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Plant Diversity ›› 2011, Vol. 33 ›› Issue (5): 521-528.DOI: 10.3724/SP.J.1143.2011.11007

• 研究论文 • 上一篇    下一篇

丛枝菌根真菌对百喜草的生理特性的影响

 肖家欣1、2, 任群1, 吴雪俊1, 陈迎迎1, 张绍铃2   

  1. 1 安徽师范大学生命科学学院,生物环境与生态安全安徽省高校省级重点实验室,安徽 芜湖241000;
    2 南京农业大学园艺学院,江苏 南京210095
  • 收稿日期:2011-01-10 出版日期:2011-10-25 发布日期:2011-08-02
  • 基金资助:

    Specialized Research Fund for the Doctoral Program of Higher Education(20103424120002), China Postdoctoral Science Foundation (20080430172) and Anhui Provincial Natural Science Foundation (070411004)

Effects of Arbuscular Mycorrhizal Fungi on Physiological Character of Bahia Grass (Paspalum notatum, Poaceae)

 XIAO  Jia-Xin-1、2, REN  Qun-1, Wu  Xue-Jun-1, CHEN  Ying-Ying-1, ZHANG  Shao-Ling-2   

  1. 1 Key Laboratory of Biotic Environment and Ecological Security, Anhui Province, College of Life Sciences,
    Anhui Normal University, Wuhu 241000, China; 2 College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2011-01-10 Online:2011-10-25 Published:2011-08-02
  • Supported by:

    Specialized Research Fund for the Doctoral Program of Higher Education(20103424120002), China Postdoctoral Science Foundation (20080430172) and Anhui Provincial Natural Science Foundation (070411004)

摘要:

采用盆栽法研究了丛枝菌根(AM)真菌摩西球囊霉(Glomus mosseae)对水分胁迫条件下百喜草(Paspalum notatum)生长、渗透调节及抗氧化酶的影响。结果表明:接种AM真菌显著提高了百喜草的株高、地上部与根部鲜重、地上部P、K、Mn及根部P、Ca、Mn含量,明显降低了地上部Zn及根部Fe、B、Cu水平;随着干旱程度的加深,接种株的地上部相对含水量及叶绿素含量相对稳定且均显著高于未接种株,接种株地上部相对电导率、MDA含量均显著低于未接种株,接种株的地上部POD活性与脯氨酸含量均显著增加且均显著高于未接种株,AM侵染对SOD活性的影响较小。可见,接种AM真菌Glomus mosseae提高了植株体内保护酶活性(如POD)及渗透调节能力(如脯氨酸、P、K、Ca等渗透调节物含量的增加),从而显著增强了百喜草的抗旱性。

关键词: 丛枝菌根真菌, 百喜草, 抗氧化物质, 渗透调节, 水分胁迫

Abstract:

The effects of arbuscular mycorrhizal (AM) fungus, Glomus mosseae, on growth, osmotic adjustment and antioxidant enzymes of bahia grass (Paspalum notatum) were studied in potted plants under water stress conditions. AM colonization significantly enhanced the plant height, root and shoot fresh weight, Phosphorus (P), potasium (K), manganese (Mn) contents in shoots, P, calcium (Ca), Mn contents in roots, whereas obviously decreased zinc (Zn) content in shoots, iron (Fe), boron (B), copper (Cu) contents in roots. During water stress, the relative water and chlorophyll contents were relatively stable and signifciantly higher in AM than in non-AM plants, AM inoculation notabley decreased the shoot relative conductivity and malondialdehyde (MDA) content, markedly increased shoot peroxidase (POD) activity and proline content, while AM infection did not affect the dismutase (SOD) activity of shoots. Our results suggested that AM colonization improved the protective enzyme activity (such as POD) and osmotic adjustment originating from proline P, K, Ca, resulting in the enhancement of drought tolerance.

Key words: Arbuscular mycorrhizal fungi, Bahia grass, Antioxidant, Osmotic adjustment, Water stress

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