欢迎访问《草业学报》官方网站,今天是 分享到:

草业学报 ›› 2009, Vol. 18 ›› Issue (4): 241-250.

• • 上一篇    下一篇

植物病原真菌对土壤种子库的影响

侯金伟,南志标*   

  1. 兰州大学草地农业科技学院,甘肃 兰州 730020
  • 收稿日期:2009-02-05 出版日期:2009-08-20 发布日期:2009-08-20
  • 作者简介:侯金伟(1979-),男,山东莱芜人,在读博士。E-mail:houjw02@st.lzu.edu.cn
  • 基金资助:
    国家重点基础研究发展规划项目(G2000018602)资助。

The impact of plant pathogenic fungi on soil seed banks

HOU Jin-wei, NAN Zhi-biao   

  1. College of Pastoral Agricultural Science and Technology, Lanzhou University, Lanzhou 730020, China
  • Received:2009-02-05 Online:2009-08-20 Published:2009-08-20

摘要: 植物病原真菌对土壤种子库的影响是国际新兴的研究领域之一。本研究回顾与综述了近20年来该领域的研究进展。大多数已报道的研究均采用“种子袋埋藏+杀菌剂处理”的方法。应用杀菌剂处理埋藏种子能提高多种生境下土壤种子库的存活或降低其损失,其效果因生境或植物种而异。小粒种子与老龄种子更易受到病原真菌的威胁,种子内的化学防御物质有助于种子抵御病原真菌的侵袭而延长其寿命。病原真菌对种子库的影响亦与土壤水分、温度及种子埋深等土壤非生物因素及生物因素有关:在湿润条件下病原真菌作用增强,浅土层或高密度的种子库受其影响更甚,食真菌动物与非致病性细菌能够保护种子免于受害。分析了现有研究方法的特点并提出了改进的意见,建议了该领域的研究思路与方法及尚需加强研究的内容。

Abstract: The impact of plant pathogenic fungi on soil seed banks is one of the new research areas developed during the last 20 years internationally. Progress in research in this field was reviewed in this paper. So called “seed bags burial+seeds treated with fungicides” method has been employed in the majority of experiments reported in the world literature. Compared with untreated soil seed banks the survival rates have been increased or the loss rates have been reduced, of soil seed banks treated with fungicides and buried in a variety of habitats. However,the fungicide effects varied with habitats or plant species tested. Seeds from small seeded plant species or aged seeds are more vulnerable to the fungi. Seeds containing chemical defense substances showed better persistence of seed banks due to better resistance to the invasion of pathogenic fungi. The impact of pathogenic fungi on seed banks is related closely to soil abiotic factors, including soil moisture, soil temperature, and seed burial depth, and soil biotic factors. Plant pathogenic fungi showed more severe negative effects on seed banks in humid conditions than those under drier ones, on ones in shallow soil or with high density than in deeper soil or lower density ones. Fungivores and non-pathogenic bacteria can protect seeds against pathogenic fungi in soil. Suggestions on improvement of current research methods are proposed based on the advantages and disadvantages of the existing methods. Further development in research in the field are suggested.

中图分类号: