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黄山木兰的丛枝菌根定殖状况

杨安娜1,2;郑艳1,2;曹得华1;程珵1   

  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安徽师范大学中药资源研究所, 安徽芜湖 241000
  • 收稿日期:2008-12-08 修回日期:1900-01-01 出版日期:2009-07-10 发布日期:2009-07-10

Colonization of arbuscular mycorrhizae in Magnolia cylindrica roots.

YANG An-na1,2;ZHENG Yan1,2;CAO De-hua1;CHENG Cheng1   

  1. 1Provincial Key Laboratory of Biotic Environment and Ecological Safety in Anhui, College of Life Sciences, Anhui Normal University, Wuhu 241000, Anhui, China;2Institute of Traditional Chinese Medicine Resources, Anhui Normal University, Wuhu 241000, Anhui, China
  • Received:2008-12-08 Revised:1900-01-01 Online:2009-07-10 Published:2009-07-10

摘要: 在原产地和引种栽培地采集了国家珍稀濒危植物黄山木兰(Magnolia cylindrica)的根样及其根际土壤样品,研究了根中丛枝菌根真菌(AMF)的定殖状况。AMF在两地黄山木兰的根中均有定殖,并形成典型的Paris-type类型丛枝菌根(AM),原产地黄山木兰的AMF定殖率高于栽培地。用湿筛沉淀法从两地黄山木兰根际土壤中共分离鉴定出5属22种AMF,两地AMF群落相似性系数为0.96。原产地黄山木兰的AMF孢子密度高于栽培地,而Shannon-Wiener多样性指数低于栽培地。研究结果表明,黄山木兰引种栽培后并没有对其根际土壤中AMF的群落结构造成大的改变。

关键词: 棉花, 花铃期, 遮荫, 纤维品质

Abstract: The colonization of arbuscular mycorrhizal fungi (AMF) in the roots and rhizosphere soils of rare species Magnolia cylindrica sampled from its native and cultivation habitats was examined by the methods of alkaline lysising and acid fuchsin staining. All the M. cylindrica root samples were found be colonized by AMF and formed typical Paris-type AM. The AMF colonization in the root samples from native habitat was higher than that from cultivation habitat. Five genera and 22 species of AMF were isolated and identified from the rhizosphere soils by wet-sieving, and the similarity coefficient of AMF community between the two sampling sites was 096. The spore density of AMF was higher in the native habitat than in the cultivation habitat, but the reverse result was showed on Shannon-Wiener diversity index. It was suggested that the planting of M. cylindrica might not induce a great change in the community composition of AMF in rhizosphere soil.

Key words:  Cotton, Blossing and boll-forming stages, Shading, Fiber Quality