received:2026-04-26 Online:2026-08-28 Published:2026-10-10
  • Contact: Chongfeng BU, Yakun TANG E-mail:buchongfeng@163.com;yktang@nwsuaf.edu.cn

摘要:

为探究长期人工扩繁对苔藓结皮种源野外定植适应性的影响,本研究对秦岭石生羽枝青藓(Brachythecium plumosum)开展室内继代扩繁、室外定植和人工模拟降雨冲刷试验,通过测定相关生长和生理指标,分析不同继代扩繁种源的野外定植适应性差异。结果表明:(1)初代种源(S0)、继代扩繁一代种源(S1)和二代种源(S2)均能快速定植,32 d后盖度均超过90%,其中S0总体生长情况最佳。(2)降雨冲刷后,S0的盖度损失最小,结皮稳定性和抗冲刷能力最强。(3)定植32 d后,S0的光合色素密度相对稳定,丙二醛(MDA)及可溶性物质含量逐渐下降,通过提高过氧化物酶(POD)活性并维持过氧化氢酶(CAT)活性缓解氧化损伤;S1和S2的光合色素含量显著降低,MDA及可溶性物质含量显著升高,其中S1的抗氧化酶响应模式与S0相似,而S2则表现不同,是以CAT活性显著升高为主要特征,POD活性增幅有限。(4)冗余分析显示,S2的生理响应模式与S0、S1显著不同,光合色素含量和抗氧化酶活性是驱动模式差异的关键指标。综上,连续继代扩繁会导致羽枝青藓种源对自然环境的适应能力减弱,在工程应用中应合理控制继代次数,以保障苔藓结皮种源的生态功能与野外定植适应性。

关键词: 继代扩繁, 苔藓结皮, 羽枝青藓, 生理特征, 环境适应

Abstract:

To investigate the effects of long-term artificial subculture on the field colonization adaptability of bryophyte crust seed sources, this study conducted indoor successive subculture, outdoor colonization, and artificial rainfall simulation scouring experiments on the saxicolous moss Brachythecium plumosum from the Qinling Mountains. The differences in field colonization adaptability among seed sources with different successive subculture generations were analyzed by measuring relevant growth and physiological indicators. The results showed that: (1)The initial generation(S0), the first successive subculture generation(S1), and the second successive subculture generation(S2) all colonized rapidly, with coverages exceeding 90% after 32 d, among which S0 exhibited the best overall growth performance. (2)After rainfall scouring, S0 showed the smallest reduction in coverage, and possessed the strongest crust stability and resistance to water erosion. (3) After 32 d of colonization, the photosynthetic pigment density of S0 remained stable, while the malondialdehyde(MDA) and soluble substance contents gradually decreased; S0 alleviated oxidative damage by increasing peroxidase(POD) activity and maintaining catalase(CAT) activity. In contrast, the photosynthetic pigment contents of S1 and S2 decreased significantly, while their MDA and soluble substance contents increased markedly. The antioxidant enzyme-responsive patterns of S1 were similar to that of S0, whereas S2 exhibited a distinct pattern, characterized primarily by a significant increase in CAT activity, with a limited increase in POD activity. (4)Redundancy analysis(RDA) showed that the physiological response patterns of S2 were significantly different from those of S0 and S1, with photosynthetic pigment content and antioxidant enzyme activities being the key indicators driving this differentiation. In conclusion, successive subculture weakens the adaptability of B. plumosum seed sources to natural environments. In engineering applications, the number of subculture generations should be reasonably controlled to ensure the ecological function and field colonization adaptability of bryophyte crust seed sources.

Key words: successive subculture, bryophyte biocrusts, Brachythecium plumosum, physiological characteristics, environmental adaptation

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